database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-02 09:02:37 +03:00
Code Activity

Add support for invoking parser callback hooks via SPI and in cached plans.

Browse Source 
As proof of concept, modify plpgsql to use the hooks.  plpgsql is still
inserting $n symbols textually, but the "back end" of the parsing process now
goes through the ParamRef hook instead of using a fixed parameter-type array,
and then execution only fetches actually-referenced parameters, using a hook
added to ParamListInfo.

Although there's a lot left to be done in plpgsql, this already cures the
"if (TG_OP = 'INSERT' and NEW.foo ...)"  problem, as illustrated by the
changed regression test.
This commit is contained in:
Tom Lane
2009-11-04 22:26:08 +00:00
parent 48912acc08
commit 9bedd128d6
23 changed files with 1110 additions and 533 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
src/backend/commands/explain.c
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1994-5, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/explain.c,v 1.192 2009/10/12 18:10:41 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/explain.c,v 1.193 2009/11/04 22:26:04 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -107,8 +107,6 @@ ExplainQuery(ExplainStmt *stmt, const char *queryString,
ParamListInfo params, DestReceiver *dest)
{
ExplainState es;
Oid *param_types;
int num_params;
TupOutputState *tstate;
List *rewritten;
ListCell *lc;
@ -150,9 +148,6 @@ ExplainQuery(ExplainStmt *stmt, const char *queryString,
opt->defname)));
}
/* Convert parameter type data to the form parser wants */
getParamListTypes(params, &param_types, &num_params);
/*
* Run parse analysis and rewrite. Note this also acquires sufficient
* locks on the source table(s).
@ -163,8 +158,10 @@ ExplainQuery(ExplainStmt *stmt, const char *queryString,
* executed repeatedly. (See also the same hack in DECLARE CURSOR and
* PREPARE.) XXX FIXME someday.
*/
rewritten = pg_analyze_and_rewrite((Node *) copyObject(stmt->query),
queryString, param_types, num_params);
rewritten = pg_analyze_and_rewrite_params((Node *) copyObject(stmt->query),
queryString,
(ParserSetupHook) setupParserWithParamList,
params);
/* emit opening boilerplate */
ExplainBeginOutput(&es);