![set pgadmin 4 query result to unlimited set pgadmin 4 query result to unlimited](https://www.pgadmin.org/static/docs/pgadmin4-dev/docs/en_US/_build/html/_images/new_connection_options.png)
You should declare the actual for this parameter as VARCHAR2 (32767) to avoid the risk of " ORA-06502: PL/SQL: numeric or value error: character string buffer too small". Returns a single line of buffered information, excluding a final newline character. Table 99-4 GET_LINE Procedure Parameters Parameter Line.operation || ' ' || line.options || ' ' || LEVEL determines indention level.ĭBMS_OUTPUT.PUT_LINE (lpad(' ',2*(line.level-1)) || || ', estimated cost = ' || line.position) At start of output, include heading with estimated cost.ĭBMS_OUTPUT.PUT_LINE ('Plan for statement ' Loop through information retrieved from PLAN_TABLE:
![set pgadmin 4 query result to unlimited set pgadmin 4 query result to unlimited](https://dataedo.com/asset/img/kb/db-tools/pgadmin/pgadmin_table_comment.png)
WHERE statement_id = explain_out.statement_idĪND statement_id = explain_out.statement_id SELECT level, id, position, operation, options, Retrieve information from PLAN_TABLE into cursor EXPLAIN_ROWS. * to procedure, to uniquely identify statement. The example EXPLAIN_OUT procedure retrieves the information from this table and formats the output in a nested manner that more closely depicts the order of steps undergone in processing the SQL statement. The user has also assigned a statement ID to this statement.
![set pgadmin 4 query result to unlimited set pgadmin 4 query result to unlimited](https://www.pgadmin.org/static/docs/pgadmin4-dev/docs/en_US/_build/html/_images/query_explain_analyze_table.png)
In this example, the user has used the EXPLAIN PLAN command to retrieve information about the execution plan for a statement and has stored it in PLAN_TABLE. The user would then see the following information displayed in the output pane: Loop number = 1 Wages = 2000Įxample 3: Retrieving Information About an Object
![set pgadmin 4 query result to unlimited set pgadmin 4 query result to unlimited](https://1.bp.blogspot.com/-0KInBNFcqEc/XlG4uG9PKKI/AAAAAAAAddQ/ZcrssRt_KMMbAL1nEMQo8dac95xqbCSJwCLcBGAsYHQ/s1600/Untitled735.png)
' Wages = '|| TO_CHAR(total_wages)) /* Debug line */Ĭounter := counter + 1 /* Increment debug counter */Īssume the EMP table contains the following rows: EMPNO SAL COMM DEPTĪssume the user executes the following statements in SQL*Plus: SET SERVEROUTPUT ON Total_wages := total_wages + emp_record.salĭBMS_OUTPUT.PUT_LINE('Loop number = ' || counter || SELECT sal, comm FROM emp WHERE deptno = dnum Įmp_m := NVL(emp_m, 0) The function includes several calls to the PUT_LINE procedure: CREATE FUNCTION dept_salary (dnum NUMBER) RETURN NUMBER IS This function queries the employee table and returns the total salary for a specified department. This package can also be used to enable you to retrieve information about an object and format this output, as shown in "Example 3: Retrieving Information About an Object". The DBMS_OUTPUT package is commonly used to debug stored procedures and triggers. For better performance, you should use calls to GET_LINES Procedure which can return an array of lines.Įxample 2: Debugging Stored Procedures and Triggers You repeat calls to GET_LINE until status comes back as nonzero. You could then optionally display the buffer on the screen.
Set pgadmin 4 query result to unlimited update#
If you have enabled the DBMS_OUTPUT package, then the text produced by this PUT_LINE would be buffered, and you could, after executing the statement (presumably some INSERT, DELETE, or UPDATE that caused the trigger to fire), retrieve the line of information.
Set pgadmin 4 query result to unlimited code#
For example, you could code the trigger to invoke: DBMS_OUTPUT.PUT_LINE('I got here:'||:new.col||' is the new value') You can use a trigger to print out some output from the debugging process. The minimum size is 2000 bytes and the maximum is unlimited.Įxample 1: Using a Trigger to Produce Output You should generally avoid having application code invoke either the DISABLE Procedure or ENABLE Procedure because this could subvert the attempt of an external tool like SQL*Plus to control whether or not to display output. Typing SET SERVEROUTPUT ON in SQL*Plus has the effect of invoking DBMS_OUTPUT.ENABLE (buffer_size => NULL) SQL*Plus calls GET_LINES after issuing a SQL statement or anonymous PL/SQL calls. If you do not call GET_LINE, or if you do not display the messages on your screen in SQL*Plus, the buffered messages are ignored. This creates the public synonym DBMS_OUTPUT, and EXECUTE permission on this package is granted to public. The dbmsotpt.sql script must be run as user SYS. In this way, you can design your application so that subprograms are available only when a client is able to process the information. If the package is disabled, all calls to subprograms are ignored. In a separate PL/SQL procedure or anonymous block, you can display the buffered information by calling the GET_LINE Procedure and GET_LINES Procedure. The PUT Procedure and PUT_LINE Procedure in this package enable you to place information in a buffer that can be read by another trigger, procedure, or package. The package is typically used for debugging, or for displaying messages and reports to SQL*DBA or SQL*Plus (such as are produced by applying the SQL command DESCRIBE to procedures). This section contains topics which relate to using the DBMS_OUTPUT package.