* than MySQL ones, some of them should be moved to parent
* Database class.
*
+ * @addtogroup Database
*/
-
class PostgresField {
private $name, $tablename, $type, $nullable, $max_length;
}
}
+/**
+ * @addtogroup Database
+ */
class DatabasePostgres extends Database {
var $mInsertId = NULL;
var $mLastResult = NULL;
## If this is the initial connection, setup the schema stuff and possibly create the user
if (defined('MEDIAWIKI_INSTALL')) {
global $wgDBname, $wgDBuser, $wgDBpassword, $wgDBsuperuser, $wgDBmwschema,
- $wgDBts2schema, $wgDBtimezone;
+ $wgDBts2schema;
print "<li>Checking the version of Postgres...";
$version = $this->getServerVersion();
}
print "version $this->numeric_version is OK.</li>\n";
- print "<li>Figuring out timezone the database is using...";
- ## Figure out what the local timezone is for this database
- $wgDBtimezone = 99;
- if ($this->doQuery("SET datestyle TO ISO")) {
- $res = $this->doQuery("SELECT substring(now() FROM E'-?\\\d\\\d\$')::int");
- if ($res) {
- $wgDBtimezone = pg_fetch_result($res,0,0);
- print "timezone is '$wgDBtimezone'</li>\n";
- }
- }
- if ($wgDBtimezone === 99) {
- print "<b>UNKNOWN</b>. Defaulting to '0'</li>\n";
- }
-
$safeuser = $this->quote_ident($wgDBuser);
## Are we connecting as a superuser for the first time?
if ($wgDBsuperuser) {
"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);
# 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 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( $options );
- if ( !is_array($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 ( in_array( 'IGNORE', $options ) )
- $oldIgnore = $this->ignoreErrors( true );
+ $ignore = in_array( 'IGNORE', $options ) ? 1 : 0;
+ if ( $ignore )
+ $olde = error_reporting( 0 );
- # 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 );
+ $sql = "INSERT INTO $table (" . implode( ',', $keys ) . ') VALUES ';
+
+ if ( $multi ) {
+ if ( $wgDBversion >= 8.1 ) {
+ $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 );
}
- $this->ignoreErrors( $oldIgnore );
- $retVal = true;
- if ( in_array( 'IGNORE', $options ) )
- $this->ignoreErrors( $oldIgnore );
+ if ( $ignore ) {
+ $olde = error_reporting( $olde );
+ return true;
+ }
+
+ return $res;
- return $retVal;
}
function tableName( $name ) {
$count = $res ? pg_num_rows($res) : 0;
if ($res)
$this->freeResult( $res );
- return $count;
+ return $count ? true : false;
}
/*
}
function triggerExists($table, $trigger) {
- global $wgDBmwschema;
+ global $wgDBmwschema;
$q = <<<END
SELECT 1 FROM pg_class, pg_namespace, pg_trigger
$this->addQuotes($wgDBmwschema),
$this->addQuotes($table),
$this->addQuotes($trigger)));
- $row = $this->fetchRow($res);
- $exists = !!$row;
+ if (!$res)
+ return NULL;
+ $rows = pg_num_rows($res);
$this->freeResult($res);
- return $exists;
+ return $rows;
}
function ruleExists($table, $rule) {
- global $wgDBmwschema;
+ global $wgDBmwschema;
$exists = $this->selectField("pg_rules", "rulename",
array( "rulename" => $rule,
"tablename" => $table,
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;
+ $rows = pg_num_rows($res);
+ $this->freeResult($res);
+ return $rows;
+ }
+
/**
* Query whether a given schema exists. Returns the name of the owner
*/
$this->doQuery("DROP TABLE $wgDBmwschema.$ctest");
}
$SQL = "CREATE TABLE $wgDBmwschema.$ctest(a int)";
- error_reporting( 0 );
+ $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";
dieout("</ul>");
$this->doQuery("COMMIT");
}
- function encodeBlob($b) {
+ function encodeBlob( $b ) {
return array('bytea',pg_escape_bytea($b));
}
- function decodeBlob($b) {
+ function decodeBlob( $b ) {
return pg_unescape_bytea( $b );
}
}
/**
- * 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['HAVING'] ) ) $preLimitTail .= " HAVING {$options['HAVING']}";
if ( isset( $options['ORDER BY'] ) ) $preLimitTail .= " ORDER BY " . $options['ORDER BY'];
//if (isset($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 = '';
- }
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?
+ *
+ * @return int
+ */
+ public function getLag() {
+ # Not implemented for PostgreSQL
+ return 0;
+ }
} // end DatabasePostgres class
dépôts / lhc / web / wiklou.git / blobdiff