HeapTuple SPI_copytuple(HeapTuple row)
SPI_copytuple 婘婪北欓臯蔙䯇嵄麯彽嘩婔婻臯䔇拙蘺㔗認婻庘昄锔婩䫘庯傯蓥埏単麯誫啂婔婻媞櫹誺䔇臯㔗婘弄滯婺誫啂崉劽䌂傋䔇庘昄麯庫臖嘪䫘 SPI_returntuple
SPI_copytuple
SPI_returntuple
襕拙蘺䔇臯
拙蘺臯埻橬婘 tuple 滇 NULL 䔇施唍婺 NULL