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Revert "Optimize various aggregate deserialization functions"

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This reverts commit 608fd198de.

On 2nd thoughts, the StringInfo API requires that strings are NUL
terminated and pointing directly to the data in a bytea Datum isn't NUL
terminated.

Discussion: https://postgr.es/m/CAApHDvorfO3iBZ=xpiZvp3uHtJVLyFaPBSvcAhAq2HPLnaNSwQ@mail.gmail.com
This commit is contained in:
David Rowley
2023-10-10 14:16:54 +13:00
parent f483b20905
commit 4f3b56eea2
3 changed files with 42 additions and 42 deletions
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12
src/backend/utils/adt/varlena.c
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@@ -5289,13 +5289,12 @@ string_agg_deserialize(PG_FUNCTION_ARGS)
sstate = PG_GETARG_BYTEA_PP(0);
/*
* Fake up a StringInfo pointing to the bytea's value so we can "receive"
* the serialized aggregate state value.
* Copy the bytea into a StringInfo so that we can "receive" it using the
* standard recv-function infrastructure.
*/
buf.data = VARDATA_ANY(sstate);
buf.len = VARSIZE_ANY_EXHDR(sstate);
buf.maxlen = 0;
buf.cursor = 0;
initStringInfo(&buf);
appendBinaryStringInfo(&buf,
VARDATA_ANY(sstate), VARSIZE_ANY_EXHDR(sstate));
result = makeStringAggState(fcinfo);
@@ -5308,6 +5307,7 @@ string_agg_deserialize(PG_FUNCTION_ARGS)
appendBinaryStringInfo(result, data, datalen);
pq_getmsgend(&buf);
pfree(buf.data);
PG_RETURN_POINTER(result);
}