[1] | 1 | <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
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| 2 | /** |
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| 3 | * CodeIgniter |
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| 4 | * |
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| 5 | * An open source application development framework for PHP 5.1.6 or newer |
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| 6 | * |
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| 7 | * @package CodeIgniter |
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| 8 | * @author ExpressionEngine Dev Team |
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| 9 | * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. |
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| 10 | * @license http://codeigniter.com/user_guide/license.html |
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| 11 | * @link http://codeigniter.com |
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| 12 | * @since Version 1.0 |
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| 13 | * @filesource |
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| 14 | */ |
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| 15 | |
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| 16 | // ------------------------------------------------------------------------ |
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| 17 | |
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| 18 | /** |
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| 19 | * Postgre Forge Class |
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| 20 | * |
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| 21 | * @category Database |
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| 22 | * @author ExpressionEngine Dev Team |
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| 23 | * @link http://codeigniter.com/user_guide/database/ |
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| 24 | */ |
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| 25 | class CI_DB_postgre_forge extends CI_DB_forge { |
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| 26 | |
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| 27 | /** |
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| 28 | * Create database |
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| 29 | * |
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| 30 | * @access private |
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| 31 | * @param string the database name |
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| 32 | * @return bool |
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| 33 | */ |
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| 34 | function _create_database($name) |
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| 35 | { |
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| 36 | return "CREATE DATABASE ".$name; |
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| 37 | } |
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| 38 | |
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| 39 | // -------------------------------------------------------------------- |
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| 40 | |
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| 41 | /** |
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| 42 | * Drop database |
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| 43 | * |
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| 44 | * @access private |
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| 45 | * @param string the database name |
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| 46 | * @return bool |
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| 47 | */ |
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| 48 | function _drop_database($name) |
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| 49 | { |
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| 50 | return "DROP DATABASE ".$name; |
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| 51 | } |
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| 52 | |
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| 53 | // -------------------------------------------------------------------- |
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| 54 | |
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| 55 | /** |
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| 56 | * Create Table |
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| 57 | * |
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| 58 | * @access private |
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| 59 | * @param string the table name |
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| 60 | * @param array the fields |
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| 61 | * @param mixed primary key(s) |
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| 62 | * @param mixed key(s) |
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| 63 | * @param boolean should 'IF NOT EXISTS' be added to the SQL |
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| 64 | * @return bool |
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| 65 | */ |
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| 66 | function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists) |
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| 67 | { |
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| 68 | $sql = 'CREATE TABLE '; |
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| 69 | |
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| 70 | if ($if_not_exists === TRUE) |
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| 71 | { |
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| 72 | if ($this->db->table_exists($table)) |
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| 73 | { |
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| 74 | return "SELECT * FROM $table"; // Needs to return innocous but valid SQL statement |
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| 75 | } |
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| 76 | } |
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| 77 | |
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| 78 | $sql .= $this->db->_escape_identifiers($table)." ("; |
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| 79 | $current_field_count = 0; |
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| 80 | |
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| 81 | foreach ($fields as $field=>$attributes) |
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| 82 | { |
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| 83 | // Numeric field names aren't allowed in databases, so if the key is |
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| 84 | // numeric, we know it was assigned by PHP and the developer manually |
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| 85 | // entered the field information, so we'll simply add it to the list |
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| 86 | if (is_numeric($field)) |
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| 87 | { |
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| 88 | $sql .= "\n\t$attributes"; |
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| 89 | } |
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| 90 | else |
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| 91 | { |
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| 92 | $attributes = array_change_key_case($attributes, CASE_UPPER); |
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| 93 | |
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| 94 | $sql .= "\n\t".$this->db->_protect_identifiers($field); |
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| 95 | |
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| 96 | $is_unsigned = (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE); |
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| 97 | |
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| 98 | // Convert datatypes to be PostgreSQL-compatible |
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| 99 | switch (strtoupper($attributes['TYPE'])) |
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| 100 | { |
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| 101 | case 'TINYINT': |
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| 102 | $attributes['TYPE'] = 'SMALLINT'; |
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| 103 | break; |
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| 104 | case 'SMALLINT': |
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| 105 | $attributes['TYPE'] = ($is_unsigned) ? 'INTEGER' : 'SMALLINT'; |
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| 106 | break; |
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| 107 | case 'MEDIUMINT': |
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| 108 | $attributes['TYPE'] = 'INTEGER'; |
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| 109 | break; |
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| 110 | case 'INT': |
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| 111 | $attributes['TYPE'] = ($is_unsigned) ? 'BIGINT' : 'INTEGER'; |
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| 112 | break; |
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| 113 | case 'BIGINT': |
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| 114 | $attributes['TYPE'] = ($is_unsigned) ? 'NUMERIC' : 'BIGINT'; |
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| 115 | break; |
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| 116 | case 'DOUBLE': |
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| 117 | $attributes['TYPE'] = 'DOUBLE PRECISION'; |
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| 118 | break; |
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| 119 | case 'DATETIME': |
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| 120 | $attributes['TYPE'] = 'TIMESTAMP'; |
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| 121 | break; |
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| 122 | case 'LONGTEXT': |
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| 123 | $attributes['TYPE'] = 'TEXT'; |
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| 124 | break; |
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| 125 | case 'BLOB': |
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| 126 | $attributes['TYPE'] = 'BYTEA'; |
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| 127 | break; |
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| 128 | } |
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| 129 | |
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| 130 | // If this is an auto-incrementing primary key, use the serial data type instead |
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| 131 | if (in_array($field, $primary_keys) && array_key_exists('AUTO_INCREMENT', $attributes) |
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| 132 | && $attributes['AUTO_INCREMENT'] === TRUE) |
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| 133 | { |
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| 134 | $sql .= ' SERIAL'; |
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| 135 | } |
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| 136 | else |
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| 137 | { |
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| 138 | $sql .= ' '.$attributes['TYPE']; |
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| 139 | } |
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| 140 | |
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| 141 | // Modified to prevent constraints with integer data types |
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| 142 | if (array_key_exists('CONSTRAINT', $attributes) && strpos($attributes['TYPE'], 'INT') === false) |
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| 143 | { |
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| 144 | $sql .= '('.$attributes['CONSTRAINT'].')'; |
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| 145 | } |
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| 146 | |
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| 147 | if (array_key_exists('DEFAULT', $attributes)) |
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| 148 | { |
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| 149 | $sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\''; |
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| 150 | } |
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| 151 | |
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| 152 | if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE) |
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| 153 | { |
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| 154 | $sql .= ' NULL'; |
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| 155 | } |
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| 156 | else |
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| 157 | { |
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| 158 | $sql .= ' NOT NULL'; |
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| 159 | } |
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| 160 | |
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| 161 | // Added new attribute to create unqite fields. Also works with MySQL |
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| 162 | if (array_key_exists('UNIQUE', $attributes) && $attributes['UNIQUE'] === TRUE) |
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| 163 | { |
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| 164 | $sql .= ' UNIQUE'; |
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| 165 | } |
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| 166 | } |
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| 167 | |
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| 168 | // don't add a comma on the end of the last field |
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| 169 | if (++$current_field_count < count($fields)) |
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| 170 | { |
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| 171 | $sql .= ','; |
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| 172 | } |
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| 173 | } |
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| 174 | |
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| 175 | if (count($primary_keys) > 0) |
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| 176 | { |
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| 177 | // Something seems to break when passing an array to _protect_identifiers() |
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| 178 | foreach ($primary_keys as $index => $key) |
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| 179 | { |
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| 180 | $primary_keys[$index] = $this->db->_protect_identifiers($key); |
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| 181 | } |
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| 182 | |
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| 183 | $sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")"; |
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| 184 | } |
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| 185 | |
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| 186 | $sql .= "\n);"; |
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| 187 | |
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| 188 | if (is_array($keys) && count($keys) > 0) |
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| 189 | { |
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| 190 | foreach ($keys as $key) |
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| 191 | { |
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| 192 | if (is_array($key)) |
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| 193 | { |
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| 194 | $key = $this->db->_protect_identifiers($key); |
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| 195 | } |
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| 196 | else |
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| 197 | { |
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| 198 | $key = array($this->db->_protect_identifiers($key)); |
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| 199 | } |
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| 200 | |
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| 201 | foreach ($key as $field) |
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| 202 | { |
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| 203 | $sql .= "CREATE INDEX " . $table . "_" . str_replace(array('"', "'"), '', $field) . "_index ON $table ($field); "; |
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| 204 | } |
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| 205 | } |
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| 206 | } |
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| 207 | |
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| 208 | return $sql; |
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| 209 | } |
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| 210 | |
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| 211 | // -------------------------------------------------------------------- |
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| 212 | |
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| 213 | /** |
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| 214 | * Drop Table |
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| 215 | * |
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| 216 | * @access private |
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| 217 | * @return bool |
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| 218 | */ |
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| 219 | function _drop_table($table) |
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| 220 | { |
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| 221 | return "DROP TABLE IF EXISTS ".$this->db->_escape_identifiers($table)." CASCADE"; |
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| 222 | } |
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| 223 | |
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| 224 | // -------------------------------------------------------------------- |
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| 225 | |
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| 226 | /** |
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| 227 | * Alter table query |
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| 228 | * |
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| 229 | * Generates a platform-specific query so that a table can be altered |
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| 230 | * Called by add_column(), drop_column(), and column_alter(), |
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| 231 | * |
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| 232 | * @access private |
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| 233 | * @param string the ALTER type (ADD, DROP, CHANGE) |
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| 234 | * @param string the column name |
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| 235 | * @param string the table name |
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| 236 | * @param string the column definition |
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| 237 | * @param string the default value |
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| 238 | * @param boolean should 'NOT NULL' be added |
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| 239 | * @param string the field after which we should add the new field |
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| 240 | * @return object |
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| 241 | */ |
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| 242 | function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '') |
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| 243 | { |
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| 244 | $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ".$this->db->_protect_identifiers($column_name); |
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| 245 | |
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| 246 | // DROP has everything it needs now. |
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| 247 | if ($alter_type == 'DROP') |
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| 248 | { |
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| 249 | return $sql; |
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| 250 | } |
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| 251 | |
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| 252 | $sql .= " $column_definition"; |
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| 253 | |
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| 254 | if ($default_value != '') |
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| 255 | { |
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| 256 | $sql .= " DEFAULT \"$default_value\""; |
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| 257 | } |
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| 258 | |
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| 259 | if ($null === NULL) |
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| 260 | { |
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| 261 | $sql .= ' NULL'; |
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| 262 | } |
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| 263 | else |
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| 264 | { |
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| 265 | $sql .= ' NOT NULL'; |
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| 266 | } |
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| 267 | |
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| 268 | if ($after_field != '') |
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| 269 | { |
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| 270 | $sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field); |
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| 271 | } |
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| 272 | |
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| 273 | return $sql; |
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| 274 | |
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| 275 | } |
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| 276 | |
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| 277 | // -------------------------------------------------------------------- |
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| 278 | |
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| 279 | /** |
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| 280 | * Rename a table |
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| 281 | * |
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| 282 | * Generates a platform-specific query so that a table can be renamed |
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| 283 | * |
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| 284 | * @access private |
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| 285 | * @param string the old table name |
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| 286 | * @param string the new table name |
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| 287 | * @return string |
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| 288 | */ |
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| 289 | function _rename_table($table_name, $new_table_name) |
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| 290 | { |
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| 291 | $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name); |
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| 292 | return $sql; |
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| 293 | } |
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| 294 | |
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| 295 | |
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| 296 | } |
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| 297 | |
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| 298 | /* End of file postgre_forge.php */ |
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| 299 | /* Location: ./system/database/drivers/postgre/postgre_forge.php */ |
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