- When analying multiple equalities, take into account that they
may not have a single table field that belongs to one of the tables
that we're trying to eliminate (and they are not useful for table
elimination in that case)
mysql-test/r/table_elim.result:
LPBUG#523593: Running RQG optimizer_no_subquery crashes MariaDB
- Testcase
mysql-test/t/table_elim.test:
LPBUG#523593: Running RQG optimizer_no_subquery crashes MariaDB
- Testcase
include/my_global.h:
MWL#17: Table elimination: fixes for windows
- Add ALIGN_MAX_UNIT (assume malloc returns data aligned to this much)
mysql-test/r/table_elim.result:
MWL#17: Table elimination: fixes for windows
- Use only lower-case as EXPLAIN [EXTENDED] changes case of table names
on windows
mysql-test/t/table_elim.test:
MWL#17: Table elimination: fixes for windows
- Use only lower-case as EXPLAIN [EXTENDED] changes case of table names
on windows
sql/opt_table_elimination.cc:
MWL#17: Table elimination: fixes for windows
- Add extra alignment-padding-space for stack-allocated buffers.
- Fix a trivial problem when OR-merging two multi-equalities
- Amend testsuite to provide full gcov coverage
mysql-test/r/table_elim.result:
MWL#17: Table elimination:
- Amend testsuite to provide full gcov coverage
mysql-test/t/table_elim.test:
MWL#17: Table elimination:
- Amend testsuite to provide full gcov coverage
- Add an @@optimizer_switch flag for table_elimination for debug build
- Better comments
mysql-test/t/index_merge_myisam.test:
MWL#17: Table elimination: last fixes
- Add an @@optimizer_switch flag for table_elimination for debug build
sql/mysql_priv.h:
MWL#17: Table elimination: last fixes
- Add an @@optimizer_switch flag for table_elimination for debug build
sql/mysqld.cc:
MWL#17: Table elimination: last fixes
- Add an @@optimizer_switch flag for table_elimination for debug build
- More testcases
- Set correct dependencies for non-bound multi-equalities.
mysql-test/r/table_elim.result:
MWL#17: Table elimination
- More testcases
mysql-test/t/table_elim.test:
MWL#17: Table elimination
- More testcases
sql/opt_table_elimination.cc:
MWL#17: Table elimination
- Set correct dependencies for non-bound multi-equalities.
- Address review feedback: change expression analyzer used to be a copy-paste
of ref analyzer. ref analyzer, besides doing ref analysis, also collected
info about keys which had sargable predicates. We didn't need that part here.
- Switch from uniform graph to bipartite graph with two kinds of nodes:
"values" (tables and fields) and "modules" (t.col=func(...) equalities,
multi-equalities, unique keys, inner sides of outer joins).
- Rename functions, classes, etc.
Address review feedback:
- Change from Wave-based approach (a-la const table detection) to
building and walking functional dependency graph.
- Change from piggy-backing on ref-access code and KEYUSE structures
to using our own expression analyzer.
sql/item.cc:
MWL#17: Table elimination
- Move from C-ish Field_processor_info to C++ ish and generic Field_enumerator
sql/item.h:
MWL#17: Table elimination
- Move from C-ish Field_processor_info to C++ ish and generic Field_enumerator
sql/sql_bitmap.h:
MWL#17: Table elimination
- Backport of Table_map_iterator from 6.0
- Last fixes
sql/item.cc:
MWL#17: Table elimination
- Don't make multiple calls of ::walk(check_column_usage_processor),
call once and cache the value
sql/item.h:
MWL#17: Table elimination
- s/KEYUSE::usable/KEYUSE::type/, more comments
sql/opt_table_elimination.cc:
MWL#17: Table elimination
- Don't make multiple calls of ::walk(check_column_usage_processor),
call once and cache the value
sql/sql_select.cc:
MWL#17: Table elimination
- s/KEYUSE::usable/KEYUSE::type/, more comments
sql/sql_select.h:
MWL#17: Table elimination
- s/KEYUSE::usable/KEYUSE::type/, more comments
sql/table.h:
MWL#17: Table elimination
- Better comments
