DOCUMENT:Q239771 20-JUL-2000 [foxpro] TITLE :HOWTO: Return Oracle Stored Procedure Resultset to ADO Recordset PRODUCT :Microsoft FoxPro PROD/VER:WINDOWS:6.0 OPER/SYS: KEYWORDS:kbADO kbADO200 kbADO201 kbDatabase kbODBC kbOracle kbvfp600 KbDBFDBC kbGrpDSFox kbDSupp ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual FoxPro for Windows, version 6.0 ------------------------------------------------------------------------------- SUMMARY ======= This article illustrates how use the Microsoft ODBC Driver for Oracle version 2.0 and later with an Oracle PL/SQL package to return resultsets from an Oracle stored procedure to an ADO recordset. MORE INFORMATION ================ With the release of the Microsoft ODBC Driver for Oracle version 2.0 and higher, it is possible to retrieve resultsets from Oracle stored procedures. By creating Oracle stored procedures that return parameters of type TABLE, row, and column, data can be returned that can then be manipulated and displayed as a resultset. The resultsets created by the Microsoft ODBC Driver for Oracle version 2.0 and 2.5 using Oracle stored procedures are READ ONLY and Static. Retrieving a resultset requires the creation of an Oracle Package. Before beginning to work with the Visual FoxPro application, an Oracle package called FoxPackage must be created. FoxPackage is taken from the Help File for Microsoft ODBC Driver for Oracle: Advanced Topics: "Returning Array Parameters from Stored Procedures". NOTE: The following code requires installation of Microsoft Data Access Components (MDAC) version 2.x or later. MDAC is included in the data components of Visual Studio 6.0 or can be downloaded from the following Web site: http://www.microsoft.com/data/ 1. Create a program file named Procs.prg using the code snippet below. This code will be used to create an Oracle package definition and package body: *!* Step 1 Create the package definition string Proc_String1="CREATE OR REPLACE PACKAGE FoxPackage AS " + CHR(13) + ; CHR(10) + ; " TYPE t_id is TABLE of NUMBER(5) " + CHR(13) + CHR(10) + ; " INDEX BY BINARY_INTEGER; " + CHR(13) + CHR(10) + ; " TYPE t_Course is TABLE of VARCHAR2(10) " + CHR(13) + CHR(10) + ; " INDEX BY BINARY_INTEGER; " + CHR(13) + CHR(10) + ; " TYPE t_Dept is TABLE of VARCHAR2(5) " + CHR(13) + CHR(10) + ; " INDEX BY BINARY_INTEGER; " + CHR(13) + CHR(10) + ; " TYPE t_pk1Type1 IS TABLE OF VARCHAR2(100) " + CHR(13) + CHR(10) + ; " INDEX BY BINARY_INTEGER; " + CHR(13) + CHR(10) + ; " TYPE t_pk1Type2 IS TABLE OF NUMBER(5) " + CHR(13) + CHR(10) + ; " INDEX BY BINARY_INTEGER; " + CHR(13) + CHR(10) + ; " PROCEDURE proc1 " + CHR(13) + CHR(10) + ; " ( o_id OUT t_id, " + CHR(13) + CHR(10) + ; " ao_course OUT t_Course, " + CHR(13) + CHR(10) + ; " ao_dept OUT t_Dept " + CHR(13) + CHR(10) + ; " ); " + CHR(13) + CHR(10) + ; " PROCEDURE proc2 " + CHR(13) + CHR(10) + ; " ( " + CHR(13) + CHR(10) + ; " i_Arg1 IN NUMBER, " + CHR(13) + CHR(10) + ; " ao_Arg2 OUT t_pk1Type1, " + CHR(13) + CHR(10) + ; " ao_Arg3 OUT t_pk1Type2 " + CHR(13) + CHR(10) + ; " ); " + CHR(13) + CHR(10) + ; " END FoxPackage; " *!* Step 2 Create the package body string Proc_String2="CREATE OR REPLACE PACKAGE BODY FoxPackage AS " + CHR(13) + ; CHR(10) + " PROCEDURE proc1 " + CHR(13) + CHR(10) + ; " ( " + CHR(13) + CHR(10) + ; " o_id OUT t_id, " + CHR(13) + CHR(10) + ; " ao_course OUT t_Course, " + CHR(13) + CHR(10) + ; " ao_dept OUT t_Dept " + CHR(13) + CHR(10) + ; " ) " + CHR(13) + CHR(10) + ; " AS " + CHR(13) + CHR(10) + ; " BEGIN " + CHR(13) + CHR(10) + ; " o_id(1):= 200; " + CHR(13) + CHR(10) + ; " ao_course(1) := 'M101'; " + CHR(13) + CHR(10) + ; " ao_dept(1) := 'EEE' ; " + CHR(13) + CHR(10) + ; " o_id(2) := 201; " + CHR(13) + CHR(10) + ; " ao_course(2) := 'PHY320'; " + CHR(13) + CHR(10) + ; " ao_dept(2) := 'ECE' ; " + CHR(13) + CHR(10) + ; " END proc1; " + CHR(13) + CHR(10) + ; " PROCEDURE proc2 " + CHR(13) + CHR(10) + ; " ( " + CHR(13) + CHR(10) + ; " i_Arg1 IN NUMBER, " + CHR(13) + CHR(10) + ; " ao_Arg2 OUT t_pk1Type1, " + CHR(13) + CHR(10) + ; " ao_Arg3 OUT t_pk1Type2 " + CHR(13) + CHR(10) + ; " ) " + CHR(13) + CHR(10) + ; " AS " + CHR(13) + CHR(10) + ; " i NUMBER; " + CHR(13) + CHR(10) + ; " BEGIN " + CHR(13) + CHR(10) + ; " FOR i IN 1 .. i_Arg1 LOOP " + CHR(13) + CHR(10) + ; " ao_Arg2(i) := 'Row Number ' || to_char(i); " + CHR(13) + ; CHR(10) + ; " END LOOP; " + CHR(13) + CHR(10) + ; " FOR i IN 1 .. i_Arg1 LOOP " + CHR(13) + CHR(10) + ; " ao_Arg3(i) := i; " + CHR(13) + CHR(10) + ; " END LOOP; " + CHR(13) + CHR(10) + ; " END proc2; " + CHR(13) + CHR(10) + ; " END FoxPackage; " *!* Note that the Server name, User ID, and Passwords in the following *!* SQLSTRINGCONNECT should be changed to reflect the environment. gnConnHandle=SQLSTRINGCONN('DRIVER={Microsoft ODBC for Oracle};' + ; 'SERVER=MyServer;UID=MyUserID;PWD=MyPassword') IF gnConnHandle>0 Create_Pack=SQLEXEC(gnConnHandle,Proc_String1) IF Create_Pack>0 Create_Body=SQLEXEC(gnConnHandle,Proc_String2) ENDIF =SQLDISCONN(gnConnHandle) ENDIF 2. Create a second program named Execado.prg using the code snippet below. This program will be used later to call the Oracle package: PARAMETER var1, var2 PUBLIC oConnection,rs1,rs2,rs3,rs4,is_add LOCAL lcConnStr,lcAlias LOCAL Proc_String1,Proc_String2,Proc_String3,Proc_String4 *!* Setup a DSN-Less connection to Sample Data Files *!* Note that the Server name, User ID, and Passwords in the following *!* string should be changed to reflect the environment. lcConnStr="DRIVER={Microsoft ODBC for Oracle};" + ; "SERVER=MyServer;" + ; "UID=MyUserID;PWD=MyPassword" *!* Create An ADO Connection oConnection=CREATEOBJECT("ADODB.Connection") oConnection.ConnectionString = lcConnStr oConnection.CursorLocation = 3 && Server Side Cursor oConnection.OPEN *!* Build strings that will be used to call the Oracle Package Proc_String1 = "{call FoxPackage.Proc1({resultset 3, o_id , " + ; "ao_course, ao_dept})}" Proc_String2 = "{call FoxPackage.Proc1({resultset 3, o_id}, " + ; "{resultset 3, ao_course}, {resultset 3, ao_dept})}" Proc_String3 = "{call FoxPackage.Proc2(" + ALLTRIM(STR(var1)) + ; ",{resultset 3, ao_Arg2, ao_Arg3})}" Proc_String4 = "{call FoxPackage.Proc2(" + ALLTRIM(STR(var2)) + ; ",{resultset 3, ao_Arg2}, {resultset 3, ao_Arg3})}" *!* Create An ADO recordset for the first resultset returned from Package Proc1 rs1=CREATEOBJECT("ADODB.Recordset") rs1.activeconnection = oConnection rs1.CursorLocation = 3 && Client Side Cursor rs1.cursortype = 1 && OpenKeyset rs1.LockType = 3 && LockOptimistic rs1.OPEN(Proc_String1) rs1.movefirst *!* Create An ADO recordset for the second resultset returned from Package Proc1 rs2=CREATEOBJECT("ADODB.Recordset") rs2.activeconnection = oConnection rs2.CursorLocation = 3 && Client Side Cursor rs2.cursortype = 1 && OpenKeyset rs2.LockType = 3 && LockOptimistic rs2.OPEN(Proc_String2) rs2.movefirst *!* Create An ADO recordset for the first resultset returned from Package Proc2 rs3=CREATEOBJECT("ADODB.Recordset") rs3.activeconnection = oConnection rs3.CursorLocation = 3 && Client Side Cursor rs3.cursortype = 1 && OpenKeyset rs3.LockType = 3 && LockOptimistic rs3.OPEN(Proc_String3) rs3.movefirst *!* Create An ADO recordset for the second resultset returned from Package Proc2 rs4=CREATEOBJECT("ADODB.Recordset") rs4.activeconnection = oConnection rs4.CursorLocation = 3 && Client Side Cursor rs4.cursortype = 1 && OpenKeyset rs4.LockType = 3 && LockOptimistic rs4.OPEN(Proc_String4) rs4.movefirst *!* Navigate through the first ADO Recordset ? "Resultset 1" DO WHILE !rs1.EOF() FOR i=0 TO rs1.FIELDS.COUNT-1 ? rs1.FIELDS(i).VALUE NEXT rs1.movenext ENDDO *!* Navigate through the second ADO Recordset ? "Resultset 2" DO WHILE !rs2.EOF() FOR i=0 TO rs2.FIELDS.COUNT-1 ? rs2.FIELDS(i).VALUE NEXT rs2.movenext ENDDO *!* Navigate through the third ADO Recordset ? "Resultset 3" DO WHILE !rs3.EOF() FOR i=0 TO rs3.FIELDS.COUNT-1 ? rs3.FIELDS(i).VALUE NEXT rs3.movenext ENDDO *!* Navigate through the fourth ADO Recordset ? "Resultset 4" DO WHILE !rs4.EOF() FOR i=0 TO rs4.FIELDS.COUNT-1 ? rs4.FIELDS(i).VALUE NEXT rs4.movenext ENDDO *!* Done with the ADO Recordsets, so close rs1.CLOSE rs2.CLOSE rs3.CLOSE rs4.CLOSE *!* Done with the ADO Connection, so close oConnection.CLOSE 3. Run the Procs.prg program file to create the Oracle package. 4. After the Procs procedure finishes executing, run the Execado program from the command line, using the following syntax: DO Execado WITH 3,3 5. Note that four different resultsets are returned to the FoxPro desktop. REFERENCES ========== For additional information about returning resultsets from Oracle stored procedures, please click the article numbers below to view the articles in the Microsoft Knowledge Base: Q174679 HOWTO: Retrieve Resultsets from Oracle Stored Procedures Q149882 HOWTO: Execute a Stored Procedure on an Oracle Server (c) Microsoft Corporation 1999, All Rights Reserved. Contributions by John Desch, Microsoft Corporation Additional query words: ====================================================================== Keywords : kbADO kbADO200 kbADO201 kbDatabase kbODBC kbOracle kbvfp600 KbDBFDBC kbGrpDSFox kbDSupport Technology : kbVFPsearch kbAudDeveloper kbVFP600 Version : WINDOWS:6.0 Issue type : kbhowto ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. 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