as comments new 4 fields

-- Проверка поля guid uniqueidentifier:-- @tmp_NULLABLE: 1 @strNULLABLE:  NULL
-- @tmp_PRECISION: 0,  @tmp_SCALE: 0,  @tmp_RADIX: -1
IF COL_LENGTH( 'as_comments', 'guid') IS NULL
   BEGIN
   ALTER TABLE as_comments
   ADD [guid] uniqueidentifier (max) NULL
END
-- Проверка поля hasCheck bit:-- @tmp_NULLABLE: 1 @strNULLABLE:  NULL
-- @tmp_PRECISION: 0,  @tmp_SCALE: 0,  @tmp_RADIX: -1
IF COL_LENGTH( 'as_comments', 'hasCheck') IS NULL
   BEGIN
   ALTER TABLE as_comments
   ADD [hasCheck] bit NULL
END
-- Проверка поля checked datetime:-- @tmp_NULLABLE: 1 @strNULLABLE:  NULL
-- @tmp_PRECISION: 0,  @tmp_SCALE: 0,  @tmp_RADIX: -1
IF COL_LENGTH( 'as_comments', 'checked') IS NULL
   BEGIN
   ALTER TABLE as_comments
   ADD [checked] datetime NULL
END
-- Проверка поля checkedBy nvarchar:-- @tmp_NULLABLE: 1 @strNULLABLE:  NULL
-- @tmp_PRECISION: 64,  @tmp_SCALE: 0,  @tmp_RADIX: -1
IF COL_LENGTH( 'as_comments', 'checkedBy') IS NULL
   BEGIN
   ALTER TABLE as_comments
   ADD [checkedBy] nvarchar (64) NULL
END