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Fix vacuum bug Vadim found with text fields.

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This commit is contained in:
Bruce Momjian 1997-03-06 18:38:35 +00:00
parent 74bd93d597
commit da90363c12
1 changed files with 8 additions and 8 deletions
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16
src/backend/commands/vacuum.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.21 1997/03/06 11:41:09 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/vacuum.c,v 1.22 1997/03/06 18:38:35 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -427,8 +427,8 @@ vc_vacone (Oid relid)
memmove(stats->attr,attr[i],ATTRIBUTE_TUPLE_SIZE);
stats->best = stats->guess1 = stats->guess2 = 0;
stats->max = stats->min = 0;
stats->best_len = stats->guess1_len = stats->guess2_len = 0;
stats->max_len = stats->min_len = 0;
stats->best_len = stats->guess1_len = stats->guess2_len = -1;
stats->max_len = stats->min_len = -1;
stats->initialized = false;
stats->best_cnt = stats->guess1_cnt = stats->guess1_hits = stats->guess2_hits = 0;
stats->max_cnt = stats->min_cnt = stats->null_cnt = stats->nonnull_cnt = 0;
@ -1628,14 +1628,14 @@ vc_bucketcpy(AttributeTupleForm attr, Datum value, Datum *bucket, int16 *bucket_
else {
int len = (attr->attlen != -1 ? attr->attlen : VARSIZE(value));
if (len > *bucket_len)
if (len > *bucket_len) /* bucket_len only grows, prevents thrashing */
{
if (*bucket_len != 0)
if (*bucket_len != -1) /* have we allocated before? */
pfree(DatumGetPointer(*bucket));
*bucket = PointerGetDatum(palloc(len));
*bucket = PointerGetDatum(palloc(len+VARHDRSZ));
*bucket_len = len;
}
*bucket_len = len;
memmove(DatumGetPointer(*bucket), DatumGetPointer(value), len);
memmove(DatumGetPointer(*bucket), DatumGetPointer(value), len+VARHDRSZ);
}
}