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Merge pull request #23483 from hexiaoting/dev_alter_bugfix
Fix bug when modify column without type
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commit
f27002b1be
@ -1578,7 +1578,8 @@ void MergeTreeData::checkAlterIsPossible(const AlterCommands & commands, Context
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const IDataType * new_type = command.data_type.get();
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const IDataType * old_type = old_types[command.column_name];
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checkVersionColumnTypesConversion(old_type, new_type, command.column_name);
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if (new_type)
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checkVersionColumnTypesConversion(old_type, new_type, command.column_name);
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/// No other checks required
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continue;
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@ -0,0 +1 @@
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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
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@ -0,0 +1,6 @@
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DROP TABLE IF EXISTS alter_test;
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CREATE TABLE alter_test (a Int32, b DateTime) ENGINE = ReplacingMergeTree(b) ORDER BY a;
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ALTER TABLE alter_test MODIFY COLUMN `b` DateTime DEFAULT now();
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ALTER TABLE alter_test MODIFY COLUMN `b` DEFAULT now() + 1;
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SHOW CREATE TABLE alter_test;
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DROP TABLE alter_test;
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