Query/drivers/firebird/firebird_sql.php

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<?php
/**
* Query
*
* Free Query Builder / Database Abstraction Layer
*
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* @package Query
* @author Timothy J. Warren
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* @copyright Copyright (c) 2012 - 2014
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* @link https://github.com/aviat4ion/Query
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* @license http://philsturgeon.co.uk/code/dbad-license
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*/
// --------------------------------------------------------------------------
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namespace Query\Driver;
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/**
* Firebird Specific SQL
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*
* @package Query
* @subpackage Drivers
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*/
class Firebird_SQL extends Abstract_SQL {
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/**
* Limit clause
*
* @param string $sql
* @param int $limit
* @param int $offset
* @return string
*/
public function limit($sql, $limit, $offset=FALSE)
{
// Keep the current sql string safe for a moment
$orig_sql = $sql;
$sql = 'FIRST '. (int) $limit;
if ($offset > 0)
{
$sql .= ' SKIP '. (int) $offset;
}
$sql = preg_replace("`SELECT`i", "SELECT {$sql}", $orig_sql);
return $sql;
}
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// --------------------------------------------------------------------------
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/**
* Get the query plan for the sql query
*
* @param string $sql
* @return string
*/
public function explain($sql)
{
return $sql;
}
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// --------------------------------------------------------------------------
/**
* Random ordering keyword
*
* @return string
*/
public function random()
{
return NULL;
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}
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// --------------------------------------------------------------------------
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/**
* Returns sql to list other databases
*
* @return NULL
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*/
public function db_list()
{
return NULL;
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}
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// --------------------------------------------------------------------------
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/**
* Returns sql to list tables
*
* @return string
*/
public function table_list()
{
return <<<SQL
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SELECT TRIM("RDB\$RELATION_NAME")
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FROM "RDB\$RELATIONS"
WHERE "RDB\$SYSTEM_FLAG"=0
AND "RDB\$VIEW_BLR" IS NULL
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ORDER BY "RDB\$RELATION_NAME" ASC
SQL;
}
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// --------------------------------------------------------------------------
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/**
* Returns sql to list system tables
*
* @return string
*/
public function system_table_list()
{
return <<<SQL
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SELECT TRIM("RDB\$RELATION_NAME")
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FROM "RDB\$RELATIONS"
WHERE "RDB\$SYSTEM_FLAG"=1
ORDER BY "RDB\$RELATION_NAME" ASC
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SQL;
}
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// --------------------------------------------------------------------------
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/**
* Returns sql to list views
*
* @return string
*/
public function view_list()
{
return <<<SQL
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SELECT DISTINCT "RDB\$VIEW_NAME"
FROM "RDB\$VIEW_RELATIONS"
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SQL;
}
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// --------------------------------------------------------------------------
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/**
* Returns sql to list triggers
*
* @return string
*/
public function trigger_list()
{
return <<<SQL
SELECT * FROM "RDB\$FUNCTIONS"
WHERE "RDB\$SYSTEM_FLAG" = 0
SQL;
}
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// --------------------------------------------------------------------------
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/**
* Return sql to list functions
*
* @return string
*/
public function function_list()
{
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return 'SELECT * FROM "RDB$FUNCTIONS"';
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}
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// --------------------------------------------------------------------------
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/**
* Return sql to list stored procedures
*
* @return string
*/
public function procedure_list()
{
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return <<<SQL
SELECT "RDB\$PROCEDURE_NAME",
"RDB\$PROCEDURE_ID",
"RDB\$PROCEDURE_INPUTS",
"RDB\$PROCEDURE_OUTPUTS",
"RDB\$DESCRIPTION",
"RDB\$PROCEDURE_SOURCE",
"RDB\$SECURITY_CLASS",
"RDB\$OWNER_NAME",
"RDB\$RUNTIME",
"RDB\$SYSTEM_FLAG",
"RDB\$PROCEDURE_TYPE",
"RDB\$VALID_BLR"
FROM "RDB\$PROCEDURES"
ORDER BY "RDB\$PROCEDURE_NAME" ASC
SQL;
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}
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// --------------------------------------------------------------------------
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/**
* Return sql to list sequences
*
* @return string
*/
public function sequence_list()
{
return <<<SQL
SELECT "RDB\$GENERATOR_NAME"
FROM "RDB\$GENERATORS"
WHERE "RDB\$SYSTEM_FLAG" = 0
SQL;
}
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// --------------------------------------------------------------------------
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/**
* Return sql to list columns of the specified table
*
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* @param string $table
* @return string
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*/
public function column_list($table)
{
return <<<SQL
SELECT r.RDB\$FIELD_NAME AS field_name,
r.RDB\$DESCRIPTION AS field_description,
r.RDB\$DEFAULT_VALUE AS field_default_value,
r.RDB\$NULL_FLAG AS field_not_null_constraint,
f.RDB\$FIELD_LENGTH AS field_length,
f.RDB\$FIELD_PRECISION AS field_precision,
f.RDB\$FIELD_SCALE AS field_scale,
CASE f.RDB\$FIELD_TYPE
WHEN 261 THEN 'BLOB'
WHEN 14 THEN 'CHAR'
WHEN 40 THEN 'CSTRING'
WHEN 11 THEN 'D_FLOAT'
WHEN 27 THEN 'DOUBLE'
WHEN 10 THEN 'FLOAT'
WHEN 16 THEN 'INT64'
WHEN 8 THEN 'INTEGER'
WHEN 9 THEN 'QUAD'
WHEN 7 THEN 'SMALLINT'
WHEN 12 THEN 'DATE'
WHEN 13 THEN 'TIME'
WHEN 35 THEN 'TIMESTAMP'
WHEN 37 THEN 'VARCHAR'
ELSE 'UNKNOWN'
END AS field_type,
f.RDB\$FIELD_SUB_TYPE AS field_subtype,
coll.RDB\$COLLATION_NAME AS field_collation,
cset.RDB\$CHARACTER_SET_NAME AS field_charset
FROM RDB\$RELATION_FIELDS r
LEFT JOIN RDB\$FIELDS f ON r.RDB\$FIELD_SOURCE = f.RDB\$FIELD_NAME
LEFT JOIN RDB\$COLLATIONS coll ON f.RDB\$COLLATION_ID = coll.RDB\$COLLATION_ID
LEFT JOIN RDB\$CHARACTER_SETS cset ON f.RDB\$CHARACTER_SET_ID = cset.RDB\$CHARACTER_SET_ID
WHERE r.RDB\$RELATION_NAME='{$table}'
ORDER BY r.RDB\$FIELD_POSITION
SQL;
}
// --------------------------------------------------------------------------
/**
* SQL to show list of field types
*
* @return string
*/
public function type_list()
{
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return <<<SQL
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SELECT "RDB\$TYPE_NAME", "RDB\$FIELD_NAME" FROM "RDB\$TYPES"
WHERE "RDB\$FIELD_NAME" IN ('RDB\$FIELD_TYPE', 'RDB\$FIELD_SUB_TYPE')
ORDER BY "RDB\$FIELD_NAME" DESC, "RDB\$TYPE_NAME" ASC
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SQL;
}
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// --------------------------------------------------------------------------
/**
* Get the list of foreign keys for the current
* table
*
* @param string $table
* @return string
*/
public function fk_list($table)
{
return <<<SQL
SELECT DISTINCT
TRIM(d1.RDB\$FIELD_NAME) AS "child_column",
TRIM(d2.RDB\$DEPENDED_ON_NAME) AS "parent_table",
TRIM(d2.RDB\$FIELD_NAME) AS "parent_column"
FROM RDB\$RELATION_CONSTRAINTS AS rc
LEFT JOIN RDB\$REF_CONSTRAINTS refc ON rc.RDB\$CONSTRAINT_NAME = refc.RDB\$CONSTRAINT_NAME
LEFT JOIN RDB\$DEPENDENCIES d1 ON d1.RDB\$DEPENDED_ON_NAME = rc.RDB\$RELATION_NAME
LEFT JOIN RDB\$DEPENDENCIES d2 ON d1.RDB\$DEPENDENT_NAME = d2.RDB\$DEPENDENT_NAME
WHERE rc.RDB\$CONSTRAINT_TYPE = 'FOREIGN KEY'
AND d1.RDB\$DEPENDED_ON_NAME <> d2.RDB\$DEPENDED_ON_NAME
AND d1.RDB\$FIELD_NAME <> d2.RDB\$FIELD_NAME
AND rc.RDB\$RELATION_NAME = '{$table}' -- table name
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SQL;
}
// --------------------------------------------------------------------------
/**
* Get the list of indexes for the current table
*
* @param string $table
* @return array
*/
public function index_list($table)
{
return <<<SQL
SELECT "RDB\$INDEX_NAME", "RDB\$UNIQUE_FLAG", "RDB\$FOREIGN_KEY"
FROM "RDB\$INDICES"
WHERE "RDB\$RELATION_NAME"='{$table}'
SQL;
}
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}
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//End of firebird_sql.php