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Table before collecting engine independent statistics now is reopened in read mode, InnoDB allow write operations in this case.
25 lines
760 B
Plaintext
25 lines
760 B
Plaintext
#
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# MDEV-7901: re-implement analyze table for low impact
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#
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create table t1 (a int, b int, c int, key IDX1(a), key IDX2(a,b)) engine=myisam;
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insert into t1 select seq/10, seq/2, seq from seq_0_to_9;
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SET DEBUG_SYNC='statistics_collection_start1 SIGNAL analyzing WAIT_FOR written';
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analyze table t1 persistent for all;
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connect con1, localhost, root,,;
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connection con1;
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SET DEBUG_SYNC= 'now WAIT_FOR analyzing';
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select count(*) from t1;
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count(*)
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10
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insert into t1 values (333,333,333);
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SET DEBUG_SYNC= 'now SIGNAL written';
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connection default;
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Table Op Msg_type Msg_text
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status Table is already up to date
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select count(*) from t1;
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count(*)
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11
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set debug_sync='RESET';
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drop table t1;
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