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>DECLARE</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN45910"
></A
><H2
>Name</H2
>DECLARE -- define a cursor</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN45913"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>DECLARE <TT
CLASS="REPLACEABLE"
><I
>cursor_name</I
></TT
> [ BINARY ] [ INSENSITIVE ] [ [ NO ] SCROLL ] CURSOR [ { WITH | WITHOUT } HOLD ] FOR <TT
CLASS="REPLACEABLE"
><I
>prepared_name</I
></TT
>
DECLARE <TT
CLASS="REPLACEABLE"
><I
>cursor_name</I
></TT
> [ BINARY ] [ INSENSITIVE ] [ [ NO ] SCROLL ] CURSOR [ { WITH | WITHOUT } HOLD ] FOR <TT
CLASS="REPLACEABLE"
><I
>query</I
></TT
></PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN45919"
></A
><H2
>Description</H2
><P
> <TT
CLASS="COMMAND"
>DECLARE</TT
> declares a cursor for iterating over
the result set of a prepared statement. This command has
slightly different semantics from the direct SQL
command <TT
CLASS="COMMAND"
>DECLARE</TT
>: Whereas the latter executes a
query and prepares the result set for retrieval, this embedded
SQL command merely declares a name as a <SPAN
CLASS="QUOTE"
>"loop
variable"</SPAN
> for iterating over the result set of a query;
the actual execution happens when the cursor is opened with
the <TT
CLASS="COMMAND"
>OPEN</TT
> command.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN45926"
></A
><H2
>Parameters</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="REPLACEABLE"
><I
>cursor_name</I
></TT
></DT
><DD
><P
> A cursor name, case sensitive. This can be an SQL identifier
or a host variable.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>prepared_name</I
></TT
></DT
><DD
><P
> The name of a prepared query, either as an SQL identifier or a
host variable.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>query</I
></TT
></DT
><DD
><P
> A <A
HREF="sql-select.html"
>SELECT</A
> or
<A
HREF="sql-values.html"
>VALUES</A
> command which will provide the
rows to be returned by the cursor.
</P
></DD
></DL
></DIV
><P
> For the meaning of the cursor options,
see <A
HREF="sql-declare.html"
>DECLARE</A
>.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN45948"
></A
><H2
>Examples</H2
><P
> Examples declaring a cursor for a query:
</P><PRE
CLASS="PROGRAMLISTING"
>EXEC SQL DECLARE C CURSOR FOR SELECT * FROM My_Table;
EXEC SQL DECLARE C CURSOR FOR SELECT Item1 FROM T;
EXEC SQL DECLARE cur1 CURSOR FOR SELECT version();</PRE
><P>
</P
><P
> An example declaring a cursor for a prepared statement:
</P><PRE
CLASS="PROGRAMLISTING"
>EXEC SQL PREPARE stmt1 AS SELECT version();
EXEC SQL DECLARE cur1 CURSOR FOR stmt1;</PRE
><P>
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN45954"
></A
><H2
>Compatibility</H2
><P
> <TT
CLASS="COMMAND"
>DECLARE</TT
> is specified in the SQL standard.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN45958"
></A
><H2
>See Also</H2
><A
HREF="ecpg-sql-open.html"
>OPEN</A
>, <A
HREF="sql-close.html"
>CLOSE</A
>, <A
HREF="sql-declare.html"
>DECLARE</A
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