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MDEV-33502 Slowdown when running nested statement with many partitions This change was triggered to help some MariaDB users with close to 10000 bits in their bitmaps. - Change underlaying storage to be 64 bit instead of 32bit. - This reduses number of loops to scan bitmaps. - This can cause some bitmaps to be 4 byte large. - Ensure that all not used top-bits are always 0 (simplifes code as the last 64 bit storage is not a special case anymore). - Use my_find_first_bit() to find the first set bit which is much faster than scanning trough things byte by byte and then bit by bit. Other things: - Added a bool to remember if my_bitmap_init() did allocate the bitmap array. my_bitmap_free() will only free arrays it did allocate. This allowed me to remove setting 'bitmap=0' before calling my_bitmap_free() for cases where the bitmap's where allocated externally. - my_bitmap_init() sets bitmap to 0 in case of failure. - Added 'universal' asserts to most bitmap functions. - Change all remaining calls to bitmap_init() to my_bitmap_init(). - To finish the change from 2014. - Changed all usage of uint32 in my_bitmap.h to my_bitmap_map. - Updated bitmap_copy() to handle bitmaps of different size. - Removed const from bitmap_exists_intersection() as this caused casts on all usage. - Removed not used function bitmap_set_above(). - Renamed create_last_word_mask() to create_last_bit_mask() (to match name changes in my_bitmap.cc) - Extended bitmap-t with test for more bitmap functions. |
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| .. | ||
| build | ||
| data | ||
| lib | ||
| mysql-test | ||
| packages | ||
| test | ||
| tools | ||
| udf | ||
| vendor/groonga | ||
| appveyor.yml | ||
| AUTHORS | ||
| autogen.sh | ||
| ChangeLog | ||
| CMakeLists.txt | ||
| config.sh.in | ||
| configure.ac | ||
| COPYING | ||
| gpg_uid | ||
| ha_mroonga.cpp | ||
| ha_mroonga.def | ||
| ha_mroonga.hpp | ||
| Makefile.am | ||
| mrn_constants.hpp | ||
| mrn_err.h | ||
| mrn_macro.hpp | ||
| mrn_mysql.h | ||
| mrn_mysql_compat.h | ||
| mrn_table.cpp | ||
| mrn_table.hpp | ||
| mrn_variables.hpp | ||
| mrn_version.h.in | ||
| NEWS | ||
| plugin_version | ||
| README | ||
| required_groonga_normalizer_mysql_version | ||
| required_groonga_version | ||
| sources.am | ||
| version_full | ||
| version_in_hex | ||
| version_major | ||
| version_micro | ||
| version_minor | ||
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