New file |
0,0 → 1,1135 |
<?php |
|
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ |
|
/** |
* The PEAR DB driver for PHP's pgsql extension |
* for interacting with PostgreSQL databases |
* |
* PHP versions 4 and 5 |
* |
* LICENSE: This source file is subject to version 3.0 of the PHP license |
* that is available through the world-wide-web at the following URI: |
* http://www.php.net/license/3_0.txt. If you did not receive a copy of |
* the PHP License and are unable to obtain it through the web, please |
* send a note to license@php.net so we can mail you a copy immediately. |
* |
* @category Database |
* @package DB |
* @author Rui Hirokawa <hirokawa@php.net> |
* @author Stig Bakken <ssb@php.net> |
* @author Daniel Convissor <danielc@php.net> |
* @copyright 1997-2007 The PHP Group |
* @license http://www.php.net/license/3_0.txt PHP License 3.0 |
* @version CVS: $Id: pgsql.php,v 1.1 2008/07/07 18:00:39 mrflos Exp $ |
* @link http://pear.php.net/package/DB |
*/ |
|
/** |
* Obtain the DB_common class so it can be extended from |
*/ |
require_once 'DB/common.php'; |
|
/** |
* The methods PEAR DB uses to interact with PHP's pgsql extension |
* for interacting with PostgreSQL databases |
* |
* These methods overload the ones declared in DB_common. |
* |
* @category Database |
* @package DB |
* @author Rui Hirokawa <hirokawa@php.net> |
* @author Stig Bakken <ssb@php.net> |
* @author Daniel Convissor <danielc@php.net> |
* @copyright 1997-2007 The PHP Group |
* @license http://www.php.net/license/3_0.txt PHP License 3.0 |
* @version Release: 1.7.14RC1 |
* @link http://pear.php.net/package/DB |
*/ |
class DB_pgsql extends DB_common |
{ |
// {{{ properties |
|
/** |
* The DB driver type (mysql, oci8, odbc, etc.) |
* @var string |
*/ |
var $phptype = 'pgsql'; |
|
/** |
* The database syntax variant to be used (db2, access, etc.), if any |
* @var string |
*/ |
var $dbsyntax = 'pgsql'; |
|
/** |
* The capabilities of this DB implementation |
* |
* The 'new_link' element contains the PHP version that first provided |
* new_link support for this DBMS. Contains false if it's unsupported. |
* |
* Meaning of the 'limit' element: |
* + 'emulate' = emulate with fetch row by number |
* + 'alter' = alter the query |
* + false = skip rows |
* |
* @var array |
*/ |
var $features = array( |
'limit' => 'alter', |
'new_link' => '4.3.0', |
'numrows' => true, |
'pconnect' => true, |
'prepare' => false, |
'ssl' => true, |
'transactions' => true, |
); |
|
/** |
* A mapping of native error codes to DB error codes |
* @var array |
*/ |
var $errorcode_map = array( |
); |
|
/** |
* The raw database connection created by PHP |
* @var resource |
*/ |
var $connection; |
|
/** |
* The DSN information for connecting to a database |
* @var array |
*/ |
var $dsn = array(); |
|
|
/** |
* Should data manipulation queries be committed automatically? |
* @var bool |
* @access private |
*/ |
var $autocommit = true; |
|
/** |
* The quantity of transactions begun |
* |
* {@internal While this is private, it can't actually be designated |
* private in PHP 5 because it is directly accessed in the test suite.}} |
* |
* @var integer |
* @access private |
*/ |
var $transaction_opcount = 0; |
|
/** |
* The number of rows affected by a data manipulation query |
* @var integer |
*/ |
var $affected = 0; |
|
/** |
* The current row being looked at in fetchInto() |
* @var array |
* @access private |
*/ |
var $row = array(); |
|
/** |
* The number of rows in a given result set |
* @var array |
* @access private |
*/ |
var $_num_rows = array(); |
|
|
// }}} |
// {{{ constructor |
|
/** |
* This constructor calls <kbd>$this->DB_common()</kbd> |
* |
* @return void |
*/ |
function DB_pgsql() |
{ |
$this->DB_common(); |
} |
|
// }}} |
// {{{ connect() |
|
/** |
* Connect to the database server, log in and open the database |
* |
* Don't call this method directly. Use DB::connect() instead. |
* |
* PEAR DB's pgsql driver supports the following extra DSN options: |
* + connect_timeout How many seconds to wait for a connection to |
* be established. Available since PEAR DB 1.7.0. |
* + new_link If set to true, causes subsequent calls to |
* connect() to return a new connection link |
* instead of the existing one. WARNING: this is |
* not portable to other DBMS's. Available only |
* if PHP is >= 4.3.0 and PEAR DB is >= 1.7.0. |
* + options Command line options to be sent to the server. |
* Available since PEAR DB 1.6.4. |
* + service Specifies a service name in pg_service.conf that |
* holds additional connection parameters. |
* Available since PEAR DB 1.7.0. |
* + sslmode How should SSL be used when connecting? Values: |
* disable, allow, prefer or require. |
* Available since PEAR DB 1.7.0. |
* + tty This was used to specify where to send server |
* debug output. Available since PEAR DB 1.6.4. |
* |
* Example of connecting to a new link via a socket: |
* <code> |
* require_once 'DB.php'; |
* |
* $dsn = 'pgsql://user:pass@unix(/tmp)/dbname?new_link=true'; |
* $options = array( |
* 'portability' => DB_PORTABILITY_ALL, |
* ); |
* |
* $db = DB::connect($dsn, $options); |
* if (PEAR::isError($db)) { |
* die($db->getMessage()); |
* } |
* </code> |
* |
* @param array $dsn the data source name |
* @param bool $persistent should the connection be persistent? |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
* |
* @link http://www.postgresql.org/docs/current/static/libpq.html#LIBPQ-CONNECT |
*/ |
function connect($dsn, $persistent = false) |
{ |
if (!PEAR::loadExtension('pgsql')) { |
return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND); |
} |
|
$this->dsn = $dsn; |
if ($dsn['dbsyntax']) { |
$this->dbsyntax = $dsn['dbsyntax']; |
} |
|
$protocol = $dsn['protocol'] ? $dsn['protocol'] : 'tcp'; |
|
$params = array(''); |
if ($protocol == 'tcp') { |
if ($dsn['hostspec']) { |
$params[0] .= 'host=' . $dsn['hostspec']; |
} |
if ($dsn['port']) { |
$params[0] .= ' port=' . $dsn['port']; |
} |
} elseif ($protocol == 'unix') { |
// Allow for pg socket in non-standard locations. |
if ($dsn['socket']) { |
$params[0] .= 'host=' . $dsn['socket']; |
} |
if ($dsn['port']) { |
$params[0] .= ' port=' . $dsn['port']; |
} |
} |
if ($dsn['database']) { |
$params[0] .= ' dbname=\'' . addslashes($dsn['database']) . '\''; |
} |
if ($dsn['username']) { |
$params[0] .= ' user=\'' . addslashes($dsn['username']) . '\''; |
} |
if ($dsn['password']) { |
$params[0] .= ' password=\'' . addslashes($dsn['password']) . '\''; |
} |
if (!empty($dsn['options'])) { |
$params[0] .= ' options=' . $dsn['options']; |
} |
if (!empty($dsn['tty'])) { |
$params[0] .= ' tty=' . $dsn['tty']; |
} |
if (!empty($dsn['connect_timeout'])) { |
$params[0] .= ' connect_timeout=' . $dsn['connect_timeout']; |
} |
if (!empty($dsn['sslmode'])) { |
$params[0] .= ' sslmode=' . $dsn['sslmode']; |
} |
if (!empty($dsn['service'])) { |
$params[0] .= ' service=' . $dsn['service']; |
} |
|
if (isset($dsn['new_link']) |
&& ($dsn['new_link'] == 'true' || $dsn['new_link'] === true)) |
{ |
if (version_compare(phpversion(), '4.3.0', '>=')) { |
$params[] = PGSQL_CONNECT_FORCE_NEW; |
} |
} |
|
$connect_function = $persistent ? 'pg_pconnect' : 'pg_connect'; |
|
$ini = ini_get('track_errors'); |
$php_errormsg = ''; |
if ($ini) { |
$this->connection = @call_user_func_array($connect_function, |
$params); |
} else { |
@ini_set('track_errors', 1); |
$this->connection = @call_user_func_array($connect_function, |
$params); |
@ini_set('track_errors', $ini); |
} |
|
if (!$this->connection) { |
return $this->raiseError(DB_ERROR_CONNECT_FAILED, |
null, null, null, |
$php_errormsg); |
} |
return DB_OK; |
} |
|
// }}} |
// {{{ disconnect() |
|
/** |
* Disconnects from the database server |
* |
* @return bool TRUE on success, FALSE on failure |
*/ |
function disconnect() |
{ |
$ret = @pg_close($this->connection); |
$this->connection = null; |
return $ret; |
} |
|
// }}} |
// {{{ simpleQuery() |
|
/** |
* Sends a query to the database server |
* |
* @param string the SQL query string |
* |
* @return mixed + a PHP result resrouce for successful SELECT queries |
* + the DB_OK constant for other successful queries |
* + a DB_Error object on failure |
*/ |
function simpleQuery($query) |
{ |
$ismanip = $this->_checkManip($query); |
$this->last_query = $query; |
$query = $this->modifyQuery($query); |
if (!$this->autocommit && $ismanip) { |
if ($this->transaction_opcount == 0) { |
$result = @pg_exec($this->connection, 'begin;'); |
if (!$result) { |
return $this->pgsqlRaiseError(); |
} |
} |
$this->transaction_opcount++; |
} |
$result = @pg_exec($this->connection, $query); |
if (!$result) { |
return $this->pgsqlRaiseError(); |
} |
|
/* |
* Determine whether queries produce affected rows, result or nothing. |
* |
* This logic was introduced in version 1.1 of the file by ssb, |
* though the regex has been modified slightly since then. |
* |
* PostgreSQL commands: |
* ABORT, ALTER, BEGIN, CLOSE, CLUSTER, COMMIT, COPY, |
* CREATE, DECLARE, DELETE, DROP TABLE, EXPLAIN, FETCH, |
* GRANT, INSERT, LISTEN, LOAD, LOCK, MOVE, NOTIFY, RESET, |
* REVOKE, ROLLBACK, SELECT, SELECT INTO, SET, SHOW, |
* UNLISTEN, UPDATE, VACUUM |
*/ |
if ($ismanip) { |
$this->affected = @pg_affected_rows($result); |
return DB_OK; |
} elseif (preg_match('/^\s*\(*\s*(SELECT|EXPLAIN|FETCH|SHOW)\s/si', |
$query)) |
{ |
$this->row[(int)$result] = 0; // reset the row counter. |
$numrows = $this->numRows($result); |
if (is_object($numrows)) { |
return $numrows; |
} |
$this->_num_rows[(int)$result] = $numrows; |
$this->affected = 0; |
return $result; |
} else { |
$this->affected = 0; |
return DB_OK; |
} |
} |
|
// }}} |
// {{{ nextResult() |
|
/** |
* Move the internal pgsql result pointer to the next available result |
* |
* @param a valid fbsql result resource |
* |
* @access public |
* |
* @return true if a result is available otherwise return false |
*/ |
function nextResult($result) |
{ |
return false; |
} |
|
// }}} |
// {{{ fetchInto() |
|
/** |
* Places a row from the result set into the given array |
* |
* Formating of the array and the data therein are configurable. |
* See DB_result::fetchInto() for more information. |
* |
* This method is not meant to be called directly. Use |
* DB_result::fetchInto() instead. It can't be declared "protected" |
* because DB_result is a separate object. |
* |
* @param resource $result the query result resource |
* @param array $arr the referenced array to put the data in |
* @param int $fetchmode how the resulting array should be indexed |
* @param int $rownum the row number to fetch (0 = first row) |
* |
* @return mixed DB_OK on success, NULL when the end of a result set is |
* reached or on failure |
* |
* @see DB_result::fetchInto() |
*/ |
function fetchInto($result, &$arr, $fetchmode, $rownum = null) |
{ |
$result_int = (int)$result; |
$rownum = ($rownum !== null) ? $rownum : $this->row[$result_int]; |
if ($rownum >= $this->_num_rows[$result_int]) { |
return null; |
} |
if ($fetchmode & DB_FETCHMODE_ASSOC) { |
$arr = @pg_fetch_array($result, $rownum, PGSQL_ASSOC); |
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE && $arr) { |
$arr = array_change_key_case($arr, CASE_LOWER); |
} |
} else { |
$arr = @pg_fetch_row($result, $rownum); |
} |
if (!$arr) { |
return null; |
} |
if ($this->options['portability'] & DB_PORTABILITY_RTRIM) { |
$this->_rtrimArrayValues($arr); |
} |
if ($this->options['portability'] & DB_PORTABILITY_NULL_TO_EMPTY) { |
$this->_convertNullArrayValuesToEmpty($arr); |
} |
$this->row[$result_int] = ++$rownum; |
return DB_OK; |
} |
|
// }}} |
// {{{ freeResult() |
|
/** |
* Deletes the result set and frees the memory occupied by the result set |
* |
* This method is not meant to be called directly. Use |
* DB_result::free() instead. It can't be declared "protected" |
* because DB_result is a separate object. |
* |
* @param resource $result PHP's query result resource |
* |
* @return bool TRUE on success, FALSE if $result is invalid |
* |
* @see DB_result::free() |
*/ |
function freeResult($result) |
{ |
if (is_resource($result)) { |
unset($this->row[(int)$result]); |
unset($this->_num_rows[(int)$result]); |
$this->affected = 0; |
return @pg_freeresult($result); |
} |
return false; |
} |
|
// }}} |
// {{{ quote() |
|
/** |
* @deprecated Deprecated in release 1.6.0 |
* @internal |
*/ |
function quote($str) |
{ |
return $this->quoteSmart($str); |
} |
|
// }}} |
// {{{ quoteBoolean() |
|
/** |
* Formats a boolean value for use within a query in a locale-independent |
* manner. |
* |
* @param boolean the boolean value to be quoted. |
* @return string the quoted string. |
* @see DB_common::quoteSmart() |
* @since Method available since release 1.7.8. |
*/ |
function quoteBoolean($boolean) { |
return $boolean ? 'TRUE' : 'FALSE'; |
} |
|
// }}} |
// {{{ escapeSimple() |
|
/** |
* Escapes a string according to the current DBMS's standards |
* |
* {@internal PostgreSQL treats a backslash as an escape character, |
* so they are escaped as well. |
* |
* @param string $str the string to be escaped |
* |
* @return string the escaped string |
* |
* @see DB_common::quoteSmart() |
* @since Method available since Release 1.6.0 |
*/ |
function escapeSimple($str) |
{ |
if (function_exists('pg_escape_string')) { |
/* This fixes an undocumented BC break in PHP 5.2.0 which changed |
* the prototype of pg_escape_string. I'm not thrilled about having |
* to sniff the PHP version, quite frankly, but it's the only way |
* to deal with the problem. Revision 1.331.2.13.2.10 on |
* php-src/ext/pgsql/pgsql.c (PHP_5_2 branch) is to blame, for the |
* record. */ |
if (version_compare(PHP_VERSION, '5.2.0', '>=')) { |
return pg_escape_string($this->connection, $str); |
} else { |
return pg_escape_string($str); |
} |
} else { |
return str_replace("'", "''", str_replace('\\', '\\\\', $str)); |
} |
} |
|
// }}} |
// {{{ numCols() |
|
/** |
* Gets the number of columns in a result set |
* |
* This method is not meant to be called directly. Use |
* DB_result::numCols() instead. It can't be declared "protected" |
* because DB_result is a separate object. |
* |
* @param resource $result PHP's query result resource |
* |
* @return int the number of columns. A DB_Error object on failure. |
* |
* @see DB_result::numCols() |
*/ |
function numCols($result) |
{ |
$cols = @pg_numfields($result); |
if (!$cols) { |
return $this->pgsqlRaiseError(); |
} |
return $cols; |
} |
|
// }}} |
// {{{ numRows() |
|
/** |
* Gets the number of rows in a result set |
* |
* This method is not meant to be called directly. Use |
* DB_result::numRows() instead. It can't be declared "protected" |
* because DB_result is a separate object. |
* |
* @param resource $result PHP's query result resource |
* |
* @return int the number of rows. A DB_Error object on failure. |
* |
* @see DB_result::numRows() |
*/ |
function numRows($result) |
{ |
$rows = @pg_numrows($result); |
if ($rows === null) { |
return $this->pgsqlRaiseError(); |
} |
return $rows; |
} |
|
// }}} |
// {{{ autoCommit() |
|
/** |
* Enables or disables automatic commits |
* |
* @param bool $onoff true turns it on, false turns it off |
* |
* @return int DB_OK on success. A DB_Error object if the driver |
* doesn't support auto-committing transactions. |
*/ |
function autoCommit($onoff = false) |
{ |
// XXX if $this->transaction_opcount > 0, we should probably |
// issue a warning here. |
$this->autocommit = $onoff ? true : false; |
return DB_OK; |
} |
|
// }}} |
// {{{ commit() |
|
/** |
* Commits the current transaction |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
*/ |
function commit() |
{ |
if ($this->transaction_opcount > 0) { |
// (disabled) hack to shut up error messages from libpq.a |
//@fclose(@fopen("php://stderr", "w")); |
$result = @pg_exec($this->connection, 'end;'); |
$this->transaction_opcount = 0; |
if (!$result) { |
return $this->pgsqlRaiseError(); |
} |
} |
return DB_OK; |
} |
|
// }}} |
// {{{ rollback() |
|
/** |
* Reverts the current transaction |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
*/ |
function rollback() |
{ |
if ($this->transaction_opcount > 0) { |
$result = @pg_exec($this->connection, 'abort;'); |
$this->transaction_opcount = 0; |
if (!$result) { |
return $this->pgsqlRaiseError(); |
} |
} |
return DB_OK; |
} |
|
// }}} |
// {{{ affectedRows() |
|
/** |
* Determines the number of rows affected by a data maniuplation query |
* |
* 0 is returned for queries that don't manipulate data. |
* |
* @return int the number of rows. A DB_Error object on failure. |
*/ |
function affectedRows() |
{ |
return $this->affected; |
} |
|
// }}} |
// {{{ nextId() |
|
/** |
* Returns the next free id in a sequence |
* |
* @param string $seq_name name of the sequence |
* @param boolean $ondemand when true, the seqence is automatically |
* created if it does not exist |
* |
* @return int the next id number in the sequence. |
* A DB_Error object on failure. |
* |
* @see DB_common::nextID(), DB_common::getSequenceName(), |
* DB_pgsql::createSequence(), DB_pgsql::dropSequence() |
*/ |
function nextId($seq_name, $ondemand = true) |
{ |
$seqname = $this->getSequenceName($seq_name); |
$repeat = false; |
do { |
$this->pushErrorHandling(PEAR_ERROR_RETURN); |
$result = $this->query("SELECT NEXTVAL('${seqname}')"); |
$this->popErrorHandling(); |
if ($ondemand && DB::isError($result) && |
$result->getCode() == DB_ERROR_NOSUCHTABLE) { |
$repeat = true; |
$this->pushErrorHandling(PEAR_ERROR_RETURN); |
$result = $this->createSequence($seq_name); |
$this->popErrorHandling(); |
if (DB::isError($result)) { |
return $this->raiseError($result); |
} |
} else { |
$repeat = false; |
} |
} while ($repeat); |
if (DB::isError($result)) { |
return $this->raiseError($result); |
} |
$arr = $result->fetchRow(DB_FETCHMODE_ORDERED); |
$result->free(); |
return $arr[0]; |
} |
|
// }}} |
// {{{ createSequence() |
|
/** |
* Creates a new sequence |
* |
* @param string $seq_name name of the new sequence |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
* |
* @see DB_common::createSequence(), DB_common::getSequenceName(), |
* DB_pgsql::nextID(), DB_pgsql::dropSequence() |
*/ |
function createSequence($seq_name) |
{ |
$seqname = $this->getSequenceName($seq_name); |
$result = $this->query("CREATE SEQUENCE ${seqname}"); |
return $result; |
} |
|
// }}} |
// {{{ dropSequence() |
|
/** |
* Deletes a sequence |
* |
* @param string $seq_name name of the sequence to be deleted |
* |
* @return int DB_OK on success. A DB_Error object on failure. |
* |
* @see DB_common::dropSequence(), DB_common::getSequenceName(), |
* DB_pgsql::nextID(), DB_pgsql::createSequence() |
*/ |
function dropSequence($seq_name) |
{ |
return $this->query('DROP SEQUENCE ' |
. $this->getSequenceName($seq_name)); |
} |
|
// }}} |
// {{{ modifyLimitQuery() |
|
/** |
* Adds LIMIT clauses to a query string according to current DBMS standards |
* |
* @param string $query the query to modify |
* @param int $from the row to start to fetching (0 = the first row) |
* @param int $count the numbers of rows to fetch |
* @param mixed $params array, string or numeric data to be used in |
* execution of the statement. Quantity of items |
* passed must match quantity of placeholders in |
* query: meaning 1 placeholder for non-array |
* parameters or 1 placeholder per array element. |
* |
* @return string the query string with LIMIT clauses added |
* |
* @access protected |
*/ |
function modifyLimitQuery($query, $from, $count, $params = array()) |
{ |
return "$query LIMIT $count OFFSET $from"; |
} |
|
// }}} |
// {{{ pgsqlRaiseError() |
|
/** |
* Produces a DB_Error object regarding the current problem |
* |
* @param int $errno if the error is being manually raised pass a |
* DB_ERROR* constant here. If this isn't passed |
* the error information gathered from the DBMS. |
* |
* @return object the DB_Error object |
* |
* @see DB_common::raiseError(), |
* DB_pgsql::errorNative(), DB_pgsql::errorCode() |
*/ |
function pgsqlRaiseError($errno = null) |
{ |
$native = $this->errorNative(); |
if (!$native) { |
$native = 'Database connection has been lost.'; |
$errno = DB_ERROR_CONNECT_FAILED; |
} |
if ($errno === null) { |
$errno = $this->errorCode($native); |
} |
return $this->raiseError($errno, null, null, null, $native); |
} |
|
// }}} |
// {{{ errorNative() |
|
/** |
* Gets the DBMS' native error message produced by the last query |
* |
* {@internal Error messages are used instead of error codes |
* in order to support older versions of PostgreSQL.}} |
* |
* @return string the DBMS' error message |
*/ |
function errorNative() |
{ |
return @pg_errormessage($this->connection); |
} |
|
// }}} |
// {{{ errorCode() |
|
/** |
* Determines PEAR::DB error code from the database's text error message. |
* |
* @param string $errormsg error message returned from the database |
* @return integer an error number from a DB error constant |
*/ |
function errorCode($errormsg) |
{ |
static $error_regexps; |
if (!isset($error_regexps)) { |
$error_regexps = array( |
'/column .* (of relation .*)?does not exist/i' |
=> DB_ERROR_NOSUCHFIELD, |
'/(relation|sequence|table).*does not exist|class .* not found/i' |
=> DB_ERROR_NOSUCHTABLE, |
'/index .* does not exist/' |
=> DB_ERROR_NOT_FOUND, |
'/relation .* already exists/i' |
=> DB_ERROR_ALREADY_EXISTS, |
'/(divide|division) by zero$/i' |
=> DB_ERROR_DIVZERO, |
'/pg_atoi: error in .*: can\'t parse /i' |
=> DB_ERROR_INVALID_NUMBER, |
'/invalid input syntax for( type)? (integer|numeric)/i' |
=> DB_ERROR_INVALID_NUMBER, |
'/value .* is out of range for type \w*int/i' |
=> DB_ERROR_INVALID_NUMBER, |
'/integer out of range/i' |
=> DB_ERROR_INVALID_NUMBER, |
'/value too long for type character/i' |
=> DB_ERROR_INVALID, |
'/attribute .* not found|relation .* does not have attribute/i' |
=> DB_ERROR_NOSUCHFIELD, |
'/column .* specified in USING clause does not exist in (left|right) table/i' |
=> DB_ERROR_NOSUCHFIELD, |
'/parser: parse error at or near/i' |
=> DB_ERROR_SYNTAX, |
'/syntax error at/' |
=> DB_ERROR_SYNTAX, |
'/column reference .* is ambiguous/i' |
=> DB_ERROR_SYNTAX, |
'/permission denied/' |
=> DB_ERROR_ACCESS_VIOLATION, |
'/violates not-null constraint/' |
=> DB_ERROR_CONSTRAINT_NOT_NULL, |
'/violates [\w ]+ constraint/' |
=> DB_ERROR_CONSTRAINT, |
'/referential integrity violation/' |
=> DB_ERROR_CONSTRAINT, |
'/more expressions than target columns/i' |
=> DB_ERROR_VALUE_COUNT_ON_ROW, |
); |
} |
foreach ($error_regexps as $regexp => $code) { |
if (preg_match($regexp, $errormsg)) { |
return $code; |
} |
} |
// Fall back to DB_ERROR if there was no mapping. |
return DB_ERROR; |
} |
|
// }}} |
// {{{ tableInfo() |
|
/** |
* Returns information about a table or a result set |
* |
* NOTE: only supports 'table' and 'flags' if <var>$result</var> |
* is a table name. |
* |
* @param object|string $result DB_result object from a query or a |
* string containing the name of a table. |
* While this also accepts a query result |
* resource identifier, this behavior is |
* deprecated. |
* @param int $mode a valid tableInfo mode |
* |
* @return array an associative array with the information requested. |
* A DB_Error object on failure. |
* |
* @see DB_common::tableInfo() |
*/ |
function tableInfo($result, $mode = null) |
{ |
if (is_string($result)) { |
/* |
* Probably received a table name. |
* Create a result resource identifier. |
*/ |
$id = @pg_exec($this->connection, "SELECT * FROM $result LIMIT 0"); |
$got_string = true; |
} elseif (isset($result->result)) { |
/* |
* Probably received a result object. |
* Extract the result resource identifier. |
*/ |
$id = $result->result; |
$got_string = false; |
} else { |
/* |
* Probably received a result resource identifier. |
* Copy it. |
* Deprecated. Here for compatibility only. |
*/ |
$id = $result; |
$got_string = false; |
} |
|
if (!is_resource($id)) { |
return $this->pgsqlRaiseError(DB_ERROR_NEED_MORE_DATA); |
} |
|
if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) { |
$case_func = 'strtolower'; |
} else { |
$case_func = 'strval'; |
} |
|
$count = @pg_numfields($id); |
$res = array(); |
|
if ($mode) { |
$res['num_fields'] = $count; |
} |
|
for ($i = 0; $i < $count; $i++) { |
$res[$i] = array( |
'table' => $got_string ? $case_func($result) : '', |
'name' => $case_func(@pg_fieldname($id, $i)), |
'type' => @pg_fieldtype($id, $i), |
'len' => @pg_fieldsize($id, $i), |
'flags' => $got_string |
? $this->_pgFieldFlags($id, $i, $result) |
: '', |
); |
if ($mode & DB_TABLEINFO_ORDER) { |
$res['order'][$res[$i]['name']] = $i; |
} |
if ($mode & DB_TABLEINFO_ORDERTABLE) { |
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i; |
} |
} |
|
// free the result only if we were called on a table |
if ($got_string) { |
@pg_freeresult($id); |
} |
return $res; |
} |
|
// }}} |
// {{{ _pgFieldFlags() |
|
/** |
* Get a column's flags |
* |
* Supports "not_null", "default_value", "primary_key", "unique_key" |
* and "multiple_key". The default value is passed through |
* rawurlencode() in case there are spaces in it. |
* |
* @param int $resource the PostgreSQL result identifier |
* @param int $num_field the field number |
* |
* @return string the flags |
* |
* @access private |
*/ |
function _pgFieldFlags($resource, $num_field, $table_name) |
{ |
$field_name = @pg_fieldname($resource, $num_field); |
|
// Check if there's a schema in $table_name and update things |
// accordingly. |
$from = 'pg_attribute f, pg_class tab, pg_type typ'; |
if (strpos($table_name, '.') !== false) { |
$from .= ', pg_namespace nsp'; |
list($schema, $table) = explode('.', $table_name); |
$tableWhere = "tab.relname = '$table' AND tab.relnamespace = nsp.oid AND nsp.nspname = '$schema'"; |
} else { |
$tableWhere = "tab.relname = '$table_name'"; |
} |
|
$result = @pg_exec($this->connection, "SELECT f.attnotnull, f.atthasdef |
FROM $from |
WHERE tab.relname = typ.typname |
AND typ.typrelid = f.attrelid |
AND f.attname = '$field_name' |
AND $tableWhere"); |
if (@pg_numrows($result) > 0) { |
$row = @pg_fetch_row($result, 0); |
$flags = ($row[0] == 't') ? 'not_null ' : ''; |
|
if ($row[1] == 't') { |
$result = @pg_exec($this->connection, "SELECT a.adsrc |
FROM $from, pg_attrdef a |
WHERE tab.relname = typ.typname AND typ.typrelid = f.attrelid |
AND f.attrelid = a.adrelid AND f.attname = '$field_name' |
AND $tableWhere AND f.attnum = a.adnum"); |
$row = @pg_fetch_row($result, 0); |
$num = preg_replace("/'(.*)'::\w+/", "\\1", $row[0]); |
$flags .= 'default_' . rawurlencode($num) . ' '; |
} |
} else { |
$flags = ''; |
} |
$result = @pg_exec($this->connection, "SELECT i.indisunique, i.indisprimary, i.indkey |
FROM $from, pg_index i |
WHERE tab.relname = typ.typname |
AND typ.typrelid = f.attrelid |
AND f.attrelid = i.indrelid |
AND f.attname = '$field_name' |
AND $tableWhere"); |
$count = @pg_numrows($result); |
|
for ($i = 0; $i < $count ; $i++) { |
$row = @pg_fetch_row($result, $i); |
$keys = explode(' ', $row[2]); |
|
if (in_array($num_field + 1, $keys)) { |
$flags .= ($row[0] == 't' && $row[1] == 'f') ? 'unique_key ' : ''; |
$flags .= ($row[1] == 't') ? 'primary_key ' : ''; |
if (count($keys) > 1) |
$flags .= 'multiple_key '; |
} |
} |
|
return trim($flags); |
} |
|
// }}} |
// {{{ getSpecialQuery() |
|
/** |
* Obtains the query string needed for listing a given type of objects |
* |
* @param string $type the kind of objects you want to retrieve |
* |
* @return string the SQL query string or null if the driver doesn't |
* support the object type requested |
* |
* @access protected |
* @see DB_common::getListOf() |
*/ |
function getSpecialQuery($type) |
{ |
switch ($type) { |
case 'tables': |
return 'SELECT c.relname AS "Name"' |
. ' FROM pg_class c, pg_user u' |
. ' WHERE c.relowner = u.usesysid' |
. " AND c.relkind = 'r'" |
. ' AND NOT EXISTS' |
. ' (SELECT 1 FROM pg_views' |
. ' WHERE viewname = c.relname)' |
. " AND c.relname !~ '^(pg_|sql_)'" |
. ' UNION' |
. ' SELECT c.relname AS "Name"' |
. ' FROM pg_class c' |
. " WHERE c.relkind = 'r'" |
. ' AND NOT EXISTS' |
. ' (SELECT 1 FROM pg_views' |
. ' WHERE viewname = c.relname)' |
. ' AND NOT EXISTS' |
. ' (SELECT 1 FROM pg_user' |
. ' WHERE usesysid = c.relowner)' |
. " AND c.relname !~ '^pg_'"; |
case 'schema.tables': |
return "SELECT schemaname || '.' || tablename" |
. ' AS "Name"' |
. ' FROM pg_catalog.pg_tables' |
. ' WHERE schemaname NOT IN' |
. " ('pg_catalog', 'information_schema', 'pg_toast')"; |
case 'schema.views': |
return "SELECT schemaname || '.' || viewname from pg_views WHERE schemaname" |
. " NOT IN ('information_schema', 'pg_catalog')"; |
case 'views': |
// Table cols: viewname | viewowner | definition |
return 'SELECT viewname from pg_views WHERE schemaname' |
. " NOT IN ('information_schema', 'pg_catalog')"; |
case 'users': |
// cols: usename |usesysid|usecreatedb|usetrace|usesuper|usecatupd|passwd |valuntil |
return 'SELECT usename FROM pg_user'; |
case 'databases': |
return 'SELECT datname FROM pg_database'; |
case 'functions': |
case 'procedures': |
return 'SELECT proname FROM pg_proc WHERE proowner <> 1'; |
default: |
return null; |
} |
} |
|
// }}} |
// {{{ _checkManip() |
|
/** |
* Checks if the given query is a manipulation query. This also takes into |
* account the _next_query_manip flag and sets the _last_query_manip flag |
* (and resets _next_query_manip) according to the result. |
* |
* @param string The query to check. |
* |
* @return boolean true if the query is a manipulation query, false |
* otherwise |
* |
* @access protected |
*/ |
function _checkManip($query) |
{ |
return (preg_match('/^\s*(SAVEPOINT|RELEASE)\s+/i', $query) |
|| parent::_checkManip($query)); |
} |
|
} |
|
/* |
* Local variables: |
* tab-width: 4 |
* c-basic-offset: 4 |
* End: |
*/ |
|
?> |