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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-09-06 17:31:58 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-09-06 17:31:58 +0000 |
| commit | f8942f4a15fa5baa51c52491147a1bb910532332 (patch) | |
| tree | d8d7b6f9cb19ebbad98e8893abff208a42e492fb /src/backend/executor/execQual.c | |
| parent | 190df8a4cfc2a9df911f001b1601c4cc937d5a07 (diff) | |
Make eval_const_expressions() preserve typmod when simplifying something like
null::char(3) to a simple Const node. (It already worked for non-null values,
but not when we skipped evaluation of a strict coercion function.) This
prevents loss of typmod knowledge in situations such as exhibited in bug
#3598. Unfortunately there seems no good way to fix that bug in 8.1 and 8.2,
because they simply don't carry a typmod for a plain Const node.
In passing I made all the other callers of makeNullConst supply "real" typmod
values too, though I think it probably doesn't matter anywhere else.
Diffstat (limited to 'src/backend/executor/execQual.c')
| -rw-r--r-- | src/backend/executor/execQual.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/backend/executor/execQual.c b/src/backend/executor/execQual.c index 85c3be3e8dd..cc165006f5c 100644 --- a/src/backend/executor/execQual.c +++ b/src/backend/executor/execQual.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/executor/execQual.c,v 1.221 2007/08/31 18:33:40 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/executor/execQual.c,v 1.222 2007/09/06 17:31:58 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -4159,7 +4159,7 @@ ExecInitExpr(Expr *node, PlanState *parent) * don't really care what type of NULL it is, so * always make an int4 NULL. */ - e = (Expr *) makeNullConst(INT4OID); + e = (Expr *) makeNullConst(INT4OID, -1); } estate = ExecInitExpr(e, parent); outlist = lappend(outlist, estate); |