|Oracle® OLAP DML Reference
10g Release 2 (10.2)
|PDF · Mobi · ePub|
The MAXFETCH option sets an upper limit on the size of a data block generated by a FETCH statement specified in the OLAP_command parameter of the
See also:For more information on using FETCH statements, see FETCH. For more information on the
OLAP_TABLEfunction, see the Oracle OLAP Reference.
MAXFETCH = integer-expression
INTEGER expression representing the maximum size in bytes of a data block generated by FETCH. The minimum value for MAXFETCH is 1K (approximately 1,000 bytes), and the maximum value is 2GB (approximately 2,000,000,000 bytes). The default value of MAXFETCH is
The setting of MAXFETCH can effect the performance of queries using the
OLAP_TABLE function. Large queries with joins of
OLAP_TABLE function may run faster with higher settings. However, larger settings use more memory which can cause slower performance when there are multiple users. The setting of MAXFETCH does not affect a
SELECT using only one
When FETCH cannot package a data block within the size limit set by MAXFETCH, it produces an error, and no data is returned to the client. By setting MAXFETCH, you can produce an error, rather than run out of memory, when you attempt to fetch too much data.
MAXFETCH = 4096