Error codes added for the percentile functions, the errors are

  -ER_NOT_SINGLE_ELEMENT_ORDER_LIST
  -ER_WRONG_TYPE_FOR_PERCENTILE_CONT
  -ER_ARGUMENT_NOT_CONSTANT
  -ER_ARGUMENT_OUT_OF_RANGE

Author: varunraiko

sql/share/errmsg-utf8.txt

@@ -7786,3 +7786,11 @@ ER_COMPRESSED_COLUMN_USED_AS_KEY
   eng "Compressed column '%-.192s' can't be used in key specification"
 ER_UNKNOWN_COMPRESSION_METHOD
   eng "Unknown compression method: %s"
+ER_NOT_SINGLE_ELEMENT_ORDER_LIST
+        eng "Incorrect number of elements in the order list for '%s'"
+ER_WRONG_TYPE_FOR_PERCENTILE_CONT
+        eng "Numeric datatype is required for Percentile_CONT function"
+ER_ARGUMENT_NOT_CONSTANT
+        eng "Argument to the percentile functions is not a constant"
+ER_ARGUMENT_OUT_OF_RANGE
+        eng "Argument to the percentile functions does not belong to the range [0,1]"