[2] | 1 | <?php |
---|
| 2 | |
---|
| 3 | /** |
---|
[34] | 4 | V4.94 23 Jan 2007 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved. |
---|
[2] | 5 | Released under both BSD license and Lesser GPL library license. |
---|
| 6 | Whenever there is any discrepancy between the two licenses, |
---|
| 7 | the BSD license will take precedence. |
---|
| 8 | |
---|
| 9 | Set tabs to 4 for best viewing. |
---|
| 10 | |
---|
| 11 | */ |
---|
| 12 | |
---|
| 13 | // security - hide paths |
---|
| 14 | if (!defined('ADODB_DIR')) die(); |
---|
| 15 | |
---|
| 16 | class ADODB2_postgres extends ADODB_DataDict { |
---|
| 17 | |
---|
| 18 | var $databaseType = 'postgres'; |
---|
| 19 | var $seqField = false; |
---|
| 20 | var $seqPrefix = 'SEQ_'; |
---|
| 21 | var $addCol = ' ADD COLUMN'; |
---|
| 22 | var $quote = '"'; |
---|
[34] | 23 | var $renameTable = 'ALTER TABLE %s RENAME TO %s'; // at least since 7.1 |
---|
| 24 | var $dropTable = 'DROP TABLE %s CASCADE'; |
---|
[2] | 25 | |
---|
| 26 | function MetaType($t,$len=-1,$fieldobj=false) |
---|
| 27 | { |
---|
| 28 | if (is_object($t)) { |
---|
| 29 | $fieldobj = $t; |
---|
| 30 | $t = $fieldobj->type; |
---|
| 31 | $len = $fieldobj->max_length; |
---|
| 32 | } |
---|
[34] | 33 | $is_serial = is_object($fieldobj) && $fieldobj->primary_key && $fieldobj->unique && |
---|
| 34 | $fieldobj->has_default && substr($fieldobj->default_value,0,8) == 'nextval('; |
---|
| 35 | |
---|
[2] | 36 | switch (strtoupper($t)) { |
---|
| 37 | case 'INTERVAL': |
---|
| 38 | case 'CHAR': |
---|
| 39 | case 'CHARACTER': |
---|
| 40 | case 'VARCHAR': |
---|
| 41 | case 'NAME': |
---|
| 42 | case 'BPCHAR': |
---|
| 43 | if ($len <= $this->blobSize) return 'C'; |
---|
| 44 | |
---|
| 45 | case 'TEXT': |
---|
| 46 | return 'X'; |
---|
| 47 | |
---|
| 48 | case 'IMAGE': // user defined type |
---|
| 49 | case 'BLOB': // user defined type |
---|
| 50 | case 'BIT': // This is a bit string, not a single bit, so don't return 'L' |
---|
| 51 | case 'VARBIT': |
---|
| 52 | case 'BYTEA': |
---|
| 53 | return 'B'; |
---|
| 54 | |
---|
| 55 | case 'BOOL': |
---|
| 56 | case 'BOOLEAN': |
---|
| 57 | return 'L'; |
---|
| 58 | |
---|
| 59 | case 'DATE': |
---|
| 60 | return 'D'; |
---|
| 61 | |
---|
| 62 | case 'TIME': |
---|
| 63 | case 'DATETIME': |
---|
| 64 | case 'TIMESTAMP': |
---|
| 65 | case 'TIMESTAMPTZ': |
---|
| 66 | return 'T'; |
---|
| 67 | |
---|
[34] | 68 | case 'INTEGER': return !$is_serial ? 'I' : 'R'; |
---|
[2] | 69 | case 'SMALLINT': |
---|
[34] | 70 | case 'INT2': return !$is_serial ? 'I2' : 'R'; |
---|
| 71 | case 'INT4': return !$is_serial ? 'I4' : 'R'; |
---|
[2] | 72 | case 'BIGINT': |
---|
[34] | 73 | case 'INT8': return !$is_serial ? 'I8' : 'R'; |
---|
[2] | 74 | |
---|
| 75 | case 'OID': |
---|
| 76 | case 'SERIAL': |
---|
| 77 | return 'R'; |
---|
| 78 | |
---|
| 79 | case 'FLOAT4': |
---|
| 80 | case 'FLOAT8': |
---|
| 81 | case 'DOUBLE PRECISION': |
---|
| 82 | case 'REAL': |
---|
| 83 | return 'F'; |
---|
| 84 | |
---|
| 85 | default: |
---|
| 86 | return 'N'; |
---|
| 87 | } |
---|
| 88 | } |
---|
| 89 | |
---|
| 90 | function ActualType($meta) |
---|
| 91 | { |
---|
| 92 | switch($meta) { |
---|
| 93 | case 'C': return 'VARCHAR'; |
---|
| 94 | case 'XL': |
---|
| 95 | case 'X': return 'TEXT'; |
---|
| 96 | |
---|
| 97 | case 'C2': return 'VARCHAR'; |
---|
| 98 | case 'X2': return 'TEXT'; |
---|
| 99 | |
---|
| 100 | case 'B': return 'BYTEA'; |
---|
| 101 | |
---|
| 102 | case 'D': return 'DATE'; |
---|
| 103 | case 'T': return 'TIMESTAMP'; |
---|
| 104 | |
---|
[34] | 105 | case 'L': return 'BOOLEAN'; |
---|
[2] | 106 | case 'I': return 'INTEGER'; |
---|
| 107 | case 'I1': return 'SMALLINT'; |
---|
| 108 | case 'I2': return 'INT2'; |
---|
| 109 | case 'I4': return 'INT4'; |
---|
| 110 | case 'I8': return 'INT8'; |
---|
| 111 | |
---|
| 112 | case 'F': return 'FLOAT8'; |
---|
| 113 | case 'N': return 'NUMERIC'; |
---|
| 114 | default: |
---|
| 115 | return $meta; |
---|
| 116 | } |
---|
| 117 | } |
---|
| 118 | |
---|
[34] | 119 | /** |
---|
| 120 | * Adding a new Column |
---|
| 121 | * |
---|
| 122 | * reimplementation of the default function as postgres does NOT allow to set the default in the same statement |
---|
| 123 | * |
---|
| 124 | * @param string $tabname table-name |
---|
| 125 | * @param string $flds column-names and types for the changed columns |
---|
| 126 | * @return array with SQL strings |
---|
| 127 | */ |
---|
| 128 | function AddColumnSQL($tabname, $flds) |
---|
| 129 | { |
---|
| 130 | $tabname = $this->TableName ($tabname); |
---|
| 131 | $sql = array(); |
---|
| 132 | list($lines,$pkey) = $this->_GenFields($flds); |
---|
| 133 | $alter = 'ALTER TABLE ' . $tabname . $this->addCol . ' '; |
---|
| 134 | foreach($lines as $v) { |
---|
| 135 | if (($not_null = preg_match('/NOT NULL/i',$v))) { |
---|
| 136 | $v = preg_replace('/NOT NULL/i','',$v); |
---|
| 137 | } |
---|
| 138 | if (preg_match('/^([^ ]+) .*DEFAULT ([^ ]+)/',$v,$matches)) { |
---|
| 139 | list(,$colname,$default) = $matches; |
---|
| 140 | $sql[] = $alter . str_replace('DEFAULT '.$default,'',$v); |
---|
| 141 | $sql[] = 'UPDATE '.$tabname.' SET '.$colname.'='.$default; |
---|
| 142 | $sql[] = 'ALTER TABLE '.$tabname.' ALTER COLUMN '.$colname.' SET DEFAULT ' . $default; |
---|
| 143 | } else { |
---|
| 144 | $sql[] = $alter . $v; |
---|
| 145 | } |
---|
| 146 | if ($not_null) { |
---|
| 147 | list($colname) = explode(' ',$v); |
---|
| 148 | $sql[] = 'ALTER TABLE '.$tabname.' ALTER COLUMN '.$colname.' SET NOT NULL'; |
---|
| 149 | } |
---|
| 150 | } |
---|
| 151 | return $sql; |
---|
| 152 | } |
---|
[2] | 153 | |
---|
[34] | 154 | /** |
---|
| 155 | * Change the definition of one column |
---|
| 156 | * |
---|
| 157 | * Postgres can't do that on it's own, you need to supply the complete defintion of the new table, |
---|
| 158 | * to allow, recreating the table and copying the content over to the new table |
---|
| 159 | * @param string $tabname table-name |
---|
| 160 | * @param string $flds column-name and type for the changed column |
---|
| 161 | * @param string $tableflds complete defintion of the new table, eg. for postgres, default '' |
---|
| 162 | * @param array/ $tableoptions options for the new table see CreateTableSQL, default '' |
---|
| 163 | * @return array with SQL strings |
---|
| 164 | */ |
---|
| 165 | function AlterColumnSQL($tabname, $flds, $tableflds='',$tableoptions='') |
---|
[2] | 166 | { |
---|
[34] | 167 | if (!$tableflds) { |
---|
| 168 | if ($this->debug) ADOConnection::outp("AlterColumnSQL needs a complete table-definiton for PostgreSQL"); |
---|
| 169 | return array(); |
---|
| 170 | } |
---|
| 171 | return $this->_recreate_copy_table($tabname,False,$tableflds,$tableoptions); |
---|
| 172 | } |
---|
| 173 | |
---|
| 174 | /** |
---|
| 175 | * Drop one column |
---|
| 176 | * |
---|
| 177 | * Postgres < 7.3 can't do that on it's own, you need to supply the complete defintion of the new table, |
---|
| 178 | * to allow, recreating the table and copying the content over to the new table |
---|
| 179 | * @param string $tabname table-name |
---|
| 180 | * @param string $flds column-name and type for the changed column |
---|
| 181 | * @param string $tableflds complete defintion of the new table, eg. for postgres, default '' |
---|
| 182 | * @param array/ $tableoptions options for the new table see CreateTableSQL, default '' |
---|
| 183 | * @return array with SQL strings |
---|
| 184 | */ |
---|
| 185 | function DropColumnSQL($tabname, $flds, $tableflds='',$tableoptions='') |
---|
| 186 | { |
---|
| 187 | $has_drop_column = 7.3 <= (float) @$this->serverInfo['version']; |
---|
| 188 | if (!$has_drop_column && !$tableflds) { |
---|
| 189 | if ($this->debug) ADOConnection::outp("DropColumnSQL needs complete table-definiton for PostgreSQL < 7.3"); |
---|
[2] | 190 | return array(); |
---|
| 191 | } |
---|
[34] | 192 | if ($has_drop_column) { |
---|
| 193 | return ADODB_DataDict::DropColumnSQL($tabname, $flds); |
---|
| 194 | } |
---|
| 195 | return $this->_recreate_copy_table($tabname,$flds,$tableflds,$tableoptions); |
---|
| 196 | } |
---|
[2] | 197 | |
---|
[34] | 198 | /** |
---|
| 199 | * Save the content into a temp. table, drop and recreate the original table and copy the content back in |
---|
| 200 | * |
---|
| 201 | * We also take care to set the values of the sequenz and recreate the indexes. |
---|
| 202 | * All this is done in a transaction, to not loose the content of the table, if something went wrong! |
---|
| 203 | * @internal |
---|
| 204 | * @param string $tabname table-name |
---|
| 205 | * @param string $dropflds column-names to drop |
---|
| 206 | * @param string $tableflds complete defintion of the new table, eg. for postgres |
---|
| 207 | * @param array/string $tableoptions options for the new table see CreateTableSQL, default '' |
---|
| 208 | * @return array with SQL strings |
---|
| 209 | */ |
---|
| 210 | function _recreate_copy_table($tabname,$dropflds,$tableflds,$tableoptions='') |
---|
| 211 | { |
---|
| 212 | if ($dropflds && !is_array($dropflds)) $dropflds = explode(',',$dropflds); |
---|
| 213 | $copyflds = array(); |
---|
| 214 | foreach($this->MetaColumns($tabname) as $fld) { |
---|
| 215 | if (!$dropflds || !in_array($fld->name,$dropflds)) { |
---|
| 216 | // we need to explicit convert varchar to a number to be able to do an AlterColumn of a char column to a nummeric one |
---|
| 217 | if (preg_match('/'.$fld->name.' (I|I2|I4|I8|N|F)/i',$tableflds,$matches) && |
---|
| 218 | in_array($fld->type,array('varchar','char','text','bytea'))) { |
---|
| 219 | $copyflds[] = "to_number($fld->name,'S9999999999999D99')"; |
---|
| 220 | } else { |
---|
| 221 | $copyflds[] = $fld->name; |
---|
| 222 | } |
---|
| 223 | // identify the sequence name and the fld its on |
---|
| 224 | if ($fld->primary_key && $fld->has_default && |
---|
| 225 | preg_match("/nextval\('([^']+)'::text\)/",$fld->default_value,$matches)) { |
---|
| 226 | $seq_name = $matches[1]; |
---|
| 227 | $seq_fld = $fld->name; |
---|
| 228 | } |
---|
| 229 | } |
---|
| 230 | } |
---|
| 231 | $copyflds = implode(', ',$copyflds); |
---|
| 232 | |
---|
| 233 | $tempname = $tabname.'_tmp'; |
---|
| 234 | $aSql[] = 'BEGIN'; // we use a transaction, to make sure not to loose the content of the table |
---|
| 235 | $aSql[] = "SELECT * INTO TEMPORARY TABLE $tempname FROM $tabname"; |
---|
| 236 | $aSql = array_merge($aSql,$this->DropTableSQL($tabname)); |
---|
| 237 | $aSql = array_merge($aSql,$this->CreateTableSQL($tabname,$tableflds,$tableoptions)); |
---|
| 238 | $aSql[] = "INSERT INTO $tabname SELECT $copyflds FROM $tempname"; |
---|
| 239 | if ($seq_name && $seq_fld) { // if we have a sequence we need to set it again |
---|
| 240 | $seq_name = $tabname.'_'.$seq_fld.'_seq'; // has to be the name of the new implicit sequence |
---|
| 241 | $aSql[] = "SELECT setval('$seq_name',MAX($seq_fld)) FROM $tabname"; |
---|
| 242 | } |
---|
| 243 | $aSql[] = "DROP TABLE $tempname"; |
---|
| 244 | // recreate the indexes, if they not contain one of the droped columns |
---|
| 245 | foreach($this->MetaIndexes($tabname) as $idx_name => $idx_data) |
---|
| 246 | { |
---|
| 247 | if (substr($idx_name,-5) != '_pkey' && (!$dropflds || !count(array_intersect($dropflds,$idx_data['columns'])))) { |
---|
| 248 | $aSql = array_merge($aSql,$this->CreateIndexSQL($idx_name,$tabname,$idx_data['columns'], |
---|
| 249 | $idx_data['unique'] ? array('UNIQUE') : False)); |
---|
| 250 | } |
---|
| 251 | } |
---|
| 252 | $aSql[] = 'COMMIT'; |
---|
| 253 | return $aSql; |
---|
| 254 | } |
---|
[2] | 255 | |
---|
[34] | 256 | function DropTableSQL($tabname) |
---|
[2] | 257 | { |
---|
[34] | 258 | $sql = ADODB_DataDict::DropTableSQL($tabname); |
---|
| 259 | |
---|
| 260 | $drop_seq = $this->_DropAutoIncrement($tabname); |
---|
| 261 | if ($drop_seq) $sql[] = $drop_seq; |
---|
| 262 | |
---|
| 263 | return $sql; |
---|
[2] | 264 | } |
---|
| 265 | |
---|
| 266 | // return string must begin with space |
---|
| 267 | function _CreateSuffix($fname, &$ftype, $fnotnull,$fdefault,$fautoinc,$fconstraint) |
---|
| 268 | { |
---|
| 269 | if ($fautoinc) { |
---|
| 270 | $ftype = 'SERIAL'; |
---|
| 271 | return ''; |
---|
| 272 | } |
---|
| 273 | $suffix = ''; |
---|
| 274 | if (strlen($fdefault)) $suffix .= " DEFAULT $fdefault"; |
---|
| 275 | if ($fnotnull) $suffix .= ' NOT NULL'; |
---|
| 276 | if ($fconstraint) $suffix .= ' '.$fconstraint; |
---|
| 277 | return $suffix; |
---|
| 278 | } |
---|
| 279 | |
---|
[34] | 280 | // search for a sequece for the given table (asumes the seqence-name contains the table-name!) |
---|
| 281 | // if yes return sql to drop it |
---|
| 282 | // this is still necessary if postgres < 7.3 or the SERIAL was created on an earlier version!!! |
---|
| 283 | function _DropAutoIncrement($tabname) |
---|
[2] | 284 | { |
---|
[34] | 285 | $tabname = $this->connection->quote('%'.$tabname.'%'); |
---|
| 286 | |
---|
| 287 | $seq = $this->connection->GetOne("SELECT relname FROM pg_class WHERE NOT relname ~ 'pg_.*' AND relname LIKE $tabname AND relkind='S'"); |
---|
| 288 | |
---|
| 289 | // check if a tables depends on the sequenz and it therefor cant and dont need to be droped separatly |
---|
| 290 | if (!$seq || $this->connection->GetOne("SELECT relname FROM pg_class JOIN pg_depend ON pg_class.relfilenode=pg_depend.objid WHERE relname='$seq' AND relkind='S' AND deptype='i'")) { |
---|
| 291 | return False; |
---|
| 292 | } |
---|
| 293 | return "DROP SEQUENCE ".$seq; |
---|
[2] | 294 | } |
---|
| 295 | |
---|
| 296 | /* |
---|
| 297 | CREATE [ [ LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name ( |
---|
| 298 | { column_name data_type [ DEFAULT default_expr ] [ column_constraint [, ... ] ] |
---|
| 299 | | table_constraint } [, ... ] |
---|
| 300 | ) |
---|
| 301 | [ INHERITS ( parent_table [, ... ] ) ] |
---|
| 302 | [ WITH OIDS | WITHOUT OIDS ] |
---|
| 303 | where column_constraint is: |
---|
| 304 | [ CONSTRAINT constraint_name ] |
---|
| 305 | { NOT NULL | NULL | UNIQUE | PRIMARY KEY | |
---|
| 306 | CHECK (expression) | |
---|
| 307 | REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL ] |
---|
| 308 | [ ON DELETE action ] [ ON UPDATE action ] } |
---|
| 309 | [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] |
---|
| 310 | and table_constraint is: |
---|
| 311 | [ CONSTRAINT constraint_name ] |
---|
| 312 | { UNIQUE ( column_name [, ... ] ) | |
---|
| 313 | PRIMARY KEY ( column_name [, ... ] ) | |
---|
| 314 | CHECK ( expression ) | |
---|
| 315 | FOREIGN KEY ( column_name [, ... ] ) REFERENCES reftable [ ( refcolumn [, ... ] ) ] |
---|
| 316 | [ MATCH FULL | MATCH PARTIAL ] [ ON DELETE action ] [ ON UPDATE action ] } |
---|
| 317 | [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ] |
---|
| 318 | */ |
---|
| 319 | |
---|
| 320 | |
---|
| 321 | /* |
---|
| 322 | CREATE [ UNIQUE ] INDEX index_name ON table |
---|
| 323 | [ USING acc_method ] ( column [ ops_name ] [, ...] ) |
---|
| 324 | [ WHERE predicate ] |
---|
| 325 | CREATE [ UNIQUE ] INDEX index_name ON table |
---|
| 326 | [ USING acc_method ] ( func_name( column [, ... ]) [ ops_name ] ) |
---|
| 327 | [ WHERE predicate ] |
---|
| 328 | */ |
---|
| 329 | function _IndexSQL($idxname, $tabname, $flds, $idxoptions) |
---|
| 330 | { |
---|
| 331 | $sql = array(); |
---|
| 332 | |
---|
| 333 | if ( isset($idxoptions['REPLACE']) || isset($idxoptions['DROP']) ) { |
---|
| 334 | $sql[] = sprintf ($this->dropIndex, $idxname, $tabname); |
---|
| 335 | if ( isset($idxoptions['DROP']) ) |
---|
| 336 | return $sql; |
---|
| 337 | } |
---|
| 338 | |
---|
| 339 | if ( empty ($flds) ) { |
---|
| 340 | return $sql; |
---|
| 341 | } |
---|
| 342 | |
---|
| 343 | $unique = isset($idxoptions['UNIQUE']) ? ' UNIQUE' : ''; |
---|
| 344 | |
---|
| 345 | $s = 'CREATE' . $unique . ' INDEX ' . $idxname . ' ON ' . $tabname . ' '; |
---|
| 346 | |
---|
| 347 | if (isset($idxoptions['HASH'])) |
---|
| 348 | $s .= 'USING HASH '; |
---|
| 349 | |
---|
| 350 | if ( isset($idxoptions[$this->upperName]) ) |
---|
| 351 | $s .= $idxoptions[$this->upperName]; |
---|
| 352 | |
---|
| 353 | if ( is_array($flds) ) |
---|
| 354 | $flds = implode(', ',$flds); |
---|
| 355 | $s .= '(' . $flds . ')'; |
---|
| 356 | $sql[] = $s; |
---|
| 357 | |
---|
| 358 | return $sql; |
---|
| 359 | } |
---|
[34] | 360 | |
---|
| 361 | function _GetSize($ftype, $ty, $fsize, $fprec) |
---|
| 362 | { |
---|
| 363 | if (strlen($fsize) && $ty != 'X' && $ty != 'B' && $ty != 'I' && strpos($ftype,'(') === false) { |
---|
| 364 | $ftype .= "(".$fsize; |
---|
| 365 | if (strlen($fprec)) $ftype .= ",".$fprec; |
---|
| 366 | $ftype .= ')'; |
---|
| 367 | } |
---|
| 368 | return $ftype; |
---|
| 369 | } |
---|
[2] | 370 | } |
---|
| 371 | ?> |
---|