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SPIPlanPtr SPI_prepare_cursor(const char * command, int nargs, Oid * argtypes, int cursorOptions)
SPI_prepare_cursor is identical to SPI_prepare, except that it also allows specification of the planner's "cursor options" parameter. This is a bitmask having the values shown in nodes/parsenodes.h for the options field of DeclareCursorStmt. SPI_prepare always takes these options as zero.
command string
number of input parameters ($1, $2, etc.)
pointer to an array containing the OIDs of the data types of the parameters
integer bitmask of cursor options; zero produces default behavior
Useful bits to set in cursorOptions include CURSOR_OPT_SCROLL, CURSOR_OPT_NO_SCROLL, and CURSOR_OPT_FAST_PLAN. Note in particular that CURSOR_OPT_HOLD is ignored.
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