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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2009 Sun Microsystems
*
* Authors:
*
* Jay Pipes <joinfu@sun.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
*
* Declarations of various routines that can be used to convert
* Transaction messages to other formats, including SQL statements.
*/
#ifndef DRIZZLED_MESSAGE_STATEMENT_TRANSFORM_H
#define DRIZZLED_MESSAGE_STATEMENT_TRANSFORM_H
#include <drizzled/message/table.pb.h>
#include <string>
#include <vector>
namespace drizzled
{
namespace message
{
/* some forward declarations */
class Statement;
class InsertHeader;
class InsertData;
class InsertRecord;
class UpdateHeader;
class UpdateData;
class UpdateRecord;
class DeleteHeader;
class DeleteData;
class DeleteRecord;
class SetVariableStatement;
/** A Variation of SQL to be output during transformation */
enum TransformSqlVariant
{
ANSI,
MYSQL_4,
MYSQL_5,
DRIZZLE
};
/** Error codes which can happen during tranformations */
enum TransformSqlError
{
NONE= 0,
MISSING_HEADER= 1, /* A data segment without a header segment was found */
MISSING_DATA= 2 /* A header segment without a data segment was found */
};
/**
* This function looks at the Statement
* message and appends one or more correctly-formatted SQL
* strings to the supplied vector of strings.
*
* @param Statement message to transform
* @param Vector of strings to append SQL statements to
* @param Variation of SQL to generate
*
* @retval
* NONE if successful transformation
* @retval
* Error code (see enum TransformSqlError definition) if failure
*/
enum TransformSqlError
transformStatementToSql(const Statement &source,
std::vector<std::string> &sql_strings,
enum TransformSqlVariant sql_variant= DRIZZLE);
/**
* This function looks at a supplied InsertHeader
* and InsertData message and constructs a correctly-formatted SQL
* statement to the supplied destination string.
*
* @note
*
* This function is used when you want to construct a <strong>
* single SQL statement</strong> from an entire InsertHeader and
* InsertData message. If there are many records in the InsertData
* message, the SQL statement will be a multi-value INSERT statement.
*
* @param InsertHeader message to transform
* @param InsertData message to transform
* @param Destination string to append SQL to
* @param Variation of SQL to generate
*
* @retval
* NONE if successful transformation
* @retval
* Error code (see enum TransformSqlError definition) if failure
*/
enum TransformSqlError
transformInsertStatementToSql(const InsertHeader &header,
const InsertData &data,
std::string *destination,
enum TransformSqlVariant sql_variant= DRIZZLE);
/**
* This function looks at a supplied InsertHeader
* and a single InsertRecord message and constructs a correctly-formatted
* SQL statement to the supplied destination string.
*
* @param InsertHeader message to transform
* @param InsertRecord message to transform
* @param Destination string to append SQL to
* @param Variation of SQL to generate
*
* @retval
* NONE if successful transformation
* @retval
* Error code (see enum TransformSqlError definition) if failure
*/
enum TransformSqlError
transformInsertRecordToSql(const InsertHeader &header,
const InsertRecord &record,
std::string *destination,
enum TransformSqlVariant sql_variant= DRIZZLE);
/**
* Helper function to construct the header portion of an INSERT
* SQL statement from an InsertHeader message.
*
* @param InsertHeader message to transform
* @param Destination string to append SQL to
* @param Variation of SQL to generate
*
* @retval
* NONE if successful transformation
* @retval
* Error code (see enum TransformSqlError definition) if failure
*/
enum TransformSqlError
transformInsertHeaderToSql(const InsertHeader &header,
std::string *destination,
enum TransformSqlVariant sql_variant= DRIZZLE);
/**
* Helper function to construct the header portion of an UPDATE
* SQL statement from an UpdateHeader message.
*
* @param UpdateHeader message to transform
* @param Destination string to append SQL to
* @param Variation of SQL to generate
*
* @retval
* NONE if successful transformation
* @retval
* Error code (see enum TransformSqlError definition) if failure
*/
enum TransformSqlError
transformUpdateHeaderToSql(const UpdateHeader &header,
std::string *destination,
enum TransformSqlVariant sql_variant= DRIZZLE);
/**
* This function looks at a supplied UpdateHeader
* and a single UpdateRecord message and constructs a correctly-formatted
* SQL statement to the supplied destination string.
*
* @param UpdateHeader message to transform
* @param UpdateRecord message to transform
* @param Destination string to append SQL to
* @param Variation of SQL to generate
*
* @retval
* NONE if successful transformation
* @retval
* Error code (see enum TransformSqlError definition) if failure
*/
enum TransformSqlError
transformUpdateRecordToSql(const UpdateHeader &header,
const UpdateRecord &record,
std::string *destination,
enum TransformSqlVariant sql_variant= DRIZZLE);
/**
* This function looks at a supplied DeleteHeader
* and DeleteData message and constructs a correctly-formatted SQL
* statement to the supplied destination string.
*
* @note
*
* This function constructs a <strong>single SQL statement</strong>
* for all keys in the DeleteData message.
*
* @param DeleteHeader message to transform
* @param DeleteData message to transform
* @param Destination string to append SQL to
* @param Variation of SQL to generate
*
* @retval
* NONE if successful transformation
* @retval
* Error code (see enum TransformSqlError definition) if failure
*/
enum TransformSqlError
transformDeleteStatementToSql(const DeleteHeader &header,
const DeleteData &data,
std::string *destination,
enum TransformSqlVariant sql_variant= DRIZZLE);
/**
* This function looks at a supplied DeleteHeader
* and a single DeleteRecord message and constructs a correctly-formatted
* SQL statement to the supplied destination string.
*
* @param DeleteHeader message to transform
* @param DeleteRecord message to transform
* @param Destination string to append SQL to
* @param Variation of SQL to generate
*
* @retval
* NONE if successful transformation
* @retval
* Error code (see enum TransformSqlError definition) if failure
*/
enum TransformSqlError
transformDeleteRecordToSql(const DeleteHeader &header,
const DeleteRecord &record,
std::string *destination,
enum TransformSqlVariant sql_variant= DRIZZLE);
/**
* Helper function to construct the header portion of a DELETE
* SQL statement from an DeleteHeader message.
*
* @param DeleteHeader message to transform
* @param Destination string to append SQL to
* @param Variation of SQL to generate
*
* @retval
* NONE if successful transformation
* @retval
* Error code (see enum TransformSqlError definition) if failure
*/
enum TransformSqlError
transformDeleteHeaderToSql(const DeleteHeader &header,
std::string *destination,
enum TransformSqlVariant sql_variant= DRIZZLE);
/**
* This function looks at a supplied SetVariableStatement
* and constructs a correctly-formatted SQL
* statement to the supplied destination string.
*
* @param SetVariableStatement message to transform
* @param Destination string to append SQL to
* @param Variation of SQL to generate
*
* @retval
* NONE if successful transformation
* @retval
* Error code (see enum TransformSqlError definition) if failure
*/
enum TransformSqlError
transformSetVariableStatementToSql(const SetVariableStatement &statement,
std::string *destination,
enum TransformSqlVariant sql_variant= DRIZZLE);
/**
* Returns true if the supplied message::Table::Field::FieldType
* should have its values quoted when modifying values.
*
* @param[in] type of field
*/
bool shouldQuoteFieldValue(Table::Field::FieldType in_type);
} /* end namespace drizzled::message */
} /* end namespace drizzled */
#endif /* DRIZZLED_MESSAGE_STATEMENT_TRANSFORM_H */
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