2010-06-28 13:44:42 +00:00
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#include <sstream>
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#include <boost/variant/static_visitor.hpp>
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#include <Poco/NumberFormatter.h>
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2011-03-29 17:56:51 +00:00
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#include <mysqlxx/Manip.h>
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2010-06-28 13:44:42 +00:00
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#include <DB/Core/Exception.h>
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#include <DB/Core/ErrorCodes.h>
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#include <DB/Parsers/formatAST.h>
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namespace DB
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{
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void formatAST(const IAST & ast, std::ostream & s)
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{
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const ASTSelectQuery * select = dynamic_cast<const ASTSelectQuery *>(&ast);
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if (select)
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{
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formatAST(*select, s);
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return;
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}
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const ASTExpressionList * exp_list = dynamic_cast<const ASTExpressionList *>(&ast);
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if (exp_list)
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{
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formatAST(*exp_list, s);
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return;
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}
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const ASTFunction * func = dynamic_cast<const ASTFunction *>(&ast);
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if (func)
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{
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formatAST(*func, s);
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return;
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}
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const ASTIdentifier * id = dynamic_cast<const ASTIdentifier *>(&ast);
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if (id)
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{
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formatAST(*id, s);
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return;
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}
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const ASTLiteral * lit = dynamic_cast<const ASTLiteral *>(&ast);
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if (lit)
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{
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formatAST(*lit, s);
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return;
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}
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throw DB::Exception("Unknown element in AST", ErrorCodes::UNKNOWN_ELEMENT_IN_AST);
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}
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void formatAST(const ASTSelectQuery & ast, std::ostream & s)
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{
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s << "SELECT ";
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formatAST(*ast.select, s);
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}
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void formatAST(const ASTExpressionList & ast, std::ostream & s)
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{
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for (ASTs::const_iterator it = ast.children.begin(); it != ast.children.end(); ++it)
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{
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if (it != ast.children.begin())
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s << ", ";
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formatAST(**it, s);
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}
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}
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void formatAST(const ASTFunction & ast, std::ostream & s)
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{
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s << ast.name << '(';
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formatAST(*ast.arguments, s);
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s << ')';
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}
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void formatAST(const ASTIdentifier & ast, std::ostream & s)
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{
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s << ast.name;
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}
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void formatAST(const ASTLiteral & ast, std::ostream & s)
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{
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s << boost::apply_visitor(FieldVisitorToString(), ast.value);
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}
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}
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