The mi_tab_niorows() accessor function
The mi_tab_niorows() function retrieves the number of rows that the database server expects to process in am_getnext.
Syntax
mi_integer
mi_tab_niorows(MI_AM_TABLE_DESC *tableDesc)- tableDesc
- Points to the table descriptor.
Usage
Call this function from am_getnext and then loop through the scan as often as necessary to fill the reserved number of rows or until no more rows qualify. See mi_tab_setnextrow() for an example.
Return values
The maximum number of rows that am_getnext can place in shared memory.
A
return value of 0 indicates that am_open or am_beginscan did
not call the mi_tab_setniorows() function or that mi_tab_setniorows() returned
an error. Thus, the database server did not reserve memory for multiple
rows, and the access method must process only one row.
A negative return value indicates an error.