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data0data.c Fix an assertion failure in rem0rec.c line 195 when a > 8000 byte row is updated and an internally stored field shortened

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innobase/data/data0data.c:
  Fix an assertion failure in rem0rec.c line 195 when a > 8000 byte row is updated and an internally stored field shortened
This commit is contained in:
unknown 2001-09-05 20:29:34 +03:00
parent 993603fe71
commit fec70ce417
1 changed files with 8 additions and 15 deletions
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23
innobase/data/data0data.c
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@ -470,7 +470,8 @@ dtuple_convert_big_rec(
}
}
if (longest < BTR_EXTERN_FIELD_REF_SIZE + 10) {
if (longest < BTR_EXTERN_FIELD_REF_SIZE + 10
+ REC_1BYTE_OFFS_LIMIT) {
/* Cannot shorten more */
@ -479,26 +480,18 @@ dtuple_convert_big_rec(
return(NULL);
}
/* Move data from field longest_i to big rec vector,
but do not let data size of the remaining entry
/* Move data from field longest_i to big rec vector;
we do not let data size of the remaining entry
drop below 128 which is the limit for the 2-byte
offset storage format in a physical record */
offset storage format in a physical record. This
we accomplish by storing 128 bytes of data in entry
itself, and only the remaining part to big rec vec. */
dfield = dtuple_get_nth_field(entry, longest_i);
vector->fields[n_fields].field_no = longest_i;
if (dtuple_get_data_size(entry) - dfield->len
<= REC_1BYTE_OFFS_LIMIT) {
vector->fields[n_fields].len =
dtuple_get_data_size(entry)
vector->fields[n_fields].len = dfield->len
- REC_1BYTE_OFFS_LIMIT;
/* Since dfield will contain at least
a 20-byte reference to the extern storage,
we know that the data size of entry will be
> REC_1BYTE_OFFS_LIMIT */
} else {
vector->fields[n_fields].len = dfield->len;
}
vector->fields[n_fields].data = mem_heap_alloc(heap,
vector->fields[n_fields].len);