SPI_prepare_extended — prepare a statement, without executing it yet
SPIPlanPtr SPI_prepare_extended(const char *command, const SPIPrepareOptions *options)
   SPI_prepare_extended creates and returns a prepared
   statement for the specified command, but doesn't execute the command.
   This function is equivalent to SPI_prepare,
   with the addition that the caller can specify options to control
   the parsing of external parameter references, as well as other facets
   of query parsing and planning.
  
const char * commandcommand string
const SPIPrepareOptions * optionsstruct containing optional arguments
   Callers should always zero out the entire options
   struct, then fill whichever fields they want to set.  This ensures forward
   compatibility of code, since any fields that are added to the struct in
   future will be defined to behave backwards-compatibly if they are zero.
   The currently available options fields are:
  
ParserSetupHook parserSetupParser hook setup function
void * parserSetupArg
      pass-through argument for parserSetup
     
RawParseMode parseMode
      mode for raw parsing; RAW_PARSE_DEFAULT (zero)
      produces default behavior
     
int cursorOptionsinteger bit mask of cursor options; zero produces default behavior
   SPI_prepare_extended has the same return conventions as
   SPI_prepare.