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398
build/lib/mysql/mysql-test/t/ps_ddl1.test
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398
build/lib/mysql/mysql-test/t/ps_ddl1.test
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#
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# Testing the behavior of 'PREPARE', 'DDL', 'EXECUTE' scenarios
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#
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# There are several subtests which are probably "superfluous" because a DDL
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# statement before the EXECUTE <prepared stmt handle> contained a keyword
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# or action (Example: Alter) which causes that all prepared statements using
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# the modified object are reprepared before execution.
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# Please do not delete these subtests if they disturb. Just disable them by
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# if (0)
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# {
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# <tests to disable>
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# }.
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# There might be future optimisations of the server which decrease the amount
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# of unneeded reprepares or skip unneeded prepare steps and than these subtests
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# might become valuable.
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# Example:
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# Every preceding ALTER TABLE seems to cause a reprepare.
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# But if the ALTER only changed the table comment ...
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#
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# Created: 2008-04-18 mleich
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#
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--disable_warnings
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drop temporary table if exists t1;
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drop table if exists t1, t2;
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drop procedure if exists p_verify_reprepare_count;
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drop procedure if exists p1;
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drop function if exists f1;
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drop view if exists t1;
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drop schema if exists mysqltest;
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--enable_warnings
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delimiter |;
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create procedure p_verify_reprepare_count(expected int)
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begin
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declare old_reprepare_count int default @reprepare_count;
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select variable_value from
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information_schema.session_status where
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variable_name='com_stmt_reprepare'
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into @reprepare_count;
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if old_reprepare_count + expected <> @reprepare_count then
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select concat("Expected: ", expected,
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", actual: ", @reprepare_count - old_reprepare_count)
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as "ERROR";
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else
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select '' as "SUCCESS";
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end if;
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end|
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delimiter ;|
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set @reprepare_count= 0;
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flush status;
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--disable_warnings
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drop table if exists t1;
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--disable_warnings
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--echo # Column added or dropped is not within the list of selected columns
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--echo # or table comment has changed.
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--echo # A reprepare is probably not needed.
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create table t1 (a int, b int);
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prepare stmt from "select a from t1";
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execute stmt;
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call p_verify_reprepare_count(0);
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alter table t1 add column c int;
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execute stmt;
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call p_verify_reprepare_count(1);
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execute stmt;
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call p_verify_reprepare_count(0);
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alter table t1 drop column b;
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execute stmt;
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call p_verify_reprepare_count(1);
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execute stmt;
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call p_verify_reprepare_count(0);
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alter table t1 comment "My best table";
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execute stmt;
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call p_verify_reprepare_count(1);
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execute stmt;
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call p_verify_reprepare_count(0);
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drop table t1;
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deallocate prepare stmt;
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--echo # Selects using the table at various positions, inser,update ...
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--echo # + the table disappears
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create table t1 (a int);
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# Attention:
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# "truncate" must have the first position (= executed as last prepared
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# statement), because it recreates the table which has leads to reprepare
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# (is this really needed) of all statements.
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prepare stmt1 from "truncate t1";
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prepare stmt2 from "select 1 as my_column from t1";
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prepare stmt3 from "select 1 as my_column from (select * from t1) as t2";
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prepare stmt4 from
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"select 1 as my_column from (select 1) as t2 where exists (select 1 from t1)";
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prepare stmt5 from "select * from (select 1 as b) as t2, t1";
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prepare stmt6 from "select * from t1 union all select 1.5";
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prepare stmt7 from "select 1 as my_column union all select 1 from t1";
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prepare stmt8 from "insert into t1 values(1),(2)";
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prepare stmt9 from "update t1 set a = 3 where a = 2";
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prepare stmt10 from "delete from t1 where a = 1";
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let ps_stmt_count= 10;
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--echo # Attention: Result logging is disabled.
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# Checks of correct results of statements are not the goal of this test.
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let $num= $ps_stmt_count;
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while ($num)
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{
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--disable_result_log
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eval execute stmt$num;
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--enable_result_log
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dec $num;
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}
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# There was no reprepare needed, because none of the objects has changed.
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call p_verify_reprepare_count(0);
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drop table t1;
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let $num= $ps_stmt_count;
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while ($num)
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{
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--error ER_NO_SUCH_TABLE
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eval execute stmt$num;
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dec $num;
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}
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# There was no reprepare needed, because the statement is no more applicable.
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call p_verify_reprepare_count(0);
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let $num= $ps_stmt_count;
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while ($num)
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{
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eval deallocate prepare stmt$num;
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dec $num;
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}
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--echo # Selects using the table at various positions, inser,update ...
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--echo # + layout change (drop column) which must cause a reprepare
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create table t1 (a int, b int);
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insert into t1 values(1,1),(2,2),(3,3);
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create table t2 like t1;
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insert into t1 values(2,2);
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prepare stmt1 from "select a,b from t1";
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prepare stmt2 from "select a,b from (select * from t1) as t1";
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prepare stmt3 from "select * from t1 where a = 2 and b = 2";
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prepare stmt4 from "select * from t2 where (a,b) in (select * from t1)";
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prepare stmt5 from "select * from t1 union select * from t2";
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prepare stmt6 from "select * from t1 union all select * from t2";
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prepare stmt7 from "insert into t1 set a = 4, b = 4";
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prepare stmt8 from "insert into t1 select * from t2";
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let ps_stmt_count= 8;
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--echo # Attention: Result logging is disabled.
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# Checks of correct results of statements are not the goal of this test.
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let $num= $ps_stmt_count;
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while ($num)
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{
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--disable_result_log
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eval execute stmt$num;
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--enable_result_log
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dec $num;
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}
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call p_verify_reprepare_count(0);
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alter table t1 drop column b;
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--disable_abort_on_error
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let $num= $ps_stmt_count;
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while ($num)
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{
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eval execute stmt$num;
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# A reprepare is needed, because layout change of t1 affects statement.
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call p_verify_reprepare_count(1);
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dec $num;
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}
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let $num= $ps_stmt_count;
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while ($num)
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{
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eval execute stmt$num;
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call p_verify_reprepare_count(1);
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dec $num;
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}
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--echo # Why does the INSERT ... SELECT does not get a reprepare or is
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--echo # only the counter not incremented?
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eval execute stmt8;
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call p_verify_reprepare_count(1);
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--enable_abort_on_error
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alter table t2 add column c int;
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--error ER_WRONG_VALUE_COUNT_ON_ROW
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eval execute stmt8;
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call p_verify_reprepare_count(1);
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let $num= $ps_stmt_count;
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while ($num)
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{
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eval deallocate prepare stmt$num;
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dec $num;
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}
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drop table t1;
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drop table t2;
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--echo # select AVG(<col>) + optimizer uses index meets loss of the index
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create table t1 (a int, b int, primary key(b),unique index t1_unq_idx(a));
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# We need an index which is not converted to PRIMARY KEY (becomes in
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# case of InnoDB the key used for table clustering).
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insert into t1 set a = 0, b = 0;
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insert into t1 select a + 1, b + 1 from t1;
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insert into t1 select a + 2, b + 2 from t1;
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insert into t1 select a + 4, b + 4 from t1;
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insert into t1 select a + 8, b + 8 from t1;
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# "using index" optimizer strategy is intended
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let $possible_keys=
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query_get_value(explain select avg(a) from t1, possible_keys, 1);
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let $extra=
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query_get_value(explain select avg(a) from t1, Extra, 1);
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--echo # Optimizer strategy: Possible keys = $possible_keys , Extra = $extra
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prepare stmt from "select avg(a) from t1";
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execute stmt;
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call p_verify_reprepare_count(0);
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execute stmt;
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call p_verify_reprepare_count(0);
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alter table t1 drop index t1_unq_idx;
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let $possible_keys=
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query_get_value(explain select avg(a) from t1, possible_keys, 1);
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let $extra=
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query_get_value(explain select avg(a) from t1, Extra, 1);
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--echo # Optimizer strategy: Possible keys = $possible_keys , Extra = $extra
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execute stmt;
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call p_verify_reprepare_count(1);
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execute stmt;
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call p_verify_reprepare_count(0);
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--echo # select AVG(<col>) + optimizer uses table scan meets a new index
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alter table t1 add unique index t1_unq_idx(a);
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let $possible_keys=
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query_get_value(explain select avg(a) from t1, possible_keys, 1);
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let $extra=
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query_get_value(explain select avg(a) from t1, Extra, 1);
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--echo # Optimizer strategy: Possible keys = $possible_keys , Extra = $extra
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execute stmt;
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call p_verify_reprepare_count(1);
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execute stmt;
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call p_verify_reprepare_count(0);
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deallocate prepare stmt;
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drop table t1;
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--echo # table replaced by not updatable view - Insert
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create table t1 (a int);
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prepare stmt from "insert into t1 values(1)";
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execute stmt;
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call p_verify_reprepare_count(0);
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drop table t1;
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create view t1 as select 1;
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--error ER_NON_INSERTABLE_TABLE
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execute stmt;
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call p_verify_reprepare_count(1);
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drop view t1;
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create table t2 (a int);
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create view t1 as select * from t2 with check option;
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execute stmt;
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call p_verify_reprepare_count(1);
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execute stmt;
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call p_verify_reprepare_count(0);
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select * from t1;
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deallocate prepare stmt;
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drop view t1;
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drop table t2;
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--echo =====================================================================
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--echo Some freestyle tests
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--echo =====================================================================
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create temporary table t1 as select 1 as a;
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delimiter |;
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create procedure p1()
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begin
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drop temporary table t1;
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end|
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create function f1() returns int
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begin
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call p1();
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return 1;
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end|
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delimiter ;|
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prepare stmt from "select f1() as my_column, a from t1";
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--error ER_CANT_REOPEN_TABLE
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execute stmt;
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call p_verify_reprepare_count(0);
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select * from t1;
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prepare stmt from "select a, f1() as my_column from t1";
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--error ER_CANT_REOPEN_TABLE
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execute stmt;
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call p_verify_reprepare_count(0);
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select * from t1;
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prepare stmt from "select f1() as my_column, count(*) from t1";
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--error ER_CANT_REOPEN_TABLE
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execute stmt;
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call p_verify_reprepare_count(0);
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select * from t1;
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prepare stmt from "select count(*), f1() as my_column from t1";
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--error ER_CANT_REOPEN_TABLE
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execute stmt;
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call p_verify_reprepare_count(0);
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select * from t1;
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--echo # Execute fails, no drop of temporary table
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prepare stmt from "select 1 as my_column from (select 1) as t2
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where exists (select f1() from t1)";
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execute stmt;
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call p_verify_reprepare_count(0);
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execute stmt;
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call p_verify_reprepare_count(0);
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select * from t1;
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--echo # Execute drops temporary table
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prepare stmt from "select f1()";
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execute stmt;
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call p_verify_reprepare_count(0);
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--error ER_BAD_TABLE_ERROR
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execute stmt;
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call p_verify_reprepare_count(0);
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drop function f1;
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drop procedure p1;
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deallocate prepare stmt;
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--echo # Execute fails, temporary table is not replaced by another
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create temporary table t1 as select 1 as a;
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delimiter |;
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create procedure p1()
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begin
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drop temporary table t1;
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create temporary table t1 as select 'abc' as a;
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end|
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create function f1() returns int
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begin
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call p1();
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return 1;
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end|
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delimiter ;|
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prepare stmt from "select count(*), f1() as my_column from t1";
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--error ER_CANT_REOPEN_TABLE
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execute stmt;
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call p_verify_reprepare_count(0);
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select * from t1;
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deallocate prepare stmt;
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prepare stmt from "call p1";
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execute stmt;
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drop procedure p1;
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create schema mysqltest;
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delimiter |;
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create procedure mysqltest.p1()
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begin
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drop schema mysqltest;
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create schema mysqltest;
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end|
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delimiter ;|
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--error ER_SP_DOES_NOT_EXIST
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execute stmt;
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call p_verify_reprepare_count(1);
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--error ER_SP_DOES_NOT_EXIST
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execute stmt;
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call p_verify_reprepare_count(0);
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deallocate prepare stmt;
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drop schema mysqltest;
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drop temporary table t1;
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# Bug#36089 drop temp table in SP called by function, crash
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# Note: A non prepared "select 1 from t1 having count(*) = f1();" is sufficient.
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if (0)
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{
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create temporary table t1 as select 1 as a;
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prepare stmt from "select 1 from t1 having count(*) = f1()";
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execute stmt;
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call p_verify_reprepare_count(0);
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deallocate prepare stmt;
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drop temporary table t1;
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}
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--echo # Cleanup
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--echo #
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--disable_warnings
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drop temporary table if exists t1;
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drop table if exists t1, t2;
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drop procedure if exists p_verify_reprepare_count;
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drop procedure if exists p1;
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drop function if exists f1;
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drop view if exists t1;
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drop schema if exists mysqltest;
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--enable_warnings
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