Context: Added custom mode that avoids escaping when possible.

Author: udan11

src/Context.php

@@ -190,6 +190,13 @@ abstract class Context
     // https://dev.mysql.com/doc/refman/5.0/en/sql-mode.html#sqlmode_strict_trans_tables
     const STRICT_TRANS_TABLES           = 1048576;
 
+    // Custom modes.
+
+    // The table and column names and any other field that must be escaped will
+    // not be.
+    // Reserved keywords are being escaped regardless this mode is used or not.
+    const NO_ENCLOSING_QUOTES           = 1073741824;
+
     /*
      * Combination SQL Modes
      * https://dev.mysql.com/doc/refman/5.0/en/sql-mode.html#sql-mode-combo
@@ -520,9 +527,16 @@ public static function escape($str, $quote = '`')
             return $str;
         }
 
+        if ((static::$MODE & Context::NO_ENCLOSING_QUOTES)
+            && (!static::isKeyword($str, true))
+        ) {
+            return $str;
+        }
+
         if (static::$MODE & Context::ANSI_QUOTES) {
             $quote = '"';
         }
+
         return $quote . str_replace($quote, $quote . $quote, $str) . $quote;
     }
 }