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Fix handling of non-upgraded B-tree metapages

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857f9c36 bumps B-tree metapage version while upgrade is performed "on the fly"
when needed. However, some asserts fired when old version metapage was
cached to rel->rd_amcache. Despite new metadata fields are never used from
rel->rd_amcache, that needs to be fixed. This patch introduces metadata
upgrade during its caching, which fills unavailable fields with their default
values. contrib/pageinspect is also patched to handle non-upgraded metapages
in the same way.

Author: Alexander Korotkov
This commit is contained in:
Teodor Sigaev
2018-04-05 17:56:00 +03:00
parent 01b88b4df5
commit 0a64b45152
2 changed files with 56 additions and 8 deletions
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17
contrib/pageinspect/btreefuncs.c
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@ -555,8 +555,21 @@ bt_metap(PG_FUNCTION_ARGS)
values[j++] = psprintf("%d", metad->btm_level);
values[j++] = psprintf("%d", metad->btm_fastroot);
values[j++] = psprintf("%d", metad->btm_fastlevel);
values[j++] = psprintf("%u", metad->btm_oldest_btpo_xact);
values[j++] = psprintf("%lf", metad->btm_last_cleanup_num_heap_tuples);
/*
* Get values of extended metadata if available, use default values
* otherwise.
*/
if (metad->btm_version == BTREE_VERSION)
{
values[j++] = psprintf("%u", metad->btm_oldest_btpo_xact);
values[j++] = psprintf("%lf", metad->btm_last_cleanup_num_heap_tuples);
}
else
{
values[j++] = "0";
values[j++] = "-1";
}
tuple = BuildTupleFromCStrings(TupleDescGetAttInMetadata(tupleDesc),
values);