mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 03:52:35 +01:00
956980971f
The old code did not't correctly add TIME_FOR_COMPARE to rows that are part of the scan that will be compared with the attached where clause. Now the cost calculation for hash join and full join cache join are identical except for HASH_FANOUT (10%) The cost for a join with keys is now also uniform. The total cost for a using a key for lookup is calculated in one place as: (cost_of_finding_rows_through_key(records) + records/TIME_FOR_COMPARE)* record_count_of_previous_row_combinations + startup_cost startup_cost is the cost of a creating a temporary table (if needed) Best_cost now includes the cost of comparing all WHERE clauses and also cost of joining with previous row combinations. Other things: - Optimizer trace is now printing the total costs, including testing the WHERE clause (TIME_FOR_COMPARE) and comparing with all previous rows. - In optimizer trace, include also total cost of query together with the final join order. This makes it easier to find out where the cost was calculated. - Old code used filter even if the cost for it was higher than not using a filter. This is not corrected. - When rebasing on 10.11, I noticed some changes to access_cost_factor calculation. These changes was not picked as the coming changes to filtering will make that code obsolete. |
||
|---|---|---|
| .. | ||
| mysql-test/connect | ||
| .gitignore | ||
| ApacheInterface.java | ||
| array.cpp | ||
| array.h | ||
| blkfil.cpp | ||
| blkfil.h | ||
| block.h | ||
| bson.cpp | ||
| bson.h | ||
| bsonudf.cpp | ||
| bsonudf.h | ||
| catalog.h | ||
| checklvl.h | ||
| Client.java | ||
| Client2.java | ||
| Client3.java | ||
| CMakeLists.txt | ||
| cmgfam.cpp | ||
| cmgfam.h | ||
| cmgoconn.cpp | ||
| cmgoconn.h | ||
| colblk.cpp | ||
| colblk.h | ||
| connect.cc | ||
| connect.h | ||
| csort.cpp | ||
| csort.h | ||
| domdoc.cpp | ||
| domdoc.h | ||
| encas.h | ||
| engmsg.h | ||
| enids.h | ||
| filamap.cpp | ||
| filamap.h | ||
| filamdbf.cpp | ||
| filamdbf.h | ||
| filamfix.cpp | ||
| filamfix.h | ||
| filamgz.cpp | ||
| filamgz.h | ||
| filamtxt.cpp | ||
| filamtxt.h | ||
| filamvct.cpp | ||
| filamvct.h | ||
| filamzip.cpp | ||
| filamzip.h | ||
| filter.cpp | ||
| filter.h | ||
| fmdlex.c | ||
| global.h | ||
| ha_connect.cc | ||
| ha_connect.h | ||
| inihandl.cpp | ||
| inihandl.h | ||
| ioapi.c | ||
| ioapi.h | ||
| javaconn.cpp | ||
| javaconn.h | ||
| jdbccat.h | ||
| JdbcInterface.java | ||
| jdbconn.cpp | ||
| jdbconn.h | ||
| jmgfam.cpp | ||
| jmgfam.h | ||
| jmgoconn.cpp | ||
| jmgoconn.h | ||
| json.cpp | ||
| json.h | ||
| jsonudf.cpp | ||
| jsonudf.h | ||
| libdoc.cpp | ||
| libdoc.h | ||
| macutil.cpp | ||
| macutil.h | ||
| maputil.cpp | ||
| maputil.h | ||
| MariadbInterface.java | ||
| messages.h | ||
| mini-global.h | ||
| mongo.cpp | ||
| mongo.h | ||
| Mongo2Interface.java | ||
| Mongo3Interface.java | ||
| msgid.h | ||
| mycat.cc | ||
| mycat.h | ||
| myconn.cpp | ||
| myconn.h | ||
| MysqlInterface.java | ||
| myutil.cpp | ||
| myutil.h | ||
| noconst.c | ||
| odbccat.h | ||
| odbconn.cpp | ||
| odbconn.h | ||
| OracleInterface.java | ||
| os.h | ||
| osutil.c | ||
| osutil.h | ||
| plgcnx.h | ||
| plgdbsem.h | ||
| plgdbutl.cpp | ||
| plgodbc.h | ||
| plgxml.cpp | ||
| plgxml.h | ||
| plugutil.cpp | ||
| PostgresqlInterface.java | ||
| preparse.h | ||
| rcmsg.c | ||
| rcmsg.h | ||
| reldef.cpp | ||
| reldef.h | ||
| resource.h | ||
| rest.def | ||
| restget.cpp | ||
| tabbson.cpp | ||
| tabbson.h | ||
| tabcmg.cpp | ||
| tabcmg.h | ||
| tabcol.cpp | ||
| tabcol.h | ||
| tabdos.cpp | ||
| tabdos.h | ||
| tabext.cpp | ||
| tabext.h | ||
| tabfix.cpp | ||
| tabfix.h | ||
| tabfmt.cpp | ||
| tabfmt.h | ||
| tabjdbc.cpp | ||
| tabjdbc.h | ||
| tabjmg.cpp | ||
| tabjmg.h | ||
| tabjson.cpp | ||
| tabjson.h | ||
| table.cpp | ||
| tabmac.cpp | ||
| tabmac.h | ||
| tabmul.cpp | ||
| tabmul.h | ||
| tabmysql.cpp | ||
| tabmysql.h | ||
| taboccur.cpp | ||
| taboccur.h | ||
| tabodbc.cpp | ||
| tabodbc.h | ||
| tabpivot.cpp | ||
| tabpivot.h | ||
| tabrest.cpp | ||
| tabrest.h | ||
| tabsys.cpp | ||
| tabsys.h | ||
| tabtbl.cpp | ||
| tabtbl.h | ||
| tabutil.cpp | ||
| tabutil.h | ||
| tabvct.cpp | ||
| tabvct.h | ||
| tabvir.cpp | ||
| tabvir.h | ||
| tabwmi.cpp | ||
| tabwmi.h | ||
| tabxcl.cpp | ||
| tabxcl.h | ||
| tabxml.cpp | ||
| tabxml.h | ||
| tabzip.cpp | ||
| tabzip.h | ||
| TestInsert2.java | ||
| TestInsert3.java | ||
| unzip.c | ||
| unzip.h | ||
| user_connect.cc | ||
| user_connect.h | ||
| valblk.cpp | ||
| valblk.h | ||
| value.cpp | ||
| value.h | ||
| xindex.cpp | ||
| xindex.h | ||
| xobject.cpp | ||
| xobject.h | ||
| xtable.h | ||
| zip.c | ||
| zip.h | ||