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doctrine2/lib/Doctrine/DatabasePlatform/FirebirdPlatform.php

271 lines
9.1 KiB
PHP

<?php
#namespace Doctrine::DBAL::Platforms;
/**
* Enter description here...
*
* @since 2.0
*/
class Doctrine_DatabasePlatform_FirebirdPlatform extends Doctrine_DatabasePlatform
{
/**
* Constructor.
*/
public function __construct()
{
parent::__construct();
$this->_supported = array(
'sequences' => true,
'indexes' => true,
'affected_rows' => true,
'summary_functions' => true,
'order_by_text' => true,
'transactions' => true,
'savepoints' => true,
'current_id' => true,
'limit_queries' => 'emulated',
'LOBs' => true,
'replace' => 'emulated',
'sub_selects' => true,
'auto_increment' => true,
'primary_key' => true,
'result_introspection' => true,
'prepared_statements' => true,
'identifier_quoting' => false,
'pattern_escaping' => true
);
}
/**
* Adds an driver-specific LIMIT clause to the query
*
* @param string $query query to modify
* @param integer $limit limit the number of rows
* @param integer $offset start reading from given offset
* @return string modified query
* @override
*/
public function writeLimitClause($query, $limit, $offset)
{
if ( ! $offset) {
$offset = 0;
}
if ($limit > 0) {
$query = preg_replace('/^([\s(])*SELECT(?!\s*FIRST\s*\d+)/i',
"SELECT FIRST $limit SKIP $offset", $query);
}
return $query;
}
/**
* return string for internal table used when calling only a function
*
* @return string for internal table used when calling only a function
*/
public function getFunctionTableExpression()
{
return ' FROM RDB$DATABASE';
}
/**
* build string to define escape pattern string
*
* @return string define escape pattern
* @override
*/
public function getPatternEscapeStringExpression()
{
return " ESCAPE '". $this->_properties['escape_pattern'] ."'";
}
/**
* Obtain DBMS specific SQL code portion needed to declare an text type
* field to be used in statements like CREATE TABLE.
*
* @param array $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
*
* length
* Integer value that determines the maximum length of the text
* field. If this argument is missing the field should be
* declared to have the longest length allowed by the DBMS.
*
* default
* Text value to be used as default for this field.
*
* notnull
* Boolean flag that indicates whether this field is constrained
* to not be set to null.
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
* @override
*/
public function getNativeDeclaration($field)
{
if ( ! isset($field['type'])) {
throw new Doctrine_DataDict_Exception('Missing column type.');
}
switch ($field['type']) {
case 'varchar':
case 'string':
case 'array':
case 'object':
case 'char':
case 'text':
case 'gzip':
$length = !empty($field['length'])
? $field['length'] : 16777215; // TODO: $this->conn->options['default_text_field_length'];
$fixed = ((isset($field['fixed']) && $field['fixed']) || $field['type'] == 'char') ? true : false;
return $fixed ? 'CHAR('.$length.')' : 'VARCHAR('.$length.')';
case 'clob':
return 'BLOB SUB_TYPE 1';
case 'blob':
return 'BLOB SUB_TYPE 0';
case 'integer':
case 'enum':
case 'int':
return 'INT';
case 'boolean':
return 'SMALLINT';
case 'date':
return 'DATE';
case 'time':
return 'TIME';
case 'timestamp':
return 'TIMESTAMP';
case 'float':
return 'DOUBLE PRECISION';
case 'decimal':
$length = !empty($field['length']) ? $field['length'] : 18;
$scale = !empty($field['scale']) ? $field['scale'] : $this->conn->getAttribute(Doctrine::ATTR_DECIMAL_PLACES);
return 'DECIMAL('.$length.','.$scale.')';
}
throw new Doctrine_DataDict_Exception('Unknown field type \'' . $field['type'] . '\'.');
}
/**
* Maps a native array description of a field to a Doctrine datatype and length
*
* @param array $field native field description
* @return array containing the various possible types, length, sign, fixed
* @override
*/
public function getPortableDeclaration($field)
{
$length = (isset($field['length']) && $field['length'] > 0) ? $field['length'] : null;
$type = array();
$unsigned = $fixed = null;
$dbType = strtolower($field['type']);
$field['field_sub_type'] = !empty($field['field_sub_type'])
? strtolower($field['field_sub_type']) : null;
if ( ! isset($field['name'])) {
$field['name'] = '';
}
switch ($dbType) {
case 'smallint':
case 'integer':
case 'int64':
//these may be 'numeric' or 'decimal'
if (isset($field['field_sub_type'])) {
$field['type'] = $field['field_sub_type'];
return $this->getPortableDeclaration($field);
}
case 'bigint':
case 'quad':
$type[] = 'integer';
if ($length == '1') {
$type[] = 'boolean';
if (preg_match('/^(is|has)/', $field['name'])) {
$type = array_reverse($type);
}
}
break;
case 'varchar':
$fixed = false;
case 'char':
case 'cstring':
$type[] = 'string';
if ($length == '1') {
$type[] = 'boolean';
if (preg_match('/^(is|has)/', $field['name'])) {
$type = array_reverse($type);
}
}
if ($fixed !== false) {
$fixed = true;
}
break;
case 'date':
$type[] = 'date';
$length = null;
break;
case 'timestamp':
$type[] = 'timestamp';
$length = null;
break;
case 'time':
$type[] = 'time';
$length = null;
break;
case 'float':
case 'double':
case 'double precision':
case 'd_float':
$type[] = 'float';
break;
case 'decimal':
case 'numeric':
$type[] = 'decimal';
break;
case 'blob':
$type[] = ($field['field_sub_type'] == 'text') ? 'clob' : 'blob';
$length = null;
break;
default:
throw new Doctrine_DataDict_Exception('unknown database attribute type: '.$dbType);
}
return array('type' => $type,
'length' => $length,
'unsigned' => $unsigned,
'fixed' => $fixed);
}
/**
* Obtain DBMS specific SQL code portion needed to set the CHARACTER SET
* of a field declaration to be used in statements like CREATE TABLE.
*
* @param string $charset name of the charset
* @return string DBMS specific SQL code portion needed to set the CHARACTER SET
* of a field declaration.
*/
public function getCharsetFieldDeclaration($charset)
{
return 'CHARACTER SET ' . $charset;
}
/**
* Obtain DBMS specific SQL code portion needed to set the COLLATION
* of a field declaration to be used in statements like CREATE TABLE.
*
* @param string $collation name of the collation
* @return string DBMS specific SQL code portion needed to set the COLLATION
* of a field declaration.
*/
public function getCollationFieldDeclaration($collation)
{
return 'COLLATE ' . $collation;
}
}
?>