Provided by: postgresql-doc-11_11.5-1_all bug


       SPI_freetuptable - free a row set created by SPI_execute or a similar function


       void SPI_freetuptable(SPITupleTable * tuptable)


       SPI_freetuptable frees a row set created by a prior SPI command execution function, such
       as SPI_execute. Therefore, this function is often called with the global variable
       SPI_tuptable as argument.

       This function is useful if an SPI-using C function needs to execute multiple commands and
       does not want to keep the results of earlier commands around until it ends. Note that any
       unfreed row sets will be freed anyway at SPI_finish. Also, if a subtransaction is started
       and then aborted within execution of an SPI-using C function, SPI automatically frees any
       row sets created while the subtransaction was running.

       Beginning in PostgreSQL 9.3, SPI_freetuptable contains guard logic to protect against
       duplicate deletion requests for the same row set. In previous releases, duplicate
       deletions would lead to crashes.


       SPITupleTable * tuptable
           pointer to row set to free, or NULL to do nothing