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This is loosely based on the InnoDB changes in mysql/mysql-server@97fd8b1b69 that I had developed in 2015 or 2016. For each B-tree key field, we will allow a flag ASC/DESC to be associated. When PRIMARY KEY fields are internally appended to secondary indexes, the ASC/DESC attribute will be inherited, so that covering index scans will work as expected. Note: Until the subsequent commit, the DESC attribute will be ignored (no HA_REVERSE_SORT flag will be written to .frm files). dict_field_t::descending: A new flag to denote descending order. cmp_data(), cmp_dfield_dfield(): Add a new parameter descending. cmp_dtuple_rec(), cmp_dtuple_rec_with_match(): Add a parameter "index". dtuple_coll_eq(): Replaces dtuple_coll_cmp(). cmp_dfield_dfield_eq_prefix(): Replaces cmp_dfield_dfield_like_prefix(). dict_index_t::is_btree(): Check whether the index is a regular B-tree index (not SPATIAL, FULLTEXT, or the ibuf.index, or a corrupted index. btr_cur_search_to_nth_level_func(): Only attempt to use the adaptive hash index if index->is_btree(). This function may also be invoked on ibuf.index, and cmp_dtuple_rec_with_match_bytes() will no longer work on ibuf.index because it assumes that the index and record fields exactly match. The ibuf.index is a special variadic index tree. Thanks to Thirunarayanan Balathandayuthapani for fixing some bugs: MDEV-27439, MDEV-27374/MDEV-27445. |
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| .. | ||
| btr | ||
| buf | ||
| data | ||
| dict | ||
| eval | ||
| fil | ||
| fsp | ||
| fts | ||
| fut | ||
| gis | ||
| ha | ||
| handler | ||
| ibuf | ||
| include | ||
| lock | ||
| log | ||
| mem | ||
| mtr | ||
| mysql-test/storage_engine | ||
| os | ||
| page | ||
| pars | ||
| que | ||
| read | ||
| rem | ||
| row | ||
| srv | ||
| sync | ||
| trx | ||
| unittest | ||
| ut | ||
| .clang-format-old | ||
| CMakeLists.txt | ||
| COPYING.Google | ||
| COPYING.Percona | ||
| innodb.cmake | ||
| plugin_exports | ||