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Fix incorrect lack of Datum conversion in _int_matchsel()

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The code used

    return (Selectivity) 0.0;

where

    PG_RETURN_FLOAT8(0.0);

would be correct.

On 64-bit systems, these are pretty much equivalent, but on 32-bit
systems, PG_RETURN_FLOAT8() correctly produces a pointer, but the old
wrong code would return a null pointer, possibly leading to a crash
elsewhere.

We think this code is actually not reachable because bqarr_in won't
accept an empty query, and there is no other function that will
create query_int values.  But better be safe and not let such
incorrect code lie around.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/8246d7ff-f4b7-4363-913e-827dadfeb145%40eisentraut.org
This commit is contained in:
Peter Eisentraut
2025-08-08 12:06:06 +02:00
parent 73eb6afa13
commit 64dec8060c
1 changed files with 1 additions and 1 deletions
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2
contrib/intarray/_int_selfuncs.c
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@@ -178,7 +178,7 @@ _int_matchsel(PG_FUNCTION_ARGS)
if (query->size == 0) if (query->size == 0)
{ {
ReleaseVariableStats(vardata); ReleaseVariableStats(vardata);
return (Selectivity) 0.0; PG_RETURN_FLOAT8(0.0);
} }
/* /*