Fix - #15205 - Useless backquotes, sql preview, delete index

Signed-off-by: Saurabh Srivastava <saurabhsrivastava312@gmail.com>

js/functions.js

@@ -2407,6 +2407,52 @@ function PMA_previewSQL ($form) {
     });
 }
 
+/**
+ *
+ * @param sql_data  Sql query to preview
+ * @param url       url to be sent to callback
+ * @param callback  callback function
+ *
+ * @return void
+ */
+function PMA_confirmPreviewSQL (sql_data, url, callback) {
+    var $dialog_content = $('<div class="preview_sql"><code class="sql"><pre>'
+        + sql_data
+        + '</pre></code></div>'
+    );
+    var button_options = {};
+    var button_options = [
+        {
+            text: PMA_messages.strOK,
+            'class': 'submitOK',
+            click: function () {
+                callback(url);
+            }
+        },
+        {
+            text: PMA_messages.strCancel,
+            'class': 'submitCancel',
+            click: function () {
+                $(this).dialog('close');
+            }
+        }
+    ];
+    var $response_dialog = $dialog_content.dialog({
+        minWidth: 550,
+        maxHeight: 400,
+        modal: true,
+        buttons: button_options,
+        title: PMA_messages.strPreviewSQL,
+        close: function () {
+            $(this).remove();
+        },
+        open: function () {
+            // Pretty SQL printing.
+            PMA_highlightSQL($(this));
+        }
+    });
+}
+
 /**
  * check for reserved keyword column name
  *

js/indexes.js

@@ -599,7 +599,7 @@ AJAX.registerOnload('indexes.js', function () {
                 .val()
         );
 
-        $anchor.PMA_confirm(question, $anchor.attr('href'), function (url) {
+        PMA_confirmPreviewSQL(question, $anchor.attr('href'), function (url) {
             var $msg = PMA_ajaxShowMessage(PMA_messages.strDroppingPrimaryKeyIndex, false);
             var params = getJSConfirmCommonParam(this, $anchor.getPostData());
             $.post(url, params, function (data) {

libraries/classes/Index.php

@@ -751,7 +751,7 @@ class Index
                         . ' DROP PRIMARY KEY;';
                     $this_params['message_to_show']
                         = __('The primary key has been dropped.');
-                    $js_msg = Sanitize::jsFormat($this_params['sql_query']);
+                    $js_msg = Sanitize::jsFormat($this_params['sql_query'], false);
                 } else {
                     $this_params['sql_query'] = 'ALTER TABLE '
                         . Util::backquote($table) . ' DROP INDEX '