PostgreSQL 8.4.7 Documentation
Prev | Fast Backward |  | Fast Forward | Next

# SPI_cursor_open_with_args

## Name

SPI_cursor_open_with_args -- set up a cursor using a query and parameters

## Synopsis

    Portal SPI_cursor_open_with_args(const char *name,
                                     const char *command,
                                     int nargs, Oid *argtypes,
                                     Datum *values, const char *nulls,
                                     bool read_only, int cursorOptions)

## Description

`SPI_cursor_open_with_args` sets up a cursor (internally, a portal) that will execute the specified query. Most of the parameters have the same meanings as the corresponding parameters to `SPI_prepare_cursor` and `SPI_cursor_open`.

For one-time query execution, this function should be preferred over `SPI_prepare_cursor` followed by `SPI_cursor_open`. If the same command is to be executed with many different parameters, either method might be faster, depending on the cost of re-planning versus the benefit of custom plans.

The passed-in data will be copied into the cursor's portal, so it can be freed while the cursor still exists.

## Arguments

`const char * `name``

  name for portal, or `NULL` to let the system select a name

`const char * `command``

  command string

`int `nargs``

  number of input parameters (`$1`, `$2`, etc.)

`Oid * `argtypes``

  an array containing the OIDs of the data types of the parameters

`Datum * `values``

  an array of actual parameter values

`const char * `nulls``

  an array describing which parameters are null

  If `nulls` is `NULL` then `SPI_cursor_open_with_args` assumes that no parameters are null.

`bool `read_only``

  `true` for read-only execution

`int `cursorOptions``

  integer bitmask of cursor options; zero produces default behavior

## Return Value

Pointer to portal containing the cursor. Note there is no error return convention; any error will be reported via `elog`.

Prev | Home | Next
SPI_cursor_open | Up | SPI_cursor_find