Use Case

Use Case: Filter Initial Load

You don't want to load the entire source table but a filter on the SLT is not the optimal solution as most of the data is transferred to the SLT system and skipped here. In case you filter a significant part of a table it's better to already limit the reader module of the initial load accordingly

Ensure that you use a reading type 4/5. Without it will not work.

Use Case: Parallelize Replication

You need to parallelize the replication of a table as there are high change rates and one parallel task can not catch up delta data within expected latency time.

Process

With DMIS 2011 SP6 a new table is available where Filter for the Initial Load and / or settings to parallelize the replication can be defined. The eintries in table DMC_ACSPL_SELECT have to be defined on the SLT systems

The value has to be defined properly based on the internal format of the corresponding data type. Character-like field values have to be defined with single quotes. NUMC fields have to be defined with single quotes and leading zeros.

Process: Filter Initial Load & Replication

You can enter filter criteria for any field of the source table. If you enter mutliple filter criteria for one field you have to define a gating operator (AND / OR). If you define filter on multiple fields the filter from the indiviual fields will be concatenated with gating operator AND.
If you define a filter for the replication also a filter on the DB trigger is recommended as otherwise the changes that don't fit to the filter criteria will not be handled and remain in the logging table.

Example 1: Filter on one field for a single value
Define filter criteria for table BKPF in mass transfer ID 001. Only those records should be loaded where GJAHR is greater or equal 2013. The filter criteria shall be relevant for initial load and replication

The following where clause will be used for the select:

Example 2: Filter on one fieldfor mutliple values
Define filter criteria for table BKPF in mass transfer ID 001. Only those records should be loaded where BUKRS is equal 0010 or between 1000 and 3000. The filter criteria shall be relevant for the initial load only

The following where clause will be used for the select:

Example 3: Filter on multiple fields
Define filter criteria for table BKPF in mass transfer ID 001. Only those records should be loaded where GKAHR is greater or equal 2013 and where BUKRS is equal 0010 or between 1000 and 3000. The filter criteria shall be relevant for the initial load only

The following where clause will be used for the select:

Process: Parallelize Replication

You can enter ranges to split the replication into parallel tasks. The number of defined ranges also defines the maximum parallel processing of the current table. How many jobs will finally procssing a table is defined by the overall number of jobs and the maximum number of parllel jobs defined for a table (can be defined in LTRC -> Data Transfer Monitor). If you define range criteria for the parallelization of the replication you need to define disjount subsets of the data to be processed by each of the replication jobs.

Example 1: Parallelize Replication
Split replication of table BKPF in mass transfer ID 001 into 4 ranges. The ranges are defined based on field:
Range 1: 0000 -> 2000
Range 2: 2000 -> 5000
Range 3: 5000 -> 8000
Range 4: 8000 -> 9999

The following where clause will be used for the select:

Range 1:

SELECTFROMBKPF WHEREBUKRS <= '2000'. 

Range 2:

SELECTFROMBKPF WHEREBUKRS > '2000'ANDBUKRS <= '5000'.

Range 3:

SELECTFROMBKPF WHEREBUKRS > '5000'ANDBUKRS <= '8000'.

Range 4:

SELECTFROMBKPF WHEREBUKRS > '8000'.

Example 2: Parallelize Replication & Filter
Split replication of table BKPF in mass transfer ID 001 into 4 ranges as defined in example 1. In addition only those records should be loaded where GJAHR is greater or equal 2013.

The following where clause will be used for the select:

Range 1:

SELECTFROMBKPF WHEREGJAHR >= 2013 AND BUKRS <= '2000'.

Range 2:

SELECTFROMBKPF WHEREGJAHR >= 2013 AND BUKRS > '2000'ANDBUKRS <= '5000'.

Range 3:

SELECTFROMBKPF WHEREGJAHR >= 2013 AND BUKRS > '5000'ANDBUKRS <= '8000'.

Range 4:

SELECTFROMBKPF WHEREGJAHR >= 2013 AND BUKRS > '8000'.

Enjoy this new features

Best,
Tobias