130 lines
3.1 KiB
C++
130 lines
3.1 KiB
C++
/*
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* This file is a part of morm
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* and is distributed under the 2-Clause BSD licence.
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* Author: Tomasz Sowa <t.sowa@ttmath.org>
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*/
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/*
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* Copyright (c) 2018-2022, Tomasz Sowa
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "postgresqlexpression.h"
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namespace morm
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{
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void PostgreSQLExpression::before_field_value_string(const FT & field_type, ModelEnv * model_env)
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{
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if( field_type.is_binary() )
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{
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(*out_stream) << "'\\x";
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}
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else
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if( field_type.is_hexadecimal() )
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{
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(*out_stream) << "'";
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}
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else
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if( field_type.is_numeric() )
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{
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(*out_stream) << "'";
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}
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else
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{
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(*out_stream) << "E'";
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if( model_env && model_env->add_prefix_percent )
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(*out_stream) << '%';
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}
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}
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void PostgreSQLExpression::after_field_value_string(const FT & field_type, ModelEnv * model_env)
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{
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if( model_env && model_env->add_postfix_percent )
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(*out_stream) << '%';
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(*out_stream) << "'";
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}
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bool PostgreSQLExpression::esc_char(wchar_t val, pt::TextStream & stream, const FT & field_type, ModelEnv * model_env)
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{
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if( model_env && model_env->use_escaping_for_like )
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{
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if( val == '%' )
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{
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stream << "\\\\%"; // gives: "\\%" (we are using a string form with E so we need to double backslashes here)
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return true;
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}
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else
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if( val == '_' )
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{
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stream << "\\\\_"; // gives: "\\_"
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return true;
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}
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else
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if( val == '\\' )
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{
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stream << "\\\\\\\\"; // gives: "\\\\"
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return true;
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}
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}
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if( val == '\\' )
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{
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stream << "\\\\";
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return true;
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}
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else
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if( val == '\'' )
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{
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stream << "\\\'"; // don't use "''" because we use the method for PQconnectdb too
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return true;
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}
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else
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if( val == 0 )
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{
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// may put the replacement character to the stream?
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return true;
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}
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return false;
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}
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DbExpression & PostgreSQLExpression::page(pt::TextStream & stream, size_t page_number, size_t page_size)
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{
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stream << " OFFSET " << (page_number*page_size) << " LIMIT " << page_size << " ";
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return *this;
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}
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}
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