SPI_is_cursor_plan
Name
SPI_is_cursor_plan -- return 
true if a plan
  prepared by 
SPI_prepare can be used with
  
SPI_cursor_openSynopsis
bool SPI_is_cursor_plan(void * plan)
Description
   SPI_is_cursor_plan returns true
   if a plan prepared by SPI_prepare can be passed
   as an argument to SPI_cursor_open and    false if that is not the case. The criteria are that the
   plan represents one single command and that this
   command is a SELECT without an INTO
   clause.
  
Arguments
- void * plan
       execution plan (returned by SPI_prepare)
     
Return Value
    true or false to indicate if the
    plan can produce a cursor or not, or
    SPI_ERROR_ARGUMENT if the plan
    is NULL