diff options
Diffstat (limited to 'innobase/dict/dict0dict.c')
| -rw-r--r-- | innobase/dict/dict0dict.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/innobase/dict/dict0dict.c b/innobase/dict/dict0dict.c index bd07c5abffe..61bf3fae137 100644 --- a/innobase/dict/dict0dict.c +++ b/innobase/dict/dict0dict.c @@ -526,8 +526,10 @@ dict_index_contains_col_or_prefix( } /************************************************************************ -Looks for a matching field in an index. The column and the prefix len have -to be the same. */ +Looks for a matching field in an index. The column has to be the same. The +column in index must be complete, or must contain a prefix longer than the +column in index2. That is, we must be able to construct the prefix in index2 +from the prefix in index. */ ulint dict_index_get_nth_field_pos( @@ -555,7 +557,9 @@ dict_index_get_nth_field_pos( field = dict_index_get_nth_field(index, pos); if (field->col == field2->col - && field->prefix_len == field2->prefix_len) { + && (field->prefix_len == 0 + || (field->prefix_len >= field2->prefix_len + && field2->prefix_len != 0))) { return(pos); } |