diff options
Diffstat (limited to 'storage/innodb_plugin/row/row0undo.c')
| -rw-r--r-- | storage/innodb_plugin/row/row0undo.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/storage/innodb_plugin/row/row0undo.c b/storage/innodb_plugin/row/row0undo.c index 9ef842b5114..fd28a4f6520 100644 --- a/storage/innodb_plugin/row/row0undo.c +++ b/storage/innodb_plugin/row/row0undo.c @@ -199,8 +199,24 @@ row_undo_search_clust_to_pcur( ret = FALSE; } else { + row_ext_t** ext; + + if (dict_table_get_format(node->table) >= DICT_TF_FORMAT_ZIP) { + /* In DYNAMIC or COMPRESSED format, there is + no prefix of externally stored columns in the + clustered index record. Build a cache of + column prefixes. */ + ext = &node->ext; + } else { + /* REDUNDANT and COMPACT formats store a local + 768-byte prefix of each externally stored + column. No cache is needed. */ + ext = NULL; + node->ext = NULL; + } + node->row = row_build(ROW_COPY_DATA, clust_index, rec, - offsets, NULL, &node->ext, node->heap); + offsets, NULL, ext, node->heap); if (node->update) { node->undo_row = dtuple_copy(node->row, node->heap); row_upd_replace(node->undo_row, &node->undo_ext, |