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Arrange to "inline" SQL functions that appear in a query's FROM clause,

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are declared to return set, and consist of just a single SELECT.  We
can replace the FROM-item with a sub-SELECT and then optimize much as
if we were dealing with a view.  Patch from Richard Rowell, cleaned up
by me.
This commit is contained in:
Tom Lane
2008-03-18 22:04:14 +00:00
parent 433c5238bf
commit 0d49838df6
8 changed files with 424 additions and 48 deletions
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3
src/include/executor/functions.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/executor/functions.h,v 1.30 2008/01/01 19:45:57 momjian Exp $
* $PostgreSQL: pgsql/src/include/executor/functions.h,v 1.31 2008/03/18 22:04:14 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -21,6 +21,7 @@ extern Datum fmgr_sql(PG_FUNCTION_ARGS);
extern bool check_sql_fn_retval(Oid func_id, Oid rettype,
List *queryTreeList,
bool insertRelabels,
JunkFilter **junkFilter);
#endif /* FUNCTIONS_H */