> For the complete documentation index, see [llms.txt](https://docs.postgresql.tw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.postgresql.tw/server-programming/spi/spi-interface-support.md).

# 45.2. Interface Support Functions \#

[SPI\_fname](/server-programming/spi/spi-interface-support/spi-spi-fname.md) — determine the column name for the specified column number

[SPI\_fnumber](/server-programming/spi/spi-interface-support/spi-spi-fnumber.md) — determine the column number for the specified column name

[SPI\_getvalue](/server-programming/spi/spi-interface-support/spi-spi-getvalue.md) — return the string value of the specified column

[SPI\_getbinval](/server-programming/spi/spi-interface-support/spi-spi-getbinval.md) — return the binary value of the specified column

[SPI\_gettype](/server-programming/spi/spi-interface-support/spi-spi-gettype.md) — return the data type name of the specified column

[SPI\_gettypeid](/server-programming/spi/spi-interface-support/spi-spi-gettypeid.md) — return the data type OID of the specified column

[SPI\_getrelname](/server-programming/spi/spi-interface-support/spi-spi-getrelname.md) — return the name of the specified relation

[SPI\_getnspname](/server-programming/spi/spi-interface-support/spi-spi-getnspname.md) — return the namespace of the specified relation

[SPI\_result\_code\_string](/server-programming/spi/spi-interface-support/spi-spi-result-code-string.md) — return error code as string

The functions described here provide an interface for extracting information from result sets returned by `SPI_execute` and other SPI functions.

All functions described in this section can be used by both connected and unconnected C functions.

***

原文：[PostgreSQL 18.6 Documentation](https://www.postgresql.org/docs/18/spi-interface-support.html)（英文原文，待翻譯）


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