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Fix bad formula in previous commit.

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Commit d5406dea25b600408e7acf17d5a06e82d3ce6d0d 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),