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Using ADO with Fujitsu NETCOBOL
Cobol Code Examples
Using ADO with Fujitsu NETCOBOL
by
fredericofonseca
Posted
(Edited
)
Two samples of how to use ADO with NETCOBOL v7 (and probably V6 and V5).
Sample 1 - uses the ADO connection object and recordset object
Opens a connection, executes a simple SQL select.
Once the recordset is available it loops through the fields collection and displays the name and type of fields.
then it loops through the Recordset records and prints each field in the record returned (only type numeric and char).
Sample 2 - Uses the ADO connection object and command object.
Uses each object to create a new table on the Database.
Sample 1 - uses the ADO connection object and recordset object
Opens a connection, executes a simple SQL select.
Once the recordset is available it loops through the fields collection and displays the name and type of fields.
then it loops through the Recordset records and prints each field in the record returned (only type numeric and char).
Code:
IDENTIFICATION DIVISION.
PROGRAM-ID. "ADODEMO".
ENVIRONMENT DIVISION.
CONFIGURATION SECTION.
REPOSITORY.
CLASS COM-EXCEPTION AS "*COM-EXCEPTION"
CLASS COM AS "*COM".
DATA DIVISION.
WORKING-STORAGE SECTION.
01 VARIABLES.
05 ADO-CONNECTION-TYPE PIC X(8192) VALUE "ADODB.Connection".
05 ADO-RECORDSET-TYPE PIC X(8192) VALUE "ADODB.Recordset".
05 ADO-COMMAND-TYPE PIC X(8192) VALUE "ADODB.Command".
05 OBJ-CONNECTION OBJECT REFERENCE COM .
05 OBJ-RECORDSET OBJECT REFERENCE COM.
05 OBJ-COMMAND OBJECT REFERENCE COM.
05 OBJ-FIELD OBJECT REFERENCE COM OCCURS 10.
05 OBJ-FIELDS OBJECT REFERENCE COM.
05 OBJ-FIELDS-COUNT PIC S9(9) COMP-5 VALUE 0.
05 RECORDCOUNT PIC S9(9) COMP-5 VALUE 0.
05 NUMBER-FIELD PIC S9(9)V9(9) VALUE 0.
05 NUMBER-FIELD-EDT PIC -(10).9(9).
05 ALPHA-FIELD PIC X(200).
05 RETURN-ERROR PIC 9(9) COMP-5.
05 WLOCK PIC S9(9) COMP-5 VALUE 1.
05 WCURSOR PIC S9(9) COMP-5 VALUE 1.
05 WOPTION PIC S9(9) COMP-5 VALUE -1.
05 W-INDEX PIC 99.
05 W-INDEX-1 PIC 99.
05 EOF PIC S9(9) COMP-5.
05 BOF PIC S9(9) COMP-5.
05 FIELD-NAME PIC X(25).
05 FIELD-TYPE PIC 9(9) OCCURS 10.
05 ADO-STRING.
10 PIC X(30) VALUE
"DSN=LOCALSERVER;UID=user;".
10 PIC X(30) VALUE
"PWD=password;DATABASE=mydatabase;".
05 ADO-CONNECT-STRING REDEFINES ADO-STRING PIC X(60).
05 ADO-SQL-STRING PIC X(500).
PROCEDURE DIVISION.
MAIN SECTION.
*> CREATE MAIN OBJECTS.
INVOKE COM "CREATE-OBJECT"
USING ADO-CONNECTION-TYPE
RETURNING OBJ-CONNECTION.
INVOKE COM "CREATE-OBJECT"
USING ADO-RECORDSET-TYPE
RETURNING OBJ-RECORDSET.
*> DEFINE AND OPEN CONNECTION
INVOKE OBJ-CONNECTION "SET-CONNECTIONSTRING"
USING ADO-CONNECT-STRING
RETURNING RETURN-ERROR.
INVOKE OBJ-CONNECTION "OPEN"
RETURNING RETURN-ERROR.
*> DEFINE SQL AND EXECUTE IT
STRING "SELECT * FROM PAISES ORDER BY PAIS;"
LOW-VALUE DELIMITED BY SIZE
INTO ADO-SQL-STRING.
INVOKE OBJ-RECORDSET "OPEN"
USING ADO-SQL-STRING
OBJ-CONNECTION
WLOCK
WCURSOR
RETURNING RETURN-ERROR.
*> ASSUMING THE SQL WORKED WE WILL HAVE A FIELDS COLLECTION. GET IT'S OBJECT AND THE COUNT OF ITEMS.
INVOKE OBJ-RECORDSET "GET-FIELDS"
RETURNING OBJ-FIELDS.
INVOKE OBJ-FIELDS "GET-COUNT"
RETURNING OBJ-FIELDS-COUNT.
*> NOW LOAD EACH FIELD OBJECT AND IT'S TYPE.
*> ON REAL LIFE WE CAN BYPASS THE TYPE AS WE WILL NORMALLY KNOW THAT. EXCEPTIONS ARE ON DYNAMIC SQL SOLUTIONS.
PERFORM VARYING W-INDEX
FROM 0 BY 1
UNTIL W-INDEX > (OBJ-FIELDS-COUNT - 1)
INVOKE OBJ-FIELDS "GET-ITEM" USING W-INDEX RETURNING
OBJ-FIELD(W-INDEX + 1)
MOVE SPACES TO FIELD-NAME
MOVE ZEROS TO FIELD-TYPE(W-INDEX + 1)
INVOKE OBJ-FIELD(W-INDEX + 1) "GET-NAME"
RETURNING FIELD-NAME
INVOKE OBJ-FIELD(W-INDEX + 1) "GET-TYPE"
RETURNING FIELD-TYPE(W-INDEX + 1)
DISPLAY "FIELD N. " W-INDEX " NAME=" FIELD-NAME " FIELD TYPE="
FIELD-TYPE (W-INDEX + 1)
END-PERFORM.
INVOKE OBJ-RECORDSET "GET-RECORDCOUNT" RETURNING RECORDCOUNT.
*> AS THE RECORD COUNT PROPERTY ONLY WORKS WITH CERTAIN TYPES OF
CURSORS WE RETRIEVE
*> THE EOF/BOF VALUES ALSO TO DETERMINE IF WE HAVE RECORDS.
INVOKE OBJ-RECORDSET "GET-EOF" RETURNING EOF.
INVOKE OBJ-RECORDSET "GET-BOF" RETURNING BOF.
*> NOW LOAD THE RECORDS UNTIL END OF FILE. DISPLAY ON THIS CASE.
IF RECORDCOUNT NOT < 0
OR (NOT BOF = 0 AND EOF = 0)
PERFORM UNTIL EOF = 1
INVOKE OBJ-RECORDSET "GET-EOF" RETURNING EOF
IF EOF = 0
PERFORM VARYING W-INDEX
FROM 1 BY 1
UNTIL W-INDEX > OBJ-FIELDS-COUNT
EVALUATE FIELD-TYPE(W-INDEX)
WHEN 131 *> Numeric
INVOKE OBJ-FIELD(W-INDEX) "GET-VALUE"
RETURNING NUMBER-FIELD
MOVE NUMBER-FIELD TO NUMBER-FIELD-EDT
DISPLAY "FIELD " W-INDEX " VALUE = "
NUMBER-FIELD-EDT
WHEN 129 *> CHAR
INVOKE OBJ-FIELD(W-INDEX) "GET-VALUE"
RETURNING ALPHA-FIELD
DISPLAY "FIELD " W-INDEX " VALUE = "
ALPHA-FIELD (1:50)
END-EVALUATE
END-PERFORM
INVOKE OBJ-RECORDSET "MOVENEXT" RETURNING RETURN-ERROR
END-IF
END-PERFORM
END-IF.Sample 2 - Uses the ADO connection object and command object.
Uses each object to create a new table on the Database.
Code:
IDENTIFICATION DIVISION.
PROGRAM-ID. "ADODEMO1".
ENVIRONMENT DIVISION.
CONFIGURATION SECTION.
REPOSITORY.
CLASS COM-EXCEPTION AS "*COM-EXCEPTION"
CLASS COM AS "*COM".
DATA DIVISION.
WORKING-STORAGE SECTION.
01 VARIABLES.
05 ADO-CONNECTION-TYPE PIC X(8192) VALUE "ADODB.Connection".
05 ADO-COMMAND-TYPE PIC X(8192) VALUE "ADODB.COMMAND".
05 OBJ-CONNECTION OBJECT REFERENCE COM .
05 OBJ-COMMAND OBJECT REFERENCE COM.
05 RETURN-ERROR PIC 9(9) COMP-5.
05 ZERO-RECORDS PIC 9(9) COMP-5.
05 ADO-SQL-CMDTEXT PIC 9(9) COMP-5 VALUE 1.
05 ADO-STRING.
10 PIC X(30) VALUE
"DSN=LOCALSERVER;UID=user;".
10 PIC X(30) VALUE
"PWD=password;DATABASE=mydatabase;".
05 ADO-CONNECT-STRING REDEFINES ADO-STRING PIC X(60).
05 ADO-SQL-STRING PIC X(500).
PROCEDURE DIVISION.
MAIN SECTION.
*> CREATE MAIN OBJECTS.
INVOKE COM "CREATE-OBJECT"
USING ADO-CONNECTION-TYPE
RETURNING OBJ-CONNECTION.
INVOKE COM "CREATE-OBJECT"
USING ADO-COMMAND-TYPE
RETURNING OBJ-COMMAND.
*> DEFINE AND OPEN CONNECTION
INVOKE OBJ-CONNECTION "SET-CONNECTIONSTRING"
USING ADO-CONNECT-STRING
RETURNING RETURN-ERROR.
INVOKE OBJ-CONNECTION "OPEN"
RETURNING RETURN-ERROR.
*> Create a table using the connection object
STRING "CREATE TABLE DEMO2 (DEMO CHAR)"
LOW-VALUE DELIMITED BY SIZE
INTO ADO-SQL-STRING.
INVOKE OBJ-CONNECTION "EXECUTE"
USING ADO-SQL-STRING
ZERO-RECORDS
*> Create a table using the command object
STRING "CREATE TABLE DEMO3 (DEMO CHAR)"
LOW-VALUE DELIMITED BY SIZE
INTO ADO-SQL-STRING.
INVOKE OBJ-COMMAND "SET-ACTIVECONNECTION"
USING OBJ-CONNECTION
INVOKE OBJ-COMMAND "SET-COMMANDTYPE"
USING ADO-SQL-CMDTEXT
INVOKE OBJ-COMMAND "SET-COMMANDTEXT"
USING ADO-SQL-STRING
INVOKE OBJ-COMMAND "EXECUTE"
USING ZERO-RECORDS.
Please Note: 1 is Bad, 10 is Good :-)
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