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ddl, planner: support ALTER TABLE
without use db (#18784)
#19471
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zz-jason
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pingcap:release-4.0
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ti-srebot:release-4.0-c6b80eaeb001
Sep 2, 2020
Merged
ddl, planner: support ALTER TABLE
without use db (#18784)
#19471
zz-jason
merged 2 commits into
pingcap:release-4.0
from
ti-srebot:release-4.0-c6b80eaeb001
Sep 2, 2020
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Signed-off-by: ti-srebot <ti-srebot@pingcap.com>
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LGTM
AilinKid
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LGTM
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sig/sql-infra
SIG: SQL Infra
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cherry-pick #18784 to release-4.0
What problem does this PR solve?
Issue Number: close #18756
Problem Summary:
alter table db.t1 add constraint fk foreign key (c2) references t2(c1)
without first executinguse db
, TiDB will reportNo database selected
. That is becausec2
has no schema(dbName), nor do we have a globalCurrentDB
. But mysql will try to use dbName fromdb.t1
. Manually tested.Check List
Tests
Release note
alter table db.t1 add constraint fk foreign key (c2) references t2(c1)
like statements without first executinguse db