From caed92a6322fa50ddedd2fb8091c2651909e1302 Mon Sep 17 00:00:00 2001 From: Corey Huinker Date: Thu, 21 Mar 2024 18:04:54 -0400 Subject: [PATCH v17 1/2] Create pg_set_relation_stats, pg_set_attribute_stats. These functions will be used by pg_dump/restore and pg_upgrade to convey relation and attribute statistics from the source database to the target. This would be done instead of vacuumdb --analyze-in-stages. Both functions take an oid to identify the target relation that will receive the statistics. There is nothing requiring that relation to be the same one as the one exported, though the statistics supplied have to make sense in the context of the new relation. Both functions take a variadic list of statistic parameters name-value pairs. Each name given for pg_set_relation_stats must correspond to a statistics attribute in pg_class, and the paired value must match the datatype of said attribute in pg_class. Each name given for pg_set_attribute_stats must correspond to a statistics attribute in pg_stats, and the paird value must match the datatype of said attribute in pg_stats, except for attributes of type ANYARRAY, in which case a TEXT value is required. The statistics imported by pg_set_attribute_stats are imported transactionally like any other operation. However, pg_set_relation_stats does it's update in-place, which is to say non-transactionally. This is in line with what ANALYZE does to avoid table bloat in pg_class. These functions allows for tweaking of table statistics in-place, allowing the user to inflate rowcounts, skew histograms, etc, to see what those changes will evoke from the query planner. --- src/include/catalog/pg_proc.dat | 22 +- src/include/statistics/statistics.h | 2 + src/backend/statistics/Makefile | 3 +- src/backend/statistics/meson.build | 1 + src/backend/statistics/statistics.c | 1239 +++++++++++++++++ .../regress/expected/stats_export_import.out | 853 ++++++++++++ src/test/regress/parallel_schedule | 3 +- src/test/regress/sql/stats_export_import.sql | 671 +++++++++ doc/src/sgml/func.sgml | 267 ++++ 9 files changed, 3056 insertions(+), 5 deletions(-) create mode 100644 src/backend/statistics/statistics.c create mode 100644 src/test/regress/expected/stats_export_import.out create mode 100644 src/test/regress/sql/stats_export_import.sql diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat index 153d816a05..d8edcb25cd 100644 --- a/src/include/catalog/pg_proc.dat +++ b/src/include/catalog/pg_proc.dat @@ -12183,9 +12183,6 @@ proallargtypes => '{int8,pg_lsn,pg_lsn,oid,oid,oid,int2,int8,bool}', proargmodes => '{i,i,i,o,o,o,o,o,o}', proargnames => '{tli,start_lsn,end_lsn,relfilenode,reltablespace,reldatabase,relforknumber,relblocknumber,is_limit_block}', - prosrc => 'pg_wal_summary_contents' }, -{ oid => '8438', - descr => 'WAL summarizer state', proname => 'pg_get_wal_summarizer_state', provolatile => 'v', proparallel => 's', prorettype => 'record', proargtypes => '', @@ -12200,4 +12197,23 @@ proargtypes => 'int2', prosrc => 'gist_stratnum_identity' }, +# Statistics Import +{ oid => '8048', + descr => 'set statistics on relation', + proname => 'pg_set_relation_stats', provariadic => 'any', + proisstrict => 't', provolatile => 'v', + proparallel => 'u', prorettype => 'bool', + proargtypes => 'regclass int4 any', + proargnames => '{relation,version,stats}', + proargmodes => '{i,i,v}', + prosrc => 'pg_set_relation_stats' }, +{ oid => '8049', + descr => 'set statistics on attribute', + proname => 'pg_set_attribute_stats', provariadic => 'any', + proisstrict => 't', provolatile => 'v', + proparallel => 'u', prorettype => 'bool', + proargtypes => 'regclass name bool int4 any', + proargnames => '{relation,attname,inherited,version,stats}', + proargmodes => '{i,i,i,i,v}', + prosrc => 'pg_set_attribute_stats' }, ] diff --git a/src/include/statistics/statistics.h b/src/include/statistics/statistics.h index 7f2bf18716..1dddf96576 100644 --- a/src/include/statistics/statistics.h +++ b/src/include/statistics/statistics.h @@ -127,4 +127,6 @@ extern StatisticExtInfo *choose_best_statistics(List *stats, char requiredkind, int nclauses); extern HeapTuple statext_expressions_load(Oid stxoid, bool inh, int idx); +extern Datum pg_set_relation_stats(PG_FUNCTION_ARGS); +extern Datum pg_set_attribute_stats(PG_FUNCTION_ARGS); #endif /* STATISTICS_H */ diff --git a/src/backend/statistics/Makefile b/src/backend/statistics/Makefile index 89cf8c2797..e4f8ab7c4f 100644 --- a/src/backend/statistics/Makefile +++ b/src/backend/statistics/Makefile @@ -16,6 +16,7 @@ OBJS = \ dependencies.o \ extended_stats.o \ mcv.o \ - mvdistinct.o + mvdistinct.o \ + statistics.o include $(top_srcdir)/src/backend/common.mk diff --git a/src/backend/statistics/meson.build b/src/backend/statistics/meson.build index 73b29a3d50..331e82c776 100644 --- a/src/backend/statistics/meson.build +++ b/src/backend/statistics/meson.build @@ -5,4 +5,5 @@ backend_sources += files( 'extended_stats.c', 'mcv.c', 'mvdistinct.c', + 'statistics.c', ) diff --git a/src/backend/statistics/statistics.c b/src/backend/statistics/statistics.c new file mode 100644 index 0000000000..08b720e7c2 --- /dev/null +++ b/src/backend/statistics/statistics.c @@ -0,0 +1,1239 @@ +/*------------------------------------------------------------------------- + * statistics.c + * + * POSTGRES statistics import + * + * Code supporting the direct importation of relation statistics, similar to + * what is done by the ANALYZE command. + * + * + * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * IDENTIFICATION + * src/backend/statistics/statistics.c + * + *------------------------------------------------------------------------- + */ + +#include "postgres.h" + +#include "access/heapam.h" +#include "catalog/pg_collation.h" +#include "catalog/pg_database.h" +#include "catalog/pg_operator.h" +#include "catalog/pg_type.h" +#include "catalog/indexing.h" +#include "catalog/pg_type.h" +#include "fmgr.h" +#include "funcapi.h" +#include "miscadmin.h" +#include "nodes/nodeFuncs.h" +#include "statistics/statistics.h" +#include "utils/acl.h" +#include "utils/array.h" +#include "utils/builtins.h" +#include "utils/float.h" +#include "utils/fmgroids.h" +#include "utils/lsyscache.h" +#include "utils/rangetypes.h" +#include "utils/syscache.h" +#include "utils/typcache.h" + +/* + * A role has privileges to set statistics on the relation if any of the + * following are true: + * - the role owns the current database and the relation is not shared + * - the role has the MAINTAIN privilege on the relation + * + */ +static bool +can_modify_relation(Relation rel) +{ + Oid relid = RelationGetRelid(rel); + Form_pg_class reltuple = rel->rd_rel; + + return ((object_ownercheck(DatabaseRelationId, MyDatabaseId, GetUserId()) + && !reltuple->relisshared) || + pg_class_aclcheck(relid, GetUserId(), ACL_MAINTAIN) == ACLCHECK_OK); +} + +/* + * Set statistics for a given pg_class entry. + * + * This does an in-place (i.e. non-transactional) update of pg_class, just as + * is done in ANALYZE. + * + */ +Datum +pg_set_relation_stats(PG_FUNCTION_ARGS) +{ + Oid relid = PG_GETARG_OID(0); + int version = PG_GETARG_INT32(1); + + /* indexes of where we found required stats */ + int i_relpages = 0; + int i_reltuples = 0; + int i_relallvisible = 0; + + /* build argument values to build the object */ + Datum *args; + bool *nulls; /* placeholder, because strict */ + Oid *types; + int nargs; + + /* Minimum version supported */ + if (version <= 90200) + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("Cannot export statistics prior to version 9.2"))); + + nargs = extract_variadic_args(fcinfo, 2, true, &args, &types, &nulls); + + /* if the pairs aren't pairs, something is malformed */ + if (nargs % 2 == 1) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("stats parameters must be in name-value pairs"))); + PG_RETURN_BOOL(false); + } + + /* loop through args, matching params to their arg indexes */ + for (int i = 0; i < nargs; i += 2) + { + char *statname; + int argidx = i + 1; + + if (types[i] != TEXTOID) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("stat names must be of type text"))); + continue; + } + statname = TextDatumGetCString(args[i]); + + /* + * match each named parameter to the index of the value that follows + * it + */ + if (strcmp(statname, "relpages") == 0) + i_relpages = argidx; + else if (strcmp(statname, "reltuples") == 0) + i_reltuples = argidx; + else if (strcmp(statname, "relallvisible") == 0) + i_relallvisible = argidx; + else + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("unknown stat naame '%s', skipping", statname))); + + pfree(statname); + } + + /* + * Ensure that we got all required parameters, and they are of the correct + * type. + */ + if (i_relpages == 0) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("required parameter %s not set", "relpages"))); + PG_RETURN_BOOL(false); + } + else if (types[i_relpages] != INT4OID) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("relpages must be of type integer"))); + PG_RETURN_BOOL(false); + } + else if (i_reltuples == 0) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("required parameter %s not set", "reltuples"))); + PG_RETURN_BOOL(false); + } + else if (types[i_reltuples] != FLOAT4OID) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("reltuples must be of type real"))); + PG_RETURN_BOOL(false); + } + else if (types[i_relallvisible] != INT4OID) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("required parameter %s not set", "relallvisible"))); + PG_RETURN_BOOL(false); + } + else if (i_relallvisible == -1) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("relallvisible must be of type integer"))); + PG_RETURN_BOOL(false); + } + else + { + /* + * Open the relation, getting ShareUpdateExclusiveLock to ensure that + * no other stat-setting operation can run on it concurrently. + */ + Relation rel; + HeapTuple ctup; + Form_pg_class pgcform; + int relpages; + float4 reltuples; + int relallvisible; + + rel = table_open(RelationRelationId, ShareUpdateExclusiveLock); + + if (!can_modify_relation(rel)) + { + table_close(rel, NoLock); + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("must be owner to modify relation stats"))); + PG_RETURN_BOOL(false); + } + + relpages = DatumGetInt32(args[i_relpages]); + reltuples = DatumGetFloat4(args[i_reltuples]); + relallvisible = DatumGetInt32(args[i_relallvisible]); + + ctup = SearchSysCacheCopy1(RELOID, ObjectIdGetDatum(relid)); + if (!HeapTupleIsValid(ctup)) + ereport(ERROR, + (errcode(ERRCODE_OBJECT_IN_USE), + errmsg("pg_class entry for relid %u not found", relid))); + + pgcform = (Form_pg_class) GETSTRUCT(ctup); + /* Only update pg_class if there is a meaningful change */ + if ((pgcform->reltuples != reltuples) + || (pgcform->relpages != relpages) + || (pgcform->relallvisible != relallvisible)) + { + pgcform->relpages = relpages; + pgcform->reltuples = reltuples; + pgcform->relallvisible = relallvisible; + + heap_inplace_update(rel, ctup); + } + + table_close(rel, NoLock); + PG_RETURN_BOOL(true); + } + + PG_RETURN_BOOL(false); +} + +/* + * Test if the type is a scalar for MCELEM purposes + */ +static bool +type_is_scalar(Oid typid) +{ + HeapTuple tp; + bool result = false; + + tp = SearchSysCache1(TYPEOID, ObjectIdGetDatum(typid)); + if (HeapTupleIsValid(tp)) + { + Form_pg_type typtup = (Form_pg_type) GETSTRUCT(tp); + + result = (!OidIsValid(typtup->typanalyze)); + ReleaseSysCache(tp); + } + return result; +} + +/* + * Fetch datatype information, this is needed to derive the proper staopN + * and stacollN values. + * + * If this relation is an index and that index has expressions in it, and + * the attnum specified is known to be an expression, then we must walk + * the list attributes up to the specified attnum to get the right + * expression. + * + */ +static TypeCacheEntry * +get_attr_stat_type(Relation rel, Name attname, + int16 *attnum, int32 *typmod, Oid *typcoll) +{ + Oid relid = RelationGetRelid(rel); + Form_pg_attribute attr; + HeapTuple atup; + Oid typid; + + atup = SearchSysCache2(ATTNAME, ObjectIdGetDatum(relid), + NameGetDatum(attname)); + + /* Attribute not found */ + if (!HeapTupleIsValid(atup)) + { + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("Relation %s has no attname %s", + RelationGetRelationName(rel), + NameStr(*attname)))); + return NULL; + } + + attr = (Form_pg_attribute) GETSTRUCT(atup); + if (attr->attisdropped) + { + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("Relation %s attname %s is dropped", + RelationGetRelationName(rel), + NameStr(*attname)))); + return NULL; + } + *attnum = attr->attnum; + + if ((rel->rd_rel->relkind == RELKIND_INDEX + || (rel->rd_rel->relkind == RELKIND_PARTITIONED_INDEX)) + && (rel->rd_indexprs != NIL) + && (rel->rd_index->indkey.values[attr->attnum - 1] == 0)) + { + ListCell *indexpr_item = list_head(rel->rd_indexprs); + Node *expr; + + for (int i = 0; i < attr->attnum - 1; i++) + if (rel->rd_index->indkey.values[i] == 0) + indexpr_item = lnext(rel->rd_indexprs, indexpr_item); + + if (indexpr_item == NULL) /* shouldn't happen */ + elog(ERROR, "too few entries in indexprs list"); + + expr = (Node *) lfirst(indexpr_item); + + typid = exprType(expr); + *typmod = exprTypmod(expr); + + /* + * If a collation has been specified for the index column, use that in + * preference to anything else; but if not, fall back to whatever we + * can get from the expression. + */ + if (OidIsValid(attr->attcollation)) + *typcoll = attr->attcollation; + else + *typcoll = exprCollation(expr); + } + else + { + typid = attr->atttypid; + *typmod = attr->atttypmod; + *typcoll = attr->attcollation; + } + ReleaseSysCache(atup); + + /* if it's a multirange, step down to the range type */ + if (type_is_multirange(typid)) + typid = get_multirange_range(typid); + + return lookup_type_cache(typid, + TYPECACHE_LT_OPR | TYPECACHE_EQ_OPR); +} + +/* + * Perform the cast of a known TextDatum into the type specified. + * + * If no errors are found, ok is set to true. Otherwise, set ok + * to false, capture the error found, and re-throw at warning level. + */ +static Datum +cast_stavalues(FmgrInfo *flinfo, Datum d, Oid typid, int32 typmod, bool *ok) +{ + LOCAL_FCINFO(fcinfo, 8); + char *s; + Datum result; + ErrorSaveContext escontext = {T_ErrorSaveContext}; + + escontext.details_wanted = true; + + s = TextDatumGetCString(d); + + InitFunctionCallInfoData(*fcinfo, flinfo, 3, InvalidOid, + (Node *) &escontext, NULL); + + fcinfo->args[0].value = CStringGetDatum(s); + fcinfo->args[0].isnull = false; + fcinfo->args[1].value = ObjectIdGetDatum(typid); + fcinfo->args[1].isnull = false; + fcinfo->args[2].value = Int32GetDatum(typmod); + fcinfo->args[2].isnull = false; + + result = FunctionCallInvoke(fcinfo); + + if (SOFT_ERROR_OCCURRED(&escontext)) + { + escontext.error_data->elevel = WARNING; + ThrowErrorData(escontext.error_data); + *ok = false; + } + else + *ok = true; + + pfree(s); + + return result; +} + + +/* + * Check array for any NULLs, and optionally for one-dimensionality + * + * Report any failures as warnings. + */ +static bool +array_check(Datum datum, int one_dim, const char *statname) +{ + ArrayType *arr = DatumGetArrayTypeP(datum); + int16 elmlen; + char elmalign; + bool elembyval; + Datum *values; + bool *nulls; + int nelems; + + if (one_dim && (arr->ndim != 1)) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be a multidimensional array", statname))); + return false; + } + + get_typlenbyvalalign(ARR_ELEMTYPE(arr), &elmlen, &elembyval, &elmalign); + + deconstruct_array(arr, ARR_ELEMTYPE(arr), elmlen, elembyval, elmalign, + &values, &nulls, &nelems); + + for (int i = 0; i < nelems; i++) + if (nulls[i]) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s array cannot contain NULL values", statname))); + return false; + } + return true; +} + +/* + * Update the pg_statistic record. + */ +static void +update_pg_statistic(Datum values[], bool nulls[]) +{ + Relation sd = table_open(StatisticRelationId, RowExclusiveLock); + CatalogIndexState indstate = CatalogOpenIndexes(sd); + HeapTuple oldtup; + HeapTuple stup; + + /* Is there already a pg_statistic tuple for this attribute? */ + oldtup = SearchSysCache3(STATRELATTINH, + values[Anum_pg_statistic_starelid - 1], + values[Anum_pg_statistic_staattnum - 1], + values[Anum_pg_statistic_stainherit - 1]); + + if (HeapTupleIsValid(oldtup)) + { + /* Yes, replace it */ + bool replaces[Natts_pg_statistic]; + + for (int i = 0; i < Natts_pg_statistic; i++) + replaces[i] = true; + + stup = heap_modify_tuple(oldtup, RelationGetDescr(sd), + values, nulls, replaces); + ReleaseSysCache(oldtup); + CatalogTupleUpdateWithInfo(sd, &stup->t_self, stup, indstate); + } + else + { + /* No, insert new tuple */ + stup = heap_form_tuple(RelationGetDescr(sd), values, nulls); + CatalogTupleInsertWithInfo(sd, stup, indstate); + } + + heap_freetuple(stup); + CatalogCloseIndexes(indstate); + table_close(sd, NoLock); +} + +/* + * Import statistics for a given relation attribute. + * + * This will insert/replace a row in pg_statistic for the given combinarion + * of relation, attribute, and inherited flag. + * + * The version parameter is for future use in the events as future versions + * may change them meaning of certain parameters. + * + * The variadic parameters all represent name-value pairs, with the names + * corresponding to attributes in pg_stats. Unkown names will generate a + * warning. + * + * Parameters null_frac, avg_width, and n_distinct are required because + * those attributes have no default value in pg_statistic. + * + * The remaining parameters all belong to a specific stakind, and all are + * optional. Some stakinds have multiple parameters, and in those cases + * both parameters must be specified if one of them is, otherwise a + * warning is generated but the rest of the stats may still be imported. + * + * If there is no attribute with a matching attname in the relation, the + * function will raise a warning and return false. + * + * Parameters corresponding to ANYARRAY columns are instead passed in as text + * values, which is a valid input string for an array of the type or element + * type of the attribute. + */ +Datum +pg_set_attribute_stats(PG_FUNCTION_ARGS) +{ + Oid relid = PG_GETARG_OID(0); + Name attname = PG_GETARG_NAME(1); + bool inherited = PG_GETARG_BOOL(2); + int version = PG_GETARG_INT32(3); + + /* build argument values to build the object */ + Datum *args; + bool *argnulls; /* placeholder, because strict */ + Oid *types; + int nargs = extract_variadic_args(fcinfo, 4, true, + &args, &types, &argnulls); + + Datum values[Natts_pg_statistic] = {0}; + bool nulls[Natts_pg_statistic] = {false}; + + /* + * argument indexes for each known statistic + * + * 0 = not found, -1 = error, n > 0 = found + */ + + /* parameters that are required get indexes */ + int i_null_frac = 0; + int i_avg_width = 0; + int i_n_distinct = 0; + + /* stakind stats are optional */ + int i_mc_vals = 0; + int i_mc_freqs = 0; + int i_hist_bounds = 0; + int i_correlation = 0; + int i_mc_elems = 0; + int i_mc_elem_freqs = 0; + int i_elem_count_hist = 0; + int i_range_length_hist = 0; + int i_range_empty_frac = 0; + int i_range_bounds_hist = 0; + + Relation rel; + + TypeCacheEntry *typcache; + TypeCacheEntry *elemtypcache; + + int16 attnum; + int32 typmod; + Oid typcoll; + + FmgrInfo finfo; + + int stakind_count; + + int k = 0; + + if (version <= 90200) + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("Cannot export statistics prior to version 9.2"))); + + /* if the pairs aren't pairs, something is malformed */ + if (nargs % 2 == 1) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("stats parameters must be in name-value pairs"))); + PG_RETURN_BOOL(false); + } + + for (int i = 0; i < nargs; i += 2) + { + char *statname; + int argidx = i + 1; + + if (types[i] != TEXTOID) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("stat names must be of type text"))); + break; + } + statname = TextDatumGetCString(args[i]); + + if (strcmp(statname, "null_frac") == 0) + i_null_frac = argidx; + else if (strcmp(statname, "avg_width") == 0) + i_avg_width = argidx; + else if (strcmp(statname, "n_distinct") == 0) + i_n_distinct = argidx; + else if (strcmp(statname, "most_common_vals") == 0) + i_mc_vals = argidx; + else if (strcmp(statname, "most_common_freqs") == 0) + i_mc_freqs = argidx; + else if (strcmp(statname, "histogram_bounds") == 0) + i_hist_bounds = argidx; + else if (strcmp(statname, "correlation") == 0) + i_correlation = argidx; + else if (strcmp(statname, "most_common_elems") == 0) + i_mc_elems = argidx; + else if (strcmp(statname, "most_common_elem_freqs") == 0) + i_mc_elem_freqs = argidx; + else if (strcmp(statname, "elem_count_histogram") == 0) + i_elem_count_hist = argidx; + else if (strcmp(statname, "range_length_histogram") == 0) + i_range_length_hist = argidx; + else if (strcmp(statname, "range_empty_frac") == 0) + i_range_empty_frac = argidx; + else if (strcmp(statname, "range_bounds_histogram") == 0) + i_range_bounds_hist = argidx; + else + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("unknown stat naame '%s', skipping", statname))); + + pfree(statname); + } + + /* check all required parameters */ + if (i_null_frac > 0) + { + if (types[i_null_frac] == FLOAT4OID) + values[Anum_pg_statistic_stanullfrac - 1] = args[i_null_frac]; + else + { + /* required param, not recoverable */ + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be of type %s", "null_frac", + "real"))); + PG_RETURN_BOOL(false); + } + } + else + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("required parameter %s not set", "null_frac"))); + PG_RETURN_BOOL(false); + } + + if (i_avg_width > 0) + { + if (types[i_avg_width] == INT4OID) + values[Anum_pg_statistic_stawidth - 1] = args[i_avg_width]; + else + { + /* required param, not recoverable */ + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be of type %s", "avg_width", + "integer"))); + PG_RETURN_BOOL(false); + } + } + else + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("required parameter %s not set", "avg_width"))); + PG_RETURN_BOOL(false); + } + + if (i_n_distinct > 0) + { + if (types[i_n_distinct] == FLOAT4OID) + values[Anum_pg_statistic_stadistinct - 1] = args[i_n_distinct]; + else + { + /* required param, not recoverable */ + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be of type %s", "n_distinct", + "real"))); + PG_RETURN_BOOL(false); + } + } + else + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("required parameter %s not set", "n_distinct"))); + PG_RETURN_BOOL(false); + } + + /* look for pair mismatches */ + if ((i_mc_vals == 0) != (i_mc_freqs == 0)) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be present if %s is missing", + (i_mc_vals == 0) ? "most_common_freqs" : + "most_common_vals", + (i_mc_vals == 0) ? "most_common_vals" : + "most_common_freqs"))); + PG_RETURN_BOOL(false); + } + if ((i_mc_elems == 0) != (i_mc_elem_freqs == 0)) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be present if %s is missing", + (i_mc_elems == 0) ? + "most_common_elem_freqs" : + "most_common_elems", + (i_mc_elems == 0) ? + "most_common_elems" : + "most_common_elem_freqs"))); + PG_RETURN_BOOL(false); + } + if ((i_range_length_hist == 0) != (i_range_empty_frac == 0)) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot be present if %s is missing", + (i_range_length_hist == 0) ? + "range_empty_frac" : + "range_length_histogram", + (i_range_length_hist == 0) ? + "range_length_histogram" : + "range_empty_frac"))); + PG_RETURN_BOOL(false); + } + + /* + * count the number of stakinds we want to set, paired params count as + * one. The count cannot exceed STATISTIC_NUM_SLOTS. + */ + stakind_count = (int) (i_mc_vals > 0) + + (int) (i_mc_elems > 0) + + (int) (i_range_length_hist > 0) + + (int) (i_hist_bounds > 0) + + (int) (i_correlation > 0) + + (int) (i_elem_count_hist > 0) + + (int) (i_range_bounds_hist > 0); + + if (stakind_count > STATISTIC_NUM_SLOTS) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("imported statistics must have a maximum of %d slots " + "but %d given", + STATISTIC_NUM_SLOTS, stakind_count))); + PG_RETURN_BOOL(false); + } + + rel = relation_open(relid, ShareUpdateExclusiveLock); + + if (!can_modify_relation(rel)) + { + relation_close(rel, NoLock); + ereport(WARNING, + (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE), + errmsg("permission denied for relation %s", + RelationGetRelationName(rel)))); + PG_RETURN_BOOL(false); + } + + /* + * Many of the values that are set for a particular stakind are entirely + * derived from the attribute itself, or it's expression. + */ + typcache = get_attr_stat_type(rel, attname, &attnum, &typmod, &typcoll); + if (typcache == NULL) + PG_RETURN_BOOL(false); + + /* + * Derive element type if we have stat kinds that need it. + * + * This duplicates some type-specific logic found in various typanalyze + * functions which are called from vacuum's examine_attribute(). + */ + if ((i_mc_elems > 0) || (i_elem_count_hist > 0)) + { + Oid elemtypid; + + if (typcache->type_id == TSVECTOROID) + { + /* + * tsvector elems always have a text oid type and default + * collation + */ + elemtypid = TEXTOID; + typcoll = DEFAULT_COLLATION_OID; + } + else if (typcache->typtype == TYPTYPE_RANGE) + elemtypid = get_range_subtype(typcache->type_id); + else + elemtypid = get_base_element_type(typcache->type_id); + + /* not finding a basetype means we already had it */ + if (elemtypid == InvalidOid) + elemtypid = typcache->type_id; + + /* The stats need the eq_opr, but validation needs the lt_opr */ + elemtypcache = lookup_type_cache(elemtypid, + TYPECACHE_LT_OPR | TYPECACHE_EQ_OPR); + } + + /* + * histogram_bounds and correlation must have a type < operator. WARN and + * skip if this attribute doesn't have one. + */ + if (typcache->lt_opr == InvalidOid) + { + if (i_hist_bounds > 0) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot accept %s stats, ignored", + NameStr(*attname), + "histogram_bounds"))); + i_hist_bounds = -1; + } + if (i_correlation > 0) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot accept %s stats, ignored", + NameStr(*attname), + "correlation"))); + i_correlation = -1; + } + } + + /* + * Scalar types can't have most_common_elems, most_common_elem_freqs, + * elem_count_histogram. WARN and skip. + */ + if (type_is_scalar(typcache->type_id)) + { + if (i_mc_elems > 0) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot accept %s stats, ignored", + NameStr(*attname), + "most_common_elems"))); + i_mc_elems = -1; + } + if (i_mc_elem_freqs > 0) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot accept %s stats, ignored", + NameStr(*attname), + "most_common_elem_freqs"))); + i_mc_elem_freqs = -1; + } + if (i_elem_count_hist > 0) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot accept %s stats, ignored", + NameStr(*attname), + "elem_count_histogram"))); + i_elem_count_hist = -1; + } + } + + /* + * Only range types can have range_length_histogram, range_empty_frac, and + * range_bounds_histogram. WARN and skip + */ + if ((typcache->typtype != TYPTYPE_RANGE) && + (typcache->typtype != TYPTYPE_RANGE)) + { + if (i_range_length_hist > 0) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot accept %s stats, ignored", + NameStr(*attname), + "range_length_histogram"))); + i_range_length_hist = -1; + } + if (i_range_empty_frac > 0) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot accept %s stats, ignored", + NameStr(*attname), + "range_empty_frac"))); + i_range_empty_frac = -1; + } + if (i_range_bounds_hist > 0) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s cannot accept %s stats, ignored", + NameStr(*attname), + "range_bounds_histogram"))); + i_range_bounds_hist = -1; + } + } + + values[Anum_pg_statistic_starelid - 1] = ObjectIdGetDatum(relid); + values[Anum_pg_statistic_staattnum - 1] = Int16GetDatum(attnum); + values[Anum_pg_statistic_stainherit - 1] = BoolGetDatum(inherited); + + fmgr_info(F_ARRAY_IN, &finfo); + + /* + * STATISTIC_KIND_MCV + * + * most_common_freqs: real[] most_common_vals : ANYARRAY::text + */ + if (i_mc_vals > 0) + { + bool ok = true; + Oid numberstype = types[i_mc_freqs]; + Oid valuestype = types[i_mc_vals]; + Datum stanumbers = args[i_mc_freqs]; + Datum strvalue = args[i_mc_vals]; + + if (get_element_type(numberstype) != FLOAT4OID) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be type %s, ignored", + "most_common_freqs", "real[]"))); + ok = false; + } + else if (valuestype != TEXTOID) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be type %s, ignored", + "most_common_vals", "text"))); + ok = false; + } + + if (ok) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_MCV); + Datum staop = ObjectIdGetDatum(typcache->eq_opr); + Datum stacoll = ObjectIdGetDatum(typcoll); + Datum stavalues; + bool converted = false; + + stavalues = cast_stavalues(&finfo, strvalue, typcache->type_id, + typmod, &converted); + + if (converted && + array_check(stavalues, false, "most_common_vals") && + array_check(stanumbers, true, "most_common_freqs")) + { + values[Anum_pg_statistic_stakind1 - 1 + k] = stakind; + values[Anum_pg_statistic_staop1 - 1 + k] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + k] = stacoll; + values[Anum_pg_statistic_stanumbers1 - 1 + k] = stanumbers; + values[Anum_pg_statistic_stavalues1 - 1 + k] = stavalues; + + k++; + } + } + } + + /* + * STATISTIC_KIND_HISTOGRAM + * + * histogram_bounds: ANYARRAY::text + */ + if (i_hist_bounds > 0) + { + Oid valuestype = types[i_hist_bounds]; + Datum strvalue = args[i_hist_bounds]; + + if (valuestype == TEXTOID) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_HISTOGRAM); + Datum staop = ObjectIdGetDatum(typcache->lt_opr); + Datum stacoll = ObjectIdGetDatum(typcoll); + Datum stavalues; + bool converted = false; + + stavalues = cast_stavalues(&finfo, strvalue, typcache->type_id, + typmod, &converted); + + if (converted && array_check(stavalues, false, "histogram_bounds")) + { + values[Anum_pg_statistic_stakind1 - 1 + k] = stakind; + values[Anum_pg_statistic_staop1 - 1 + k] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + k] = stacoll; + nulls[Anum_pg_statistic_stanumbers1 - 1 + k] = true; + values[Anum_pg_statistic_stavalues1 - 1 + k] = stavalues; + + k++; + } + } + else + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be type %s, ignored", + "histogram_bounds", "text"))); + } + + /* + * STATISTIC_KIND_CORRELATION + * + * correlation: real + */ + if (i_correlation > 0) + { + if (types[i_correlation] == FLOAT4OID) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_CORRELATION); + Datum staop = ObjectIdGetDatum(typcache->lt_opr); + Datum stacoll = ObjectIdGetDatum(typcoll); + Datum elems[] = {args[i_correlation]}; + ArrayType *arry = construct_array_builtin(elems, 1, FLOAT4OID); + Datum stanumbers = PointerGetDatum(arry); + + values[Anum_pg_statistic_stakind1 - 1 + k] = stakind; + values[Anum_pg_statistic_staop1 - 1 + k] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + k] = stacoll; + values[Anum_pg_statistic_stanumbers1 - 1 + k] = stanumbers; + nulls[Anum_pg_statistic_stavalues1 - 1 + k] = true; + + k++; + } + else + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be of type %s, ignored", + "correlation", "real"))); + } + + /* + * STATISTIC_KIND_MCELEM + * + * most_common_elem_freqs: real[] most_common_elems : ANYARRAY::text + */ + if (i_mc_elems > 0) + { + bool ok = true; + Oid numberstype = types[i_mc_elem_freqs]; + Oid valuestype = types[i_mc_elems]; + Datum stanumbers = args[i_mc_elem_freqs]; + + if (get_element_type(numberstype) != FLOAT4OID) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be type %s, ignored", + "most_common_elem_freqs", "real[]"))); + ok = false; + } + else if (valuestype != TEXTOID) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be type %s, ignored", + "most_common_elems", "text"))); + ok = false; + } + + if (ok) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_MCELEM); + Datum staop = ObjectIdGetDatum(elemtypcache->eq_opr); + Datum stacoll = ObjectIdGetDatum(typcoll); + Datum strvalue = args[i_mc_elems]; + bool converted = false; + Datum stavalues; + + stavalues = cast_stavalues(&finfo, strvalue, elemtypcache->type_id, + typmod, &converted); + + if (converted && + array_check(stavalues, false, "most_common_elems") && + array_check(stanumbers, true, "most_common_elem_freqs")) + { + values[Anum_pg_statistic_stakind1 - 1 + k] = stakind; + values[Anum_pg_statistic_staop1 - 1 + k] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + k] = stacoll; + values[Anum_pg_statistic_stanumbers1 - 1 + k] = stanumbers; + values[Anum_pg_statistic_stavalues1 - 1 + k] = stavalues; + + k++; + } + } + } + + /* + * STATISTIC_KIND_DECHIST + * + * elem_count_histogram: real[] + */ + if (i_elem_count_hist > 0) + { + Oid numberstype = types[i_elem_count_hist]; + + if (get_element_type(numberstype) == FLOAT4OID) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_DECHIST); + Datum staop = ObjectIdGetDatum(elemtypcache->eq_opr); + Datum stacoll = ObjectIdGetDatum(typcoll); + Datum stanumbers = args[i_elem_count_hist]; + + if (array_check(stanumbers, true, "elem_count_histogram")) + { + values[Anum_pg_statistic_stakind1 - 1 + k] = stakind; + values[Anum_pg_statistic_staop1 - 1 + k] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + k] = stacoll; + values[Anum_pg_statistic_stanumbers1 - 1 + k] = stanumbers; + nulls[Anum_pg_statistic_stavalues1 - 1 + k] = true; + + k++; + } + } + else + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be type %s, ignored", + "elem_count_histogram", "real[]"))); + } + + /* + * STATISTIC_KIND_BOUNDS_HISTOGRAM + * + * range_bounds_histogram: ANYARRAY::text + * + * This stakind appears before STATISTIC_KIND_BOUNDS_HISTOGRAM even though + * it is numerically greater, and all other stakinds appear in numerical + * order. We duplicate this quirk to make before/after tests of + * pg_statistic records easier. + */ + if (i_range_bounds_hist > 0) + { + Oid valuestype = types[i_range_bounds_hist]; + + if (valuestype == TEXTOID) + { + + Datum stakind = Int16GetDatum(STATISTIC_KIND_BOUNDS_HISTOGRAM); + Datum staop = ObjectIdGetDatum(InvalidOid); + Datum stacoll = ObjectIdGetDatum(InvalidOid); + Datum strvalue = args[i_range_bounds_hist]; + bool converted = false; + Datum stavalues; + + stavalues = cast_stavalues(&finfo, strvalue, typcache->type_id, + typmod, &converted); + + if (converted && + array_check(stavalues, false, "range_bounds_histogram")) + { + values[Anum_pg_statistic_stakind1 - 1 + k] = stakind; + values[Anum_pg_statistic_staop1 - 1 + k] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + k] = stacoll; + nulls[Anum_pg_statistic_stanumbers1 - 1 + k] = true; + values[Anum_pg_statistic_stavalues1 - 1 + k] = stavalues; + + k++; + } + } + else + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be type %s, ignored", + "range_bounds_histogram", "text"))); + } + + /* + * STATISTIC_KIND_RANGE_LENGTH_HISTOGRAM + * + * range_empty_frac: real range_length_histogram: double + * precision[]::text + */ + if (i_range_length_hist > 0) + { + bool ok = true; + Oid numberstype = types[i_range_empty_frac]; + Oid valuestype = types[i_range_length_hist]; + + if (numberstype != FLOAT4OID) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be type %s, ignored", + "range_empty_frac", "real"))); + ok = false; + } + else if (valuestype != TEXTOID) + { + ereport(WARNING, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("%s must be type %s, ignored", + "range_length_histogram", "text"))); + ok = false; + } + + if (ok) + { + Datum stakind = Int16GetDatum(STATISTIC_KIND_RANGE_LENGTH_HISTOGRAM); + Datum staop = ObjectIdGetDatum(Float8LessOperator); + Datum stacoll = ObjectIdGetDatum(InvalidOid); + + /* The anyarray is always a float8[] for this stakind */ + Datum elem = args[i_range_empty_frac]; + Datum elems[] = {elem}; + ArrayType *arry = construct_array_builtin(elems, 1, FLOAT4OID); + Datum stanumbers = PointerGetDatum(arry); + Datum strvalue = args[i_range_length_hist]; + bool converted = false; + Datum stavalues; + + stavalues = cast_stavalues(&finfo, strvalue, FLOAT8OID, 0, &converted); + + if (converted && + array_check(stavalues, false, "range_length_histogram")) + { + values[Anum_pg_statistic_stakind1 - 1 + k] = stakind; + values[Anum_pg_statistic_staop1 - 1 + k] = staop; + values[Anum_pg_statistic_stacoll1 - 1 + k] = stacoll; + values[Anum_pg_statistic_stanumbers1 - 1 + k] = stanumbers; + values[Anum_pg_statistic_stavalues1 - 1 + k] = stavalues; + + k++; + } + } + } + + /* fill in all remaining slots */ + for (; k < STATISTIC_NUM_SLOTS; k++) + { + values[Anum_pg_statistic_stakind1 - 1 + k] = Int16GetDatum(0); + values[Anum_pg_statistic_staop1 - 1 + k] = ObjectIdGetDatum(InvalidOid); + values[Anum_pg_statistic_stacoll1 - 1 + k] = ObjectIdGetDatum(InvalidOid); + nulls[Anum_pg_statistic_stanumbers1 - 1 + k] = true; + nulls[Anum_pg_statistic_stavalues1 - 1 + k] = true; + } + + update_pg_statistic(values, nulls); + + relation_close(rel, NoLock); + PG_RETURN_BOOL(true); +} diff --git a/src/test/regress/expected/stats_export_import.out b/src/test/regress/expected/stats_export_import.out new file mode 100644 index 0000000000..0ad4f903f4 --- /dev/null +++ b/src/test/regress/expected/stats_export_import.out @@ -0,0 +1,853 @@ +CREATE SCHEMA stats_export_import; +CREATE TYPE stats_export_import.complex_type AS ( + a integer, + b real, + c text, + d date, + e jsonb); +CREATE TABLE stats_export_import.test( + id INTEGER PRIMARY KEY, + name text, + comp stats_export_import.complex_type, + arange int4range, + tags text[] +); +SELECT relpages, reltuples, relallvisible FROM pg_class WHERE oid = 'stats_export_import.test'::regclass; + relpages | reltuples | relallvisible +----------+-----------+--------------- + 0 | -1 | 0 +(1 row) + +-- error: regclass not found +SELECT pg_set_relation_stats('stats_export_import.nope'::regclass, + 150000::integer); +ERROR: relation "stats_export_import.nope" does not exist +LINE 1: SELECT pg_set_relation_stats('stats_export_import.nope'::reg... + ^ +-- error: all three params missing +SELECT pg_set_relation_stats('stats_export_import.test'::regclass, + 150000::integer); +ERROR: function pg_set_relation_stats(regclass, integer) does not exist +LINE 1: SELECT pg_set_relation_stats('stats_export_import.test'::reg... + ^ +HINT: No function matches the given name and argument types. You might need to add explicit type casts. +-- error: reltuples, relallvisible missing +SELECT pg_set_relation_stats('stats_export_import.test'::regclass, + 150000::integer, + 'relpages', 4::integer); +WARNING: required parameter reltuples not set + pg_set_relation_stats +----------------------- + f +(1 row) + +-- error: null value +SELECT pg_set_relation_stats('stats_export_import.test'::regclass, + 150000::integer, + 'relpages', 'nope'::text, + 'reltuples', NULL::real, + 'relallvisible', 4::integer); + pg_set_relation_stats +----------------------- + +(1 row) + +-- error: bad relpages type +SELECT pg_set_relation_stats('stats_export_import.test'::regclass, + 150000::integer, + 'relpages', 'nope'::text, + 'reltuples', 400.0::real, + 'relallvisible', 4::integer); +WARNING: relpages must be of type integer + pg_set_relation_stats +----------------------- + f +(1 row) + +SELECT pg_set_relation_stats('stats_export_import.test'::regclass, + 150000::integer, + 'relpages', 17::integer, + 'reltuples', 400.0::real, + 'relallvisible', 4::integer); + pg_set_relation_stats +----------------------- + t +(1 row) + +SELECT relpages, reltuples, relallvisible +FROM pg_class +WHERE oid = 'stats_export_import.test'::regclass; + relpages | reltuples | relallvisible +----------+-----------+--------------- + 17 | 400 | 4 +(1 row) + +-- error: object doesn't exist +SELECT pg_catalog.pg_set_attribute_stats( + '0'::oid, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', 2::integer, + 'n_distinct', 0.3::real); +ERROR: could not open relation with OID 0 +-- error: relation null +SELECT pg_catalog.pg_set_attribute_stats( + NULL::oid, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', 2::integer, + 'n_distinct', 0.3::real); + pg_set_attribute_stats +------------------------ + +(1 row) + +-- error: attname null +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + NULL::name, + false::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', 2::integer, + 'n_distinct', 0.3::real); + pg_set_attribute_stats +------------------------ + +(1 row) + +-- error: inherited null +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + NULL::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', 2::integer, + 'n_distinct', 0.3::real); + pg_set_attribute_stats +------------------------ + +(1 row) + +-- error: null_frac null +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', NULL::real, + 'avg_width', 2::integer, + 'n_distinct', 0.3::real); + pg_set_attribute_stats +------------------------ + +(1 row) + +-- error: avg_width null +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', NULL::integer, + 'n_distinct', 0.3::real); + pg_set_attribute_stats +------------------------ + +(1 row) + +-- error: avg_width null +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', 2::integer, + 'n_distinct', NULL::real); + pg_set_attribute_stats +------------------------ + +(1 row) + +-- ok: no stakinds +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', 2::integer, + 'n_distinct', 0.3::real); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT stanullfrac, stawidth, stadistinct +FROM pg_statistic +WHERE starelid = 'stats_export_import.test'::regclass; + stanullfrac | stawidth | stadistinct +-------------+----------+------------- + 0.1 | 2 | 0.3 +(1 row) + +-- warn: mcv / mcf null mismatch +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_freqs', '{0.1,0.2,0.3}'::real[] + ); +WARNING: most_common_freqs cannot be present if most_common_vals is missing + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- warn: mcv / mcf null mismatch part 2 +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_vals', '{1,2,3}'::text + ); +WARNING: most_common_vals cannot be present if most_common_freqs is missing + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- warn: mcv / mcf type mismatch +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_vals', '{2,1,3}'::text, + 'most_common_freqs', '{0.2,0.1}'::double precision[] + ); +WARNING: most_common_freqs must be type real[], ignored + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- warning: mcv cast failure +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_vals', '{2,four,3}'::text, + 'most_common_freqs', '{0.3,0.25,0.05}'::real[] + ); +WARNING: invalid input syntax for type integer: "four" + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- ok: mcv+mcf +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_vals', '{2,1,3}'::text, + 'most_common_freqs', '{0.3,0.25,0.05}'::real[] + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'id'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+----------------------+------------------------+------------------+------------------------ + stats_export_import | test | id | f | 0.5 | 2 | -0.1 | {2,1,3} | {0.3,0.25,0.05} | | | | | | | | +(1 row) + +-- warn: histogram elements null value +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'histogram_bounds', '{1,NULL,3,4}'::text + ); +WARNING: histogram_bounds array cannot contain NULL values + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- ok: histogram_bounds +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'histogram_bounds', '{1,2,3,4}'::text + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'id'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+----------------------+------------------------+------------------+------------------------ + stats_export_import | test | id | f | 0.5 | 2 | -0.1 | | | {1,2,3,4} | | | | | | | +(1 row) + +-- ok: correlation +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'correlation', 0.5::real); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'id'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+----------------------+------------------------+------------------+------------------------ + stats_export_import | test | id | f | 0.5 | 2 | -0.1 | | | | 0.5 | | | | | | +(1 row) + +-- warn: scalars can't have mcelem +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_elems', '{1,3}'::text, + 'most_common_elem_freqs', '{0.3,0.2,0.2,0.3,0.0}'::real[] + ); +WARNING: id cannot accept most_common_elems stats, ignored +WARNING: id cannot accept most_common_elem_freqs stats, ignored + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- warn: mcelem / mcelem mismatch +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'tags'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_elems', '{one,two}'::text + ); +WARNING: most_common_elems cannot be present if most_common_elem_freqs is missing + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- warn: mcelem / mcelem null mismatch part 2 +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'tags'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_elem_freqs', '{0.3,0.2,0.2,0.3}'::real[] + ); +WARNING: most_common_elem_freqs cannot be present if most_common_elems is missing + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- ok: mcelem +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'tags'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_elems', '{one,three}'::text, + 'most_common_elem_freqs', '{0.3,0.2,0.2,0.3,0.0}'::real[] + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'tags'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+----------------------+------------------------+------------------+------------------------ + stats_export_import | test | tags | f | 0.5 | 2 | -0.1 | | | | | {one,three} | {0.3,0.2,0.2,0.3,0} | | | | +(1 row) + +-- warn: scalars can't have elem_count_histogram +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'elem_count_histogram', '{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[] + ); +WARNING: id cannot accept elem_count_histogram stats, ignored + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- warn: elem_count_histogram null element +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'tags'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'elem_count_histogram', '{1,1,NULL,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[] + ); +WARNING: elem_count_histogram array cannot contain NULL values + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- ok: elem_count_histogram +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'tags'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'elem_count_histogram', '{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[] + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'tags'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------------------+------------------+------------------------ + stats_export_import | test | tags | f | 0.5 | 2 | -0.1 | | | | | | | {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1} | | | +(1 row) + +-- warn: scalars can't have range stats +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'range_empty_frac', 0.5::real, + 'range_length_histogram', '{399,499,Infinity}'::text + ); +WARNING: id cannot accept range_length_histogram stats, ignored +WARNING: id cannot accept range_empty_frac stats, ignored + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- warn: range_empty_frac range_length_hist null mismatch +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'arange'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'range_length_histogram', '{399,499,Infinity}'::text + ); +WARNING: range_length_histogram cannot be present if range_empty_frac is missing + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- warn: range_empty_frac range_length_hist null mismatch part 2 +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'arange'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'range_empty_frac', 0.5::real + ); +WARNING: range_empty_frac cannot be present if range_length_histogram is missing + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- ok: range_empty_frac + range_length_hist +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'arange'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'range_empty_frac', 0.5::real, + 'range_length_histogram', '{399,499,Infinity}'::text + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'arange'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+----------------------+------------------------+------------------+------------------------ + stats_export_import | test | arange | f | 0.5 | 2 | -0.1 | | | | | | | | {399,499,Infinity} | 0.5 | +(1 row) + +-- warn: scalars can't have range stats +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'range_bounds_histogram', '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text + ); +WARNING: id cannot accept range_bounds_histogram stats, ignored + pg_set_attribute_stats +------------------------ + t +(1 row) + +-- ok: range_bounds_histogram +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'arange'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'range_bounds_histogram', '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text + ); + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'arange'; + schemaname | tablename | attname | inherited | null_frac | avg_width | n_distinct | most_common_vals | most_common_freqs | histogram_bounds | correlation | most_common_elems | most_common_elem_freqs | elem_count_histogram | range_length_histogram | range_empty_frac | range_bounds_histogram +---------------------+-----------+---------+-----------+-----------+-----------+------------+------------------+-------------------+------------------+-------------+-------------------+------------------------+----------------------+------------------------+------------------+-------------------------------------- + stats_export_import | test | arange | f | 0.5 | 2 | -0.1 | | | | | | | | | | {"[-1,1)","[0,4)","[1,4)","[1,100)"} +(1 row) + +-- warn: exceed STATISTIC_NUM_SLOTS +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'arange'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_vals', '{2,1,3}'::text, + 'most_common_freqs', '{0.3,0.25,0.05}'::real[], + 'histogram_bounds', '{1,2,3,4}'::text, + 'correlation', 1.1::real, + 'most_common_elems', '{3,1}'::text, + 'most_common_elem_freqs', '{0.3,0.2,0.2,0.3,0.0}'::real[], + 'range_empty_frac', -0.5::real, + 'range_length_histogram', '{399,499,Infinity}'::text, + 'range_bounds_histogram', '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text + ); +WARNING: imported statistics must have a maximum of 5 slots but 6 given + pg_set_attribute_stats +------------------------ + f +(1 row) + +-- +-- Test the ability to exactly copy data from one table to an identical table, +-- correctly reconstructing the stakind order as well as the staopN and +-- stacollN values. Because oids are not stable across databases, we can only +-- test this when the source and destination are on the same database +-- instance. For that reason, we borrow and adapt a query found in fe_utils +-- and used by pg_dump/pg_upgrade. +-- +INSERT INTO stats_export_import.test +SELECT 1, 'one', (1, 1.1, 'ONE', '2001-01-01', '{ "xkey": "xval" }')::stats_export_import.complex_type, int4range(1,4), array['red','green'] +UNION ALL +SELECT 2, 'two', (2, 2.2, 'TWO', '2002-02-02', '[true, 4, "six"]')::stats_export_import.complex_type, int4range(1,4), array['blue','yellow'] +UNION ALL +SELECT 3, 'tre', (3, 3.3, 'TRE', '2003-03-03', NULL)::stats_export_import.complex_type, int4range(-1,1), array['"orange"', 'purple', 'cyan'] +UNION ALL +SELECT 4, 'four', NULL, int4range(0,100), NULL; +CREATE INDEX is_odd ON stats_export_import.test(((comp).a % 2 = 1)); +-- Generate statistics on table with data +ANALYZE stats_export_import.test; +CREATE TABLE stats_export_import.test_clone ( LIKE stats_export_import.test ); +CREATE INDEX is_odd_clone ON stats_export_import.test_clone(((comp).a % 2 = 1)); +-- +-- Turn off ECHO for the transfer, because the actual stats generated by +-- ANALYZE could change, and we don't care about the actual stats, we care +-- about the ability to transfer them to another relation. +-- +\set orig_ECHO :ECHO +\set ECHO none + pg_set_attribute_stats +------------------------ + t +(1 row) + + pg_set_attribute_stats +------------------------ + t +(1 row) + + pg_set_attribute_stats +------------------------ + t +(1 row) + + pg_set_attribute_stats +------------------------ + t +(1 row) + + pg_set_attribute_stats +------------------------ + t +(1 row) + + pg_set_attribute_stats +------------------------ + t +(1 row) + +SELECT c.relname, COUNT(*) AS num_stats +FROM pg_class AS c +JOIN pg_statistic s ON s.starelid = c.oid +WHERE c.relnamespace = 'stats_export_import'::regnamespace +AND c.relname IN ('test', 'test_clone', 'is_odd', 'is_odd_clone') +GROUP BY c.relname +ORDER BY c.relname; + relname | num_stats +--------------+----------- + is_odd | 1 + is_odd_clone | 1 + test | 5 + test_clone | 5 +(4 rows) + +-- check test minus test_clone +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test_clone'::regclass; + attname | stainherit | stanullfrac | stawidth | stadistinct | stakind1 | stakind2 | stakind3 | stakind4 | stakind5 | staop1 | staop2 | staop3 | staop4 | staop5 | stacoll1 | stacoll2 | stacoll3 | stacoll4 | stacoll5 | stanumbers1 | stanumbers2 | stanumbers3 | stanumbers4 | stanumbers5 | sv1 | sv2 | sv3 | sv4 | sv5 | direction +---------+------------+-------------+----------+-------------+----------+----------+----------+----------+----------+--------+--------+--------+--------+--------+----------+----------+----------+----------+----------+-------------+-------------+-------------+-------------+-------------+-----+-----+-----+-----+-----+----------- +(0 rows) + +-- check test_clone minus test +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test_clone'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test'::regclass; + attname | stainherit | stanullfrac | stawidth | stadistinct | stakind1 | stakind2 | stakind3 | stakind4 | stakind5 | staop1 | staop2 | staop3 | staop4 | staop5 | stacoll1 | stacoll2 | stacoll3 | stacoll4 | stacoll5 | stanumbers1 | stanumbers2 | stanumbers3 | stanumbers4 | stanumbers5 | sv1 | sv2 | sv3 | sv4 | sv5 | direction +---------+------------+-------------+----------+-------------+----------+----------+----------+----------+----------+--------+--------+--------+--------+--------+----------+----------+----------+----------+----------+-------------+-------------+-------------+-------------+-------------+-----+-----+-----+-----+-----+----------- +(0 rows) + +-- check is_odd minus is_odd_clone +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd_clone'::regclass; + attname | stainherit | stanullfrac | stawidth | stadistinct | stakind1 | stakind2 | stakind3 | stakind4 | stakind5 | staop1 | staop2 | staop3 | staop4 | staop5 | stacoll1 | stacoll2 | stacoll3 | stacoll4 | stacoll5 | stanumbers1 | stanumbers2 | stanumbers3 | stanumbers4 | stanumbers5 | sv1 | sv2 | sv3 | sv4 | sv5 | direction +---------+------------+-------------+----------+-------------+----------+----------+----------+----------+----------+--------+--------+--------+--------+--------+----------+----------+----------+----------+----------+-------------+-------------+-------------+-------------+-------------+-----+-----+-----+-----+-----+----------- +(0 rows) + +-- check is_odd_clone minus is_odd +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd_clone'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd'::regclass; + attname | stainherit | stanullfrac | stawidth | stadistinct | stakind1 | stakind2 | stakind3 | stakind4 | stakind5 | staop1 | staop2 | staop3 | staop4 | staop5 | stacoll1 | stacoll2 | stacoll3 | stacoll4 | stacoll5 | stanumbers1 | stanumbers2 | stanumbers3 | stanumbers4 | stanumbers5 | sv1 | sv2 | sv3 | sv4 | sv5 | direction +---------+------------+-------------+----------+-------------+----------+----------+----------+----------+----------+--------+--------+--------+--------+--------+----------+----------+----------+----------+----------+-------------+-------------+-------------+-------------+-------------+-----+-----+-----+-----+-----+----------- +(0 rows) + diff --git a/src/test/regress/parallel_schedule b/src/test/regress/parallel_schedule index 5ac6e871f5..a7a4dfd411 100644 --- a/src/test/regress/parallel_schedule +++ b/src/test/regress/parallel_schedule @@ -28,7 +28,8 @@ test: strings md5 numerology point lseg line box path polygon circle date time t # geometry depends on point, lseg, line, box, path, polygon, circle # horology depends on date, time, timetz, timestamp, timestamptz, interval # ---------- -test: geometry horology tstypes regex type_sanity opr_sanity misc_sanity comments expressions unicode xid mvcc +test: geometry horology tstypes regex type_sanity opr_sanity misc_sanity comments expressions unicode xid mvcc stats_export_import + # ---------- # Load huge amounts of data diff --git a/src/test/regress/sql/stats_export_import.sql b/src/test/regress/sql/stats_export_import.sql new file mode 100644 index 0000000000..ebdb58aba1 --- /dev/null +++ b/src/test/regress/sql/stats_export_import.sql @@ -0,0 +1,671 @@ +CREATE SCHEMA stats_export_import; + +CREATE TYPE stats_export_import.complex_type AS ( + a integer, + b real, + c text, + d date, + e jsonb); + +CREATE TABLE stats_export_import.test( + id INTEGER PRIMARY KEY, + name text, + comp stats_export_import.complex_type, + arange int4range, + tags text[] +); + +SELECT relpages, reltuples, relallvisible FROM pg_class WHERE oid = 'stats_export_import.test'::regclass; + +-- error: regclass not found +SELECT pg_set_relation_stats('stats_export_import.nope'::regclass, + 150000::integer); + +-- error: all three params missing +SELECT pg_set_relation_stats('stats_export_import.test'::regclass, + 150000::integer); + +-- error: reltuples, relallvisible missing +SELECT pg_set_relation_stats('stats_export_import.test'::regclass, + 150000::integer, + 'relpages', 4::integer); + +-- error: null value +SELECT pg_set_relation_stats('stats_export_import.test'::regclass, + 150000::integer, + 'relpages', 'nope'::text, + 'reltuples', NULL::real, + 'relallvisible', 4::integer); + +-- error: bad relpages type +SELECT pg_set_relation_stats('stats_export_import.test'::regclass, + 150000::integer, + 'relpages', 'nope'::text, + 'reltuples', 400.0::real, + 'relallvisible', 4::integer); + +SELECT pg_set_relation_stats('stats_export_import.test'::regclass, + 150000::integer, + 'relpages', 17::integer, + 'reltuples', 400.0::real, + 'relallvisible', 4::integer); + +SELECT relpages, reltuples, relallvisible +FROM pg_class +WHERE oid = 'stats_export_import.test'::regclass; + +-- error: object doesn't exist +SELECT pg_catalog.pg_set_attribute_stats( + '0'::oid, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', 2::integer, + 'n_distinct', 0.3::real); + +-- error: relation null +SELECT pg_catalog.pg_set_attribute_stats( + NULL::oid, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', 2::integer, + 'n_distinct', 0.3::real); + +-- error: attname null +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + NULL::name, + false::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', 2::integer, + 'n_distinct', 0.3::real); + +-- error: inherited null +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + NULL::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', 2::integer, + 'n_distinct', 0.3::real); + +-- error: null_frac null +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', NULL::real, + 'avg_width', 2::integer, + 'n_distinct', 0.3::real); + +-- error: avg_width null +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', NULL::integer, + 'n_distinct', 0.3::real); + +-- error: avg_width null +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', 2::integer, + 'n_distinct', NULL::real); + +-- ok: no stakinds +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.1::real, + 'avg_width', 2::integer, + 'n_distinct', 0.3::real); + +SELECT stanullfrac, stawidth, stadistinct +FROM pg_statistic +WHERE starelid = 'stats_export_import.test'::regclass; + +-- warn: mcv / mcf null mismatch +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_freqs', '{0.1,0.2,0.3}'::real[] + ); + +-- warn: mcv / mcf null mismatch part 2 +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_vals', '{1,2,3}'::text + ); + +-- warn: mcv / mcf type mismatch +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_vals', '{2,1,3}'::text, + 'most_common_freqs', '{0.2,0.1}'::double precision[] + ); + +-- warning: mcv cast failure +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_vals', '{2,four,3}'::text, + 'most_common_freqs', '{0.3,0.25,0.05}'::real[] + ); + +-- ok: mcv+mcf +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_vals', '{2,1,3}'::text, + 'most_common_freqs', '{0.3,0.25,0.05}'::real[] + ); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'id'; + +-- warn: histogram elements null value +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'histogram_bounds', '{1,NULL,3,4}'::text + ); + +-- ok: histogram_bounds +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'histogram_bounds', '{1,2,3,4}'::text + ); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'id'; + +-- ok: correlation +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'correlation', 0.5::real); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'id'; + +-- warn: scalars can't have mcelem +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_elems', '{1,3}'::text, + 'most_common_elem_freqs', '{0.3,0.2,0.2,0.3,0.0}'::real[] + ); + +-- warn: mcelem / mcelem mismatch +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'tags'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_elems', '{one,two}'::text + ); + +-- warn: mcelem / mcelem null mismatch part 2 +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'tags'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_elem_freqs', '{0.3,0.2,0.2,0.3}'::real[] + ); + +-- ok: mcelem +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'tags'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_elems', '{one,three}'::text, + 'most_common_elem_freqs', '{0.3,0.2,0.2,0.3,0.0}'::real[] + ); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'tags'; + +-- warn: scalars can't have elem_count_histogram +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'elem_count_histogram', '{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[] + ); +-- warn: elem_count_histogram null element +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'tags'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'elem_count_histogram', '{1,1,NULL,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[] + ); +-- ok: elem_count_histogram +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'tags'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'elem_count_histogram', '{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}'::real[] + ); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'tags'; + +-- warn: scalars can't have range stats +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'range_empty_frac', 0.5::real, + 'range_length_histogram', '{399,499,Infinity}'::text + ); +-- warn: range_empty_frac range_length_hist null mismatch +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'arange'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'range_length_histogram', '{399,499,Infinity}'::text + ); +-- warn: range_empty_frac range_length_hist null mismatch part 2 +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'arange'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'range_empty_frac', 0.5::real + ); +-- ok: range_empty_frac + range_length_hist +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'arange'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'range_empty_frac', 0.5::real, + 'range_length_histogram', '{399,499,Infinity}'::text + ); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'arange'; + +-- warn: scalars can't have range stats +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'id'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'range_bounds_histogram', '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text + ); +-- ok: range_bounds_histogram +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'arange'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'range_bounds_histogram', '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text + ); + +SELECT * +FROM pg_stats +WHERE schemaname = 'stats_export_import' +AND tablename = 'test' +AND inherited = false +AND attname = 'arange'; + +-- warn: exceed STATISTIC_NUM_SLOTS +SELECT pg_catalog.pg_set_attribute_stats( + 'stats_export_import.test'::regclass, + 'arange'::name, + false::boolean, + 150000::integer, + 'null_frac', 0.5::real, + 'avg_width', 2::integer, + 'n_distinct', -0.1::real, + 'most_common_vals', '{2,1,3}'::text, + 'most_common_freqs', '{0.3,0.25,0.05}'::real[], + 'histogram_bounds', '{1,2,3,4}'::text, + 'correlation', 1.1::real, + 'most_common_elems', '{3,1}'::text, + 'most_common_elem_freqs', '{0.3,0.2,0.2,0.3,0.0}'::real[], + 'range_empty_frac', -0.5::real, + 'range_length_histogram', '{399,499,Infinity}'::text, + 'range_bounds_histogram', '{"[-1,1)","[0,4)","[1,4)","[1,100)"}'::text + ); +-- +-- Test the ability to exactly copy data from one table to an identical table, +-- correctly reconstructing the stakind order as well as the staopN and +-- stacollN values. Because oids are not stable across databases, we can only +-- test this when the source and destination are on the same database +-- instance. For that reason, we borrow and adapt a query found in fe_utils +-- and used by pg_dump/pg_upgrade. +-- +INSERT INTO stats_export_import.test +SELECT 1, 'one', (1, 1.1, 'ONE', '2001-01-01', '{ "xkey": "xval" }')::stats_export_import.complex_type, int4range(1,4), array['red','green'] +UNION ALL +SELECT 2, 'two', (2, 2.2, 'TWO', '2002-02-02', '[true, 4, "six"]')::stats_export_import.complex_type, int4range(1,4), array['blue','yellow'] +UNION ALL +SELECT 3, 'tre', (3, 3.3, 'TRE', '2003-03-03', NULL)::stats_export_import.complex_type, int4range(-1,1), array['"orange"', 'purple', 'cyan'] +UNION ALL +SELECT 4, 'four', NULL, int4range(0,100), NULL; + +CREATE INDEX is_odd ON stats_export_import.test(((comp).a % 2 = 1)); + +-- Generate statistics on table with data +ANALYZE stats_export_import.test; + +CREATE TABLE stats_export_import.test_clone ( LIKE stats_export_import.test ); + +CREATE INDEX is_odd_clone ON stats_export_import.test_clone(((comp).a % 2 = 1)); + +-- +-- Turn off ECHO for the transfer, because the actual stats generated by +-- ANALYZE could change, and we don't care about the actual stats, we care +-- about the ability to transfer them to another relation. +-- +\set orig_ECHO :ECHO +\set ECHO none + +SELECT + format('SELECT pg_catalog.pg_set_attribute_stats( ' + || '%L::regclass::oid, ' + || '%L::name, ' + || '%L::boolean, ' + || '%L::integer, ' + || '%L, %L::real, ' + || '%L, %L::integer, ' + || '%L, %L::real %s)', + 'stats_export_import.' || s.tablename || '_clone', + s.attname, + s.inherited, + 150000, + 'null_frac', s.null_frac, + 'avg_width', s.avg_width, + 'n_distinct', s.n_distinct, + CASE + WHEN s.most_common_vals IS NULL THEN '' + ELSE format(', %L, %L::text, %L, %L::real[]', + 'most_common_vals', s.most_common_vals, + 'most_common_freqs', s.most_common_freqs) + END || + CASE + WHEN s.histogram_bounds IS NULL THEN '' + ELSE format(', %L, %L::text', + 'histogram_bounds', s.histogram_bounds) + END || + CASE + WHEN s.correlation IS NULL THEN '' + ELSE format(', %L, %L::real', + 'correlation', s.correlation) + END || + CASE + WHEN s.most_common_elems IS NULL THEN '' + ELSE format(', %L, %L::text, %L, %L::real[]', + 'most_common_elems', s.most_common_elems, + 'most_common_elem_freqs', s.most_common_elem_freqs) + END || + CASE + WHEN s.elem_count_histogram IS NULL THEN '' + ELSE format(', %L, %L::real[]', + 'elem_count_histogram', s.elem_count_histogram) + END || + CASE + WHEN s.range_bounds_histogram IS NULL THEN '' + ELSE format(', %L, %L::text', + 'range_bounds_histogram', s.range_bounds_histogram) + END || + CASE + WHEN s.range_empty_frac IS NULL THEN '' + ELSE format(', %L, %L::real, %L, %L::text', + 'range_empty_frac', s.range_empty_frac, + 'range_length_histogram', s.range_length_histogram) + END) +FROM pg_catalog.pg_stats AS s +WHERE s.schemaname = 'stats_export_import' +AND s.tablename IN ('test', 'is_odd') +\gexec + +-- restore ECHO to original value +\set ECHO :orig_ECHO + +SELECT c.relname, COUNT(*) AS num_stats +FROM pg_class AS c +JOIN pg_statistic s ON s.starelid = c.oid +WHERE c.relnamespace = 'stats_export_import'::regnamespace +AND c.relname IN ('test', 'test_clone', 'is_odd', 'is_odd_clone') +GROUP BY c.relname +ORDER BY c.relname; + +-- check test minus test_clone +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test_clone'::regclass; + +-- check test_clone minus test +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test_clone'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'test_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.test'::regclass; + +-- check is_odd minus is_odd_clone +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd_clone'::regclass; + +-- check is_odd_clone minus is_odd +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd_clone'::regclass +EXCEPT +SELECT + a.attname, s.stainherit, s.stanullfrac, s.stawidth, s.stadistinct, + s.stakind1, s.stakind2, s.stakind3, s.stakind4, s.stakind5, + s.staop1, s.staop2, s.staop3, s.staop4, s.staop5, + s.stacoll1, s.stacoll2, s.stacoll3, s.stacoll4, s.stacoll5, + s.stanumbers1, s.stanumbers2, s.stanumbers3, s.stanumbers4, s.stanumbers5, + s.stavalues1::text AS sv1, s.stavalues2::text AS sv2, + s.stavalues3::text AS sv3, s.stavalues4::text AS sv4, + s.stavalues5::text AS sv5, 'is_odd_clone' AS direction +FROM pg_statistic s +JOIN pg_attribute a ON a.attrelid = s.starelid AND a.attnum = s.staattnum +WHERE s.starelid = 'stats_export_import.is_odd'::regclass; diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml index 192959ebc1..786832232a 100644 --- a/doc/src/sgml/func.sgml +++ b/doc/src/sgml/func.sgml @@ -29260,6 +29260,273 @@ DETAIL: Make sure pg_wal_replay_wait() isn't called within a transaction, anoth in identifying the specific disk files associated with database objects. + + Database Object Statistics Import Functions + + + + + Function + + + Description + + + + + + + + + pg_set_relation_stats + + pg_set_relation_stats ( + relation regclass, + version integer, + VARIADIC stats "any" ) + boolean + + + Updates the pg_class row for the specified + relation, values from the variadic list of + name-value pairs. Each parameter name corresponds to the same-named + attribute in pg_class: + + + + relpages + + + Must be followed by a parameter of type integer. + This parameter is currently required. + + + + + reltuples + + + Must be followed by a parameter of type real. + This parameter is currently required. + + + + + relalltuples + + + Must be followed by a parameter of type integer. + This parameter is currently required. + + + + + + Any other parameter names given must also have a value pair, but will emit + a warning and thereafter be ignored. + + + The version is meant to reflect the server version + number of the system where this data was generated, as that may in the + future change how the data is imported. + + + To avoid table bloat in pg_class, this change + is made with an in-place update, and therefore cannot be rolled back + through normal transaction processing. + + + This function mimics the behavior of ANALYZE in its + effects on the values in pg_class, except that + the values are supplied as parameters rather than derived from table + sampling. + + + The caller must either be the owner of the relation, or have superuser + privileges. + + + The parameters given are checked for type validity and must all be + NOT NULL. + + + The parameters will return true if stats were updated and false if not. + + + + + pg_set_attribute_stats + + pg_set_attribute_stats ( + relation regclass + , attname name + , inherited boolean + , version integer + , VARIADIC stats "any" ) + boolean + + + Replaces the pg_statistic row for the + pg_attribute row specified by + relation, attname + and inherited. The version + should be set to the server version number of the server where + the variadic stats originated, as it may in the + future affect how the stats are imported. Values from the variadic + list form name-value pairs. Each parameter name corresponds to the + same-named attribute in + pg_stats: + + + + null_frac + + + Must be followed by a parameter of type real. + This parameter is currently required. + + + + + avg_width + + + Must be followed by a parameter of type integer. + This parameter is currently required. + + + + + n_distinct + + + Must be followed by a parameter of type real. + This parameter is currently required. + + + + + most_common_vals + + + most_common_vals + Must be followed by a parameter of type text. If this + parameter is specified then most_common_freqs + must also be specified. + + + + + most_common_freqs + + + Must be followed by a parameter of real[], and can only + be specified if most_common_vals is also specified. + + + + + histogram_bounds + + + Must be followed by a parameter of type text. + + + + + correlation + + + Must be followed by a parameter of type real. + + + + + most_common_elems + + + Must be followed by a parameter of type text. If this + parameter is specified then most_common_elem_freqs + must also be specified. + + + + + most_common_elem_freqs + + + Must be followed by a parameter of type real[], and can + only be specified if most_common_elems is also + specified. + + + + + elem_count_histogram + + + Must be followed by a parameter of type real[]. + + + + + range_length_histogram + + + Must be followed by a parameter of type text. If this + parameter is specified then range_empty_frac + must also be specified. + + + + + range_empty_frac + + + Must be followed by a parameter of type real, and can + only be specified if range_length_histogram + is also specified. + + + + + range_bounds_histogram + + + Must be followed by a parameter of type text + + + + + + Any other parameter names given must also have a value pair, but will emit + a warning and thereafter be ignored. + + + The parameters will return true if stats were updated and false if not. + + + This function mimics the behavior of ANALYZE in its + effects on the values in pg_statistic, except + that the values are supplied as parameters rather than derived from + table sampling. + + + The purpose of this function is to apply statistics values in an + upgrade situation that are "good enough" for system operation until + they are replaced by the next ANALYZE, usually via + autovacuum. + + + The caller must either be the owner of the relation, or have superuser + privileges. + + + + + +
+ Database Object Location Functions -- 2.44.0