SPI_cursor_fetch
Name
SPI_cursor_fetch -- fetch some rows from a cursor
Synopsis
void SPI_cursor_fetch(Portal portal, bool forward, long count)
描述
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).
参数
- Portal portal
portal containing the cursor
- bool forward
true for fetch forward, false for fetch backward
- long count
maximum number of rows to fetch
返回值
SPI_processed and
SPI_tuptable are set as in
SPI_execute if successful.
注解
Fetching backward may fail if the cursor's plan was not created
with the CURSOR_OPT_SCROLL option.