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Fix bad formula in previous commit.

Browse source 
Commit d5406dea25 used a slightly
novel, and wrong, approach to compute the length of the last
toast chunk. It worked fine unless the last chunk happened to
have the largest possible size.
This commit is contained in:
Robert Haas 2019-12-17 15:53:17 -05:00
parent d5406dea25
commit 5184f110aa
1 changed files with 2 additions and 2 deletions
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4
src/backend/access/common/detoast.c
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@ -443,7 +443,7 @@ toast_fetch_datum(struct varlena *attr)
toast_pointer.va_valueid,
RelationGetRelationName(toastrel))));
expected_size = curchunk < totalchunks - 1 ? TOAST_MAX_CHUNK_SIZE
: attrsize % TOAST_MAX_CHUNK_SIZE;
: attrsize - ((totalchunks - 1) * TOAST_MAX_CHUNK_SIZE);
if (chunksize != expected_size)
ereport(ERROR,
(errcode(ERRCODE_DATA_CORRUPTED),
@ -676,7 +676,7 @@ toast_fetch_datum_slice(struct varlena *attr, int32 sliceoffset,
toast_pointer.va_valueid,
RelationGetRelationName(toastrel))));
expected_size = curchunk < totalchunks - 1 ? TOAST_MAX_CHUNK_SIZE
: attrsize % TOAST_MAX_CHUNK_SIZE;
: attrsize - ((totalchunks - 1) * TOAST_MAX_CHUNK_SIZE);
if (chunksize != expected_size)
ereport(ERROR,
(errcode(ERRCODE_DATA_CORRUPTED),