Replication Management API Reference, 49 of 179

MAKE procedure

This procedure specifies the members of a refresh group and the time interval used to determine when the members of this group should be refreshed.

See Also:
"CREATE REFRESH GROUP", and see Chapter 3, "Snapshot Concepts & Architecture" in Oracle8i Replication.

Syntax

DBMS_REFRESH.MAKE (
   name                   IN    VARCHAR2
   { list                 IN    VARCHAR2,
   | tab                IN     DBMS_UTILITY.UNCL_ARRAY,}
   next_date              IN     DATE,
   interval               IN     VARCHAR2,
   implicit_destroy     IN     BOOLEAN         := FALSE,
   lax                  IN     BOOLEAN         := FALSE,
   job                  IN     BINARY INTEGER  := 0,
   rollback_seg         IN     VARCHAR2        := NULL,
   push_deferred_rpc    IN     BOOLEAN         := TRUE,
   refresh_after_errors IN     BOOLEAN         := FALSE)
   purge_option            IN     BINARY_INTEGER := NULL,
   parallelism             IN     BINARY_INTEGER := NULL,
   heap_size               IN     BINARY_INTEGER := NULL);

Note:
This procedure is overloaded. The list and tab parameters are mutually exclusive.

Table 8-78 MAKE Procedure Parameters (Page 1 of 2)

Parameter	Description
name	Unique name used to identify the refresh group. Refresh groups must follow the same naming conventions as tables.
list	Comma-separated list of snapshots that you want to refresh. (Synonyms are not supported.) These snapshots can be located in different schemas and have different master tables; however, all of the listed snapshots must be in your current database.
tab	Instead of a comma separated list, you can supply a PL/SQL table of names of snapshots that you want to refresh using the datatype `DBMS_UTILITY`.`UNCL_ARRAY`. If the table contains the names of n snapshots, then the first snapshot should be in position 1 and the n + 1 position should be set to `NULL`.
next_date	Next date that you want a refresh to occur.
interval	Function used to calculate the next time to refresh the snapshots in the group. This field is used with the `NEXT_DATE` value. For example, if you specify `NEXT_DAY(SYSDATE+1,` `"MONDAY")` as your interval, and if your `NEXT_DATE` evaluates to Monday, then Oracle refreshes the snapshots every Monday. This interval is evaluated immediately before the refresh. Thus, you should select an interval that is greater than the time it takes to perform a refresh.
implicit_destroy	Set this to `TRUE` if you want to delete the refresh group automatically when it no longer contains any members. Oracle checks this flag only when you call the `SUBTRACT` procedure. That is, setting this flag still allows you to create an empty refresh group.
lax	A snapshot can belong to only one refresh group at a time. If you are moving a snapshot from an existing group to a new refresh group, then you must set this to `TRUE` to succeed. Oracle then automatically removes the snapshot from the other refresh group and updates its refresh interval to be that of its new group. Otherwise, the call to `MAKE` generates an error message.
job	Needed by the Import utility. Use the default value, 0.
rollback_seg	Name of the rollback segment to use while refreshing snapshots. The default, `NULL`, uses the default rollback segment.
push_deferred_rpc	Used by updatable snapshots only. Use the default value, `TRUE`, if you want to push changes from the snapshot to its associated master before refreshing the snapshot. Otherwise, these changes may appear to be temporarily lost.
refresh_after_errors	Used by updatable snapshots only. Set this to 0 if you want the refresh to proceed even if there are outstanding conflicts logged in the `DEFERROR` view for the snapshot's master.
purge_option	If you are using the parallel propagation mechanism (in other words, parallelism is set to 1 or greater), then 0 = do not purge; 1 = lazy (default); 2 = aggressive. In most cases, lazy purge is the optimal setting. Set purge to aggressive to trim back the queue if multiple master replication groups are pushed to different target sites, and updates to one or more replication groups are infrequent and infrequently pushed. If all replication groups are infrequently updated and pushed, then set purge to do not purge and occasionally execute `PUSH` with purge set to aggressive to reduce the queue.
parallelism	0 specifies serial propagation; n > 1 specifies parallel propagation with n parallel server processes; 1 specifies parallel propagation using only one parallel server process.
heap_size	Maximum number of transactions to be examined simultaneously for parallel propagation scheduling. Oracle automatically calculates the default setting for optimal performance. Do not set this unless so directed by Oracle Worldwide Support.