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Merge pull request #23483 from hexiaoting/dev_alter_bugfix

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Fix bug when modify column without type
This commit is contained in:
Maksim Kita 2021-04-23 00:24:36 +03:00 committed by GitHub
commit f27002b1be
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3 changed files with 9 additions and 1 deletions
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3
src/Storages/MergeTree/MergeTreeData.cpp
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@ -1578,7 +1578,8 @@ void MergeTreeData::checkAlterIsPossible(const AlterCommands & commands, Context
const IDataType * new_type = command.data_type.get(); const IDataType * new_type = command.data_type.get();
const IDataType * old_type = old_types[command.column_name]; const IDataType * old_type = old_types[command.column_name];
checkVersionColumnTypesConversion(old_type, new_type, command.column_name); if (new_type)
checkVersionColumnTypesConversion(old_type, new_type, command.column_name);
/// No other checks required /// No other checks required
continue; continue;

1
tests/queries/0_stateless/01846_alter_column_without_type_bugfix.reference Normal file
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@ -0,0 +1 @@
CREATE TABLE default.alter_test\n(\n `a` Int32,\n `b` DateTime DEFAULT now() + 1\n)\nENGINE = ReplacingMergeTree(b)\nORDER BY a\nSETTINGS index_granularity = 8192

6
tests/queries/0_stateless/01846_alter_column_without_type_bugfix.sql Normal file
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@ -0,0 +1,6 @@
DROP TABLE IF EXISTS alter_test;
CREATE TABLE alter_test (a Int32, b DateTime) ENGINE = ReplacingMergeTree(b) ORDER BY a;
ALTER TABLE alter_test MODIFY COLUMN `b` DateTime DEFAULT now();
ALTER TABLE alter_test MODIFY COLUMN `b` DEFAULT now() + 1;
SHOW CREATE TABLE alter_test;
DROP TABLE alter_test;