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| author | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2015-08-13 00:12:07 -0300 |
|---|---|---|
| committer | Alvaro Herrera <alvherre@alvh.no-ip.org> | 2015-08-13 00:12:07 -0300 |
| commit | 652ca927ca4d9553691b9c6385111bea353070d8 (patch) | |
| tree | 04c4b78e8acb8fed6ef2db6dcdaf06224b6d75c6 /src/backend/access | |
| parent | ec94bc1473475128ef4e7b62636e66effd314102 (diff) | |
| download | postgresql-652ca927ca4d9553691b9c6385111bea353070d8.tar.gz postgresql-652ca927ca4d9553691b9c6385111bea353070d8.zip | |
Fix unitialized variables
As complained by clang, reported by Andres Freund. Brown paper bag bug
in ccc4c074994d.
Add some comments, too.
Backpatch to 9.5, like that one.
Diffstat (limited to 'src/backend/access')
| -rw-r--r-- | src/backend/access/brin/brin_pageops.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/backend/access/brin/brin_pageops.c b/src/backend/access/brin/brin_pageops.c index 875544e336c..6a2fd474d9a 100644 --- a/src/backend/access/brin/brin_pageops.c +++ b/src/backend/access/brin/brin_pageops.c @@ -86,6 +86,7 @@ brin_doupdate(Relation idxrel, BlockNumber pagesPerRange, { LockBuffer(oldbuf, BUFFER_LOCK_EXCLUSIVE); newbuf = InvalidBuffer; + extended = false; } oldpage = BufferGetPage(oldbuf); oldlp = PageGetItemId(oldpage, oldoff); @@ -335,9 +336,8 @@ brin_doinsert(Relation idxrel, BlockNumber pagesPerRange, brinRevmapExtend(revmap, heapBlk); /* - * Obtain a locked buffer to insert the new tuple. Note - * brin_getinsertbuffer ensures there's enough space in the returned - * buffer. + * Acquire lock on buffer supplied by caller, if any. If it doesn't have + * enough space, unpin it to obtain a new one below. */ if (BufferIsValid(*buffer)) { @@ -354,12 +354,18 @@ brin_doinsert(Relation idxrel, BlockNumber pagesPerRange, } } + /* + * If we still don't have a usable buffer, have brin_getinsertbuffer + * obtain one for us. + */ if (!BufferIsValid(*buffer)) { *buffer = brin_getinsertbuffer(idxrel, InvalidBuffer, itemsz, &extended); Assert(BufferIsValid(*buffer)); Assert(extended || br_page_get_freespace(BufferGetPage(*buffer)) >= itemsz); } + else + extended = false; /* Now obtain lock on revmap buffer */ revmapbuf = brinLockRevmapPageForUpdate(revmap, heapBlk); @@ -367,6 +373,7 @@ brin_doinsert(Relation idxrel, BlockNumber pagesPerRange, page = BufferGetPage(*buffer); blk = BufferGetBlockNumber(*buffer); + /* Execute the actual insertion */ START_CRIT_SECTION(); if (extended) brin_page_init(BufferGetPage(*buffer), BRIN_PAGETYPE_REGULAR); |