Printing the value of a variable in SQL Developer

问题:

I wanted to print the value of a particular variable which is inside an anonymous block. I am using Oracle SQL Developer. I tried using dbms_output.put_line. But it is not working. The code which I am using is shown below.

SET SERVEROUTPUT ON  DECLARE    CTABLE USER_OBJECTS.OBJECT_NAME%TYPE;   CCOLUMN ALL_TAB_COLS.COLUMN_NAME%TYPE;   V_ALL_COLS VARCHAR2(500);    CURSOR CURSOR_TABLE     IS     SELECT OBJECT_NAME      FROM USER_OBJECTS      WHERE OBJECT_TYPE='TABLE'     AND OBJECT_NAME LIKE 'tb_prm_%';    CURSOR CURSOR_COLUMNS (V_TABLE_NAME IN VARCHAR2)     IS     SELECT COLUMN_NAME     FROM ALL_TAB_COLS     WHERE TABLE_NAME = V_TABLE_NAME;  BEGIN    OPEN CURSOR_TABLE;    LOOP     FETCH CURSOR_TABLE INTO CTABLE;     EXIT WHEN CURSOR_TABLE%NOTFOUND;      OPEN CURSOR_COLUMNS (CTABLE);      V_ALL_COLS := NULL;      LOOP       FETCH CURSOR_COLUMNS INTO CCOLUMN;       V_ALL_COLS := V_ALL_COLS || CCOLUMN;       IF CURSOR_COLUMNS%FOUND THEN         V_ALL_COLS := V_ALL_COLS || ', ';       ELSE         EXIT;       END IF;     END LOOP;      DBMS_OUTPUT.PUT_LINE(V_ALL_COLS);    END LOOP;   CLOSE CURSOR_TABLE;  END; 

And I am getting the output only as anonymous block completed.

回答1:

You need to turn on dbms_output. In Oracle SQL Developer:

1. Show the DBMS Output window (View->DBMS Output).
2. Press the "+" button at the top of the Dbms Output window and then select an open database connection in the dialog that opens.

In SQL*Plus:

 SET SERVEROUTPUT ON 

回答2:

SQL Developer seems to only output the DBMS_OUTPUT text when you have explicitly turned on the DBMS_OUTPUT window pane.

Go to (Menu) VIEW -> Dbms_output to invoke the pane.

Click on the Green Plus sign to enable output for your connection and then run the code.

EDIT: Don't forget to set the buffer size according to the amount of output you are expecting.

回答3:

Make server output on First of all

1. SET SERVEROUTPUT on then

2. Go to the DBMS Output window (View->DBMS Output)

3. then Press Ctrl+N for connecting server

回答4:

There is another option :

set serveroutput on format wraped; 

or

Open the 'view' menu and click on 'dbms output'. You should get a dbms output window at the bottom of the worksheet. You then need to add the connection (for some reason this is not done automaticallly).

回答5:

select View-->DBMS Output in menu and

回答6:

Go to the DBMS Output window (View->DBMS Output).

回答7:

DECLARE    CTABLE USER_OBJECTS.OBJECT_NAME%TYPE;   CCOLUMN ALL_TAB_COLS.COLUMN_NAME%TYPE;   V_ALL_COLS VARCHAR2(5000);    CURSOR CURSOR_TABLE     IS     SELECT OBJECT_NAME      FROM USER_OBJECTS      WHERE OBJECT_TYPE='TABLE'     AND OBJECT_NAME LIKE 'STG%';    CURSOR CURSOR_COLUMNS (V_TABLE_NAME IN VARCHAR2)     IS     SELECT COLUMN_NAME     FROM ALL_TAB_COLS     WHERE TABLE_NAME = V_TABLE_NAME;  BEGIN    OPEN CURSOR_TABLE;   LOOP     FETCH CURSOR_TABLE INTO CTABLE;      OPEN CURSOR_COLUMNS (CTABLE);     V_ALL_COLS := NULL;     LOOP        FETCH CURSOR_COLUMNS INTO CCOLUMN;       V_ALL_COLS := V_ALL_COLS || CCOLUMN;       IF CURSOR_COLUMNS%FOUND THEN         V_ALL_COLS := V_ALL_COLS || ', ';       ELSE         EXIT;       END IF;     END LOOP;    close CURSOR_COLUMNS ;     DBMS_OUTPUT.PUT_LINE(V_ALL_COLS);     EXIT WHEN CURSOR_TABLE%NOTFOUND;   END LOOP;`enter code here`   CLOSE CURSOR_TABLE;  END; 

I have added Close of second cursor. It working and getting output as well...

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