databaseoracle.php

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		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) {
		$ret = "SELECT * FROM ($sql) WHERE ROWNUM < " . ((int)$limit + (int)($offset+1));
		if (is_numeric($offset))
			$ret .= " AND ROWNUM >= " . (int)$offset;
		return $ret;
	}
	function limitResultForUpdate($sql, $limit) {
		return $sql;
	}
	/**
	 * 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 $this->strencode(wfTimestamp(TS_ORACLE, $ts));
#		return "TO_TIMESTAMP('" . $this->strencode(wfTimestamp(TS_DB, $ts)) . "', 'RRRR-MM-DD HH24:MI:SS')";
	}

	/**
	 * 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.oracle.com/ Oracle]";
	}

	/**
	 * @return string Version information from the database
	 */
	function getServerVersion() {
		return oci_server_version($this->mConn);
	}

	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");
	}

	function begin() {
	}

	function immediateCommit( $fname = 'Database::immediateCommit' ) {
		oci_commit($this->mConn);
		$this->mTrxLevel = 0;
	}
	function rollback( $fname = 'Database::rollback' ) {
		oci_rollback($this->mConn);
		$this->mTrxLevel = 0;
	}
	function getLag() {
		return false;
	}
	function getStatus($which=null) {
		$result = array('Threads_running' => 0, 'Threads_connected' => 0);
		return $result;
	}

	/**
	 * Returns an optional USE INDEX clause to go after the table, and a
	 * string to go at the end of the query
	 *
	 * @access private
	 *
	 * @param array $options an associative array of options to be turned into
	 *              an SQL query, valid keys are listed in the function.
	 * @return array
	 */
	function makeSelectOptions($options) {
		$tailOpts = '';

		if (isset( $options['ORDER BY'])) {
			$tailOpts .= " ORDER BY {$options['ORDER BY']}";
		}

		return array('', $tailOpts);
	}

	function maxListLen() {
		return 1000;
	}

	/**
	 * Query whether a given table exists
	 */
	function tableExists( $table ) {
		$table = $this->tableName($table, true);
		$res = $this->query( "SELECT COUNT(*) as NUM FROM user_tables WHERE table_name='"
			. $table . "'" );
		if (!$res)
			return false;
		$row = $this->fetchObject($res);
		$this->freeResult($res);
		return $row->num >= 1;
	}

	/**
	 * UPDATE wrapper, takes a condition array and a SET array
	 */
	function update( $table, $values, $conds, $fname = 'Database::update' ) {
		$table = $this->tableName( $table );

		$sql = "UPDATE $table SET ";
		$first = true;
		foreach ($values as $field => $v) {
			if ($first)
				$first = false;
			else
				$sql .= ", ";
			$sql .= "$field = :n$field ";
		}
		if ( $conds != '*' ) {
			$sql .= " WHERE " . $this->makeList( $conds, LIST_AND );
		}
		$stmt = $this->parseStatement($sql);
		if ($stmt === false) {
			$this->reportQueryError( $this->lastError(), $this->lastErrno(), $stmt );
			return false;
		}
		if ($this->debug())
			wfDebug("SQL: $sql\n");
		$s = '';
		foreach ($values as $field => $v) {
			oci_bind_by_name($stmt, ":n$field", $values[$field]);
			if ($this->debug())
				$s .= " [$field] = [$v]\n";
		}
		if ($this->debug())
			wfdebug(" PH: $s\n");
		$ret = $this->executeStatement($stmt);
		return $ret;
	}

	/**
	 * INSERT wrapper, inserts an array into a table
	 *
	 * $a may be a single associative array, or an array of these with numeric keys, for
	 * multi-row insert.
	 *
	 * Usually aborts on failure
	 * If errors are explicitly ignored, returns success
	 */
	function insert( $table, $a, $fname = 'Database::insert', $options = array() ) {
		# No rows to insert, easy just return now
		if ( !count( $a ) ) {
			return true;
		}

		$table = $this->tableName( $table );
		if (!is_array($options))
			$options = array($options);

		$oldIgnore = false;
		if (in_array('IGNORE', $options))
			$oldIgnore = $this->ignoreErrors( true );

		if ( isset( $a[0] ) && is_array( $a[0] ) ) {
			$multi = true;
			$keys = array_keys( $a[0] );
		} else {
			$multi = false;
			$keys = array_keys( $a );
		}

		$sql = "INSERT INTO $table (" . implode( ',', $keys ) . ') VALUES (';
		$return = '';
		$first = true;
		foreach ($a as $key => $value) {
			if ($first)
				$first = false;
			else
				$sql .= ", ";
			if (is_object($value) && $value->isLOB()) {
				$sql .= "EMPTY_BLOB()";
				$return = "RETURNING $key INTO :bobj";
			} else
				$sql .= ":$key";
		}
		$sql .= ") $return";

		if ($this->debug()) {
			wfDebug("SQL: $sql\n");
		}

		if (($stmt = $this->parseStatement($sql)) === false) {
			$this->reportQueryError($this->lastError(), $this->lastErrno(), $sql, $fname);
			$this->ignoreErrors($oldIgnore);
			return false;
		}

		/*
		 * If we're inserting multiple rows, parse the statement once and
		 * execute it for each set of values.  Otherwise, convert it into an
		 * array and pretend.
		 */
		if (!$multi)
			$a = array($a);

		foreach ($a as $key => $row) {
			$blob = false;
			$bdata = false;
			$s = '';
			foreach ($row as $k => $value) {
				if (is_object($value) && $value->isLOB()) {
					$blob = oci_new_descriptor($this->mConn, OCI_D_LOB);
					$bdata = $value->data();
					oci_bind_by_name($stmt, ":bobj", $blob, -1, OCI_B_BLOB);
				} else
					oci_bind_by_name($stmt, ":$k", $a[$key][$k], -1);
				if ($this->debug())
					$s .= " [$k] = {$row[$k]}";
			}
			if ($this->debug())
				wfDebug(" PH: $s\n");
			if (($s = $this->executeStatement($stmt)) === false) {
				$this->reportQueryError($this->lastError(), $this->lastErrno(), $sql, $fname);
				$this->ignoreErrors($oldIgnore);
				return false;
			}

			if ($blob) {
				$blob->save($bdata);
			}
		}
		$this->ignoreErrors($oldIgnore);
		return $this->mLastResult = $s;
	}

	function ping() {
		return true;
	}

	function encodeBlob($b) {
		return new OracleBlob($b);
	}
}

?>