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>SQL Query and FETCH clause</A
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><P
> A query may be issued by either defining a cursor or
a direct query where only one row is expected. The
syntax for the later case is shown below.
</P
><PRE
CLASS="PROGRAMLISTING"
> <query> ::=
'SELECT' <column list>
'INTO' <host variable list>
'WHERE'...... rest of query ......
;
<host variable list> ::=
<variable> [ ['INDICATOR'] <variable>
| <host variable list>
| <empty>
;
<variable> :: = ':' <identifier> ;
</PRE
><P
> The esql handles this statement as a normal SQL statement
but removing the 'INTO' clause from the SQL string which
is sent to the dbcs. The host variables listed in the
<host variable list> are used to store the columns
of the query result.
</P
><PRE
CLASS="PROGRAMLISTING"
> <fetch clause;> ::=
'FETCH' <source;> 'INTO' <host variable list> ;
<source;> := {
<empty>
| 'FROM' <cursor>
| 'USING' [ 'STATEMENT' ] <statementname>
}
</PRE
><P
> Either a cursor name or a statement name (see dynamic sql) may
be given as a source for the fetch command. If the source if
left empty, a unnamed cusrsor will be assumed.
</P
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>ATTENTION: </B
> The unnamed cursor has a global nature, which means there is
only one unnamed cursor which is reallocated for each query.
Any subsequent query with an unnamed cursor will destroy the
previously allocated result sets.
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