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63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
#include <boost/algorithm/string/replace.hpp>
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#include <Common/typeid_cast.h>
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#include <Columns/IColumn.h>
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#include <Core/Field.h>
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#include <DataTypes/IDataType.h>
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#include <DataTypes/DataTypeFactory.h>
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#include <Formats/FormatSettings.h>
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#include <IO/ReadBufferFromString.h>
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#include <Parsers/ASTLiteral.h>
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#include <Parsers/ASTQueryParameter.h>
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#include <Interpreters/ReplaceQueryParameterVisitor.h>
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namespace DB
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{
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void ReplaceQueryParameterVisitor::visit(ASTPtr & ast)
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{
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for (auto & child : ast->children)
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{
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if (child->as<ASTQueryParameter>())
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visitQP(child);
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else
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visit(child);
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}
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}
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String ReplaceQueryParameterVisitor::getParamValue(const String & name)
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{
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auto search = parameters_substitution.find(name);
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if (search != parameters_substitution.end())
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return search->second;
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else
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throw Exception("Expected name '" + name + "' in argument --param_{name}", ErrorCodes::BAD_ARGUMENTS);
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}
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void ReplaceQueryParameterVisitor::visitQP(ASTPtr & ast)
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{
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auto ast_param = ast->as<ASTQueryParameter>();
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const String value = getParamValue(ast_param->name);
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String type = ast_param->type;
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/// Replacing all occurrences of types Date and DateTime with String.
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/// String comparison is used in "WHERE" conditions with this types.
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boost::replace_all(type, "DateTime", "String");
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boost::replace_all(type, "Date", "String");
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const auto data_type = DataTypeFactory::instance().get(type);
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auto temp_column_ptr = data_type->createColumn();
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IColumn & temp_column = *temp_column_ptr;
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ReadBufferFromString read_buffer{value};
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FormatSettings format_settings;
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data_type->deserializeAsWholeText(temp_column, read_buffer, format_settings);
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if (!read_buffer.eof())
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throw Exception("Expected correct value in parameter with name '" + ast_param->name + "'", ErrorCodes::BAD_ARGUMENTS);
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Field field = temp_column[0];
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ast = std::make_shared<ASTLiteral>(std::move(field));
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}
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}
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