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https://github.com/MariaDB/server.git
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6b0b4734d9
New more SP-locking friendly approach to handling locks in multi-update. Now we mark all tables of multi-update as needing write lock at parsing stage and if possible downgrade lock at execution stage (For its work SP-locking mechanism needs to know all lock types right after parsing stage).
42 lines
939 B
Text
42 lines
939 B
Text
use test;
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drop table if exists t1;
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create table t1 (s1 int, s2 int, s3 int);
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create procedure bug4934()
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begin
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insert into t1 values (1,0,1);
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end//
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use test;
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call bug4934();
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select * from t1;
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s1 s2 s3
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1 0 1
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drop table t1;
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create table t1 (s1 int, s2 int, s3 int);
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drop procedure bug4934;
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create procedure bug4934()
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begin
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end//
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select * from t1;
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s1 s2 s3
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call bug4934();
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select * from t1;
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s1 s2 s3
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drop table t1;
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drop procedure bug4934;
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drop procedure if exists bug9486;
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drop table if exists t1, t2;
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create table t1 (id1 int, val int);
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create table t2 (id2 int);
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create procedure bug9486()
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update t1, t2 set val= 1 where id1=id2;
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call bug9486();
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lock tables t2 write;
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call bug9486();
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show processlist;
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Id User Host db Command Time State Info
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# root localhost test Sleep # NULL
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# root localhost test Query # Locked call bug9486()
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# root localhost test Query # NULL show processlist
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unlock tables;
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drop procedure bug9486;
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drop table t1, t2;
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