Postgresql 中文操作指南
SPI_copytuple
SPI_copytuple — 在上层执行器上下文中复制一行
SPI_copytuple — make a copy of a row in the upper executor context
Description
SPI_copytuple 在上层执行器上下文中复制一行。通常用于从触发器返回修改后的行。在声明为返回复合类型函数中,而是使用 SPI_returntuple 。
SPI_copytuple makes a copy of a row in the upper executor context. This is normally used to return a modified row from a trigger. In a function declared to return a composite type, use SPI_returntuple instead.
此函数只能在连接到 SPI 时使用。否则,返回 NULL,并将 SPI_result 设置为 SPI_ERROR_UNCONNECTED 。
This function can only be used while connected to SPI. Otherwise, it returns NULL and sets SPI_result to SPI_ERROR_UNCONNECTED.