# Random Id (Continue...)

+ Restrictions on use:
  + AUTO_RANDOM column types can only be BIGINT
  + If the primary key attribute is NONCLUSTERED, the use of AUTO_RANDOM is not supported even for integer primary key columns
  + Using ALTER TABLE to modify the AUTO_RANDOM attribute, including adding or removing the attribute, is not supported
  + modify the column type of a primary key column with the AUTO_RANDOM attribute is not supported
  + Specifying on the same column as AUTO_INCREMENT is not supported
  + Specifying on the same column as the default value of the column DEFAULT is not supported
  + It is not recommended that you explicitly specify a value that contains an AUTO_RANDOM column when inserting data. This may cause the table to prematurely run out of values for automatic allocation
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- Restrictions on use
  - AUTO_RANDOM column types can only be BIGINT types.
  - If the primary key attribute is NONCLUSTERED, the use of AUTO_RANDOM is not supported even for integer primary key columns
- Using ALTER TABLE to modify the AUTO_RANDOM property, including adding or removing the attribute, is not supported.
- modify the column type of a primary key column with the AUTO_RANDOM attribute is not supported.
- Specifying on the same column as AUTO_INCREMENT is not supported.
- Specifying on the same column as the default value of the column DEFAULT is not supported.
- When inserting data, it is not recommended to explicitly specify a value that contains the AUTO_RANDOM column. This may cause the table to prematurely run out of values for automatic allocation.