SAS/ACCESS 9.2 for Relational Databases: Reference, Fourth Edition

448 Using DBSLICE= 4 Chapter 14Using DBSLICE=You might achieve the best possible performance when using threaded reads byspecifying the “DBSLICE= Data Set Option” on page 316 for Aster nCluster in yourSAS operation. Using DBSLICE= allows connections to individual partitions so thatyou can configure an Aster nCluster data source for each partition. Use this option tospecify both the data source and the WHERE clause for each partition.proc print data=trilb.MYEMPS(DBSLICE=(DSN1=’EMPNUM BETWEEN 1 AND 33’DSN2=’EMPNUM BETWEEN 34 AND 66’DSN3=’EMPNUM BETWEEN 67 AND 100’));run;Using the DATASOURCE= option is not required to use DBSLICE= option withthreaded reads.Using DBSLICE= works well when the table you want to read is not stored inmultiple partitions. It gives you flexibility in column selection. For example, if youknow that the STATE column in your employee table contains only a few distinctvalues, you can tailor your DBSLICE= option accordingly.data work.locemp;set trlib2.MYEMP(DBSLICE=("STATE=’FL’" "STATE=’GA’""STATE=’SC’" "STATE=’VA’" "STATE=’NC’"));where EMPNUM