Ids.php
302 lines
| 1 | <?php |
| 2 | /** |
| 3 | * Zend Framework |
| 4 | * |
| 5 | * LICENSE |
| 6 | * |
| 7 | * This source file is subject to the new BSD license that is bundled |
| 8 | * with this package in the file LICENSE.txt. |
| 9 | * It is also available through the world-wide-web at this URL: |
| 10 | * http://framework.zend.com/license/new-bsd |
| 11 | * If you did not receive a copy of the license and are unable to |
| 12 | * obtain it through the world-wide-web, please send an email |
| 13 | * to license@zend.com so we can send you a copy immediately. |
| 14 | * |
| 15 | * @category Zend |
| 16 | * @package Zend_Db |
| 17 | * @subpackage Adapter |
| 18 | * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com) |
| 19 | * @license http://framework.zend.com/license/new-bsd New BSD License |
| 20 | * @version $Id: Ids.php 23775 2011-03-01 17:25:24Z ralph $ |
| 21 | */ |
| 22 | |
| 23 | |
| 24 | /** @see Zend_Db_Adapter_Pdo_Ibm */ |
| 25 | // require_once 'Zend/Db/Adapter/Pdo/Ibm.php'; |
| 26 | |
| 27 | /** @see Zend_Db_Statement_Pdo_Ibm */ |
| 28 | // require_once 'Zend/Db/Statement/Pdo/Ibm.php'; |
| 29 | |
| 30 | |
| 31 | /** |
| 32 | * @category Zend |
| 33 | * @package Zend_Db |
| 34 | * @subpackage Adapter |
| 35 | * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com) |
| 36 | * @license http://framework.zend.com/license/new-bsd New BSD License |
| 37 | */ |
| 38 | class Zend_Db_Adapter_Pdo_Ibm_Ids |
| 39 | { |
| 40 | /** |
| 41 | * @var Zend_Db_Adapter_Abstract |
| 42 | */ |
| 43 | protected $_adapter = null; |
| 44 | |
| 45 | /** |
| 46 | * Construct the data server class. |
| 47 | * |
| 48 | * It will be used to generate non-generic SQL |
| 49 | * for a particular data server |
| 50 | * |
| 51 | * @param Zend_Db_Adapter_Abstract $adapter |
| 52 | */ |
| 53 | public function __construct($adapter) |
| 54 | { |
| 55 | $this->_adapter = $adapter; |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * Returns a list of the tables in the database. |
| 60 | * |
| 61 | * @return array |
| 62 | */ |
| 63 | public function listTables() |
| 64 | { |
| 65 | $sql = "SELECT tabname " |
| 66 | . "FROM systables "; |
| 67 | |
| 68 | return $this->_adapter->fetchCol($sql); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * IDS catalog lookup for describe table |
| 73 | * |
| 74 | * @param string $tableName |
| 75 | * @param string $schemaName OPTIONAL |
| 76 | * @return array |
| 77 | */ |
| 78 | public function describeTable($tableName, $schemaName = null) |
| 79 | { |
| 80 | // this is still a work in progress |
| 81 | |
| 82 | $sql= "SELECT DISTINCT t.owner, t.tabname, c.colname, c.colno, c.coltype, |
| 83 | d.default, c.collength, t.tabid |
| 84 | FROM syscolumns c |
| 85 | JOIN systables t ON c.tabid = t.tabid |
| 86 | LEFT JOIN sysdefaults d ON c.tabid = d.tabid AND c.colno = d.colno |
| 87 | WHERE " |
| 88 | . $this->_adapter->quoteInto('UPPER(t.tabname) = UPPER(?)', $tableName); |
| 89 | if ($schemaName) { |
| 90 | $sql .= $this->_adapter->quoteInto(' AND UPPER(t.owner) = UPPER(?)', $schemaName); |
| 91 | } |
| 92 | $sql .= " ORDER BY c.colno"; |
| 93 | |
| 94 | $desc = array(); |
| 95 | $stmt = $this->_adapter->query($sql); |
| 96 | |
| 97 | $result = $stmt->fetchAll(Zend_Db::FETCH_NUM); |
| 98 | |
| 99 | /** |
| 100 | * The ordering of columns is defined by the query so we can map |
| 101 | * to variables to improve readability |
| 102 | */ |
| 103 | $tabschema = 0; |
| 104 | $tabname = 1; |
| 105 | $colname = 2; |
| 106 | $colno = 3; |
| 107 | $typename = 4; |
| 108 | $default = 5; |
| 109 | $length = 6; |
| 110 | $tabid = 7; |
| 111 | |
| 112 | $primaryCols = null; |
| 113 | |
| 114 | foreach ($result as $key => $row) { |
| 115 | $primary = false; |
| 116 | $primaryPosition = null; |
| 117 | |
| 118 | if (!$primaryCols) { |
| 119 | $primaryCols = $this->_getPrimaryInfo($row[$tabid]); |
| 120 | } |
| 121 | |
| 122 | if (array_key_exists($row[$colno], $primaryCols)) { |
| 123 | $primary = true; |
| 124 | $primaryPosition = $primaryCols[$row[$colno]]; |
| 125 | } |
| 126 | |
| 127 | $identity = false; |
| 128 | if ($row[$typename] == 6 + 256 || |
| 129 | $row[$typename] == 18 + 256) { |
| 130 | $identity = true; |
| 131 | } |
| 132 | |
| 133 | $desc[$this->_adapter->foldCase($row[$colname])] = array ( |
| 134 | 'SCHEMA_NAME' => $this->_adapter->foldCase($row[$tabschema]), |
| 135 | 'TABLE_NAME' => $this->_adapter->foldCase($row[$tabname]), |
| 136 | 'COLUMN_NAME' => $this->_adapter->foldCase($row[$colname]), |
| 137 | 'COLUMN_POSITION' => $row[$colno], |
| 138 | 'DATA_TYPE' => $this->_getDataType($row[$typename]), |
| 139 | 'DEFAULT' => $row[$default], |
| 140 | 'NULLABLE' => (bool) !($row[$typename] - 256 >= 0), |
| 141 | 'LENGTH' => $row[$length], |
| 142 | 'SCALE' => ($row[$typename] == 5 ? $row[$length]&255 : 0), |
| 143 | 'PRECISION' => ($row[$typename] == 5 ? (int)($row[$length]/256) : 0), |
| 144 | 'UNSIGNED' => false, |
| 145 | 'PRIMARY' => $primary, |
| 146 | 'PRIMARY_POSITION' => $primaryPosition, |
| 147 | 'IDENTITY' => $identity |
| 148 | ); |
| 149 | } |
| 150 | |
| 151 | return $desc; |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * Map number representation of a data type |
| 156 | * to a string |
| 157 | * |
| 158 | * @param int $typeNo |
| 159 | * @return string |
| 160 | */ |
| 161 | protected function _getDataType($typeNo) |
| 162 | { |
| 163 | $typemap = array( |
| 164 | 0 => "CHAR", |
| 165 | 1 => "SMALLINT", |
| 166 | 2 => "INTEGER", |
| 167 | 3 => "FLOAT", |
| 168 | 4 => "SMALLFLOAT", |
| 169 | 5 => "DECIMAL", |
| 170 | 6 => "SERIAL", |
| 171 | 7 => "DATE", |
| 172 | 8 => "MONEY", |
| 173 | 9 => "NULL", |
| 174 | 10 => "DATETIME", |
| 175 | 11 => "BYTE", |
| 176 | 12 => "TEXT", |
| 177 | 13 => "VARCHAR", |
| 178 | 14 => "INTERVAL", |
| 179 | 15 => "NCHAR", |
| 180 | 16 => "NVARCHAR", |
| 181 | 17 => "INT8", |
| 182 | 18 => "SERIAL8", |
| 183 | 19 => "SET", |
| 184 | 20 => "MULTISET", |
| 185 | 21 => "LIST", |
| 186 | 22 => "Unnamed ROW", |
| 187 | 40 => "Variable-length opaque type", |
| 188 | 4118 => "Named ROW" |
| 189 | ); |
| 190 | |
| 191 | if ($typeNo - 256 >= 0) { |
| 192 | $typeNo = $typeNo - 256; |
| 193 | } |
| 194 | |
| 195 | return $typemap[$typeNo]; |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * Helper method to retrieve primary key column |
| 200 | * and column location |
| 201 | * |
| 202 | * @param int $tabid |
| 203 | * @return array |
| 204 | */ |
| 205 | protected function _getPrimaryInfo($tabid) |
| 206 | { |
| 207 | $sql = "SELECT i.part1, i.part2, i.part3, i.part4, i.part5, i.part6, |
| 208 | i.part7, i.part8, i.part9, i.part10, i.part11, i.part12, |
| 209 | i.part13, i.part14, i.part15, i.part16 |
| 210 | FROM sysindexes i |
| 211 | JOIN sysconstraints c ON c.idxname = i.idxname |
| 212 | WHERE i.tabid = " . $tabid . " AND c.constrtype = 'P'"; |
| 213 | |
| 214 | $stmt = $this->_adapter->query($sql); |
| 215 | $results = $stmt->fetchAll(); |
| 216 | |
| 217 | $cols = array(); |
| 218 | |
| 219 | // this should return only 1 row |
| 220 | // unless there is no primary key, |
| 221 | // in which case, the empty array is returned |
| 222 | if ($results) { |
| 223 | $row = $results[0]; |
| 224 | } else { |
| 225 | return $cols; |
| 226 | } |
| 227 | |
| 228 | $position = 0; |
| 229 | foreach ($row as $key => $colno) { |
| 230 | $position++; |
| 231 | if ($colno == 0) { |
| 232 | return $cols; |
| 233 | } else { |
| 234 | $cols[$colno] = $position; |
| 235 | } |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * Adds an IDS-specific LIMIT clause to the SELECT statement. |
| 241 | * |
| 242 | * @param string $sql |
| 243 | * @param integer $count |
| 244 | * @param integer $offset OPTIONAL |
| 245 | * @throws Zend_Db_Adapter_Exception |
| 246 | * @return string |
| 247 | */ |
| 248 | public function limit($sql, $count, $offset = 0) |
| 249 | { |
| 250 | $count = intval($count); |
| 251 | if ($count < 0) { |
| 252 | /** @see Zend_Db_Adapter_Exception */ |
| 253 | // require_once 'Zend/Db/Adapter/Exception.php'; |
| 254 | throw new Zend_Db_Adapter_Exception("LIMIT argument count=$count is not valid"); |
| 255 | } else if ($count == 0) { |
| 256 | $limit_sql = str_ireplace("SELECT", "SELECT * FROM (SELECT", $sql); |
| 257 | $limit_sql .= ") WHERE 0 = 1"; |
| 258 | } else { |
| 259 | $offset = intval($offset); |
| 260 | if ($offset < 0) { |
| 261 | /** @see Zend_Db_Adapter_Exception */ |
| 262 | // require_once 'Zend/Db/Adapter/Exception.php'; |
| 263 | throw new Zend_Db_Adapter_Exception("LIMIT argument offset=$offset is not valid"); |
| 264 | } |
| 265 | if ($offset == 0) { |
| 266 | $limit_sql = str_ireplace("SELECT", "SELECT FIRST $count", $sql); |
| 267 | } else { |
| 268 | $limit_sql = str_ireplace("SELECT", "SELECT SKIP $offset LIMIT $count", $sql); |
| 269 | } |
| 270 | } |
| 271 | return $limit_sql; |
| 272 | } |
| 273 | |
| 274 | /** |
| 275 | * IDS-specific last sequence id |
| 276 | * |
| 277 | * @param string $sequenceName |
| 278 | * @return integer |
| 279 | */ |
| 280 | public function lastSequenceId($sequenceName) |
| 281 | { |
| 282 | $sql = 'SELECT '.$this->_adapter->quoteIdentifier($sequenceName).'.CURRVAL FROM ' |
| 283 | .'systables WHERE tabid = 1'; |
| 284 | $value = $this->_adapter->fetchOne($sql); |
| 285 | return $value; |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * IDS-specific sequence id value |
| 290 | * |
| 291 | * @param string $sequenceName |
| 292 | * @return integer |
| 293 | */ |
| 294 | public function nextSequenceId($sequenceName) |
| 295 | { |
| 296 | $sql = 'SELECT '.$this->_adapter->quoteIdentifier($sequenceName).'.NEXTVAL FROM ' |
| 297 | .'systables WHERE tabid = 1'; |
| 298 | $value = $this->_adapter->fetchOne($sql); |
| 299 | return $value; |
| 300 | } |
| 301 | } |
| 302 |