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69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
#include <boost/algorithm/string/replace.hpp>
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#include <Common/typeid_cast.h>
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#include <Common/quoteString.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 <IO/WriteHelpers.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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#include <Interpreters/addTypeConversionToAST.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int UNKNOWN_QUERY_PARAMETER;
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extern const int BAD_QUERY_PARAMETER;
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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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visitQueryParameter(child);
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else
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visit(child);
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}
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}
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const String & ReplaceQueryParameterVisitor::getParamValue(const String & name)
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{
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auto search = query_parameters.find(name);
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if (search != query_parameters.end())
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return search->second;
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else
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throw Exception("Substitution " + backQuote(name) + " is not set", ErrorCodes::UNKNOWN_QUERY_PARAMETER);
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}
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void ReplaceQueryParameterVisitor::visitQueryParameter(ASTPtr & ast)
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{
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const auto & ast_param = ast->as<ASTQueryParameter &>();
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const String & value = getParamValue(ast_param.name);
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const String & type_name = ast_param.type;
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const auto data_type = DataTypeFactory::instance().get(type_name);
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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->deserializeAsTextEscaped(temp_column, read_buffer, format_settings);
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if (!read_buffer.eof())
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throw Exception("Value " + value + " cannot be parsed as " + type_name + " for query parameter '" + ast_param.name + "'"
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" because it isn't parsed completely: only " + toString(read_buffer.count()) + " of " + toString(value.size()) + " bytes was parsed: "
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+ value.substr(0, read_buffer.count()), ErrorCodes::BAD_QUERY_PARAMETER);
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ast = addTypeConversionToAST(std::make_shared<ASTLiteral>(temp_column[0]), type_name);
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}
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}
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