Re: [HACKERS] logging statement levels

Andrew Dunstan wrote:
> >>Here are some options:
> >>
> >>1. change the type of "log_statement" option from boolean to string,
> >>with allowed values of "all, mod, ddl, none" with default "none".
> >>2. same as 1. but make boolean true values synonyms for "all" and
> >>boolean false values synonyms for "none".
> >>3. keep "log_statement" option as now and add a new option
> >>"log_statement_level" with the same options as 1. but default to "all",
> >>which will have no effect unless "log_statement" is true.
> >>
> >>
> >
> >I like 1.

OK, here is a patch that implements #1. Here is sample output:

test=> set client_min_messages = 'log';
SET
test=> set log_statement = 'mod';
SET
test=> select 1;
?column?
----------
1
(1 row)

test=> update test set x=1;
LOG: statement: update test set x=1;
ERROR: relation "test" does not exist
test=> update test set x=1;
LOG: statement: update test set x=1;
ERROR: relation "test" does not exist
test=> copy test from '/tmp/x';
LOG: statement: copy test from '/tmp/x';
ERROR: relation "test" does not exist
test=> copy test to '/tmp/x';
ERROR: relation "test" does not exist
test=> prepare xx as select 1;
PREPARE
test=> prepare xx as update x set y=1;
LOG: statement: prepare xx as update x set y=1;
ERROR: relation "x" does not exist
test=> explain analyze select 1;;
QUERY PLAN
------------------------------------------------------------------------------------
Result (cost=0.00..0.01 rows=1 width=0) (actual time=0.006..0.007 rows=1 loops=1)
Total runtime: 0.046 ms
(2 rows)

test=> explain analyze update test set x=1;
LOG: statement: explain analyze update test set x=1;
ERROR: relation "test" does not exist
test=> explain update test set x=1;
ERROR: relation "test" does not exist

It checks PREPARE and EXECUTE ANALYZE too. The log_statement values are
'none', 'mod', 'ddl', and 'all'. For 'all', it prints before the query
is parsed, and for ddl/mod, it does it right after parsing using the
node tag (or command tag for CREATE/ALTER/DROP), so any non-parse errors
will print after the log line.

--
Bruce Momjian | http://candle.pha.pa.us
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