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MDEV-15253: Default optimizer setting changes for MariaDB 10.4

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use_stat_tables= PREFERABLY
optimizer_use_condition_selectivity= 4
This commit is contained in:
Varun Gupta
2018-05-31 15:51:59 +05:30
committed by Varun Gupta
parent a25ce5ab4b
commit 93c360e3a5
248 changed files with 3685 additions and 1747 deletions
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12
mysql-test/suite/sys_vars/r/sysvars_server_embedded.result
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@ -2729,10 +2729,10 @@ ENUM_VALUE_LIST index_merge,index_merge_union,index_merge_sort_union,index_merge
READ_ONLY NO
COMMAND_LINE_ARGUMENT REQUIRED
VARIABLE_NAME OPTIMIZER_USE_CONDITION_SELECTIVITY
SESSION_VALUE 1
GLOBAL_VALUE 1
SESSION_VALUE 4
GLOBAL_VALUE 4
GLOBAL_VALUE_ORIGIN COMPILE-TIME
DEFAULT_VALUE 1
DEFAULT_VALUE 4
VARIABLE_SCOPE SESSION
VARIABLE_TYPE BIGINT UNSIGNED
VARIABLE_COMMENT Controls selectivity of which conditions the optimizer takes into account to calculate cardinality of a partial join when it searches for the best execution plan Meaning: 1 - use selectivity of index backed range conditions to calculate the cardinality of a partial join if the last joined table is accessed by full table scan or an index scan, 2 - use selectivity of index backed range conditions to calculate the cardinality of a partial join in any case, 3 - additionally always use selectivity of range conditions that are not backed by any index to calculate the cardinality of a partial join, 4 - use histograms to calculate selectivity of range conditions that are not backed by any index to calculate the cardinality of a partial join.5 - additionally use selectivity of certain non-range predicates calculated on record samples
@ -4507,10 +4507,10 @@ ENUM_VALUE_LIST OFF,ON
READ_ONLY NO
COMMAND_LINE_ARGUMENT OPTIONAL
VARIABLE_NAME USE_STAT_TABLES
SESSION_VALUE NEVER
GLOBAL_VALUE NEVER
SESSION_VALUE PREFERABLY
GLOBAL_VALUE PREFERABLY
GLOBAL_VALUE_ORIGIN COMPILE-TIME
DEFAULT_VALUE NEVER
DEFAULT_VALUE PREFERABLY
VARIABLE_SCOPE SESSION
VARIABLE_TYPE ENUM
VARIABLE_COMMENT Specifies how to use system statistics tables