Datatypes have been automatically chosen for the table columns that will allow you to store numbers and characters. Home | Articles | Scripts | Blog | Certification | Misc | About About Tim Hall Copyright & Disclaimer Oracle Country Country Communities I am a... Given this, we will now create an error log table for TGT and provide a friendly name of our own. The DBMS_ERRLOG Package This package, described in Chapter 38 of Oracle® Database PL/SQL Packages and Types Reference, 10g Release 2 (10.2) employs a security model. http://darrenmanning.com/error-log/dml-error-logging.html
This increase in volume is what we would see if we turned bulk inserts into row-by-row inserts. forall comparison: runstats output Both examples loaded the same number of records. Elapsed: 00:00:07.00 SQL> exec snap_my_stats.end_snap; --------------------------------- Session stats - 04-Dec 12:57:32 Interval:- 43 seconds --------------------------------- Name Value ---- ----- opened cursors cumulative 178 user calls 12 recursive calls 2,496 recursive cpu creating the error log table DML error logging works on the principle of trapping exceptions in bulk SQL statements and re-directing the "bad data" to an error table. https://oracle-base.com/articles/10g/dml-error-logging-10gr2
Back to the Top. 11 comments, read/add them... Going back to SQL*Plus, I installed the view and package from Jonathan's code and ran the tests again, but this time snapshotting the stats to see if clues suggested themselves: SQL> Subscribe to Rittman Mead Get the latest posts delivered right to your inbox. source codeThe source code for the examples in this article can be downloaded from here.Adrian Billington, August 2005Back to Top oracle-developer.net 2002-2016 copyright © Adrian Billington all rights reserved | original
This is where the ORA_ERR_TAG$ field and the "simple expression" in the error logging clause come into their own.In the listing below, I've used DBMS_RANDOM to randomize the values used For a general overview of the DML error logging feature, read this oracle-developer.net article. Type --------------------------------- -------- -------------- ORA_ERR_NUMBER$ NUMBER ORA_ERR_MESG$ VARCHAR2(2000) ORA_ERR_ROWID$ ROWID ORA_ERR_OPTYP$ VARCHAR2(2) ORA_ERR_TAG$ VARCHAR2(2000) ID VARCHAR2(4000) CODE VARCHAR2(4000) DESCRIPTION VARCHAR2(4000) SQL> Insert When we built the sample schema we noted that Oracle Log Errors 11g Anyway, for the article I put a set of examples together, where I used the data in the SH.SALES table to create a "source table" copy in a new schema, created
We will return to the original volume of 50,000 records and run a series of failed inserts as follows: invalid datatype; invalid date (check constraint violation); invalid value (check constraint violation); SQL> UPDATE src 2 SET n1 = CASE MOD(ROWNUM,3) 3 WHEN 0 4 THEN NULL -- 5033 rows updated. This is a critical restriction and one that will deter many developers from using the feature. http://www.oracle.com/technetwork/testcontent/o26performance-096310.html COLUMN ora_err_mesg$ FORMAT A70 SELECT ora_err_number$, ora_err_mesg$ FROM err$_dest WHERE ora_err_tag$ = 'MERGE'; ORA_ERR_NUMBER$ ORA_ERR_MESG$ --------------- --------------------------------------------------------- 1400 ORA-01400: cannot insert NULL into ("TEST"."DEST"."CODE") 1400 ORA-01400: cannot insert NULL into ("TEST"."DEST"."CODE")
We can look further at this "factor of four" using a larger dataset. Oracle Dml Error Logging 11gr2 Note: If the statement exceeds the reject limit and rolls back, the error logging table retains the log entries recorded so far. 4. SQL> INSERT /*+ APPEND */ INTO tgt 2 SELECT * FROM src 3 LOG ERRORS INTO tgt_errors ('INSERT..SELECT..DIRECT..ORA-00001') 4 REJECT LIMIT UNLIMITED; INSERT /*+ APPEND */ INTO tgt * ERROR at Sample Schema This following code creates and populates the tables necessary to run the example code in this article. -- Create and populate a source table.
Type ----------------------------------------- -------- ---------------------------- SALES_ID NUMBER PROD_ID NOT NULL NUMBER CUST_ID NOT NULL NUMBER CHANNEL_ID NOT NULL NUMBER TIME_ID NOT NULL DATE PROMO_ID NOT NULL NUMBER AMOUNT_SOLD NOT NULL NUMBER(10,2) QUANTITY_SOLD Type ------------------- ---- ------------- ORA_ERR_NUMBER$ NUMBER ORA_ERR_MESG$ VARCHAR2(2000) ORA_ERR_ROWID$ ROWID ORA_ERR_OPTYP$ VARCHAR2(2) ORA_ERR_TAG$ VARCHAR2(2000) SALES_ID VARCHAR2(4000) CUST_ID VARCHAR2(4000) PROD_ID VARCHAR2(4000) CHANNEL_ID VARCHAR2(4000) TIME_ID VARCHAR2(4000) PROMO_ID VARCHAR2(4000) AMOUNT_SOLD VARCHAR2(4000) QUANTITY_SOLD VARCHAR2(4000) Note Dml Error Logging In Oracle 11g I passed the article out for review to Tim Hall, Doug Burns and Tom Kyte as this was the first "server tech" article I'd written for Oracle Magazine, and I thought Oracle Error Log Table 11g SAVE EXCEPTIONS method.
Check error logging table for errors. http://darrenmanning.com/error-log/dml-error-logging-table-oracle.html SQL> CREATE TABLE src 2 NOLOGGING 3 AS 4 SELECT ROWNUM AS n1 5 , created AS d1 6 , 'X' AS v1 7 , RPAD('x',100) AS v2 8 FROM dba_objects; SQL> INSERT /*+ APPEND */ INTO tgt 2 SELECT src.* 3 FROM src, (SELECT NULL FROM dual CONNECT BY ROWNUM <= 10) multi; 503320 rows created. It has long been a fact that n rows inserted in bulk will generate less redo that n rows inserted one-by-one. Oracle Merge Log Errors Example
AS SELECT statement that copies across these column properties when you are creating a table. Elapsed: 00:00:05.03 SQL> alter table sales_target 2 modify promo_id not null 3 / Table altered. They are run on different servers, so don't compare version-to-version. http://darrenmanning.com/error-log/dml-error-logging-restrictions.html This time we will use Tom Kyte's RUNSTATS utility to report the differences in the resource costs between the two statements.
SQL> SELECT COUNT(*) FROM src; COUNT(*) ---------- 50332 1 row selected. Error Logging In Oracle Stored Procedure SQL> UPDATE sales_src 2 SET promo_id = null 3 WHERE sales_id BETWEEN 5000 and 5005 4 ; 6 rows updated. Needed to 5 * enable LIMIT-based fetching... 6 */ 7 CURSOR cur IS 8 SELECT * 9 FROM src; 10 11 TYPE aat IS TABLE OF cur%ROWTYPE 12 INDEX BY PLS_INTEGER;
Some of the packages input parameters can be null, and the only mandatory input parameter is the name of the DML (or target) table. If we set an explicit reject limit and exceed it, the entire statement fails but n+1 errors are still logged (where n is the reject limit). VARCHAR2(4000) is pretty much the default datatype you should use for typical DML column datatypes. Dbms_errlog.create_error_log 11g CREATE TABLE dest ( id NUMBER(10) NOT NULL, code VARCHAR2(10) NOT NULL, description VARCHAR2(50), CONSTRAINT dest_pk PRIMARY KEY (id) ); -- Create a dependant of the destination table.
Elapsed: 00:00:00.18 SQL> insert into sales_target 2 select * 3 from sales_src 4 log errors 5 reject limit unlimited 6 / 918834 rows created. error costs: direct path To complete our examination of the general costs of error logging, we will re-run the slowest of the previous examples in direct path, as follows. The snapshots do not materially affect the runtimes. check my blog Elapsed: 00:00:00.21 Next Steps READ more about LOG ERRORS Oracle Database Data Warehousing Guide Oracle Database PL/SQL Packages and Types Reference BULK COLLECT, FORALL, and SAVE EXCEPTIONS Processing your data
When you add this error logging clause to the INSERT statement, certain types of errors no longer terminate and roll back the statement. The following example highlights this, where we compare DML error logging to row-by-row PL/SQL processing. The PL/SQL approach also incurs the cost of context switching because of having to switch between SQL and PL/SQL. Sorry to first ask then read... » Log in to post comments Very good information Permalink Submitted by kedarterdalkar on Mon, 2007-03-05 16:59.
Type --------------------------------- -------- -------------- ORA_ERR_NUMBER$ NUMBER ORA_ERR_MESG$ VARCHAR2(2000) ORA_ERR_ROWID$ ROWID ORA_ERR_OPTYP$ VARCHAR2(2) ORA_ERR_TAG$ VARCHAR2(2000) ID VARCHAR2(4000) CODE VARCHAR2(4000) DESCRIPTION VARCHAR2(4000) SQL> Insert When we built the sample schema we noted that Capturing badly formatted data is a clear case of utility, but handling incorrect referential data must be considered as to why or how DML failed. » See All Articles by Columnist SQL> exec runstats_pkg.rs_stop(1000); Run1 ran in 1190 hsecs Run2 ran in 3522 hsecs Run1 ran in 33.79% of the time Name Run1 Run2 Diff LATCH.undo global data 8,652 9,663 1,011 STAT..user You know that the traditional way of declaring a cursor against the source table—reading it row by row, inserting the contents into the target table, and dealing with exceptions as they
SQL> The rows that failed during the insert are stored in the ERR$_DEST table, along with the reason for the failure. Suite B, First Floor, Moore House, 11-13 Black Lion Street, Brighton, BN1 1ND, United Kingdom P: +44 (0) 1273 911 268 Rittman Mead America Inc. 5280 Avalon Boulevard Alpharetta, Ga For example, if your data is held in a file, you can use SQL*Loader to automatically handle data that raises an error, but then you have to put together a control DELETE FROM dest LOG ERRORS INTO err$_dest ('DELETE') REJECT LIMIT UNLIMITED; 99996 rows deleted.
Tagging your error messages If you're coding a complex package, you might find it handy to issue multiple DML statements with error logging, then handle all the logged errors at once. Code Listing 8: Using TKPROF to look at direct-path INSERT statistics INSERT /*+ APPEND */ INTO sales_target SELECT * FROM sales_src LOG ERRORS REJECT LIMIT UNLIMITED call count cpu elapsed disk For the most part, you can create an error logging table for any table (or view) you own. Elapsed: 00:00:08.61 SQL> Next, repeat the test using a direct path load this time.
If you do not provide an error logging table name, the database logs to an error logging table with a default name. In fact, it performs significantly worse than the FORALL ... SQL> INSERT INTO tgt 2 SELECT src.* 3 FROM src, (SELECT NULL FROM dual CONNECT BY ROWNUM <= 10) multi 4 LOG ERRORS INTO tgt_exceptions; 503320 rows created. Under the manual method, you are responsible for ensuring the mandatory parts are in place and for mapping any additional columns.
Code Listing 2: Creating the SALES_SRC and SALES_TARGET tables SQL> CREATE SEQUENCE sales_id_seq; Sequence created. If we try to copy the data from the SOURCE table to the DEST table we get the following result. I use it in all my coding.