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MDEV-11114 Cannot drop column referenced by CHECK constraint

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SQL Standard behavior for DROP COLUMN xxx RESTRICT:
* If a constraint (UNIQUE or CHECK) uses only the dropped column,
  it's automatically dropped too. If it uses many columns - an error.
This commit is contained in:
Sergei Golubchik
2017-08-12 18:52:38 +02:00
parent 28ddc9b3bb
commit 04b288ae47
17 changed files with 121 additions and 200 deletions
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24
mysql-test/suite/funcs_1/r/is_key_column_usage.result
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@ -345,28 +345,6 @@ db_datadict my_idx db_datadict t1_my_tablex f4 1
db_datadict my_idx db_datadict t1_my_tablex first_col 2
db_datadict PRIMARY db_datadict t1_my_tablex first_col 1
db_datadict PRIMARY db_datadict t1_my_tablex f2 2
SELECT constraint_schema, constraint_name, table_schema,
table_name, column_name, ordinal_position
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY constraint_schema, constraint_name, table_schema,
table_name, ordinal_position;
constraint_schema constraint_name table_schema table_name column_name ordinal_position
db_datadict my_idx db_datadict t1_my_tablex f4 1
db_datadict my_idx db_datadict t1_my_tablex first_col 2
db_datadict PRIMARY db_datadict t1_my_tablex first_col 1
db_datadict PRIMARY db_datadict t1_my_tablex f2 2
ALTER TABLE db_datadict.t1_my_tablex
DROP COLUMN first_col;
SELECT constraint_schema, constraint_name, table_schema,
table_name, column_name, ordinal_position
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
ORDER BY constraint_schema, constraint_name, table_schema,
table_name, ordinal_position;
constraint_schema constraint_name table_schema table_name column_name ordinal_position
db_datadict my_idx db_datadict t1_my_tablex f4 1
db_datadict PRIMARY db_datadict t1_my_tablex f2 1
SELECT table_name, column_name
FROM information_schema.key_column_usage
WHERE table_name = 't1_my_tablex'
@ -374,6 +352,8 @@ ORDER BY table_name, column_name;
table_name column_name
t1_my_tablex f2
t1_my_tablex f4
t1_my_tablex first_col
t1_my_tablex first_col
DROP TABLE db_datadict.t1_my_tablex;
SELECT table_name, column_name
FROM information_schema.key_column_usage