Returns the current INT64 value of a sequence
defined in the specified database.
Syntax
DYNAMIC-CURRENT-VALUE(
sequence-expression , logical-dbname-expression [ , tenant-id ] )
|
-
sequence-expression
- A character expression that evaluates to the name of a sequence.
-
logical-dbname-expression
- A character expression that evaluates to the name of a connected database
in which the sequence is defined.
-
tenant-id
- An integer expression that evaluates to the tenant ID of a regular tenant,
including the default tenant (0). This option applies
only to a multi-tenant sequence specified by sequence-expression and
is intended for access primarily by a super-tenant user.
-
If you are a regular-tenant user and you specify tenant-id, the
specified tenant must be the same as the tenant associated with the database
connection identity for logical-dbname-expression or the AVM raises
a run-time error.
If you are a super-tenant user and you do not specify tenant-id,
the function assumes the effective tenant ID (GET-EFFECTIVE-TENANT-ID function).
If the sequence specified by sequence-expression is
non-multi-tenant (a shared sequence in a multi-tenant database), and you specify
tenant-id, the option is ignored.
Notes
- If logical-dbname-expression contains the Unknown value
(?), the AVM generates a run-time error.
- The user must have CAN-READ privileges on the _Sequence table to use the
DYNAMIC-CURRENT-VALUE function.
- The current value of a sequence can be one of the following:
- The initial value specified in the Data Dictionary.
- The last value set with either the DYNAMIC-CURRENT-VALUE statement or the
DYNAMIC-NEXT-VALUE function.
- The Unknown value (?) if the sequence has exceeded its minimum or
maximum and is not cycling.
- If sequence-expression is a multi-tenant sequence in the database,
each regular tenant has their own current value of the sequence. So, the same values are
returned for each tenant that invokes this function. If the sequence is shared in a
multi-tenant database, the values returned by this function are unique across all tenants
in the database.
Caution:
Be very careful using multi-tenant sequences when you
are updating shared tables or multi-tenant tables for a tenant group. For more
information, see the sections on using multi-tenant-enabled sequences in OpenEdge
Development: Programming Interfaces.
- Sequence values are stored in the database in which they are defined, and persist
between each invocation of the DYNAMIC-CURRENT-VALUE statement or DYNAMIC-NEXT-VALUE
function.
- You cannot invoke the DYNAMIC-CURRENT-VALUE function from within a WHERE clause. Doing
so generates a compiler error. To use a result from the DYNAMIC-CURRENT-VALUE function in
a WHERE clause, assign the result to a variable, then use the variable in the WHERE
clause.
- You can use any combination of the DYNAMIC-NEXT-VALUE function, DYNAMIC-CURRENT-VALUE
function, DYNAMIC-CURRENT-VALUE statement, and their non-dynamic versions.
