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The PostgreSQL 9.0 Reference Manual - Volume 2 - Programming Guide
by The PostgreSQL Global Development Group
Paperback (6"x9"), 478 pages
ISBN 9781906966065
RRP £14.95 ($19.95)

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13.1.9 SPI_prepare_cursor

Name

SPI_prepare_cursor -- prepare a plan for a command, 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, and CURSOR_OPT_FAST_PLAN. Note in particular that CURSOR_OPT_HOLD is ignored.

ISBN 9781906966065The PostgreSQL 9.0 Reference Manual - Volume 2 - Programming GuideSee the print edition