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Adjust index locking rules as per my proposal of earlier today. You

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now are supposed to take some kind of lock on an index whenever you
are going to access the index contents, rather than relying only on a
lock on the parent table.
This commit is contained in:
Tom Lane
2004-09-30 23:21:26 +00:00
parent d674884306
commit d2af5f8a3e
7 changed files with 74 additions and 46 deletions
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7
src/backend/access/heap/tuptoaster.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/heap/tuptoaster.c,v 1.45 2004/08/29 05:06:40 momjian Exp $
* $PostgreSQL: pgsql/src/backend/access/heap/tuptoaster.c,v 1.46 2004/09/30 23:21:06 tgl Exp $
*
*
* INTERFACE ROUTINES
@ -1007,11 +1007,13 @@ toast_save_datum(Relation rel, Datum value)
data_todo = VARATT_SIZE(value) - VARHDRSZ;
/*
* Open the toast relation
* Open the toast relation. We must explicitly lock the toast index
* because we aren't using an index scan here.
*/
toastrel = heap_open(rel->rd_rel->reltoastrelid, RowExclusiveLock);
toasttupDesc = toastrel->rd_att;
toastidx = index_open(toastrel->rd_rel->reltoastidxid);
LockRelation(toastidx, RowExclusiveLock);
/*
* Split up the item into chunks
@ -1065,6 +1067,7 @@ toast_save_datum(Relation rel, Datum value)
/*
* Done - close toast relation and return the reference
*/
UnlockRelation(toastidx, RowExclusiveLock);
index_close(toastidx);
heap_close(toastrel, RowExclusiveLock);