OpenEdge Data Management: DataServer for Microsoft SQL Server

Chapter 3: RDBMS Stored Procedure Details
The data type associated with each column follows the mapping rules that exist
between OpenEdge and the foreign data source’s data types. For more information
about data types and default mapping, see Chapter 2, “Initial Programming
Considerations.”
Note: Since a stored procedure can return multiple result sets, the DataServer
prepares the temp-table as “result” where is the result-set sequence
number that corresponds to its element position in the temp table handle array,
starting with 1. Therefore, if there are 3 result sets and 3 clear dynamic
temp-tables are passed, the temp-tables are called result1, result2, and
result3.
Note the following error conditions as they specifically apply to a dynamic temp-table:
• If an error occurs during the schema population or during the prepare of a
temp-table, the DataServer raises an error condition.
• The dynamic temp-table must be either already prepared or clear with no defined
fields in it. If fields have already been added to a dynamic temp-table before the
RUN STORED-PROC statement is executed and the temp-table is not prepared, the
DataSever raises an error condition due to the invalid state of the temp-table.
Details about a dynamic temp-table in a prepared state
Example 14 shows multiple dynamic temp-tables in a prepared state. The temp tables,
tt1 and tt2, are prepared in the code just before the RUN STORED-PROC statement is
called and the temp-tables are passed. The temp-table definition is considered
prepared because of the explicit inclusion of each field name and associated data type.
/* example - Multiple dynamic temp-tables in a prepared state*/
DEFINE VARIABLE tt1 AS HANDLE NO-UNDO.
DEFINE VARIABLE tt2 AS HANDLE NO-UNDO.
DEFINE VARIABLE tt-array AS HANDLE NO-UNDO EXTENT 2.
CREATE TEMP-TABLE tt1.
tt1:ADD-NEW-FIELD(“custnum”, “integer”).
tt1:ADD-NEW-FIELD(“name”, “character”).
/*no more fields will be added */
tt1:TEMP-TABLE-PREPARE (“ordx1”).
CREATE TEMP-TABLE tt2.
tt2:ADD-NEW-FIELD(“ordernum”, “integer”).
tt2:ADD-NEW-FIELD(“orderdate”, “date”).
/*no more fields will be added */
tt2:TEMP-TABLE-PREPARE (“ordx2”).
ASSIGN
tt-array[1] = tt1
tt-array[2] = tt2.
RUN STORED-PROC myproc LOAD-RESULT-INTO tt-array (INPUT 10, INPUT “order”).
Example 14: Multiple temp-tables in a prepared state
In the previous dynamic temp-table example, note that the temp-table definitions must
match the result set that the send-sql- statement returns. For example, the number of
fields and the data type of each field in the result must have a corresponding field
146 OpenEdge Data Management: DataServer for Microsoft SQL Server