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DROP TABLE IF EXISTS t1; set @is_enable_default = @@global.ndb_index_stat_enable; set @is_enable = 1; set @is_enable = NULL; # is_enable_on=0 is_enable_off=0 # ndb_index_stat_enable - before show global variables like 'ndb_index_stat_enable'; Variable_name Value ndb_index_stat_enable ON show local variables like 'ndb_index_stat_enable'; Variable_name Value ndb_index_stat_enable ON # ndb_index_stat_enable - after show global variables like 'ndb_index_stat_enable'; Variable_name Value ndb_index_stat_enable ON show local variables like 'ndb_index_stat_enable'; Variable_name Value ndb_index_stat_enable ON create table t1 ( a int primary key, b int, c int, key t1x1 (b), key t1x2 (c) ) engine=ndb partition by key (a) partitions 1; insert into t1 values (1,1,1),(2,1,1),(3,2,1),(4,2,1); analyze table t1; Table Op Msg_type Msg_text test.t1 analyze status OK select count(*) from t1 where b = 1; count(*) 2 select count(*) from t1 where c = 1; count(*) 4 show status like 'ndb_index_stat_cache%'; Variable_name Value Ndb_index_stat_cache_query 81 Ndb_index_stat_cache_clean 0 # restart cluster --initial # wait for mysqld set global ndb_dbg_check_shares=1; drop table if exists t1; Warnings: Note 1051 Unknown table 'test.t1' create table t1 ( a int primary key, b int, c int, key t1x1 (b), key t1x2 (c) ) engine=ndb partition by key (a) partitions 1; insert into t1 values (1,1,1),(2,1,1),(3,2,1),(4,2,1); analyze table t1; Table Op Msg_type Msg_text test.t1 analyze status OK select count(*) from t1 where b = 1; count(*) 2 select count(*) from t1 where c = 1; count(*) 4 show status like 'ndb_index_stat_cache%'; Variable_name Value Ndb_index_stat_cache_query 81 Ndb_index_stat_cache_clean 0 drop table t1; set @is_enable = @is_enable_default; set @is_enable = NULL; # is_enable_on=0 is_enable_off=0 # ndb_index_stat_enable - before show global variables like 'ndb_index_stat_enable'; Variable_name Value ndb_index_stat_enable ON show local variables like 'ndb_index_stat_enable'; Variable_name Value ndb_index_stat_enable ON # ndb_index_stat_enable - after show global variables like 'ndb_index_stat_enable'; Variable_name Value ndb_index_stat_enable ON show local variables like 'ndb_index_stat_enable'; Variable_name Value ndb_index_stat_enable ON