Index: src/backend/catalog/information_schema.sql
===================================================================
RCS file: /cvsroot/pgsql-server/src/backend/catalog/information_schema.sql,v
retrieving revision 1.21
diff -c -r1.21 information_schema.sql
*** src/backend/catalog/information_schema.sql	17 Dec 2003 22:11:30 -0000	1.21
--- src/backend/catalog/information_schema.sql	29 Jan 2004 00:38:48 -0000
***************
*** 399,415 ****
  CREATE FUNCTION _pg_keypositions() RETURNS SETOF integer
      LANGUAGE sql
      IMMUTABLE
!     AS 'select 1 union all select 2 union all select 3 union all
!         select 4 union all select 5 union all select 6 union all
!         select 7 union all select 8 union all select 9 union all
!         select 10 union all select 11 union all select 12 union all
!         select 13 union all select 14 union all select 15 union all
!         select 16 union all select 17 union all select 18 union all
!         select 19 union all select 20 union all select 21 union all
!         select 22 union all select 23 union all select 24 union all
!         select 25 union all select 26 union all select 27 union all
!         select 28 union all select 29 union all select 30 union all
!         select 31 union all select 32';
  
  CREATE VIEW constraint_column_usage AS
      SELECT CAST(current_database() AS sql_identifier) AS table_catalog,
--- 399,407 ----
  CREATE FUNCTION _pg_keypositions() RETURNS SETOF integer
      LANGUAGE sql
      IMMUTABLE
!     AS 'select g.s
!         from pg_generate(1,(select setting from pg_settings where name = ''max_index_keys'')::int)
!         as g(s);';
  
  CREATE VIEW constraint_column_usage AS
      SELECT CAST(current_database() AS sql_identifier) AS table_catalog,
Index: src/backend/utils/adt/int.c
===================================================================
RCS file: /cvsroot/pgsql-server/src/backend/utils/adt/int.c,v
retrieving revision 1.59
diff -c -r1.59 int.c
*** src/backend/utils/adt/int.c	1 Dec 2003 21:52:37 -0000	1.59
--- src/backend/utils/adt/int.c	29 Jan 2004 00:38:48 -0000
***************
*** 34,39 ****
--- 34,40 ----
  #include <ctype.h>
  #include <limits.h>
  
+ #include "funcapi.h"
  #include "libpq/pqformat.h"
  #include "utils/builtins.h"
  
***************
*** 1021,1023 ****
--- 1022,1088 ----
  
  	PG_RETURN_INT16(arg1 >> arg2);
  }
+ 
+ /*
+  * non-persistent numeric sequence generator
+  */
+ Datum
+ generate_int(PG_FUNCTION_ARGS)
+ {
+ 	FuncCallContext	   *funcctx;
+ 	int32			   *fctx;
+ 	int32				result;
+ 	MemoryContext		oldcontext;
+ 
+ 	/* stuff done only on the first call of the function */
+ 	if (SRF_IS_FIRSTCALL())
+ 	{
+ 		int32			start = PG_GETARG_INT32(0);
+ 		int32			finish = PG_GETARG_INT32(1);
+ 
+ 		if (finish < start)
+ 			ereport(ERROR,
+ 					(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ 					 errmsg("finish is less than start")));
+ 
+ 		/* create a function context for cross-call persistence */
+ 		funcctx = SRF_FIRSTCALL_INIT();
+ 
+ 		/*
+ 		 * switch to memory context appropriate for multiple function
+ 		 * calls
+ 		 */
+ 		oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+ 
+ 		/* total number of tuples to be returned */
+ 		funcctx->max_calls = finish - start + 1;
+ 
+ 		/* allocate memory for user context */
+ 		fctx = (int32 *) palloc(sizeof(int32));
+ 
+ 		/*
+ 		 * Use fctx to keep track of upper and lower bounds from call to
+ 		 * call. It will also be used to carry over the spare value we get
+ 		 * from the Box-Muller algorithm so that we only actually
+ 		 * calculate a new value every other call.
+ 		 */
+ 		*fctx = start;
+ 		funcctx->user_fctx = fctx;
+ 
+ 		MemoryContextSwitchTo(oldcontext);
+ 	}
+ 
+ 	/* stuff done on every call of the function */
+ 	funcctx = SRF_PERCALL_SETUP();
+ 
+ 	fctx = funcctx->user_fctx;
+ 	result = (*fctx)++;
+ 
+ 	if (funcctx->call_cntr < funcctx->max_calls)
+ 		/* do when there is more left to send */
+ 		SRF_RETURN_NEXT(funcctx, Int32GetDatum(result));
+ 	else
+ 		/* do when there is no more left */
+ 		SRF_RETURN_DONE(funcctx);
+ }
+ 
Index: src/include/catalog/pg_proc.h
===================================================================
RCS file: /cvsroot/pgsql-server/src/include/catalog/pg_proc.h,v
retrieving revision 1.318
diff -c -r1.318 pg_proc.h
*** src/include/catalog/pg_proc.h	6 Jan 2004 23:55:19 -0000	1.318
--- src/include/catalog/pg_proc.h	29 Jan 2004 00:38:49 -0000
***************
*** 3424,3429 ****
--- 3424,3433 ----
  DATA(insert OID = 2509 (  pg_get_expr		   PGNSP PGUID 12 f f t f s 3 25 "25 26 16" _null_ pg_get_expr_ext - _null_ ));
  DESCR("deparse an encoded expression with pretty-print option");
  
+ /* non-persistent sequence generator */
+ DATA(insert OID = 1079 (  pg_generate		   PGNSP PGUID 12 f f t t v 2 23 "23 23" _null_ generate_int - _null_ ));
+ DESCR("non-persistent sequence generator");
+ 
  
  /*
   * Symbolic values for provolatile column: these indicate whether the result
Index: src/include/utils/builtins.h
===================================================================
RCS file: /cvsroot/pgsql-server/src/include/utils/builtins.h,v
retrieving revision 1.233
diff -c -r1.233 builtins.h
*** src/include/utils/builtins.h	19 Jan 2004 19:04:40 -0000	1.233
--- src/include/utils/builtins.h	29 Jan 2004 00:38:49 -0000
***************
*** 175,180 ****
--- 175,181 ----
  extern Datum int2not(PG_FUNCTION_ARGS);
  extern Datum int2shl(PG_FUNCTION_ARGS);
  extern Datum int2shr(PG_FUNCTION_ARGS);
+ extern Datum generate_int(PG_FUNCTION_ARGS);
  
  /* name.c */
  extern Datum namein(PG_FUNCTION_ARGS);