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f36ca142f7
Prototype change: - virtual ha_rows records_in_range(uint inx, key_range *min_key, - key_range *max_key) + virtual ha_rows records_in_range(uint inx, const key_range *min_key, + const key_range *max_key, + page_range *res) The handler can ignore the page_range parameter. In the case the handler updates the parameter, the optimizer can deduce the following: - If previous range's last key is on the same block as next range's first key - If the current key range is in one block - We can also assume that the first and last block read are cached! This can be used for a better calculation of IO seeks when we estimate the cost of a range index scan. The parameter is fully implemented for MyISAM, Aria and InnoDB. A separate patch will update handler::multi_range_read_info_const() to take the benefits of this change and also remove the double records_in_range() calls that are not anymore needed. |
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| .. | ||
| hs_client | ||
| mysql-test/spider | ||
| scripts | ||
| CMakeLists.txt | ||
| configure.in | ||
| ha_spider.cc | ||
| ha_spider.h | ||
| Makefile.am | ||
| spd_conn.cc | ||
| spd_conn.h | ||
| spd_copy_tables.cc | ||
| spd_copy_tables.h | ||
| spd_db_conn.cc | ||
| spd_db_conn.h | ||
| spd_db_handlersocket.cc | ||
| spd_db_handlersocket.h | ||
| spd_db_include.cc | ||
| spd_db_include.h | ||
| spd_db_mysql.cc | ||
| spd_db_mysql.h | ||
| spd_db_oracle.cc | ||
| spd_db_oracle.h | ||
| spd_direct_sql.cc | ||
| spd_direct_sql.h | ||
| spd_environ.h | ||
| spd_err.h | ||
| spd_group_by_handler.cc | ||
| spd_group_by_handler.h | ||
| spd_i_s.cc | ||
| spd_include.h | ||
| spd_init_query.h | ||
| spd_malloc.cc | ||
| spd_malloc.h | ||
| spd_param.cc | ||
| spd_param.h | ||
| spd_ping_table.cc | ||
| spd_ping_table.h | ||
| spd_sys_table.cc | ||
| spd_sys_table.h | ||
| spd_table.cc | ||
| spd_table.h | ||
| spd_trx.cc | ||
| spd_trx.h | ||
| spd_udf.cc | ||
| spd_udf.def | ||
| spd_udf.h | ||