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57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
#pragma once
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#include <Parsers/IParserBase.h>
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#include <Parsers/ExpressionElementParsers.h>
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namespace DB
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{
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/** Query like this:
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* ALTER TABLE [db.]name [ON CLUSTER cluster]
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* [ADD COLUMN col_name type [AFTER col_after],]
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* [DROP COLUMN col_to_drop, ...]
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* [CLEAR COLUMN col_to_clear [IN PARTITION partition],]
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* [MODIFY COLUMN col_to_modify type, ...]
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* [MODIFY PRIMARY KEY (a, b, c...)]
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* [COMMENT COLUMN col_name string]
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* [DROP|DETACH|ATTACH PARTITION|PART partition, ...]
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* [FETCH PARTITION partition FROM ...]
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* [FREEZE [PARTITION] [WITH NAME name]]
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* [DELETE WHERE ...]
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* [UPDATE col_name = expr, ... WHERE ...]
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*/
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class ParserAlterQuery : public IParserBase
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{
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protected:
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const char * getName() const { return "ALTER query"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected);
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};
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class ParserAlterCommandList : public IParserBase
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{
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protected:
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const char * getName() const { return "a list of ALTER commands"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected);
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};
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class ParserAlterCommand : public IParserBase
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{
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protected:
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const char * getName() const { return "ALTER command"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected);
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};
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/// Part of the UPDATE command of the form: col_name = expr
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class ParserAssignment : public IParserBase
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{
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protected:
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const char * getName() const { return "column assignment"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected);
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};
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}
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