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Implement worklog #5743 InnoDB: Lift the limit of index key prefixes.

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With this change, the index prefix column length lifted from 767 bytes
to 3072 bytes if "innodb_large_prefix" is set to "true".

rb://603 approved by Marko
This commit is contained in:
Jimmy Yang 2011-05-31 02:12:32 -07:00
commit 9e2b7fa7d5
31 changed files with 827 additions and 156 deletions
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9
storage/innobase/include/row0ext.ic
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@ -37,7 +37,7 @@ row_ext_lookup_ith(
const row_ext_t* ext, /*!< in/out: column prefix cache */
ulint i, /*!< in: index of ext->ext[] */
ulint* len) /*!< out: length of prefix, in bytes,
at most REC_MAX_INDEX_COL_LEN */
at most ext->max_len */
{
ut_ad(ext);
ut_ad(len);
@ -45,11 +45,14 @@ row_ext_lookup_ith(
*len = ext->len[i];
ut_ad(*len <= ext->max_len);
ut_ad(ext->max_len > 0);
if (UNIV_UNLIKELY(*len == 0)) {
/* The BLOB could not be fetched to the cache. */
return(field_ref_zero);
} else {
return(ext->buf + i * REC_MAX_INDEX_COL_LEN);
return(ext->buf + i * ext->max_len);
}
}
@ -67,7 +70,7 @@ row_ext_lookup(
dict_col_get_no(); NOT relative to the
records in the clustered index */
ulint* len) /*!< out: length of prefix, in bytes,
at most REC_MAX_INDEX_COL_LEN */
at most ext->max_len */
{
ulint i;