2011-09-04 05:14:52 +00:00
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#pragma once
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2010-06-24 19:12:10 +00:00
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2017-04-01 09:19:00 +00:00
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#include <Parsers/IParserBase.h>
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2010-06-24 19:12:10 +00:00
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namespace DB
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{
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class ParserArray : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "array"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2010-06-24 19:12:10 +00:00
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};
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2017-05-27 17:29:55 +00:00
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/** If in parenthesis an expression from one element - returns this element in `node`;
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* or if there is a SELECT subquery in parenthesis, then this subquery returned in `node`;
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* otherwise returns `tuple` function from the contents of brackets.
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2010-06-24 19:12:10 +00:00
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*/
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class ParserParenthesisExpression : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "parenthesized expression"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2010-06-24 19:12:10 +00:00
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};
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2017-05-27 17:29:55 +00:00
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/** The SELECT subquery is in parenthesis.
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2012-08-22 18:46:09 +00:00
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*/
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class ParserSubquery : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "SELECT subquery"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2012-08-22 18:46:09 +00:00
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};
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2017-05-27 17:29:55 +00:00
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/** An identifier, for example, x_yz123 or `something special`
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2010-06-24 19:12:10 +00:00
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*/
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class ParserIdentifier : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "identifier"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2010-06-24 19:12:10 +00:00
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};
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2020-02-04 22:37:04 +00:00
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class ParserBareWord : public IParserBase
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{
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protected:
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const char * getName() const override { return "bare word"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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};
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2017-05-27 17:29:55 +00:00
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/** An identifier, possibly containing a dot, for example, x_yz123 or `something special` or Hits.EventTime
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2013-07-16 15:26:35 +00:00
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*/
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class ParserCompoundIdentifier : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "compound identifier"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2013-07-16 15:26:35 +00:00
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};
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2017-01-04 11:23:27 +00:00
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/// Just *
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class ParserAsterisk : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "asterisk"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2017-01-04 11:23:27 +00:00
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};
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/** Something like t.* or db.table.*
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*/
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class ParserQualifiedAsterisk : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "qualified asterisk"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2017-01-04 11:23:27 +00:00
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};
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2019-07-16 20:05:00 +00:00
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/** COLUMNS('<regular expression>')
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2019-07-12 11:17:38 +00:00
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*/
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2019-07-21 17:03:58 +00:00
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class ParserColumnsMatcher : public IParserBase
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2019-07-12 11:17:38 +00:00
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "COLUMNS matcher"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2019-07-12 11:17:38 +00:00
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};
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2017-01-04 11:23:27 +00:00
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2017-05-27 17:29:55 +00:00
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/** A function, for example, f(x, y + 1, g(z)).
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* Or an aggregate function: sum(x + f(y)), corr(x, y). The syntax is the same as the usual function.
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* Or a parametric aggregate function: quantile(0.9)(x + y).
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* Syntax - two pairs of parentheses instead of one. The first is for parameters, the second for arguments.
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* For functions, the DISTINCT modifier can be specified, for example, count(DISTINCT x, y).
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2010-06-24 19:12:10 +00:00
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*/
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class ParserFunction : public IParserBase
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{
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2019-11-18 16:49:23 +00:00
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public:
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ParserFunction(bool allow_function_parameters_ = true) : allow_function_parameters(allow_function_parameters_) {}
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2010-06-24 19:12:10 +00:00
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "function"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2019-11-18 16:49:23 +00:00
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bool allow_function_parameters;
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2010-06-24 19:12:10 +00:00
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};
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2018-12-13 15:26:28 +00:00
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class ParserCodecDeclarationList : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "codec declaration list"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2018-12-13 15:26:28 +00:00
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};
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/** Parse compression codec
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* CODEC(ZSTD(2))
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*/
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class ParserCodec : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "codec"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2018-12-13 15:26:28 +00:00
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};
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2015-12-24 17:14:10 +00:00
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class ParserCastExpression : public IParserBase
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{
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protected:
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2018-06-07 20:25:38 +00:00
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const char * getName() const override { return "CAST expression"; }
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2017-07-10 03:28:12 +00:00
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2015-12-24 17:14:10 +00:00
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};
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2018-12-10 12:54:02 +00:00
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class ParserSubstringExpression : public IParserBase
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{
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protected:
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const char * getName() const override { return "SUBSTRING expression"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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};
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2018-12-13 11:50:37 +00:00
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class ParserTrimExpression : public IParserBase
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{
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protected:
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const char * getName() const override { return "TRIM expression"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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};
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2018-12-13 09:34:12 +00:00
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class ParserLeftExpression : public IParserBase
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{
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protected:
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const char * getName() const override { return "LEFT expression"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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};
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class ParserRightExpression : public IParserBase
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{
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protected:
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const char * getName() const override { return "RIGHT expression"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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};
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2018-04-13 19:35:08 +00:00
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class ParserExtractExpression : public IParserBase
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{
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protected:
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2018-06-07 20:25:38 +00:00
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const char * getName() const override { return "EXTRACT expression"; }
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2018-04-13 19:35:08 +00:00
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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};
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2018-12-19 11:37:14 +00:00
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class ParserDateAddExpression : public IParserBase
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{
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protected:
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const char * getName() const override { return "DATE_ADD expression"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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};
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2018-12-18 14:40:30 +00:00
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class ParserDateDiffExpression : public IParserBase
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{
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protected:
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const char * getName() const override { return "DATE_DIFF expression"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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};
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2010-06-24 19:12:10 +00:00
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2017-01-23 15:55:56 +00:00
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/** NULL literal.
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2010-06-24 19:12:10 +00:00
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*/
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class ParserNull : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "NULL"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2010-06-24 19:12:10 +00:00
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};
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2017-01-23 15:55:56 +00:00
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/** Numeric literal.
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2010-06-24 19:12:10 +00:00
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*/
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class ParserNumber : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "number"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2010-06-24 19:12:10 +00:00
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};
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2017-01-23 15:55:56 +00:00
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/** Unsigned integer, used in right hand side of tuple access operator (x.1).
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2015-11-07 23:18:39 +00:00
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*/
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class ParserUnsignedInteger : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "unsigned integer"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2015-11-07 23:18:39 +00:00
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};
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2010-06-24 19:12:10 +00:00
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2017-01-23 15:55:56 +00:00
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/** String in single quotes.
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2010-06-24 19:12:10 +00:00
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*/
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class ParserStringLiteral : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "string literal"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2015-06-29 04:54:52 +00:00
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};
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2017-05-27 17:29:55 +00:00
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/** An array of literals.
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* Arrays can also be parsed as an application of [] operator.
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* But parsing the whole array as a whole constant seriously speeds up the analysis of expressions in the case of very large arrays.
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* We try to parse the array as an array of literals first (fast path),
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* and if it did not work out (when the array consists of complex expressions) - parse as an application of [] operator (slow path).
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2015-06-29 04:54:52 +00:00
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*/
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class ParserArrayOfLiterals : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "array"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2010-06-24 19:12:10 +00:00
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};
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2017-05-27 17:29:55 +00:00
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/** The literal is one of: NULL, UInt64, Int64, Float64, String.
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2010-06-24 19:12:10 +00:00
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*/
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class ParserLiteral : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "literal"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2010-06-24 19:12:10 +00:00
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};
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2017-05-27 17:29:55 +00:00
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/** The alias is the identifier before which `AS` comes. For example: AS x_yz123.
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2011-11-06 04:21:09 +00:00
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*/
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2018-06-07 20:25:38 +00:00
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class ParserAlias : public IParserBase
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2011-11-06 04:21:09 +00:00
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{
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2015-11-08 00:28:12 +00:00
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public:
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2018-06-07 20:25:38 +00:00
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ParserAlias(bool allow_alias_without_as_keyword_)
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2017-04-01 07:20:54 +00:00
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: allow_alias_without_as_keyword(allow_alias_without_as_keyword_) {}
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2018-06-07 20:25:38 +00:00
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private:
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static const char * restricted_keywords[];
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2017-04-01 07:20:54 +00:00
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bool allow_alias_without_as_keyword;
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2015-11-08 00:28:12 +00:00
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "alias"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2011-11-06 04:21:09 +00:00
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};
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2019-05-25 13:43:52 +00:00
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/** Prepared statements.
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2019-05-18 21:07:23 +00:00
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* Parse query with parameter expression {name:type}.
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*/
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2019-05-25 13:43:52 +00:00
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class ParserSubstitution : public IParserBase
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2019-05-18 21:07:23 +00:00
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "substitution"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2019-05-18 21:07:23 +00:00
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};
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2017-05-27 17:29:55 +00:00
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/** The expression element is one of: an expression in parentheses, an array, a literal, a function, an identifier, an asterisk.
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2010-06-24 19:12:10 +00:00
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*/
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class ParserExpressionElement : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "element of expression"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2010-06-24 19:12:10 +00:00
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};
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2017-05-27 17:29:55 +00:00
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/** An expression element, possibly with an alias, if appropriate.
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2011-11-06 04:21:09 +00:00
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*/
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2018-06-07 20:25:38 +00:00
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class ParserWithOptionalAlias : public IParserBase
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2011-11-06 04:21:09 +00:00
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{
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2011-11-06 20:47:07 +00:00
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public:
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2019-07-22 19:21:07 +00:00
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ParserWithOptionalAlias(ParserPtr && elem_parser_, bool allow_alias_without_as_keyword_)
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2019-10-31 15:22:48 +00:00
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: elem_parser(std::move(elem_parser_)), allow_alias_without_as_keyword(allow_alias_without_as_keyword_) {}
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2011-11-06 04:21:09 +00:00
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protected:
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2017-04-01 07:20:54 +00:00
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ParserPtr elem_parser;
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bool allow_alias_without_as_keyword;
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2015-04-11 03:10:23 +00:00
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "element of expression with optional alias"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2011-11-06 04:21:09 +00:00
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};
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2017-03-12 12:56:59 +00:00
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/** Element of ORDER BY expression - same as expression element, but in addition, ASC[ENDING] | DESC[ENDING] could be specified
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* and optionally, NULLS LAST|FIRST
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* and optionally, COLLATE 'locale'.
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2019-04-21 03:36:59 +00:00
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* and optionally, WITH FILL [FROM x] [TO y] [STEP z]
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2011-09-04 05:14:52 +00:00
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*/
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class ParserOrderByElement : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "element of ORDER BY expression"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2011-09-04 05:14:52 +00:00
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};
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2010-06-24 19:12:10 +00:00
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2019-10-07 16:23:16 +00:00
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/** Parser for function with arguments like KEY VALUE (space separated)
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2019-10-08 13:26:15 +00:00
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* no commas alowed, just space-separated pairs.
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2019-10-07 16:23:16 +00:00
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*/
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class ParserFunctionWithKeyValueArguments : public IParserBase
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{
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protected:
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const char * getName() const override { return "function with key-value arguments"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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};
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/** Data type or table engine, possibly with parameters. For example, UInt8 or see examples from ParserIdentifierWithParameters
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* Parse result is ASTFunction, with or without arguments.
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*/
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class ParserIdentifierWithOptionalParameters : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override{ return "identifier with optional parameters"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2019-10-07 16:23:16 +00:00
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};
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2019-10-09 13:02:05 +00:00
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/** Element of TTL expression - same as expression element, but in addition,
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* TO DISK 'xxx' | TO VOLUME 'xxx' | DELETE could be specified
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*/
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class ParserTTLElement : public IParserBase
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{
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protected:
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2020-01-21 08:54:26 +00:00
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const char * getName() const override { return "element of TTL expression"; }
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bool parseImpl(Pos & pos, ASTPtr & node, Expected & expected) override;
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2019-10-09 13:02:05 +00:00
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};
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2011-09-04 05:14:52 +00:00
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}
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