When Threaded Reads Do Not Occur
Threading does not
occur under these circumstances:
- when a BY statement
is used in a PROC or DATA step
- when the OBS option
or the FIRSTOBS option is in a PROC or DATA step
- when the KEY option
or the DBKEY option is used PROC or DATA step
- if no column in the
table exists to which SAS can apply the MOD function (for more information,
see Autopartitioning Techniques in SAS/ACCESS)
- if all columns within
a table to which SAS can apply the MOD function are in WHERE clauses (for more information,
see Autopartitioning Techniques in SAS/ACCESS)
- if the NOTHREADS system
option is specified
- if DBSLICEPARM=NONE
Last updated: February 3, 2026