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Bug#4118: multi-table UPDATE takes WRITE lock on read table

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Ensures that WRITE lock is not obtained on all tables referenced.
This commit is contained in:
antony@ltantony.rdg.cyberkinetica.homeunix.net
2004-10-03 00:20:47 +01:00
parent 5cf8e9d769
commit 2973a047ea
7 changed files with 155 additions and 33 deletions
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mysql-test/r/multi_update.result
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@@ -151,7 +151,6 @@ Table 't2' was locked with a READ lock and can't be updated
UPDATE t1,t2 SET t1.d=t2.d,t2.d=30 WHERE t1.n=t2.n;
Table 't2' was locked with a READ lock and can't be updated
UPDATE t1,t2 SET t1.d=t2.d WHERE t1.n=t2.n;
Table 't2' was locked with a READ lock and can't be updated
unlock tables;
LOCK TABLES t1 write, t2 write;
UPDATE t1,t2 SET t1.d=t2.d WHERE t1.n=t2.n;