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Add SysCacheGetAttrNotNull for guaranteed not-null attrs

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When extracting an attr from a cached tuple in the syscache with
SysCacheGetAttr the isnull parameter must be checked in case the
attr cannot be NULL.  For cases when this is known beforehand, a
wrapper is introduced which perform the errorhandling internally
on behalf of the caller, invoking an elog in case of a NULL attr.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Peter Eisentraut <peter.eisentraut@enterprisedb.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Discussion: https://postgr.es/m/AD76405E-DB45-46B6-941F-17B1EB3A9076@yesql.se
This commit is contained in:
Daniel Gustafsson
2023-03-25 22:49:33 +01:00
parent e33967b13b
commit d435f15fff
38 changed files with 232 additions and 452 deletions
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7
src/backend/executor/functions.c
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@ -660,12 +660,7 @@ init_sql_fcache(FunctionCallInfo fcinfo, Oid collation, bool lazyEvalOK)
/*
* And of course we need the function body text.
*/
tmp = SysCacheGetAttr(PROCOID,
procedureTuple,
Anum_pg_proc_prosrc,
&isNull);
if (isNull)
elog(ERROR, "null prosrc for function %u", foid);
tmp = SysCacheGetAttrNotNull(PROCOID, procedureTuple, Anum_pg_proc_prosrc);
fcache->src = TextDatumGetCString(tmp);
/* If we have prosqlbody, pay attention to that not prosrc. */