mariadb

Tree: 2cb35cd680

unknown ce8bf087b0 Fix for bug #31207 : Test "join_nested" shows different strategy on IA64 CPUs / Intel's ICC compile The bug is a combination of two problems: 1. IA64/ICC MySQL binaries use glibc's qsort(), not the one in mysys. 2. The order relation implemented by join_tab_cmp() is not transitive, i.e. it is possible to choose such a, b and c that (a < b) && (b < c) but (c < a). This implies that result of a sort using the relation implemented by join_tab_cmp() depends on the order in which elements are compared, i.e. the result is implementation-specific. Since choose_plan() uses qsort() to pre-sort the join tables using join_tab_cmp() as a compare function, the results of the sorting may vary depending on qsort() implementation. It is neither possible nor important to implement a better ordering algorithm in join_tab_cmp(). Therefore the only way to fix it is to force our own qsort() to be used by renaming it to my_qsort(), so we don't depend on linker to decide that. This patch also "fixes" bug #20530: qsort redefinition violates the standard. include/my_sys.h: Renamed qsort() and qsort2() to my_qsort() and my_qsort2(). Since previously we relied on stdlib.h to provide a declaration for qsort(), a separate declaration for my_qsort() is now required. libmysql/Makefile.shared: Added mf_qsort.c to libmysql, since my_lib.c now uses my_qsort() instead of qsort(). myisam/ft_boolean_search.c: Replaced qsort2() with my_qsort2(). myisam/ft_nlq_search.c: Replaced qsort2() with my_qsort2(). myisam/myisampack.c: Replaced qsort() with my_qsort(). myisam/sort.c: Replaced qsort2() with my_qsort2(). mysys/mf_keycache.c: Replaced qsort() with my_qsort(). mysys/mf_qsort.c: Renamed qsort() to my_qsort() and qsort2() to my_qsort2(). mysys/mf_sort.c: Replaced qsort2() with my_qsort2(). mysys/my_lib.c: Replaced qsort() with my_qsort(). mysys/queues.c: Replaced qsort2() with my_qsort2(). sql/item_cmpfunc.cc: Replaced qsort2() with my_qsort2(). sql/item_cmpfunc.h: Replaced qsort2() with my_qsort2(). sql/opt_range.cc: Replaced qsort() with my_qsort(). sql/records.cc: Replaced qsort() with my_qsort(). sql/sql_acl.cc: Replaced qsort() with my_qsort(). sql/sql_array.h: Replaced qsort() with my_qsort(). sql/sql_help.cc: Replaced qsort() with my_qsort(). sql/sql_select.cc: Replaced qsort() with my_qsort(). sql/examples/ha_tina.cc: Replaced qsort() with my_qsort(). sql/sql_table.cc: Replaced qsort() with my_qsort().		18 years ago
..
CMakeLists.txt	my_strtoll10-x86.s:	19 years ago
ha_example.cc	BUG#26138 - REPAIR TABLE with option USE_FRM erases all records in	19 years ago
ha_example.h	Many files:	19 years ago
ha_tina.cc	Fix for bug #31207: Test "join_nested" shows different strategy on IA64	18 years ago
ha_tina.h	Many files:	19 years ago