Thanks barwick, Is the process crash also expected, And dose anyone considered enhancing this API? 05.02.2021, 10:55, "Ian Lawrence Barwick" :2021年2月5日(金) 11:38 sasa su <i...@sasa.su>:Hi. When running a query with a not exist table in SPI_exec. the process exit with -1 in SPI_exec function.the error code SPI_ERROR_REL_NOT_FOUND never return. I made a minimal reproduction code in https://github.com/Sasasu/worker_spi_table_not_exist The core code is: int spi = SPI_exec("select * from not_exist_table", 0); // can not reach here Assert(spi == SPI_ERROR_REL_NOT_FOUND); The list of return codes returned by SPI_exec is here: https://www.postgresql.org/docs/current/spi-spi-execute.html and doesn't include "SPI_ERROR_REL_NOT_FOUND". The onlyfunction which does return that is SPI_unregister_relation, see: https://www.postgresql.org/docs/current/spi-spi-unregister-relation.html Regards Ian Barwick--EnterpriseDB: https://www.enterprisedb.com