Natural for OpenVMS Version 6.3.12 for OpenVMS
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READ RESULT SET - SQL

Common Set Syntax:

READ [(limit)] RESULT SET result-set INTO

VIEW view-name
parameter

FROM ddm-name
   [GIVING [:] sql-code]
END-RESULT (structured mode only)      
LOOP (reporting mode only)      

Extended Set Syntax:

READ [(limit)] RESULT SET result-set INTO

VIEW view-name
parameter

FROM ddm-name
    [WITH INSENSITIVE SCROLL [:] scroll-hv]
   [GIVING [:] sql-code]
END-RESULT (structured mode only)      
LOOP (reporting mode only)      

This document covers the following topics:

For an explanation of the symbols used in the syntax diagram, see Syntax Symbols.

Belongs to Function Group: Database Access and Update


Function

The SQL statement READ RESULT SET can only be used in conjunction with a CALLDBPROC statement. It is used to read a result set which was created by a stored procedure that was invoked by a previous CALLDBPROC statement.

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Syntax Description

Syntax Element Description
limit
Limit Option:

You can limit the number of rows to be read. You can specify the limit either as a numeric constant (0 - 4294967295) or as a variable of format N, P or I.

result-set
Result Set:

As result-set you specify a result-set locator variable filled by a preceding CALLDBPROC statement. result-set has to be a variable of format/length I4.

Note:
If a syncpoint operation takes place between the CALLDBPROC statement and the READ RESULT SET statement, the result sets can no longer be accessed by the READ RESULT SET statement.

INTO
INTO Clause:

The INTO clause is used to specify the target fields in the program which are to be filled with the result set.

The INTO clause can specify either single parameters or one or more views as defined in the DEFINE DATA statement.

VIEW view-name
VIEW Clause:

view-name specifies a view whose fields receive the columns of the result set created by the stored procedure invoked via the CALLDBPROC statement.

The number of columns of the result set must correspond to the number of fields defined in the view (not counting group fields, redefining fields and indicator fields).

parameter
Parameter:

parameter specifies a field which receives a column of the result set created by the stored procedure invoked via the CALLDBPROC statement.

FROM ddm-name
DDM Name:

As ddm-name you specify the name of the data definition module (DDM) which is used to "address" the database executing the stored procedure.

For further information, see ddm-name.

WITH INSENSITIVE SCROLL [:] scroll_hv
WITH INSENSITIVE SCROLL Clause:

This clause belongs to the SQL Extended Set.

This clause is not currently supported. When used, it will cause a compiler error.

GIVING sqlcode
GIVING sqlcode Clause:

This clause may be used to obtain the SQL code of the SQL "fetch" operation used to process the result set.

If this clause is specified and the SQL code of the SQL operation is not 0, no Natural error message will be issued. In this case, the action to be taken in reaction to the SQL code value has to be coded in the invoking Natural object.

The sqlcode field has to be a variable of format/length I4.

If the GIVING sqlcode clause is omitted, a Natural error message will be issued if the SQL code is not 0.

END-RESULT
End of READ RESULT SET Statement:

In structured mode, the Natural reserved keyword END-RESULT must be used to end the READ RESULT SET statement.

In reporting mode, the Natural statement LOOP must be used to end the READ RESULT SET statement.

LOOP

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