+++ /dev/null
-<?php
-
-/**
- * This is PostgreSQL database abstraction layer.
- *
- * As it includes more generic version for DB functions,
- * than MySQL ones, some of them should be moved to parent
- * Database class.
- *
- * STATUS: Working PG implementation of MediaWiki
- * TODO: Installer support
- *
- * @package MediaWiki
- */
-
-/**
- * Depends on database
- */
-require_once( 'Database.php' );
-
-/**
- *
- * @package MediaWiki
- */
-class DatabasePostgres extends Database {
- var $mInsertId = NULL;
- var $mLastResult = NULL;
-
- function DatabasePostgres($server = false, $user = false, $password = false, $dbName = false,
- $failFunction = false, $flags = 0, $tablePrefix = 'get from global' )
- {
- Database::Database( $server, $user, $password, $dbName, $failFunction, $flags, $tablePrefix );
- }
-
- /* static */ function newFromParams( $server = false, $user = false, $password = false, $dbName = false,
- $failFunction = false, $flags = 0, $tablePrefix = 'get from global' )
- {
- return new DatabasePostgres( $server, $user, $password, $dbName, $failFunction, $flags, $tablePrefix );
- }
-
- /**
- * Usually aborts on failure
- * If the failFunction is set to a non-zero integer, returns success
- */
- function open( $server, $user, $password, $dbName ) {
- # Test for PostgreSQL support, to avoid suppressed fatal error
- if ( !function_exists( 'pg_connect' ) ) {
- throw new DBConnectionError( $this, "PostgreSQL functions missing, have you compiled PHP with the --with-pgsql option?\n" );
- }
-
- global $wgDBschema;
-
- $this->close();
- $this->mServer = $server;
- $this->mUser = $user;
- $this->mPassword = $password;
- $this->mDBname = $dbName;
- $this->mSchemas = array($wgDBschema,'public');
-
- $success = false;
-
- if ( '' != $dbName ) {
- # start a database connection
- $hstring="";
- if ($server!=false && $server!="") {
- $hstring="host=$server ";
- }
- @$this->mConn = pg_connect("$hstring dbname=$dbName user=$user password=$password");
- if ( $this->mConn == false ) {
- wfDebug( "DB connection error\n" );
- wfDebug( "Server: $server, Database: $dbName, User: $user, Password: " . substr( $password, 0, 3 ) . "...\n" );
- wfDebug( $this->lastError()."\n" );
- } else {
- $this->setSchema();
- $this->mOpened = true;
- }
- }
- return $this->mConn;
- }
-
- /**
- * Closes a database connection, if it is open
- * Returns success, true if already closed
- */
- function close() {
- $this->mOpened = false;
- if ( $this->mConn ) {
- return pg_close( $this->mConn );
- } else {
- return true;
- }
- }
-
- function doQuery( $sql ) {
- return $this->mLastResult=pg_query( $this->mConn , $sql);
- }
-
- function queryIgnore( $sql, $fname = '' ) {
- return $this->query( $sql, $fname, true );
- }
-
- function freeResult( $res ) {
- if ( !@pg_free_result( $res ) ) {
- throw new DBUnexpectedError($this, "Unable to free PostgreSQL result\n" );
- }
- }
-
- function fetchObject( $res ) {
- @$row = pg_fetch_object( $res );
- # FIXME: HACK HACK HACK HACK debug
-
- # TODO:
- # hashar : not sure if the following test really trigger if the object
- # fetching failled.
- if( pg_last_error($this->mConn) ) {
- throw new DBUnexpectedError($this, 'SQL error: ' . htmlspecialchars( pg_last_error($this->mConn) ) );
- }
- return $row;
- }
-
- function fetchRow( $res ) {
- @$row = pg_fetch_array( $res );
- if( pg_last_error($this->mConn) ) {
- throw new DBUnexpectedError($this, 'SQL error: ' . htmlspecialchars( pg_last_error($this->mConn) ) );
- }
- return $row;
- }
-
- function numRows( $res ) {
- @$n = pg_num_rows( $res );
- if( pg_last_error($this->mConn) ) {
- throw new DBUnexpectedError($this, 'SQL error: ' . htmlspecialchars( pg_last_error($this->mConn) ) );
- }
- return $n;
- }
- function numFields( $res ) { return pg_num_fields( $res ); }
- function fieldName( $res, $n ) { return pg_field_name( $res, $n ); }
-
- /**
- * This must be called after nextSequenceVal
- */
- function insertId() {
- return $this->mInsertId;
- }
-
- function dataSeek( $res, $row ) { return pg_result_seek( $res, $row ); }
- function lastError() { return pg_last_error(); }
- function lastErrno() { return 1; }
-
- function affectedRows() {
- return pg_affected_rows( $this->mLastResult );
- }
-
- /**
- * Returns information about an index
- * If errors are explicitly ignored, returns NULL on failure
- */
- function indexInfo( $table, $index, $fname = 'Database::indexExists' ) {
- $sql = "SELECT indexname FROM pg_indexes WHERE tablename='$table'";
- $res = $this->query( $sql, $fname );
- if ( !$res ) {
- return NULL;
- }
-
- while ( $row = $this->fetchObject( $res ) ) {
- if ( $row->Key_name == $index ) {
- return $row;
- }
- }
- return false;
- }
-
- function indexUnique ($table, $index, $fname = 'Database::indexUnique' ) {
- $sql = "SELECT indexname FROM pg_indexes WHERE tablename='{$table}'".
- " AND indexdef LIKE 'CREATE UNIQUE%({$index})'";
- $res = $this->query( $sql, $fname );
- if ( !$res )
- return NULL;
- while ($row = $this->fetchObject( $res ))
- return true;
- return false;
-
- }
-
- function fieldInfo( $table, $field ) {
- throw new DBUnexpectedError($this, 'Database::fieldInfo() error : mysql_fetch_field() not implemented for postgre' );
- /*
- $res = $this->query( "SELECT * FROM '$table' LIMIT 1" );
- $n = pg_num_fields( $res );
- for( $i = 0; $i < $n; $i++ ) {
- // FIXME
- throw new DBUnexpectedError($this, "Database::fieldInfo() error : mysql_fetch_field() not implemented for postgre" );
- $meta = mysql_fetch_field( $res, $i );
- if( $field == $meta->name ) {
- return $meta;
- }
- }
- return false;*/
- }
-
- function insert( $table, $a, $fname = 'Database::insert', $options = array() ) {
- # PostgreSQL doesn't support options
- # We have a go at faking one of them
- # TODO: DELAYED, LOW_PRIORITY
-
- if ( !is_array($options))
- $options = array($options);
-
- if ( in_array( 'IGNORE', $options ) )
- $oldIgnore = $this->ignoreErrors( true );
-
- # IGNORE is performed using single-row inserts, ignoring errors in each
- # FIXME: need some way to distiguish between key collision and other types of error
- $oldIgnore = $this->ignoreErrors( true );
- if ( !is_array( reset( $a ) ) ) {
- $a = array( $a );
- }
- foreach ( $a as $row ) {
- parent::insert( $table, $row, $fname, array() );
- }
- $this->ignoreErrors( $oldIgnore );
- $retVal = true;
-
- if ( in_array( 'IGNORE', $options ) )
- $this->ignoreErrors( $oldIgnore );
-
- return $retVal;
- }
-
- function tableName( $name ) {
- # First run any transformations from the parent object
- $name = parent::tableName( $name );
-
- # Replace backticks into double quotes
- $name = strtr($name,'`','"');
-
- # Now quote PG reserved keywords
- switch( $name ) {
- case 'user':
- case 'old':
- case 'group':
- return '"' . $name . '"';
-
- default:
- return $name;
- }
- }
-
- function strencode( $s ) {
- return pg_escape_string( $s );
- }
-
- /**
- * Return the next in a sequence, save the value for retrieval via insertId()
- */
- function nextSequenceValue( $seqName ) {
- $value = $this->selectField(''," nextval('" . $seqName . "')");
- $this->mInsertId = $value;
- return $value;
- }
-
- /**
- * USE INDEX clause
- * PostgreSQL doesn't have them and returns ""
- */
- function useIndexClause( $index ) {
- return '';
- }
-
- # REPLACE query wrapper
- # PostgreSQL simulates this with a DELETE followed by INSERT
- # $row is the row to insert, an associative array
- # $uniqueIndexes is an array of indexes. Each element may be either a
- # field name or an array of field names
- #
- # It may be more efficient to leave off unique indexes which are unlikely to collide.
- # However if you do this, you run the risk of encountering errors which wouldn't have
- # occurred in MySQL
- function replace( $table, $uniqueIndexes, $rows, $fname = 'Database::replace' ) {
- $table = $this->tableName( $table );
-
- if (count($rows)==0) {
- return;
- }
-
- # Single row case
- if ( !is_array( reset( $rows ) ) ) {
- $rows = array( $rows );
- }
-
- foreach( $rows as $row ) {
- # Delete rows which collide
- if ( $uniqueIndexes ) {
- $sql = "DELETE FROM $table WHERE ";
- $first = true;
- foreach ( $uniqueIndexes as $index ) {
- if ( $first ) {
- $first = false;
- $sql .= "(";
- } else {
- $sql .= ') OR (';
- }
- if ( is_array( $index ) ) {
- $first2 = true;
- foreach ( $index as $col ) {
- if ( $first2 ) {
- $first2 = false;
- } else {
- $sql .= ' AND ';
- }
- $sql .= $col.'=' . $this->addQuotes( $row[$col] );
- }
- } else {
- $sql .= $index.'=' . $this->addQuotes( $row[$index] );
- }
- }
- $sql .= ')';
- $this->query( $sql, $fname );
- }
-
- # Now insert the row
- $sql = "INSERT INTO $table (" . $this->makeList( array_keys( $row ), LIST_NAMES ) .') VALUES (' .
- $this->makeList( $row, LIST_COMMA ) . ')';
- $this->query( $sql, $fname );
- }
- }
-
- # DELETE where the condition is a join
- function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = "Database::deleteJoin" ) {
- if ( !$conds ) {
- throw new DBUnexpectedError($this, 'Database::deleteJoin() called with empty $conds' );
- }
-
- $delTable = $this->tableName( $delTable );
- $joinTable = $this->tableName( $joinTable );
- $sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
- if ( $conds != '*' ) {
- $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
- }
- $sql .= ')';
-
- $this->query( $sql, $fname );
- }
-
- # Returns the size of a text field, or -1 for "unlimited"
- function textFieldSize( $table, $field ) {
- $table = $this->tableName( $table );
- $sql = "SELECT t.typname as ftype,a.atttypmod as size
- FROM pg_class c, pg_attribute a, pg_type t
- WHERE relname='$table' AND a.attrelid=c.oid AND
- a.atttypid=t.oid and a.attname='$field'";
- $res =$this->query($sql);
- $row=$this->fetchObject($res);
- if ($row->ftype=="varchar") {
- $size=$row->size-4;
- } else {
- $size=$row->size;
- }
- $this->freeResult( $res );
- return $size;
- }
-
- function lowPriorityOption() {
- return '';
- }
-
- function limitResult($sql, $limit,$offset) {
- return "$sql LIMIT $limit ".(is_numeric($offset)?" OFFSET {$offset} ":"");
- }
-
- /**
- * Returns an SQL expression for a simple conditional.
- * Uses CASE on PostgreSQL.
- *
- * @param string $cond SQL expression which will result in a boolean value
- * @param string $trueVal SQL expression to return if true
- * @param string $falseVal SQL expression to return if false
- * @return string SQL fragment
- */
- function conditional( $cond, $trueVal, $falseVal ) {
- return " (CASE WHEN $cond THEN $trueVal ELSE $falseVal END) ";
- }
-
- # FIXME: actually detecting deadlocks might be nice
- function wasDeadlock() {
- return false;
- }
-
- # Return DB-style timestamp used for MySQL schema
- function timestamp( $ts=0 ) {
- return wfTimestamp(TS_DB,$ts);
- }
-
- /**
- * Return aggregated value function call
- */
- function aggregateValue ($valuedata,$valuename='value') {
- return $valuedata;
- }
-
-
- function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
- $message = "A database error has occurred\n" .
- "Query: $sql\n" .
- "Function: $fname\n" .
- "Error: $errno $error\n";
- throw new DBUnexpectedError($this, $message);
- }
-
- /**
- * @return string wikitext of a link to the server software's web site
- */
- function getSoftwareLink() {
- return "[http://www.postgresql.org/ PostgreSQL]";
- }
-
- /**
- * @return string Version information from the database
- */
- function getServerVersion() {
- $res = $this->query( "SELECT version()" );
- $row = $this->fetchRow( $res );
- $version = $row[0];
- $this->freeResult( $res );
- return $version;
- }
-
- function setSchema($schema=false) {
- $schemas=$this->mSchemas;
- if ($schema) { array_unshift($schemas,$schema); }
- $searchpath=$this->makeList($schemas,LIST_NAMES);
- $this->query("SET search_path = $searchpath");
- }
-}
-
-?>
--- /dev/null
+<?php
+
+/**
+ * This is PostgreSQL database abstraction layer.
+ *
+ * As it includes more generic version for DB functions,
+ * than MySQL ones, some of them should be moved to parent
+ * Database class.
+ *
+ * STATUS: Working PG implementation of MediaWiki
+ * TODO: Installer support
+ *
+ * @package MediaWiki
+ */
+
+/**
+ * Depends on database
+ */
+require_once( 'Database.php' );
+
+/**
+ *
+ * @package MediaWiki
+ */
+class DatabasePostgres extends Database {
+ var $mInsertId = NULL;
+ var $mLastResult = NULL;
+
+ function DatabasePostgres($server = false, $user = false, $password = false, $dbName = false,
+ $failFunction = false, $flags = 0, $tablePrefix = 'get from global' )
+ {
+ Database::Database( $server, $user, $password, $dbName, $failFunction, $flags, $tablePrefix );
+ }
+
+ /* static */ function newFromParams( $server = false, $user = false, $password = false, $dbName = false,
+ $failFunction = false, $flags = 0, $tablePrefix = 'get from global' )
+ {
+ return new DatabasePostgres( $server, $user, $password, $dbName, $failFunction, $flags, $tablePrefix );
+ }
+
+ /**
+ * Usually aborts on failure
+ * If the failFunction is set to a non-zero integer, returns success
+ */
+ function open( $server, $user, $password, $dbName ) {
+ # Test for PostgreSQL support, to avoid suppressed fatal error
+ if ( !function_exists( 'pg_connect' ) ) {
+ throw new DBConnectionError( $this, "PostgreSQL functions missing, have you compiled PHP with the --with-pgsql option?\n" );
+ }
+
+ global $wgDBschema;
+
+ $this->close();
+ $this->mServer = $server;
+ $this->mUser = $user;
+ $this->mPassword = $password;
+ $this->mDBname = $dbName;
+ $this->mSchemas = array($wgDBschema,'public');
+
+ $success = false;
+
+ if ( '' != $dbName ) {
+ # start a database connection
+ $hstring="";
+ if ($server!=false && $server!="") {
+ $hstring="host=$server ";
+ }
+ @$this->mConn = pg_connect("$hstring dbname=$dbName user=$user password=$password");
+ if ( $this->mConn == false ) {
+ wfDebug( "DB connection error\n" );
+ wfDebug( "Server: $server, Database: $dbName, User: $user, Password: " . substr( $password, 0, 3 ) . "...\n" );
+ wfDebug( $this->lastError()."\n" );
+ } else {
+ $this->setSchema();
+ $this->mOpened = true;
+ }
+ }
+ return $this->mConn;
+ }
+
+ /**
+ * Closes a database connection, if it is open
+ * Returns success, true if already closed
+ */
+ function close() {
+ $this->mOpened = false;
+ if ( $this->mConn ) {
+ return pg_close( $this->mConn );
+ } else {
+ return true;
+ }
+ }
+
+ function doQuery( $sql ) {
+ return $this->mLastResult=pg_query( $this->mConn , $sql);
+ }
+
+ function queryIgnore( $sql, $fname = '' ) {
+ return $this->query( $sql, $fname, true );
+ }
+
+ function freeResult( $res ) {
+ if ( !@pg_free_result( $res ) ) {
+ throw new DBUnexpectedError($this, "Unable to free PostgreSQL result\n" );
+ }
+ }
+
+ function fetchObject( $res ) {
+ @$row = pg_fetch_object( $res );
+ # FIXME: HACK HACK HACK HACK debug
+
+ # TODO:
+ # hashar : not sure if the following test really trigger if the object
+ # fetching failled.
+ if( pg_last_error($this->mConn) ) {
+ throw new DBUnexpectedError($this, 'SQL error: ' . htmlspecialchars( pg_last_error($this->mConn) ) );
+ }
+ return $row;
+ }
+
+ function fetchRow( $res ) {
+ @$row = pg_fetch_array( $res );
+ if( pg_last_error($this->mConn) ) {
+ throw new DBUnexpectedError($this, 'SQL error: ' . htmlspecialchars( pg_last_error($this->mConn) ) );
+ }
+ return $row;
+ }
+
+ function numRows( $res ) {
+ @$n = pg_num_rows( $res );
+ if( pg_last_error($this->mConn) ) {
+ throw new DBUnexpectedError($this, 'SQL error: ' . htmlspecialchars( pg_last_error($this->mConn) ) );
+ }
+ return $n;
+ }
+ function numFields( $res ) { return pg_num_fields( $res ); }
+ function fieldName( $res, $n ) { return pg_field_name( $res, $n ); }
+
+ /**
+ * This must be called after nextSequenceVal
+ */
+ function insertId() {
+ return $this->mInsertId;
+ }
+
+ function dataSeek( $res, $row ) { return pg_result_seek( $res, $row ); }
+ function lastError() { return pg_last_error(); }
+ function lastErrno() { return 1; }
+
+ function affectedRows() {
+ return pg_affected_rows( $this->mLastResult );
+ }
+
+ /**
+ * Returns information about an index
+ * If errors are explicitly ignored, returns NULL on failure
+ */
+ function indexInfo( $table, $index, $fname = 'Database::indexExists' ) {
+ $sql = "SELECT indexname FROM pg_indexes WHERE tablename='$table'";
+ $res = $this->query( $sql, $fname );
+ if ( !$res ) {
+ return NULL;
+ }
+
+ while ( $row = $this->fetchObject( $res ) ) {
+ if ( $row->Key_name == $index ) {
+ return $row;
+ }
+ }
+ return false;
+ }
+
+ function indexUnique ($table, $index, $fname = 'Database::indexUnique' ) {
+ $sql = "SELECT indexname FROM pg_indexes WHERE tablename='{$table}'".
+ " AND indexdef LIKE 'CREATE UNIQUE%({$index})'";
+ $res = $this->query( $sql, $fname );
+ if ( !$res )
+ return NULL;
+ while ($row = $this->fetchObject( $res ))
+ return true;
+ return false;
+
+ }
+
+ function fieldInfo( $table, $field ) {
+ throw new DBUnexpectedError($this, 'Database::fieldInfo() error : mysql_fetch_field() not implemented for postgre' );
+ /*
+ $res = $this->query( "SELECT * FROM '$table' LIMIT 1" );
+ $n = pg_num_fields( $res );
+ for( $i = 0; $i < $n; $i++ ) {
+ // FIXME
+ throw new DBUnexpectedError($this, "Database::fieldInfo() error : mysql_fetch_field() not implemented for postgre" );
+ $meta = mysql_fetch_field( $res, $i );
+ if( $field == $meta->name ) {
+ return $meta;
+ }
+ }
+ return false;*/
+ }
+
+ function insert( $table, $a, $fname = 'Database::insert', $options = array() ) {
+ # PostgreSQL doesn't support options
+ # We have a go at faking one of them
+ # TODO: DELAYED, LOW_PRIORITY
+
+ if ( !is_array($options))
+ $options = array($options);
+
+ if ( in_array( 'IGNORE', $options ) )
+ $oldIgnore = $this->ignoreErrors( true );
+
+ # IGNORE is performed using single-row inserts, ignoring errors in each
+ # FIXME: need some way to distiguish between key collision and other types of error
+ $oldIgnore = $this->ignoreErrors( true );
+ if ( !is_array( reset( $a ) ) ) {
+ $a = array( $a );
+ }
+ foreach ( $a as $row ) {
+ parent::insert( $table, $row, $fname, array() );
+ }
+ $this->ignoreErrors( $oldIgnore );
+ $retVal = true;
+
+ if ( in_array( 'IGNORE', $options ) )
+ $this->ignoreErrors( $oldIgnore );
+
+ return $retVal;
+ }
+
+ function tableName( $name ) {
+ # First run any transformations from the parent object
+ $name = parent::tableName( $name );
+
+ # Replace backticks into double quotes
+ $name = strtr($name,'`','"');
+
+ # Now quote PG reserved keywords
+ switch( $name ) {
+ case 'user':
+ case 'old':
+ case 'group':
+ return '"' . $name . '"';
+
+ default:
+ return $name;
+ }
+ }
+
+ function strencode( $s ) {
+ return pg_escape_string( $s );
+ }
+
+ /**
+ * Return the next in a sequence, save the value for retrieval via insertId()
+ */
+ function nextSequenceValue( $seqName ) {
+ $value = $this->selectField(''," nextval('" . $seqName . "')");
+ $this->mInsertId = $value;
+ return $value;
+ }
+
+ /**
+ * USE INDEX clause
+ * PostgreSQL doesn't have them and returns ""
+ */
+ function useIndexClause( $index ) {
+ return '';
+ }
+
+ # REPLACE query wrapper
+ # PostgreSQL simulates this with a DELETE followed by INSERT
+ # $row is the row to insert, an associative array
+ # $uniqueIndexes is an array of indexes. Each element may be either a
+ # field name or an array of field names
+ #
+ # It may be more efficient to leave off unique indexes which are unlikely to collide.
+ # However if you do this, you run the risk of encountering errors which wouldn't have
+ # occurred in MySQL
+ function replace( $table, $uniqueIndexes, $rows, $fname = 'Database::replace' ) {
+ $table = $this->tableName( $table );
+
+ if (count($rows)==0) {
+ return;
+ }
+
+ # Single row case
+ if ( !is_array( reset( $rows ) ) ) {
+ $rows = array( $rows );
+ }
+
+ foreach( $rows as $row ) {
+ # Delete rows which collide
+ if ( $uniqueIndexes ) {
+ $sql = "DELETE FROM $table WHERE ";
+ $first = true;
+ foreach ( $uniqueIndexes as $index ) {
+ if ( $first ) {
+ $first = false;
+ $sql .= "(";
+ } else {
+ $sql .= ') OR (';
+ }
+ if ( is_array( $index ) ) {
+ $first2 = true;
+ foreach ( $index as $col ) {
+ if ( $first2 ) {
+ $first2 = false;
+ } else {
+ $sql .= ' AND ';
+ }
+ $sql .= $col.'=' . $this->addQuotes( $row[$col] );
+ }
+ } else {
+ $sql .= $index.'=' . $this->addQuotes( $row[$index] );
+ }
+ }
+ $sql .= ')';
+ $this->query( $sql, $fname );
+ }
+
+ # Now insert the row
+ $sql = "INSERT INTO $table (" . $this->makeList( array_keys( $row ), LIST_NAMES ) .') VALUES (' .
+ $this->makeList( $row, LIST_COMMA ) . ')';
+ $this->query( $sql, $fname );
+ }
+ }
+
+ # DELETE where the condition is a join
+ function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = "Database::deleteJoin" ) {
+ if ( !$conds ) {
+ throw new DBUnexpectedError($this, 'Database::deleteJoin() called with empty $conds' );
+ }
+
+ $delTable = $this->tableName( $delTable );
+ $joinTable = $this->tableName( $joinTable );
+ $sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
+ if ( $conds != '*' ) {
+ $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
+ }
+ $sql .= ')';
+
+ $this->query( $sql, $fname );
+ }
+
+ # Returns the size of a text field, or -1 for "unlimited"
+ function textFieldSize( $table, $field ) {
+ $table = $this->tableName( $table );
+ $sql = "SELECT t.typname as ftype,a.atttypmod as size
+ FROM pg_class c, pg_attribute a, pg_type t
+ WHERE relname='$table' AND a.attrelid=c.oid AND
+ a.atttypid=t.oid and a.attname='$field'";
+ $res =$this->query($sql);
+ $row=$this->fetchObject($res);
+ if ($row->ftype=="varchar") {
+ $size=$row->size-4;
+ } else {
+ $size=$row->size;
+ }
+ $this->freeResult( $res );
+ return $size;
+ }
+
+ function lowPriorityOption() {
+ return '';
+ }
+
+ function limitResult($sql, $limit,$offset) {
+ return "$sql LIMIT $limit ".(is_numeric($offset)?" OFFSET {$offset} ":"");
+ }
+
+ /**
+ * Returns an SQL expression for a simple conditional.
+ * Uses CASE on PostgreSQL.
+ *
+ * @param string $cond SQL expression which will result in a boolean value
+ * @param string $trueVal SQL expression to return if true
+ * @param string $falseVal SQL expression to return if false
+ * @return string SQL fragment
+ */
+ function conditional( $cond, $trueVal, $falseVal ) {
+ return " (CASE WHEN $cond THEN $trueVal ELSE $falseVal END) ";
+ }
+
+ # FIXME: actually detecting deadlocks might be nice
+ function wasDeadlock() {
+ return false;
+ }
+
+ # Return DB-style timestamp used for MySQL schema
+ function timestamp( $ts=0 ) {
+ return wfTimestamp(TS_DB,$ts);
+ }
+
+ /**
+ * Return aggregated value function call
+ */
+ function aggregateValue ($valuedata,$valuename='value') {
+ return $valuedata;
+ }
+
+
+ function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
+ $message = "A database error has occurred\n" .
+ "Query: $sql\n" .
+ "Function: $fname\n" .
+ "Error: $errno $error\n";
+ throw new DBUnexpectedError($this, $message);
+ }
+
+ /**
+ * @return string wikitext of a link to the server software's web site
+ */
+ function getSoftwareLink() {
+ return "[http://www.postgresql.org/ PostgreSQL]";
+ }
+
+ /**
+ * @return string Version information from the database
+ */
+ function getServerVersion() {
+ $res = $this->query( "SELECT version()" );
+ $row = $this->fetchRow( $res );
+ $version = $row[0];
+ $this->freeResult( $res );
+ return $version;
+ }
+
+ function setSchema($schema=false) {
+ $schemas=$this->mSchemas;
+ if ($schema) { array_unshift($schemas,$schema); }
+ $searchpath=$this->makeList($schemas,LIST_NAMES);
+ $this->query("SET search_path = $searchpath");
+ }
+}
+
+?>
dépôts / lhc / web / wiklou.git / commitdiff