AlterQuery  check_query_comment_column (children 2)
 ExpressionList (children 5)
  AlterCommand COMMENT_COLUMN (children 2)
   Identifier first_column
   Literal \'comment 1_1\'
  AlterCommand COMMENT_COLUMN (children 2)
   Identifier second_column
   Literal \'comment 2_1\'
  AlterCommand COMMENT_COLUMN (children 2)
   Identifier third_column
   Literal \'comment 3_1\'
  AlterCommand COMMENT_COLUMN (children 2)
   Identifier fourth_column
   Literal \'comment 4_1\'
  AlterCommand COMMENT_COLUMN (children 2)
   Identifier fifth_column
   Literal \'comment 5_1\'
 Identifier check_query_comment_column