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>DESCRIBE</H1
><DIV
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><A
NAME="AEN45358"
></A
><H2
>Name</H2
>DESCRIBE -- obtain information about a prepared statement or result set</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN45361"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>DESCRIBE [ OUTPUT ] <TT
CLASS="REPLACEABLE"
><I
>prepared_name</I
></TT
> USING [ SQL ] DESCRIPTOR <TT
CLASS="REPLACEABLE"
><I
>descriptor_name</I
></TT
>
DESCRIBE [ OUTPUT ] <TT
CLASS="REPLACEABLE"
><I
>prepared_name</I
></TT
> INTO [ SQL ] DESCRIPTOR <TT
CLASS="REPLACEABLE"
><I
>descriptor_name</I
></TT
>
DESCRIBE [ OUTPUT ] <TT
CLASS="REPLACEABLE"
><I
>prepared_name</I
></TT
> INTO <TT
CLASS="REPLACEABLE"
><I
>sqlda_name</I
></TT
></PRE
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><DIV
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><A
NAME="AEN45369"
></A
><H2
>Description</H2
><P
> <TT
CLASS="COMMAND"
>DESCRIBE</TT
> retrieves metadata information about
the result columns contained in a prepared statement, without
actually fetching a row.
</P
></DIV
><DIV
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><A
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><H2
>Parameters</H2
><P
></P
><DIV
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><DL
><DT
><TT
CLASS="REPLACEABLE"
><I
>prepared_name</I
></TT
></DT
><DD
><P
> The name of a prepared statement. This can be an SQL
identifier or a host variable.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>descriptor_name</I
></TT
></DT
><DD
><P
> A descriptor name. It is case sensitive. It can be an SQL
identifier or a host variable.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>sqlda_name</I
></TT
></DT
><DD
><P
> The name of an SQLDA variable.
</P
></DD
></DL
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><A
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></A
><H2
>Examples</H2
><PRE
CLASS="PROGRAMLISTING"
>EXEC SQL ALLOCATE DESCRIPTOR mydesc;
EXEC SQL PREPARE stmt1 FROM :sql_stmt;
EXEC SQL DESCRIBE stmt1 INTO SQL DESCRIPTOR mydesc;
EXEC SQL GET DESCRIPTOR mydesc VALUE 1 :charvar = NAME;
EXEC SQL DEALLOCATE DESCRIPTOR mydesc;</PRE
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><H2
>Compatibility</H2
><P
> <TT
CLASS="COMMAND"
>DESCRIBE</TT
> is specified in the SQL standard.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN45398"
></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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