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41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
#include <Parsers/ASTExpressionList.h>
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#include <Parsers/ASTIdentifier_fwd.h>
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#include <Parsers/ASTSubquery.h>
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#include <Parsers/ASTWithElement.h>
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#include <Parsers/CommonParsers.h>
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#include <Parsers/ExpressionElementParsers.h>
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#include <Parsers/ExpressionListParsers.h>
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#include <Parsers/ParserWithElement.h>
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namespace DB
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{
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bool ParserWithElement::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
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{
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ParserIdentifier s_ident;
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ParserKeyword s_as("AS");
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ParserSubquery s_subquery;
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auto old_pos = pos;
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if (ASTPtr name, subquery;
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s_ident.parse(pos, name, expected) && s_as.ignore(pos, expected) && s_subquery.parse(pos, subquery, expected))
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{
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auto with_element = std::make_shared<ASTWithElement>();
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tryGetIdentifierNameInto(name, with_element->name);
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with_element->subquery = subquery;
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with_element->children.push_back(with_element->subquery);
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node = with_element;
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}
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else
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{
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pos = old_pos;
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ParserExpressionWithOptionalAlias s_expr(false);
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if (!s_expr.parse(pos, node, expected))
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return false;
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}
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return true;
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}
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}
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