PostgreSQL 9.4.26 Documentation
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# SPI_getvalue

## Name

SPI_getvalue -- return the string value of the specified column

## Synopsis

    char * SPI_getvalue(HeapTuple row, TupleDesc rowdesc, int colnumber)

## Description

`SPI_getvalue` returns the string representation of the value of the specified column.

The result is returned in memory allocated using `palloc`. (You can use `pfree` to release the memory when you don't need it anymore.)

## Arguments

`HeapTuple `row``

  input row to be examined

`TupleDesc `rowdesc``

  input row description

`int `colnumber``

  column number (count starts at 1)

## Return Value

Column value, or `NULL` if the column is null, `colnumber` is out of range (`SPI_result` is set to `SPI_ERROR_NOATTRIBUTE`), or no output function is available (`SPI_result` is set to `SPI_ERROR_NOOUTFUNC`).

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