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