SPI_CURSOR_FETCH(3) PostgreSQL 9.2.7 Documentation SPI_CURSOR_FETCH(3)NAME
SPI_cursor_fetch - fetch some rows from a cursor
SYNOPSIS
void SPI_cursor_fetch(Portal portal, bool forward, long count)
DESCRIPTION
SPI_cursor_fetch fetches some rows from a cursor. This is equivalent to a subset of the SQL command FETCH (see SPI_scroll_cursor_fetch for
more functionality).
ARGUMENTS
Portal portal
portal containing the cursor
bool forward
true for fetch forward, false for fetch backward
long count
maximum number of rows to fetch
RETURN VALUE
SPI_processed and SPI_tuptable are set as in SPI_execute if successful.
NOTES
Fetching backward may fail if the cursor's plan was not created with the CURSOR_OPT_SCROLL option.
PostgreSQL 9.2.7 2014-02-17 SPI_CURSOR_FETCH(3)
Check Out this Related Man Page
MOVE(7) SQL Commands MOVE(7)NAME
MOVE - position a cursor on a specified row of a table
SYNOPSIS
MOVE [ direction ] [ count ]
{ IN | FROM } cursor
DESCRIPTION
MOVE allows a user to move cursor position a specified number of rows. MOVE works like the FETCH command, but only positions the cursor
and does not return rows.
Refer to FETCH [fetch(7)] for details on syntax and usage.
NOTES
MOVE is a PostgreSQL language extension.
Refer to FETCH [fetch(7)] for a description of valid arguments. Refer to DECLARE [declare(7)] to define a cursor. Refer to BEGIN
[begin(7)], COMMIT [commit(7)], and ROLLBACK [rollback(7)] for further information about transactions.
USAGE
Set up and use a cursor:
BEGIN WORK;
DECLARE liahona CURSOR FOR SELECT * FROM films;
-- Skip first 5 rows:
MOVE FORWARD 5 IN liahona;
MOVE
-- Fetch 6th row in the cursor liahona:
FETCH 1 IN liahona;
FETCH
code | title | did | date_prod | kind | len
-------+--------+-----+-----------+--------+-------
P_303 | 48 Hrs | 103 | 1982-10-22| Action | 01:37
(1 row)
-- close the cursor liahona and commit work:
CLOSE liahona;
COMMIT WORK;
COMPATIBILITY
SQL92
There is no SQL92 MOVE statement. Instead, SQL92 allows one to FETCH rows from an absolute cursor position, implicitly moving the cursor
to the correct position.
SQL - Language Statements 2002-11-22 MOVE(7)
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