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>SPI_fnumber</H1
><DIV
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NAME="AEN61650"
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><H2
>Name</H2
>SPI_fnumber -- determine the column number for the specified column name</DIV
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NAME="AEN61655"
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><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>int SPI_fnumber(TupleDesc <TT
CLASS="PARAMETER"
>rowdesc</TT
>, const char * <TT
CLASS="PARAMETER"
>colname</TT
>)</PRE
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><H2
>Description</H2
><P
> <CODE
CLASS="FUNCTION"
>SPI_fnumber</CODE
> returns the column number for the
column with the specified name.
</P
><P
> If <TT
CLASS="PARAMETER"
>colname</TT
> refers to a system column (e.g.,
<TT
CLASS="LITERAL"
>oid</TT
>) then the appropriate negative column number will
be returned. The caller should be careful to test the return value
for exact equality to <TT
CLASS="SYMBOL"
>SPI_ERROR_NOATTRIBUTE</TT
> to
detect an error; testing the result for less than or equal to 0 is
not correct unless system columns should be rejected.
</P
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><H2
>Arguments</H2
><P
></P
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><DL
><DT
><TT
CLASS="LITERAL"
>TupleDesc <TT
CLASS="PARAMETER"
>rowdesc</TT
></TT
></DT
><DD
><P
> input row description
</P
></DD
><DT
><TT
CLASS="LITERAL"
>const char * <TT
CLASS="PARAMETER"
>colname</TT
></TT
></DT
><DD
><P
> column name
</P
></DD
></DL
></DIV
></DIV
><DIV
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><A
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></A
><H2
>Return Value</H2
><P
> Column number (count starts at 1), or
<TT
CLASS="SYMBOL"
>SPI_ERROR_NOATTRIBUTE</TT
> if the named column was not
found.
</P
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