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><H1
><A
NAME="ECPG-SQL-SET-DESCRIPTOR"
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>SET DESCRIPTOR</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN45706"
></A
><H2
>Name</H2
>SET DESCRIPTOR -- set information in an SQL descriptor area</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN45709"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>SET DESCRIPTOR <TT
CLASS="REPLACEABLE"
><I
>descriptor_name</I
></TT
> <TT
CLASS="REPLACEABLE"
><I
>descriptor_header_item</I
></TT
> = <TT
CLASS="REPLACEABLE"
><I
>value</I
></TT
> [, ... ]
SET DESCRIPTOR <TT
CLASS="REPLACEABLE"
><I
>descriptor_name</I
></TT
> VALUE <TT
CLASS="REPLACEABLE"
><I
>number</I
></TT
> <TT
CLASS="REPLACEABLE"
><I
>descriptor_item</I
></TT
> = <TT
CLASS="REPLACEABLE"
><I
>value</I
></TT
> [, ...]</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN45718"
></A
><H2
>Description</H2
><P
> <TT
CLASS="COMMAND"
>SET DESCRIPTOR</TT
> populates an SQL descriptor
area with values. The descriptor area is then typically used to
bind parameters in a prepared query execution.
</P
><P
> This command has two forms: The first form applies to the
descriptor <SPAN
CLASS="QUOTE"
>"header"</SPAN
>, which is independent of a
particular datum. The second form assigns values to particular
datums, identified by number.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN45724"
></A
><H2
>Parameters</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="REPLACEABLE"
><I
>descriptor_name</I
></TT
></DT
><DD
><P
> A descriptor name.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>descriptor_header_item</I
></TT
></DT
><DD
><P
> A token identifying which header information item to set.
Only <TT
CLASS="LITERAL"
>COUNT</TT
>, to set the number of descriptor
items, is currently supported.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>number</I
></TT
></DT
><DD
><P
> The number of the descriptor item to set. The count starts at
1.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>descriptor_item</I
></TT
></DT
><DD
><P
> A token identifying which item of information to set in the
descriptor. See <A
HREF="ecpg-descriptors.html#ECPG-NAMED-DESCRIPTORS"
>Section 33.7.1</A
> for a
list of supported items.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>value</I
></TT
></DT
><DD
><P
> A value to store into the descriptor item. This can be an SQL
constant or a host variable.
</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN45754"
></A
><H2
>Examples</H2
><PRE
CLASS="PROGRAMLISTING"
>EXEC SQL SET DESCRIPTOR indesc COUNT = 1;
EXEC SQL SET DESCRIPTOR indesc VALUE 1 DATA = 2;
EXEC SQL SET DESCRIPTOR indesc VALUE 1 DATA = :val1;
EXEC SQL SET DESCRIPTOR indesc VALUE 2 INDICATOR = :val1, DATA = 'some string';
EXEC SQL SET DESCRIPTOR indesc VALUE 2 INDICATOR = :val2null, DATA = :val2;</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
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></A
><H2
>Compatibility</H2
><P
> <TT
CLASS="COMMAND"
>SET DESCRIPTOR</TT
> is specified in the SQL standard.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN45761"
></A
><H2
>See Also</H2
><A
HREF="ecpg-sql-allocate-descriptor.html"
>ALLOCATE DESCRIPTOR</A
>, <A
HREF="ecpg-sql-get-descriptor.html"
>GET DESCRIPTOR</A
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