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Fix crash of pg_stat_statements_info() without library loaded 

Other code paths are already protected against this case, and _PG_init()
warns about that in pg_stat_statements.c.  While on it, I have checked
the other extensions of the tree but did not notice any holes.

Oversight in 9fbc3f3.

Author: Jaime Casanova
Reviewed-by: Julien Rouhaud
Discussion: https://postgr.es/m/CAJKUy5gF4=_=qhJ1VX_tSGFfjKHb9BvzhRYWSApJD=Bfwp2SBw@mail.gmail.com
This commit is contained in:
Michael Paquier 2021-01-28 16:22:34 +09:00
parent f854c69a5b
commit bca96ddab5
1 changed files with 5 additions and 0 deletions
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5
contrib/pg_stat_statements/pg_stat_statements.c
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@ -1898,6 +1898,11 @@ pg_stat_statements_info(PG_FUNCTION_ARGS)
Datum values[PG_STAT_STATEMENTS_INFO_COLS];
bool nulls[PG_STAT_STATEMENTS_INFO_COLS];
if (!pgss || !pgss_hash)
ereport(ERROR,
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
errmsg("pg_stat_statements must be loaded via shared_preload_libraries")));
/* Build a tuple descriptor for our result type */
if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
elog(ERROR, "return type must be a row type");