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SPI_getvalue
PostgreSQL
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SPI_getvalue

Name

SPI_getvalue — Returns the string value of the specified attribute 
SPI_getvalue(tuple, tupdesc, fnumber)

Inputs

HeapTuple tuple

Input tuple to be examined

TupleDesc tupdesc

Input tuple description

int fnumber

Attribute number

Outputs

char *

Attribute value or NULL if

attribute is NULL
fnumber is out of range (SPI_result set to SPI_ERROR_NOATTRIBUTE)
no output function available (SPI_result set to SPI_ERROR_NOOUTFUNC)

Description

SPI_getvalue returns an external (string) representation of the value of the specified attribute.

Usage

Attribute numbers are 1 based.

Algorithm

Allocates memory as required by the value.

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