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42 lines
1.5 KiB
Text
42 lines
1.5 KiB
Text
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================================================================================
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SETUP
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================================================================================
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connect con1, localhost, root,,;
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CREATE TABLE test.t1 (c1 INT);
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PREPARE stmt1 FROM "SELECT c1 FROM test.t1";
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EXECUTE stmt1;
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c1
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SHOW SESSION STATUS LIKE "%com_stmt_%prepare%";
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Variable_name Value
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Com_stmt_prepare 1
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Com_stmt_reprepare 0
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SELECT * FROM performance_schema.session_status WHERE VARIABLE_NAME LIKE "%com_stmt%";
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VARIABLE_NAME VARIABLE_VALUE
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Com_stmt_reprepare 0
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SELECT VARIABLE_VALUE INTO @count_global_reprepare_before
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FROM performance_schema.global_status
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WHERE VARIABLE_NAME LIKE "Com_stmt_reprepare";
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ALTER TABLE test.t1 ADD COLUMN c2 INTEGER;
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EXECUTE stmt1;
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c1
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SHOW SESSION STATUS LIKE "%com_stmt_%prepare%";
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Variable_name Value
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Com_stmt_prepare 2
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Com_stmt_reprepare 1
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SELECT * FROM performance_schema.session_status WHERE VARIABLE_NAME LIKE "%com_stmt%";
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VARIABLE_NAME VARIABLE_VALUE
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Com_stmt_reprepare 1
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SELECT VARIABLE_VALUE INTO @count_global_reprepare_after
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FROM performance_schema.global_status
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WHERE VARIABLE_NAME LIKE "Com_stmt_reprepare";
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SELECT @count_global_reprepare_after - @count_global_reprepare_before;
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@count_global_reprepare_after - @count_global_reprepare_before
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1
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================================================================================
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CLEANUP
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================================================================================
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DROP TABLE test.t1;
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disconnect con1;
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connection default;
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