Source for file pgsql.php
Documentation is available at pgsql.php
// +----------------------------------------------------------------------+
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
// | API as well as database abstraction for PHP applications. |
// | This LICENSE is in the BSD license style. |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution. |
// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
// | Lukas Smith nor the names of his contributors may be used to endorse |
// | or promote products derived from this software without specific prior|
// | written permission. |
// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
// | POSSIBILITY OF SUCH DAMAGE. |
// +----------------------------------------------------------------------+
// | Author: Paul Cooper <pgc@ucecom.com> |
// +----------------------------------------------------------------------+
// $Id: pgsql.php,v 1.4 2004/03/28 12:12:11 lsmith Exp $
require_once 'MDB2/Driver/Datatype/Common.php';
* @author Paul Cooper <pgc@ucecom.com>
* convert a value to a RDBMS indepdenant MDB2 type
* @param mixed $value value to be converted
* @param int $type constant that specifies which type to convert to
* @return mixed converted value or a MDB2 error on failure
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
return $this->_baseConvertResult ($value, $type);
// {{{ getTextDeclaration()
* Obtain DBMS specific SQL code portion needed to declare an text type
* field to be used in statements like CREATE TABLE.
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
* Integer value that determines the maximum length of the text
* field. If this argument is missing the field should be
* declared to have the longest length allowed by the DBMS.
* Text value to be used as default for this field.
* Boolean flag that indicates whether this field is constrained
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
$type = isset ($field['length']) ? 'VARCHAR ('. $field['length']. ')' : 'TEXT';
$default = isset ($field['default']) ? ' DEFAULT TIME'.
$notnull = isset ($field['notnull']) ? ' NOT NULL' : '';
return $name. ' '. $type. $default. $notnull;
// {{{ getCLOBDeclaration()
* Obtain DBMS specific SQL code portion needed to declare an character
* large object type field to be used in statements like CREATE TABLE.
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
* Integer value that determines the maximum length of the large
* object field. If this argument is missing the field should be
* declared to have the longest length allowed by the DBMS.
* Boolean flag that indicates whether this field is constrained
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
$notnull = isset ($field['notnull']) ? ' NOT NULL' : '';
return $name. ' OID'. $notnull;
// {{{ getBLOBDeclaration()
* Obtain DBMS specific SQL code portion needed to declare an binary large
* object type field to be used in statements like CREATE TABLE.
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
* Integer value that determines the maximum length of the large
* object field. If this argument is missing the field should be
* declared to have the longest length allowed by the DBMS.
* Boolean flag that indicates whether this field is constrained
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
$notnull = isset ($field['notnull']) ? ' NOT NULL' : '';
return $name. ' OID'. $notnull;
// {{{ getBooleanDeclaration()
* Obtain DBMS specific SQL code portion needed to declare a boolean type
* field to be used in statements like CREATE TABLE.
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
* Boolean value to be used as default for this field.
* Boolean flag that indicates whether this field is constrained
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
$default = isset ($field['default']) ? ' DEFAULT '.
$notnull = isset ($field['notnull']) ? ' NOT NULL' : '';
return $name. ' BOOLEAN'. $default. $notnull;
// {{{ getDateDeclaration()
* Obtain DBMS specific SQL code portion needed to declare a date type
* field to be used in statements like CREATE TABLE.
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
* Date value to be used as default for this field.
* Boolean flag that indicates whether this field is constrained
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
$default = isset ($field['default']) ? ' DEFAULT '.
$notnull = isset ($field['notnull']) ? ' NOT NULL' : '';
return $name. ' DATE'. $default. $notnull;
// {{{ getTimeDeclaration()
* Obtain DBMS specific SQL code portion needed to declare a time
* field to be used in statements like CREATE TABLE.
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
* Time value to be used as default for this field.
* Boolean flag that indicates whether this field is constrained
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
$default = isset ($field['default']) ? ' DEFAULT '.
$notnull = isset ($field['notnull']) ? ' NOT NULL' : '';
return $name. ' TIME without time zone'. $default. $notnull;
// {{{ getTimestampDeclaration()
* Obtain DBMS specific SQL code portion needed to declare a timestamp
* field to be used in statements like CREATE TABLE.
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
* Timestamp value to be used as default for this field.
* Boolean flag that indicates whether this field is constrained
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
$default = isset ($field['default']) ? ' DEFAULT '.
$notnull = isset ($field['notnull']) ? ' NOT NULL' : '';
return $name. ' TIMESTAMP without time zone'. $default. $notnull;
// {{{ getFloatDeclaration()
* Obtain DBMS specific SQL code portion needed to declare a float type
* field to be used in statements like CREATE TABLE.
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
* Float value to be used as default for this field.
* Boolean flag that indicates whether this field is constrained
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
$default = isset ($field['default']) ? ' DEFAULT '.
$notnull = isset ($field['notnull']) ? ' NOT NULL' : '';
return $name. ' FLOAT8'. $default. $notnull;
// {{{ getDecimalDeclaration()
* Obtain DBMS specific SQL code portion needed to declare a decimal type
* field to be used in statements like CREATE TABLE.
* @param string $name name the field to be declared.
* @param string $field associative array with the name of the properties
* of the field being declared as array indexes. Currently, the types
* of supported field properties are as follows:
* Decimal value to be used as default for this field.
* Boolean flag that indicates whether this field is constrained
* @return string DBMS specific SQL code portion that should be used to
* declare the specified field.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
$default = isset ($field['default']) ? ' DEFAULT '.
$notnull = isset ($field['notnull']) ? ' NOT NULL' : '';
return $name. ' NUMERIC(18, '. $db->options ['decimal_places']. ')'. $default. $notnull;
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
* @param resource $prepared_query query handle from prepare()
* @return string text string that represents the given argument value in
* a DBMS specific format.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
$connect = $db->connect ();
$prepared_query = $GLOBALS['_MDB2_LOBs'][$lob]->prepared_query;
$parameter = $GLOBALS['_MDB2_LOBs'][$lob]->parameter;
if ($db->auto_commit && !@pg_exec ($db->connection , 'BEGIN')) {
'error starting transaction');
if (($lo = @pg_locreate ($db->connection ))) {
if (($handle = @pg_loopen ($db->connection , $lo, 'w'))) {
$result = $this->readLOB($lob, $data, $db->options ['lob_buffer_length']);
if (!pg_lowrite ($handle, $data)) {
$result = $db->raiseError ();
$result = $db->raiseError ();
$result = @pg_lounlink ($db->connection , $lo);
$result = $db->raiseError ();
@pg_exec ($db->connection , 'END');
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
* @return string text string that represents the given argument value in
* a DBMS specific format.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
return $this->_quoteLOB ($clob);
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
* @return string text string that represents the given argument value in
* a DBMS specific format.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
return $this->_quoteLOB ($blob);
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
* @param string $value text string value that is intended to be converted.
* @return string text string that represents the given argument value in
* a DBMS specific format.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
return ($value === null ) ? 'NULL' : ($value ? "'t'" : "'f'");
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
* @param string $value text string value that is intended to be converted.
* @return string text string that represents the given argument value in
* a DBMS specific format.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
return ($value === null ) ? 'NULL' : $value;
* Convert a text value into a DBMS specific format that is suitable to
* compose query statements.
* @param string $value text string value that is intended to be converted.
* @return string text string that represents the given argument value in
* a DBMS specific format.
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
return ($value === null ) ? 'NULL' : $value;
* retrieve LOB from the database
* @param int $lob handle to a lob created by the createLOB() function
* @return mixed MDB2_OK on success, a MDB2 error on failure
function _retrieveLOB ($lob)
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
if (!isset ($db->lobs [$lob])) {
'did not specified a valid lob');
if (!isset ($db->lobs [$lob]['handle'])) {
if (!pg_exec ($db->connection , 'BEGIN')) {
return $db->raiseError ();
$db->lobs [$lob]['in_transaction'] = true;
$db->lobs [$lob]['handle'] =
@pg_loopen ($db->connection , $db->lobs [$lob]['value'], 'r');
if (!$db->lobs [$lob]['handle']) {
if (isset ($db->lobs [$lob]['in_transaction'])) {
@pg_Exec ($db->connection , 'END');
unset ($db->lobs [$lob]['in_transaction']);
unset ($db->lobs [$lob]['value']);
return $db->raiseError ();
* Determine whether it was reached the end of the large object and
* therefore there is no more data to be read for the its input stream.
* @param int $lob handle to a lob created by the createLOB() function
* @return mixed true or false on success, a MDB2 error on failure
function _endOfResultLOB ($lob)
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
$lobresult = $this->_retrieveLOB ($lob);
return isset ($db->lobs [$lob]['end_of_LOB']);
* Read data from large object input stream.
* @param int $lob handle to a lob created by the createLOB() function
* @param blob $data reference to a variable that will hold data to be
* read from the large object input stream
* @param int $length integer value that indicates the largest ammount of
* data to be read from the large object input stream.
* @return mixed length on success, a MDB2 error on failure
function _readResultLOB ($lob, &$data, $length)
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
$lobresult = $this->_retrieveLOB ($lob);
$data = @pg_loread ($db->lobs [$lob]['handle'], $length);
return $db->raiseError ();
if (($length = strlen($data)) == 0 ) {
$db->lobs [$lob]['end_of_LOB'] = true;
// {{{ _destroyResultLOB()
* Free any resources allocated during the lifetime of the large object
* @param int $lob handle to a lob created by the createLOB() function
function _destroyResultLOB ($lob)
$db = & $GLOBALS['_MDB2_databases'][$this->db_index];
if (isset ($db->lobs [$lob])) {
if (isset ($db->lobs [$lob]['value'])) {
@pg_loclose ($db->lobs [$lob]['handle']);
if (isset ($db->lobs [$lob]['in_transaction'])) {
@pg_Exec ($db->connection , 'END');
Documentation generated on Mon, 11 Mar 2019 10:15:54 -0400 by phpDocumentor 1.4.4. PEAR Logo Copyright © PHP Group 2004.
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