* than MySQL ones, some of them should be moved to parent
* Database class.
*
+ * @addtogroup Database
*/
+class PostgresField {
+ private $name, $tablename, $type, $nullable, $max_length;
+
+ static function fromText($db, $table, $field) {
+ global $wgDBmwschema;
+
+ $q = <<<END
+SELECT
+CASE WHEN typname = 'int2' THEN 'smallint'
+WHEN typname = 'int4' THEN 'integer'
+WHEN typname = 'int8' THEN 'bigint'
+WHEN typname = 'bpchar' THEN 'char'
+ELSE typname END AS typname,
+attnotnull, attlen
+FROM pg_class, pg_namespace, pg_attribute, pg_type
+WHERE relnamespace=pg_namespace.oid
+AND relkind='r'
+AND attrelid=pg_class.oid
+AND atttypid=pg_type.oid
+AND nspname=%s
+AND relname=%s
+AND attname=%s;
+END;
+ $res = $db->query(sprintf($q,
+ $db->addQuotes($wgDBmwschema),
+ $db->addQuotes($table),
+ $db->addQuotes($field)));
+ $row = $db->fetchObject($res);
+ if (!$row)
+ return null;
+ $n = new PostgresField;
+ $n->type = $row->typname;
+ $n->nullable = ($row->attnotnull == 'f');
+ $n->name = $field;
+ $n->tablename = $table;
+ $n->max_length = $row->attlen;
+ return $n;
+ }
+
+ function name() {
+ return $this->name;
+ }
+
+ function tableName() {
+ return $this->tablename;
+ }
+
+ function type() {
+ return $this->type;
+ }
+
+ function nullable() {
+ return $this->nullable;
+ }
+ function maxLength() {
+ return $this->max_length;
+ }
+}
+
+/**
+ * @addtogroup Database
+ */
class DatabasePostgres extends Database {
var $mInsertId = NULL;
var $mLastResult = NULL;
}
$this->mOut =& $wgOut;
$this->mFailFunction = $failFunction;
- $this->mCascadingDeletes = true;
- $this->mCleanupTriggers = true;
- $this->mStrictIPs = true;
$this->mFlags = $flags;
$this->open( $server, $user, $password, $dbName);
}
+ function cascadingDeletes() {
+ return true;
+ }
+ function cleanupTriggers() {
+ return true;
+ }
+ function strictIPs() {
+ return true;
+ }
function realTimestamps() {
return true;
}
-
function implicitGroupby() {
return false;
}
-
+ function implicitOrderby() {
+ return false;
+ }
function searchableIPs() {
return true;
}
+ function functionalIndexes() {
+ return true;
+ }
- static function newFromParams( $server = false, $user = false, $password = false, $dbName = false,
- $failFunction = false, $flags = 0)
+ function hasConstraint( $name ) {
+ $SQL = "SELECT 1 FROM pg_catalog.pg_constraint WHERE conname = '" . pg_escape_string( $name ) . "'";
+ return $this->numRows($res = $this->doQuery($SQL));
+ }
+
+ static function newFromParams( $server, $user, $password, $dbName, $failFunction = false, $flags = 0)
{
return new DatabasePostgres( $server, $user, $password, $dbName, $failFunction, $flags );
}
throw new DBConnectionError( $this, "Postgres functions missing, have you compiled PHP with the --with-pgsql option?\n (Note: if you recently installed PHP, you may need to restart your webserver and database)\n" );
}
-
global $wgDBport;
+ if (!strlen($user)) { ## e.g. the class is being loaded
+ return;
+ }
+
$this->close();
$this->mServer = $server;
$port = $wgDBport;
$hstring .= "port=$port ";
}
- if (!strlen($user)) { ## e.g. the class is being loaded
- return;
- }
error_reporting( E_ALL );
@$this->mConn = pg_connect("$hstring dbname=$dbName user=$user password=$password");
$this->mOpened = true;
## If this is the initial connection, setup the schema stuff and possibly create the user
+ ## TODO: Move this out of open()
if (defined('MEDIAWIKI_INSTALL')) {
global $wgDBname, $wgDBuser, $wgDBpassword, $wgDBsuperuser, $wgDBmwschema,
$wgDBts2schema;
$wgDBsuperuser = '';
return true; ## Reconnect as regular user
- }
+
+ } ## end superuser
if (!defined('POSTGRES_SEARCHPATH')) {
"WHERE relname = 'pg_pltemplate' AND nspname='pg_catalog'";
$rows = $this->numRows($this->doQuery($SQL));
if ($rows >= 1) {
+ $olde = error_reporting(0);
+ error_reporting($olde - E_WARNING);
$result = $this->doQuery("CREATE LANGUAGE plpgsql");
+ error_reporting($olde);
if (!$result) {
print "<b>FAILED</b>. You need to install the language plpgsql in the database <tt>$wgDBname</tt></li>";
dieout("</ul>");
print "<li>Schema \"$wgDBmwschema\" exists and is owned by \"$user\". Excellent.</li>\n";
}
+ ## Always return GMT time to accomodate the existing integer-based timestamp assumption
+ print "<li>Setting the timezone to GMT for user \"$user\" ...";
+ $SQL = "ALTER USER $safeuser SET timezone = 'GMT'";
+ $result = pg_query($this->mConn, $SQL);
+ if (!$result) {
+ print "<b>FAILED</b>.</li>\n";
+ dieout("</ul>");
+ }
+ print "OK</li>\n";
+ ## Set for the rest of this session
+ $SQL = "SET timezone = 'GMT'";
+ $result = pg_query($this->mConn, $SQL);
+ if (!$result) {
+ print "<li>Failed to set timezone</li>\n";
+ dieout("</ul>");
+ }
+
+ print "<li>Setting the datestyle to ISO, YMD for user \"$user\" ...";
+ $SQL = "ALTER USER $safeuser SET datestyle = 'ISO, YMD'";
+ $result = pg_query($this->mConn, $SQL);
+ if (!$result) {
+ print "<b>FAILED</b>.</li>\n";
+ dieout("</ul>");
+ }
+ print "OK</li>\n";
+ ## Set for the rest of this session
+ $SQL = "SET datestyle = 'ISO, YMD'";
+ $result = pg_query($this->mConn, $SQL);
+ if (!$result) {
+ print "<li>Failed to set datestyle</li>\n";
+ dieout("</ul>");
+ }
+
## Fix up the search paths if needed
print "<li>Setting the search path for user \"$user\" ...";
$path = $this->quote_ident($wgDBmwschema);
$this->doQuery("SET client_min_messages = 'ERROR'");
}
+ global $wgDBmwschema, $wgDBts2schema;
+ if (isset( $wgDBmwschema ) && isset( $wgDBts2schema )
+ && $wgDBmwschema !== 'mediawiki'
+ && preg_match( '/^\w+$/', $wgDBmwschema )
+ && preg_match( '/^\w+$/', $wgDBts2schema )
+ ) {
+ $this->doQuery("SET search_path = $wgDBmwschema, $wgDBts2schema, public");
+ }
+
return $this->mConn;
}
}
function doQuery( $sql ) {
+ if (function_exists('mb_convert_encoding')) {
+ return $this->mLastResult=pg_query( $this->mConn , mb_convert_encoding($sql,'UTF-8') );
+ }
return $this->mLastResult=pg_query( $this->mConn , $sql);
}
}
function freeResult( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
if ( !@pg_free_result( $res ) ) {
throw new DBUnexpectedError($this, "Unable to free Postgres result\n" );
}
}
function fetchObject( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
@$row = pg_fetch_object( $res );
# FIXME: HACK HACK HACK HACK debug
# TODO:
# hashar : not sure if the following test really trigger if the object
- # fetching failled.
+ # fetching failed.
if( pg_last_error($this->mConn) ) {
throw new DBUnexpectedError($this, 'SQL error: ' . htmlspecialchars( pg_last_error($this->mConn) ) );
}
}
function fetchRow( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
@$row = pg_fetch_array( $res );
if( pg_last_error($this->mConn) ) {
throw new DBUnexpectedError($this, 'SQL error: ' . htmlspecialchars( pg_last_error($this->mConn) ) );
}
function numRows( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
@$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 ); }
+ function numFields( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
+ return pg_num_fields( $res );
+ }
+ function fieldName( $res, $n ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
+ return pg_field_name( $res, $n );
+ }
/**
* This must be called after nextSequenceVal
return $this->mInsertId;
}
- function dataSeek( $res, $row ) { return pg_result_seek( $res, $row ); }
+ function dataSeek( $res, $row ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
+ return pg_result_seek( $res, $row );
+ }
+
function lastError() {
if ( $this->mConn ) {
return pg_last_error();
}
function affectedRows() {
+ if( !isset( $this->mLastResult ) or ! $this->mLastResult )
+ return 0;
+
return pg_affected_rows( $this->mLastResult );
}
+ /**
+ * Estimate rows in dataset
+ * Returns estimated count, based on EXPLAIN output
+ * This is not necessarily an accurate estimate, so use sparingly
+ * Returns -1 if count cannot be found
+ * Takes same arguments as Database::select()
+ */
+
+ function estimateRowCount( $table, $vars='*', $conds='', $fname = 'Database::estimateRowCount', $options = array() ) {
+ $options['EXPLAIN'] = true;
+ $res = $this->select( $table, $vars, $conds, $fname, $options );
+ $rows = -1;
+ if ( $res ) {
+ $row = $this->fetchRow( $res );
+ $count = array();
+ if( preg_match( '/rows=(\d+)/', $row[0], $count ) ) {
+ $rows = $count[1];
+ }
+ $this->freeResult($res);
+ }
+ return $rows;
+ }
+
+
/**
* Returns information about an index
* If errors are explicitly ignored, returns NULL on failure
if ( !$res ) {
return NULL;
}
-
while ( $row = $this->fetchObject( $res ) ) {
if ( $row->indexname == $index ) {
return $row;
-
- // BUG: !!!! This code needs to be synced up with database.php
-
}
}
return false;
}
- function insert( $table, $a, $fname = 'Database::insert', $options = array() ) {
- # Postgres doesn't support options
- # We have a go at faking one of them
- # TODO: DELAYED, LOW_PRIORITY
+ /**
+ * INSERT wrapper, inserts an array into a table
+ *
+ * $args may be a single associative array, or an array of these with numeric keys,
+ * for multi-row insert (Postgres version 8.2 and above only).
+ *
+ * @param array $table String: Name of the table to insert to.
+ * @param array $args Array: Items to insert into the table.
+ * @param array $fname String: Name of the function, for profiling
+ * @param mixed $options String or Array. Valid options: IGNORE
+ *
+ * @return bool Success of insert operation. IGNORE always returns true.
+ */
+ function insert( $table, $args, $fname = 'DatabasePostgres::insert', $options = array() ) {
+ global $wgDBversion;
+
+ $table = $this->tableName( $table );
+ if (! isset( $wgDBversion ) ) {
+ $this->getServerVersion();
+ $wgDBversion = $this->numeric_version;
+ }
+
+ if ( !is_array( $options ) )
+ $options = array( $options );
+
+ if ( isset( $args[0] ) && is_array( $args[0] ) ) {
+ $multi = true;
+ $keys = array_keys( $args[0] );
+ }
+ else {
+ $multi = false;
+ $keys = array_keys( $args );
+ }
- if ( !is_array($options))
- $options = array($options);
+ $ignore = in_array( 'IGNORE', $options ) ? 1 : 0;
+ if ( $ignore )
+ $olde = error_reporting( 0 );
- if ( in_array( 'IGNORE', $options ) )
- $oldIgnore = $this->ignoreErrors( true );
+ $sql = "INSERT INTO $table (" . implode( ',', $keys ) . ') VALUES ';
- # 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 );
+ if ( $multi ) {
+ if ( $wgDBversion >= 8.2 ) {
+ $first = true;
+ foreach ( $args as $row ) {
+ if ( $first ) {
+ $first = false;
+ } else {
+ $sql .= ',';
+ }
+ $sql .= '(' . $this->makeList( $row ) . ')';
+ }
+ $res = (bool)$this->query( $sql, $fname, $ignore );
+ }
+ else {
+ $res = true;
+ $origsql = $sql;
+ foreach ( $args as $row ) {
+ $tempsql = $origsql;
+ $tempsql .= '(' . $this->makeList( $row ) . ')';
+ $tempres = (bool)$this->query( $tempsql, $fname, $ignore );
+ if (! $tempres)
+ $res = false;
+ }
+ }
}
- foreach ( $a as $row ) {
- parent::insert( $table, $row, $fname, array() );
+ else {
+ $sql .= '(' . $this->makeList( $args ) . ')';
+ $res = (bool)$this->query( $sql, $fname, $ignore );
+ }
+
+ if ( $ignore ) {
+ $olde = error_reporting( $olde );
+ return true;
}
- $this->ignoreErrors( $oldIgnore );
- $retVal = true;
- if ( in_array( 'IGNORE', $options ) )
- $this->ignoreErrors( $oldIgnore );
+ return $res;
- return $retVal;
}
function tableName( $name ) {
return '';
}
- function limitResult($sql, $limit,$offset) {
+ function limitResult($sql, $limit,$offset=false) {
return "$sql LIMIT $limit ".(is_numeric($offset)?" OFFSET {$offset} ":"");
}
/**
- * Query whether a given table exists (in the given schema, or the default mw one if not given)
+ * Query whether a given relation exists (in the given schema, or the
+ * default mw one if not given)
*/
- function tableExists( $table, $schema = false ) {
+ function relationExists( $table, $types, $schema = false ) {
global $wgDBmwschema;
+ if (!is_array($types))
+ $types = array($types);
if (! $schema )
$schema = $wgDBmwschema;
- $etable = preg_replace("/'/", "''", $table);
- $eschema = preg_replace("/'/", "''", $schema);
+ $etable = $this->addQuotes($table);
+ $eschema = $this->addQuotes($schema);
$SQL = "SELECT 1 FROM pg_catalog.pg_class c, pg_catalog.pg_namespace n "
- . "WHERE c.relnamespace = n.oid AND c.relname = '$etable' AND n.nspname = '$eschema' "
- . "AND c.relkind IN ('r','v')";
+ . "WHERE c.relnamespace = n.oid AND c.relname = $etable AND n.nspname = $eschema "
+ . "AND c.relkind IN ('" . implode("','", $types) . "')";
$res = $this->query( $SQL );
- $count = $res ? pg_num_rows($res) : 0;
+ $count = $res ? $res->numRows() : 0;
if ($res)
$this->freeResult( $res );
- return $count;
+ return $count ? true : false;
+ }
+
+ /*
+ * For backward compatibility, this function checks both tables and
+ * views.
+ */
+ function tableExists ($table, $schema = false) {
+ return $this->relationExists($table, array('r', 'v'), $schema);
+ }
+
+ function sequenceExists ($sequence, $schema = false) {
+ return $this->relationExists($sequence, 'S', $schema);
}
+ function triggerExists($table, $trigger) {
+ global $wgDBmwschema;
+
+ $q = <<<END
+ SELECT 1 FROM pg_class, pg_namespace, pg_trigger
+ WHERE relnamespace=pg_namespace.oid AND relkind='r'
+ AND tgrelid=pg_class.oid
+ AND nspname=%s AND relname=%s AND tgname=%s
+END;
+ $res = $this->query(sprintf($q,
+ $this->addQuotes($wgDBmwschema),
+ $this->addQuotes($table),
+ $this->addQuotes($trigger)));
+ if (!$res)
+ return NULL;
+ $rows = $res->numRows();
+ $this->freeResult($res);
+ return $rows;
+ }
+
+ function ruleExists($table, $rule) {
+ global $wgDBmwschema;
+ $exists = $this->selectField("pg_rules", "rulename",
+ array( "rulename" => $rule,
+ "tablename" => $table,
+ "schemaname" => $wgDBmwschema));
+ return $exists === $rule;
+ }
+
+ function constraintExists($table, $constraint) {
+ global $wgDBmwschema;
+ $SQL = sprintf("SELECT 1 FROM information_schema.table_constraints ".
+ "WHERE constraint_schema = %s AND table_name = %s AND constraint_name = %s",
+ $this->addQuotes($wgDBmwschema),
+ $this->addQuotes($table),
+ $this->addQuotes($constraint));
+ $res = $this->query($SQL);
+ if (!$res)
+ return NULL;
+ $rows = $res->numRows();
+ $this->freeResult($res);
+ return $rows;
+ }
/**
* Query whether a given schema exists. Returns the name of the owner
$SQL = "SELECT rolname FROM pg_catalog.pg_namespace n, pg_catalog.pg_roles r "
."WHERE n.nspowner=r.oid AND n.nspname = '$eschema'";
$res = $this->query( $SQL );
- $owner = $res ? pg_num_rows($res) ? pg_fetch_result($res, 0, 0) : false : false;
+ if ( $res && $res->numRows() ) {
+ $row = $res->fetchObject();
+ $owner = $row->rolname;
+ } else {
+ $owner = false;
+ }
if ($res)
$this->freeResult($res);
return $owner;
/**
* Query whether a given column exists in the mediawiki schema
*/
- function fieldExists( $table, $field ) {
+ function fieldExists( $table, $field, $fname = 'DatabasePostgres::fieldExists' ) {
global $wgDBmwschema;
$etable = preg_replace("/'/", "''", $table);
$eschema = preg_replace("/'/", "''", $wgDBmwschema);
$SQL = "SELECT 1 FROM pg_catalog.pg_class c, pg_catalog.pg_namespace n, pg_catalog.pg_attribute a "
. "WHERE c.relnamespace = n.oid AND c.relname = '$etable' AND n.nspname = '$eschema' "
. "AND a.attrelid = c.oid AND a.attname = '$ecol'";
- $res = $this->query( $SQL );
- $count = $res ? pg_num_rows($res) : 0;
+ $res = $this->query( $SQL, $fname );
+ $count = $res ? $res->numRows() : 0;
if ($res)
$this->freeResult( $res );
return $count;
}
function fieldInfo( $table, $field ) {
- $res = $this->query( "SELECT $field FROM $table LIMIT 1" );
- $type = pg_field_type( $res, 0 );
- return $type;
+ return PostgresField::fromText($this, $table, $field);
}
- function begin( $fname = 'DatabasePostgrs::begin' ) {
+ function begin( $fname = 'DatabasePostgres::begin' ) {
$this->query( 'BEGIN', $fname );
$this->mTrxLevel = 1;
}
## Make sure that we can write to the correct schema
## If not, Postgres will happily and silently go to the next search_path item
- $SQL = "CREATE TABLE $wgDBmwschema.mw_test_table(a int)";
- error_reporting( 0 );
+ $ctest = "mw_test_table";
+ if ($this->tableExists($ctest, $wgDBmwschema)) {
+ $this->doQuery("DROP TABLE $wgDBmwschema.$ctest");
+ }
+ $SQL = "CREATE TABLE $wgDBmwschema.$ctest(a int)";
+ $olde = error_reporting( 0 );
$res = $this->doQuery($SQL);
- error_reporting( E_ALL );
+ error_reporting( $olde );
if (!$res) {
- print "<b>FAILED</b>. Make sure that the user \"$wgDBuser\" can write to the schema \"wgDBmwschema\"</li>\n";
+ print "<b>FAILED</b>. Make sure that the user \"$wgDBuser\" can write to the schema \"$wgDBmwschema\"</li>\n";
dieout("</ul>");
}
+ $this->doQuery("DROP TABLE $wgDBmwschema.mw_test_table");
dbsource( "../maintenance/postgres/tables.sql", $this);
$this->query("$SQL $matches[1],$matches[2])");
}
print " (table interwiki successfully populated)...\n";
+
+ $this->doQuery("COMMIT");
}
- function encodeBlob($b) {
- return array('bytea',pg_escape_bytea($b));
+ function encodeBlob( $b ) {
+ return new Blob ( pg_escape_bytea( $b ) ) ;
}
- function decodeBlob($b) {
+
+ function decodeBlob( $b ) {
+ if ($b instanceof Blob) {
+ $b = $b->fetch();
+ }
return pg_unescape_bytea( $b );
}
function addQuotes( $s ) {
if ( is_null( $s ) ) {
return 'NULL';
- } else if (is_array( $s )) { ## Assume it is bytea data
- return "E'$s[1]'";
+ } else if ($s instanceof Blob) {
+ return "'".$s->fetch($s)."'";
}
return "'" . pg_escape_string($s) . "'";
- // Unreachable: return "E'" . pg_escape_string($s) . "'";
}
function quote_ident( $s ) {
}
/**
- * Returns an optional USE INDEX clause to go after the table, and a
- * string to go at the end of the query
+ * Various select options
*
* @private
*
*/
function makeSelectOptions( $options ) {
$preLimitTail = $postLimitTail = '';
- $startOpts = '';
+ $startOpts = $useIndex = '';
$noKeyOptions = array();
foreach ( $options as $key => $option ) {
}
}
- if ( isset( $options['GROUP BY'] ) ) $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
- if ( isset( $options['ORDER BY'] ) ) $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
+ if ( isset( $options['GROUP BY'] ) ) $preLimitTail .= " GROUP BY " . $options['GROUP BY'];
+ if ( isset( $options['HAVING'] ) ) $preLimitTail .= " HAVING {$options['HAVING']}";
+ if ( isset( $options['ORDER BY'] ) ) $preLimitTail .= " ORDER BY " . $options['ORDER BY'];
//if (isset($options['LIMIT'])) {
// $tailOpts .= $this->limitResult('', $options['LIMIT'],
if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $postLimitTail .= ' FOR UPDATE';
if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $postLimitTail .= ' LOCK IN SHARE MODE';
- if ( isset( $noKeyOptions['DISTINCT'] ) && isset( $noKeyOptions['DISTINCTROW'] ) ) $startOpts .= 'DISTINCT';
-
- if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
- $useIndex = $this->useIndexClause( $options['USE INDEX'] );
- } else {
- $useIndex = '';
- }
+ if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) $startOpts .= 'DISTINCT';
return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
}
public function setTimeout( $timeout ) {
- /// @fixme no-op
+ // @todo fixme no-op
}
function ping() {
wfDebug( "Function ping() not written for DatabasePostgres.php yet");
return true;
}
+
+ /**
+ * How lagged is this slave?
+ *
+ */
+ public function getLag() {
+ # Not implemented for PostgreSQL
+ return false;
+ }
+ function buildConcat( $stringList ) {
+ return implode( ' || ', $stringList );
+ }
} // end DatabasePostgres class
-?>
+
dépôts / lhc / web / wiklou.git / blobdiff