BLOCKCHAIN_TABLE_MAX_NO_DROP

BLOCKCHAIN_TABLE_MAX_NO_DROP lets you control the maximum amount of idle time that can be specified when creating a blockchain table or an immutable table. The idle time represents the length of time the table must be inactive before it can be dropped. When explicitly set by a user, the only value allowed for this parameter is 0.

Property	Description
Parameter type	Integer
Default value	None
Modifiable	ALTER SYSTEM
Modifiable in a PDB	Yes
Range of values	None or 0
Basic	No
Oracle RAC	The same value must be used on all instances.

When creating a blockchain table or an immutable table with the SQL statement CREATE TABLE, you can specify the clause NO DROP UNTIL <number> DAYS IDLE. This clause specifies the number of days the table must be inactive before it can be dropped, that is, the number of days that must pass after the most recent row insertion before the table can be dropped.

• If BLOCKCHAIN_TABLE_MAX_NO_DROP is set to 0, then when a user creates a blockchain table or an immutable table, and specifies the NO DROP UNTIL <number> DAYS IDLE clause, the value of number must be 0:

  CREATE BLOCKCHAIN TABLE ... NO DROP UNTIL 0 DAYS IDLE ...
  CREATE IMMUTABLE TABLE ... NO DROP UNTIL 0 DAYS IDLE ...

  This allows the table to be dropped at any time, regardless of how long the table has been inactive.

• If BLOCKCHAIN_TABLE_MAX_NO_DROP is not set, then when a user creates a blockchain table or an immutable table, and specifies the NO DROP UNTIL <number> DAYS IDLE clause, any number value can be specified for <number>.

See Also: Oracle AI Database SQL Language Reference for information about the CREATE TABLE statement