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SPI_prepare_cursor
Name
SPI_prepare_cursor -- prepare a statement, without
executing it yet
Synopsis
SPIPlanPtr SPI_prepare_cursor(const char * command, int nargs,
Oid * argtypes, int cursorOptions)
Description
SPI_prepare_cursor is identical to
SPI_prepare, except that it also
allows specification of the planner's "cursor
options" parameter. This is a bit mask having the values
shown in nodes/parsenodes.h for the
options field of DeclareCursorStmt. SPI_prepare always takes the cursor options as
zero.
Arguments
- const char * command
-
command string
- int nargs
-
number of input parameters ($1,
$2, etc.)
- Oid * argtypes
-
pointer to an array containing the OIDs of the data types of the parameters
- int cursorOptions
-
integer bit mask of cursor options; zero produces default
behavior
Return Value
SPI_prepare_cursor has the same
return conventions as SPI_prepare.
Notes
Useful bits to set in cursorOptions
include CURSOR_OPT_SCROLL, CURSOR_OPT_NO_SCROLL, CURSOR_OPT_FAST_PLAN, CURSOR_OPT_GENERIC_PLAN, and CURSOR_OPT_CUSTOM_PLAN. Note in particular that
CURSOR_OPT_HOLD is ignored.