diff options
Diffstat (limited to 'storage/xtradb/dict/dict0dict.c')
| -rw-r--r-- | storage/xtradb/dict/dict0dict.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/storage/xtradb/dict/dict0dict.c b/storage/xtradb/dict/dict0dict.c index 516b6e927e0..29063f028f1 100644 --- a/storage/xtradb/dict/dict0dict.c +++ b/storage/xtradb/dict/dict0dict.c @@ -525,6 +525,20 @@ dict_index_get_nth_col_or_prefix_pos( return(ULINT_UNDEFINED); } +/********************************************************************//** +Looks for column n in an index. +@return position in internal representation of the index; +ULINT_UNDEFINED if not contained */ +UNIV_INTERN +ulint +dict_index_get_nth_col_pos( +/*=======================*/ + const dict_index_t* index, /*!< in: index */ + ulint n) /*!< in: column number */ +{ + return(dict_index_get_nth_col_or_prefix_pos(index, n, FALSE)); +} + #ifndef UNIV_HOTBACKUP /********************************************************************//** Returns TRUE if the index contains a column or a prefix of that column. @@ -2088,7 +2102,6 @@ dict_index_build_internal_clust( { dict_index_t* new_index; dict_field_t* field; - ulint fixed_size; ulint trx_id_pos; ulint i; ibool* indexed; @@ -2165,7 +2178,7 @@ dict_index_build_internal_clust( for (i = 0; i < trx_id_pos; i++) { - fixed_size = dict_col_get_fixed_size( + ulint fixed_size = dict_col_get_fixed_size( dict_index_get_nth_col(new_index, i), dict_table_is_comp(table)); @@ -2182,7 +2195,20 @@ dict_index_build_internal_clust( break; } - new_index->trx_id_offset += (unsigned int) fixed_size; + /* Add fixed_size to new_index->trx_id_offset. + Because the latter is a bit-field, an overflow + can theoretically occur. Check for it. */ + fixed_size += new_index->trx_id_offset; + + new_index->trx_id_offset = fixed_size; + + if (new_index->trx_id_offset != fixed_size) { + /* Overflow. Pretend that this is a + variable-length PRIMARY KEY. */ + ut_ad(0); + new_index->trx_id_offset = 0; + break; + } } } |