Fast number of rows with big tables in PostgreSQL (thanks to juzna)

adminer/drivers/mssql.inc.php

@@ -490,6 +490,10 @@ WHERE OBJECT_NAME(i.object_id) = " . q($table)
 		return $return;
 	}
 	
+	function found_rows($table_status, $where) {
+		return false;
+	}
+	
 	function foreign_keys($table) {
 		$return = array();
 		foreach (get_rows("EXEC sp_fkeys @fktable_name = " . q($table)) as $row) {

adminer/drivers/mysql.inc.php

@@ -822,6 +822,15 @@ if (!defined("DRIVER")) {
 		return $connection->query("EXPLAIN $query");
 	}
 	
+	/** Get approximate number of rows
+	* @param array
+	* @param array
+	* @return int or null if approximate number can't be retrieved
+	*/
+	function found_rows($table_status, $where) {
+		return ($where || $table_status["Engine"] != "InnoDB" ? null : $table_status["Rows"]);
+	}
+	
 	/** Get user defined types
 	* @return array
 	*/

adminer/drivers/oracle.inc.php

@@ -275,6 +275,10 @@ ORDER BY uc.constraint_type, uic.column_position", $connection2) as $row) {
 		return $connection->query("SELECT * FROM plan_table");
 	}
 	
+	function found_rows($table_status, $where) {
+		return false;
+	}
+	
 	function alter_table($table, $name, $fields, $foreign, $comment, $engine, $collation, $auto_increment, $partitioning) {
 		$alter = $drop = array();
 		foreach ($fields as $field) {

adminer/drivers/pgsql.inc.php

@@ -511,6 +511,18 @@ ORDER BY p.proname');
 		return $connection->query("EXPLAIN $query");
 	}
 	
+	function found_rows($table_status, $where) {
+		global $connection;
+		if (ereg(
+			" rows=([0-9]+)",
+			$connection->result("EXPLAIN SELECT * FROM " . idf_escape($table_status["Name"]) . ($where ? " WHERE " . implode(" AND ", $where) : "")),
+			$regs
+		)) {
+			return $regs[1];
+		}
+		return false;
+	}
+	
 	function types() {
 		return get_vals("SELECT typname
 FROM pg_type

adminer/drivers/sqlite.inc.php

@@ -503,6 +503,10 @@ if (isset($_GET["sqlite"]) || isset($_GET["sqlite2"])) {
 		return $connection->query("EXPLAIN $query");
 	}
 	
+	function found_rows($table_status, $where) {
+		return false;
+	}
+	
 	function types() {
 		return array();
 	}