Add more system tables help links

adminer/drivers/mysql.inc.php

@@ -314,6 +314,15 @@ if (!defined("DRIVER")) {
 			}
 		}
 
+		function tableHelp($name) {
+			if (information_schema(DB)) {
+				return strtolower(str_replace("_", "-", $name)) . "-table.html";
+			}
+			if (DB == "mysql") {
+				return "system-database.html"; //! more precise link
+			}
+		}
+
 	}
 
 

adminer/drivers/pgsql.inc.php

@@ -216,6 +216,17 @@ if (isset($_GET["pgsql"])) {
 			return $this->_conn->warnings();
 		}
 
+		function tableHelp($name) {
+			$links = array(
+				"information_schema" => "infoschema",
+				"pg_catalog" => "catalog",
+			);
+			$link = $links[$_GET["ns"]];
+			if ($link) {
+				return "$link-" . str_replace("_", "-", $name) . ".html";
+			}
+		}
+
 	}
 
 

adminer/drivers/sqlite.inc.php

@@ -218,6 +218,15 @@ if (isset($_GET["sqlite"]) || isset($_GET["sqlite2"])) {
 			return queries("REPLACE INTO " . table($table) . " (" . implode(", ", array_keys(reset($rows))) . ") VALUES\n" . implode(",\n", $values));
 		}
 
+		function tableHelp($name) {
+			if ($name == "sqlite_sequence") {
+				return "fileformat2.html#seqtab";
+			}
+			if ($name == "sqlite_master") {
+				return "fileformat2.html#$name";
+			}
+		}
+
 	}
 
 

adminer/include/adminer.inc.php

@@ -160,6 +160,7 @@ class Adminer {
 	* @return null
 	*/
 	function selectLinks($tableStatus, $set = "") {
+		global $jush, $driver;
 		echo '<p class="links">';
 		$links = array("select" => lang('Select data'));
 		if (support("table") || support("indexes")) {
@@ -175,9 +176,11 @@ class Adminer {
 		if ($set !== null) {
 			$links["edit"] = lang('New item');
 		}
+		$name = $tableStatus["Name"];
 		foreach ($links as $key => $val) {
-			echo " <a href='" . h(ME) . "$key=" . urlencode($tableStatus["Name"]) . ($key == "edit" ? $set : "") . "'" . bold(isset($_GET[$key])) . ">$val</a>";
+			echo " <a href='" . h(ME) . "$key=" . urlencode($name) . ($key == "edit" ? $set : "") . "'" . bold(isset($_GET[$key])) . ">$val</a>";
 		}
+		echo doc_link(array($jush => $driver->tableHelp($name)), "?");
 		echo "\n";
 	}
 

adminer/include/driver.inc.php

@@ -147,4 +147,11 @@
 		return '';
 	}
 	
+	/** Get help link for table
+	* @param string
+	* @return string relative URL or null
+	*/
+	function tableHelp($name) {
+	}
+	
 }

adminer/include/editing.inc.php

@@ -483,9 +483,10 @@ function ini_bytes($ini) {
 
 /** Create link to database documentation
 * @param array $jush => $path
+* @param string HTML code
 * @return string HTML code
 */
-function doc_link($paths) {
+function doc_link($paths, $text = "<sup>?</sup>") {
 	global $jush, $connection;
 	$version = preg_replace('~^(\\d\\.?\\d).*~s', '\\1', $connection->server_info);
 	$urls = array(
@@ -495,7 +496,7 @@ function doc_link($paths) {
 		'mssql' => "https://msdn.microsoft.com/library/",
 		'oracle' => "https://download.oracle.com/docs/cd/B19306_01/server.102/b14200/",
 	);
-	return ($paths[$jush] ? "<a href='$urls[$jush]$paths[$jush]'" . target_blank() . "><sup>?</sup></a>" : "");
+	return ($paths[$jush] ? "<a href='$urls[$jush]$paths[$jush]'" . target_blank() . ">$text</a>" : "");
 }
 
 /** Wrap gzencode() for usage in ob_start()

changes.txt

@@ -1,6 +1,7 @@
 Adminer 4.6.1-dev:
 Speed up rendering of long tables (regression from 4.4.0)
 Sticky position of table actions
+Add system tables help links
 MySQL: Support non-utf8 charset in search in column
 MySQL: Support geometry in MySQL 8 (bug #574)
 SQLite: Allow deleting PRIMARY KEY from tables with auto increment