Reading Oracle tables in ABAP

Is it possible to read an Oracle table (not an SAP table) in an ABAP program?

Hi,
You can do that via Native SQL. Check the link below:
http://help.sap.com/saphelp_nw70/helpdata/en/fc/eb3b8b358411d1829f0000e829fbfe/content.htm
Native SQL for ORACLE:
http://help.sap.com/saphelp_nw70/helpdata/en/a3/74caa1d9c411d1950e0000e8353423/content.htm
Regards
Saket Sharma

Similar Messages

Custom databases (oracle tables versus abap 'z' tables)

We are relatively new to SAP PI. Many of our developers come from a EAI background rather than an abap background. How to do you recommend creating customized tables - directly create an oracle database and schema and administer outside of the sap landscape - retrieving data from java or by creating the oracle tables from within the abap stack?
Are there any performance considerations in one approach over another?
Given the fact that SAP long-term plans on moving away from the abap stack - is that a consideration?

Hi,
Imho, you need to get (meaning, extract into separate fields) the different supplier types from Table1 first. Your key for Table1 is the vendor no, which is also the key in Table2 (or the key for Table2 is Vendor no & Type).
For better performance, better select multiple/all required entries from Table1 instead of doing a select endselect.
Depending on the format of the vendortypes in Table1, put them in a new itab (for our purpose named Table1New where vendor no & type are the only 2 fields. For example, if the type length is fixed to 2 chars, or divided by space,... use your coding accordingly.
Next step is to select all vendor no's in Table2 which you have selected in Table1. If in Table2, the vendor no is the only key (and the all vendor types are filled in a single record), then loop check the vendor types from Table1New against the types in Table2.
If the key of Table2 is vendor no & vendor type, then do a read table for the key.
The logic in pseudo-code:
Select from Table1 into table. If you'd like to limit the selection size, add package size statement.
     extract the vendor types in to itab Table1New.
     Select the vendor & types from Table2 by using the for all entries option (better performance).
     loop at Table1New
          check in Table2:
               if the unique key is vendor no: check all fields for the vendor type from Table1New
               if the unique key combo is vendor no & type: check by using a read table.
          If not found => add entry to Table2
     endloop.
endselect Table1 (when using package size)
I guess the most difficult step is to extract the types from Table1 into separate fields, all the rest seems straight forward. Please keep in mind the itab type definitions for a better performance.
Good luck!
Best regards,
Zhou

Accessing Oracle Tables using ABAP

Dear All,
We are using SAP ECC 6.0, we need to access some of the tables in oracle system using ABAP program. Is there any wany to access the oracle tables.
Please suggest and do the needful.
Thanks in advance,
Chandra

DECLARE YOUR ORACLE INSTANCE INTO TABLE DBCON
AND USE THE FOLLOWING FM TO ACCESS YOUR DATA
RSDBC_DB_DATA_GET
RSDBC_DB_DSOURCE_CHECK
RSDBC_DB_DSOURCE_CONVERT
RSDBC_DB_DSOURCE_GENERATE
RSDBC_DB_FIELDS_CHECKS
RSDBC_DB_FIELDS_GET
RSDBC_DB_SCHEMAS_GET
RSDBC_DB_TABLES_GET
RSDL_CONNECTION_CHECK
RSDL_DB_GET_ALL_TABLES
RSDL_DB_GET_DATA
RSDL_DB_GET_DATA_BWS
RSDL_DB_RFC_GET
RSDL_TRACEFILE_DISPLAY
RSDS_ACCESS_DB_DATA_UPLOAD
RSDS_ACCESS_DB_DATA_UPLOAD_2
RSDS_ACCESS_DB_FIELDS_GET
RSDS_ACCESS_DB_TABLES_GET
OR WRITE YOUR OWN CODE USING THIS OBJECTS
cl_sql_connection
cl_sql_statement
cl_sql_result_set

Read DB2 tables from ABAP program

Hi All,
I have a requirement to read a DB2 table(in our landscape) from the ABAP program. I appreciate any pointers.
Thanks,
Kiran.

Connecting to an External database from SAP
Step 1: Create an entry for the External database in DBCON table using Trxn: DBCA.
Table: DBCON (Description of Database Connections)
Field Name Description Value (For: E.g.:)
CON_NAME Logical name for a database RAJ
DBMS Database system MSS
USER_NAME Database user <username>
PASSWORD Password for setting up the connection to the database <pwd>/<pwd>
CON_ENV Database-specific information for a database connection MSSQL_SERVER=depotserver MSSQL_DBNAME=HOF_INDORE
DB_RECO Availability type for an open database connect
Step 2: Now you can write code to connect to the external database
Your Sample code can be something like this
FUNCTION-POOL z_houston. "MESSAGE-ID ..
DATA: BEGIN OF wa,
c_locid(3),
c_locname(50),
c_locstate(5),
END OF wa.
FUNCTION z_houston_connect.
""Local interface:
EXEC SQL.
CONNECT TO 'RAJ' AS 'V'
ENDEXEC.
EXEC SQL.
SET CONNECTION 'V'
ENDEXEC.
*- Get the data from MS-SQL Server
EXEC SQL.
open C1 for
select
loc_id,
loc_name,
loc_state
from ho_loc_mast
ENDEXEC.
DO.
EXEC SQL.
FETCH NEXT C1 into :wa-c_locid, :wa-c_locname, :wa-c_locstate
ENDEXEC.
IF sy-subrc = 0.
PERFORM loop_output.
ELSE.
EXIT.
ENDIF.
ENDDO.
EXEC SQL.
CLOSE C1
ENDEXEC.
ENDFUNCTION.
*& Form LOOP_OUTPUT
Output
FORM loop_output .
WRITE: /5 wa-c_locid, 10 wa-c_locname, 65 wa-c_locstate.
CLEAR wa.
ENDFORM. " LOOP_OUTPUT

Read Oracle 10g Tables to SQL Server 2012

Hi all,
I have Oracle 10g on an XP machine, and use the 'Oracle in OraDB10g_home1' driver to read the data. I have another Windows Server 2008 R2 machine on the same network, with SQL Server 2012 on it. What is the best way to read Oracle Tables in SQL Server? Can I setup an ODBC link from my Windows Server machine to the Oracle Database (which would require me to download an Oracle ODBC driver)? Or is the best way to export the required tables from Oracle (e.g. into csv format) and import them into SQL?
Thanking you in advance,
Imelda.

987575 wrote:
Hi all,
I have Oracle 10g on an XP machine, and use the 'Oracle in OraDB10g_home1' driver to read the data. I have another Windows Server 2008 R2 machine on the same network, with SQL Server 2012 on it. What is the best way to read Oracle Tables in SQL Server? Can I setup an ODBC link from my Windows Server machine to the Oracle Database (which would require me to download an Oracle ODBC driver)? Or is the best way to export the required tables from Oracle (e.g. into csv format) and import them into SQL?
Thanking you in advance,
Imelda.You should use Heterogeneous Services
Following is a demonstration in ASKTOM to connect from Oracle to Excel, You can use the same to connect to SQL Server.
http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:4406709207206#18830681837358

How to read a CSV file and Insert data into an Oracle Table

Hi All,
I have a Clob file as a in parameter in my PROC. . File is comma separated.need procedure that would parse this CLOB variable and populate in oracle table .
Please let me some suggestions on this.
Thanks,
Chandra R

jeneesh wrote:
And, please don't "hijack" 5 year old thread..Better start a new one..I've just split it off to a thread of it's own. ;)
@OP,
I have a Clob file as a in parameter in my PROC. . File is comma separated.need procedure that would parse this CLOB variable and populate in oracle table .You don't have a "clob file" as there's no such thing. CLOB is a datatype for storing large character based objects. A file is something on the operating system's filesystem.
So, why have you stored comma seperated data in a CLOB?
Where did this data come from? If it came from a file, why didn't you use SQL*Loader or, even better, External Tables to read and parse the data into structured format when populating the database with it?
If you really do have to parse a CLOB of data to pull out the comma seperated values, then you're going to have to write something yourself to do that, reading "lines" by looking for the newline character(s), and then breaking up the "lines" into the component data by looking for commas within it, using normal string functions such as INSTR and SUBSTR or, if necessary, REGEXP_INSTR and REGEXP_SUBSTR. If you have string data that contains commas but uses double quotes around the string, then you'll also have the added complexity of ignoring commas within such string data.
Like I say... it's much easier with SQL*Loader of External Tables as these are designed to parse such CSV type data.

How to read .html file and store values into oracle table from html file

Hi all ,
How to read .html file and store values into oracle table from html file using pl/sql
Please Help.....

Hi,
Kindly find following sample html code ,i want to store every value in different column in database .
<html><body><p/>
<div style="position:absolute;top:47px;left:37px;font-family:'Times New Roman';font-size:10pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:47px;left:680px;font-family:'Times New Roman';font-size:10pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:94px;left:151px;font-family:'Times New Roman';font-size:1pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:1080px;left:115px;font-family:'Times New Roman';font-size:8pt;white-space:nowrap;">4497743
</div>
<div style="position:absolute;top:1079px;left:442px;font-family:'Times New Roman';font-size:9pt;white-space:nowrap;"> Miclyn Express Offshore Pre-Quotation Disclosure
</div>
<div style="position:absolute;top:1079px;left:680px;font-family:'Times New Roman';font-size:9pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:1079px;left:723px;font-family:'Times New Roman';font-size:9pt;white-space:nowrap;">page 5
</div>
<div style="position:absolute;top:1083px;left:151px;font-family:'Times New Roman';font-size:1pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:107px;left:151px;font-family:'Times New Roman';font-size:10pt;white-space:nowrap;"><b>Attachment 2 ¿ indicative statement of 20 largest shareholders </b>
</div>
<div style="position:absolute;top:139px;left:262px;font-family:'Times New Roman';font-size:10pt;white-space:nowrap;"><b>Name </b>
</div>
<div style="position:absolute;top:131px;left:415px;font-family:'Times New Roman';font-size:10pt;white-space:nowrap;"><b>Number of Shares </b>
</div>
<div style="position:absolute;top:147px;left:458px;font-family:'Times New Roman';font-size:10pt;white-space:nowrap;"><b>Held </b>
</div>
<div style="position:absolute;top:131px;left:560px;font-family:'Times New Roman';font-size:10pt;white-space:nowrap;"><b>Percentage of </b>
</div>
<div style="position:absolute;top:147px;left:567px;font-family:'Times New Roman';font-size:10pt;white-space:nowrap;"><b>shares held </b>
</div>
<div style="position:absolute;top:179px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Macquarie Capital Group Limited 92,378,000
</div>
<div style="position:absolute;top:179px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:179px;left:618px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">34.00%r
</div>
<div style="position:absolute;top:179px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:212px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">HSBC Custody Nominees (Australia)
</div>
<div style="position:absolute;top:227px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Limited
</div>
<div style="position:absolute;top:220px;left:464px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">36,458,220
</div>
<div style="position:absolute;top:220px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:220px;left:618px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">13.42%
</div>
<div style="position:absolute;top:220px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:260px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Ray Rider Limited 27,170,000
</div>
<div style="position:absolute;top:260px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:260px;left:618px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">10.00%
</div>
<div style="position:absolute;top:260px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:300px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:300px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">7.96%
</div>
<div style="position:absolute;top:300px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:333px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">National Australia Bank Custodian
</div>
<div style="position:absolute;top:348px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Services
</div>
<div style="position:absolute;top:341px;left:464px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">12,866,550
</div>
<div style="position:absolute;top:341px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:341px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">4.74%
</div>
<div style="position:absolute;top:341px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:381px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Citigroup Nominees Pty Ltd 6,942,541
</div>
<div style="position:absolute;top:381px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:381px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">2.56%r
</div>
<div style="position:absolute;top:381px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:421px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:421px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">2.14%r
</div>
<div style="position:absolute;top:421px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:462px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">UBS Securities Australia Ltd 4,806,760
</div>
<div style="position:absolute;top:462px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:462px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">1.77%
</div>
<div style="position:absolute;top:462px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:494px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Merrill Lynch Equities (Australia)
</div>
<div style="position:absolute;top:510px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Limited
</div>
<div style="position:absolute;top:502px;left:472px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">4,325,000
</div>
<div style="position:absolute;top:502px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:502px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">1.59%
</div>
<div style="position:absolute;top:502px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:550px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Equities Ltd
</div>
<div style="position:absolute;top:542px;left:472px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">4,150,000
</div>
<div style="position:absolute;top:542px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:542px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">1.53%
</div>
<div style="position:absolute;top:542px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:575px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Bond Street Custodians Limited - A/C
</div>
<div style="position:absolute;top:590px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Institutional
</div>
<div style="position:absolute;top:583px;left:472px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">2,750,000
</div>
<div style="position:absolute;top:583px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:583px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">1.01%
</div>
<div style="position:absolute;top:583px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:623px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Cogent Investment Operations Pty Ltd 2,599,321
</div>
<div style="position:absolute;top:623px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:623px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">0.96%
</div>
<div style="position:absolute;top:623px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:663px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Skeet Nominees Pty Ltd 2,276,736
</div>
<div style="position:absolute;top:663px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:663px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">0.84%
</div>
<div style="position:absolute;top:663px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:704px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Diederik de Boer 1,917,561
</div>
<div style="position:absolute;top:704px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:704px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">0.71%
</div>
<div style="position:absolute;top:704px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:744px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Ecapital Nominees Pty Limited 1,594,736
</div>
<div style="position:absolute;top:744px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:744px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">0.59%
</div>
<div style="position:absolute;top:744px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:777px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Neweconomy Com Au Nominees Pty 9
</div>
<div style="position:absolute;top:792px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Limited <900 Account>
</div>
<div style="position:absolute;top:784px;left:472px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">1,594,7360
</div>
<div style="position:absolute;top:784px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:784px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">0.59%
</div>
<div style="position:absolute;top:784px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:825px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Sonray Capital Markets Pty Ltd 1,236,842
</div>
<div style="position:absolute;top:825px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:825px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">0.46%
</div>
<div style="position:absolute;top:825px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:865px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Argo Investments Limited 1,050,000
</div>
<div style="position:absolute;top:865px;left:531px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:865px;left:625px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">0.39%
</div>
<div style="position:absolute;top:865px;left:663px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">
</div>
<div style="position:absolute;top:905px;left:161px;font-family:'Times New Roman';font-size:11pt;white-space:nowrap;">Idameno (No 79) Nominees Pty Limited 724,210</div>
<div style="position:absolute;top:1103px;">
</body></html>
Thanks..........................

1.is it possible to read a .xls file and load it into an oracle table

1.is it possible to read a .xls file and load it into an oracle table, using oracle database or oracle forms i.e. either utl_file, or text_io, or any other oracle tool.
As far as I know we need a csv file or a txt ( tab delimited) file ?
2.Are there any windows tools for the same

Hi,
If you want to use the DDE package to read the XLS file then yes, you will neeed to know the number of rows and columns in the input file.
i.e. How will you know :
1) How many columns are there in the input file.
If I have a XLS file with the following data :
R1C1 R1C2 R1C3 R1C4 R1C5 R1C6 R1C7
xxx xx x
Where R represents row and C represents column, then how will you know the each row has 7 columns. If you know the answer upfront, then it's not a issue.
Using the DDE apprach, you will have to specify the RowNum and the ColumnNo of each idividual cells to read/write data from xls sheet.
Look at the syntax in my ealier post.
using the other approch (i.e. comma delimited text file - CSV file) , you need not know the number of columns as you can loop thru the input record till the last column is read.
All you have to do is to look for the 'n' occurances of the field delimiter say ',', do a substr from the current position to the point where the ',' was found.
This process is to be repeated in a loop till all columns are read.
The TEXT_IO package can trap for EOF (End Of File).
Hope I made myself clear.
-- Shailender Mehta --

Oracle Table Storage Parameters - a nice reading

bold Gony's reading excercise for 07/09/2009 bold -
The below is from the web source http://www.praetoriate.com/t_%20tuning_storage_parameters.htm. Very good material.The notes refers to figures and diagrams which cannot be seen below. But the text below is ver useful.
Let’s begin this chapter by introducing the relationship between object storage parameters and performance. Poor object performance within Oracle is experienced in several areas:
Slow inserts Insert operations run slowly and have excessive I/O. This happens when blocks on the freelist only have room for a few rows before Oracle is forced to grab another free block.
Slow selects Select statements have excessive I/O because of chained rows. This occurs when rows “chain” and fragment onto several data blocks, causing additional I/O to fetch the blocks.
Slow updates Update statements run very slowly with double the amount of I/O. This happens when update operations expand a VARCHAR or BLOB column and Oracle is forced to chain the row contents onto additional data blocks.
Slow deletes Large delete statements can run slowly and cause segment header contention. This happens when rows are deleted and Oracle must relink the data block onto the freelist for the table.
As we see, the storage parameters for Oracle tables and indexes can have an important effect on the performance of the database. Let’s begin our discussion of object tuning by reviewing the common storage parameters that affect Oracle performance.
The pctfree Storage Parameter
The purpose of pctfree is to tell Oracle when to remove a block from the object’s freelist. Since the Oracle default is pctfree=10, blocks remain on the freelist while they are less than 90 percent full. As shown in Figure 10-5, once an insert makes the block grow beyond 90 percent full, it is removed from the freelist, leaving 10 percent of the block for row expansion. Furthermore, the data block will remain off the freelist even after the space drops below 90 percent. Only after subsequent delete operations cause the space to fall below the pctused threshold of 40 percent will Oracle put the block back onto the freelist.
Figure 10-83: The pctfree threshold
The pctused Storage Parameter
The pctused parameter tells Oracle when to add a previously full block onto the freelist. As rows are deleted from a table, the database blocks become eligible to accept new rows. This happens when the amount of space in a database block falls below pctused, and a freelist relink operation is triggered, as shown in Figure 10-6.
Figure 10-84: The pctused threshold
For example, with pctused=60, all database blocks that have less than 60 percent will be on the freelist, as well as other blocks that dropped below pctused and have not yet grown to pctfree. Once a block deletes a row and becomes less than 60 percent full, the block goes back on the freelist. When rows are deleted, data blocks become available when a block’s free space drops below the value of pctused for the table, and Oracle relinks the data block onto the freelist chain. As the table has rows inserted into it, it will grow until the space on the block exceeds the threshold pctfree, at which time the block is unlinked from the freelist.
The freelists Storage Parameter
The freelists parameter tells Oracle how many segment header blocks to create for a table or index. Multiple freelists are used to prevent segment header contention when several tasks compete to INSERT, UPDATE, or DELETE from the table. The freelists parameter should be set to the maximum number of concurrent update operations.
Prior to Oracle8i, you must reorganize the table to change the freelists storage parameter. In Oracle8i, you can dynamically add freelists to any table or index with the alter table command. In Oracle8i, adding a freelist reserves a new block in the table to hold the control structures. To use this feature, you must set the compatible parameter to 8.1.6 or greater.
The freelist groups Storage Parameter for OPS
The freelist groups parameter is used in Oracle Parallel Server (Real Application Clusters). When multiple instances access a table, separate freelist groups are allocated in the segment header. The freelist groups parameter should be set the number of instances that access the table. For details on segment internals with multiple freelist groups, see Chapter 13.
NOTE: The variables are called pctfree and pctused in the create table and alter table syntax, but they are called PCT_FREE and PCT_USED in the dba_tables view in the Oracle dictionary. The programmer responsible for this mix-up was promoted to senior vice president in recognition of his contribution to the complexity of the Oracle software.
Summary of Storage Parameter Rules
The following rules govern the settings for the storage parameters freelists, freelist groups, pctfree, and pctused. As you know, the value of pctused and pctfree can easily be changed at any time with the alter table command, and the observant DBA should be able to develop a methodology for deciding the optimal settings for these parameters. For now, accept these rules, and we will be discussing them in detail later in this chapter.
There is a direct trade-off between effective space utilization and high performance, and the table storage parameters control this trade-off:
For efficient space reuse A high value for pctused will effectively reuse space on data blocks, but at the expense of additional I/O. A high pctused means that relatively full blocks are placed on the freelist. Hence, these blocks will be able to accept only a few rows before becoming full again, leading to more I/O.
For high performance A low value for pctused means that Oracle will not place a data block onto the freelist until it is nearly empty. The block will be able to accept many rows until it becomes full, thereby reducing I/O at insert time. Remember that it is always faster for Oracle to extend into new blocks than to reuse existing blocks. It takes fewer resources for Oracle to extend a table than to manage freelists.
While we will go into the justification for these rules later in this chapter, let’s review the general guidelines for setting of object storage parameters:
Always set pctused to allow enough room to accept a new row. We never want to have a free block that does not have enough room to accept a row. If we do, this will cause a slowdown since Oracle will attempt to read five “dead” free blocks before extending the table to get an empty block.
The presence of chained rows in a table means that pctfree is too low or that db_block_size is too small. In most cases within Oracle, RAW and LONG RAW columns make huge rows that exceed the maximum block size for Oracle, making chained rows unavoidable.
If a table has simultaneous insert SQL processes, it needs to have simultaneous delete processes. Running a single purge job will place all of the free blocks on only one freelist, and none of the other freelists will contain any free blocks from the purge.
The freelist parameter should be set to the high-water mark of updates to a table. For example, if the customer table has up to 20 end users performing insert operations at any time, the customer table should have freelists=20.
The freelist groups parameter should be set the number of Real Application Clusters instances (Oracle Parallel Server in Oracle8i) that access the table.

sb92075 wrote:
goni ,
Please let go of 20th century & join the rest or the world in the 21st century.
Information presented is obsoleted & can be ignored when using ASSM & ASSM is default with V10 & V11I said the same over here for the exactly same thread, not sure what the heck OP is upto?
Oracle Table Storage Parameters - a nice reading
regards
Aman....

Can I use APEX directly read/sync with the Oracle Tables ?

We have a Oracle Database to manage the design data.I am trying to setup a web-based front end using APEX to manage & monitor the parts ordering & logisitics.I want to drive the master data directly from the database without any export or data transfer ? Can I directly read or Link an Oracle tables from APEX application.
Also,once this is setup,I am looking for setting up some data entry fields to enter Purchasing & Logistics information.Hope I can achieve this using APEX !
Look forward for the appropriate response.
Thanks,
Sham

Tony,
Thanks & Appreciate your Quick response.
Glad that I can use the existing Oracle db schema with APEX.I am not sure if there is any information as how I can connect or link my production schema to the APEX ! I was able to import .csv files & use XL data to create some test databases & play with APEX..but,I did try to go thru most of the instructions & guides to find how to use the production oracle tables,but,could not find anything particular...Please send me a link or material info.
I suppose I can then use which ever attribute or table data that is required to build the queries ! I am planning to use the production data to build the ordering & logistics application using APEX.Assume I can create new fields & columns for parts that will be ordered & capture/record the purchasing information like Purchase order numbers/Supplier Info/Target Delivery dates etc...
- Am on very tight schedules to get this application up & running ! Is there any support team or a technical support team that I can call upon if I need any help ?
Thanks,
Sham

Abap TIME_OUT sequencial read of table D010INC

Dear all,
I installed SAP ECC 6.0 SR3 in Linux SLES10 with Oracle 10.2.0.2.0.
Most of the SAP transactions hangs.
If I check transaction SM50 I find that SAP is making a sequential read of table D010INC.
The programs dumps with timeout in instructions like:
"insert report repname from report. "
It seams that the generation of programs, like the first time we run transaction SE16 for a table, atempts to add lines to table D010INC and generate a timeout.
Help needed, answer will be rewarded
Jorge

I have a similar problem.
Following query returned the following results
SQL> select count(*) from SAPSR3.D010INC;
COUNT(*)
16084840
I have already executed SGEN, it took more than 20 hours to complete, but completed successfully.
Shall I "create optimizer statistics with brtools" or increase timeout duration ?
I have restarted the instance many num of times.
Kindly refer
Tmeout in creating company
for details
Thanks in advance
Ruhi

Ora-01466 unable to read data table definition has changed oracle.

hi all,
i truncated a table before 10 min. now i want the data's so i used this query ;
select *
from ( select *
from sometable where some_condition )
as of timestamp sysdate-1;
but it shows:
""" ora-01466 unable to read data table definition has changed oracle"""";
how to get the deleted records from database????????????
Edited by: 887268 on Oct 24, 2011 4:02 AM

Error: ORA 1466
Text:   unable to read data -- object definition has changed
Cause: This is a time-based read consistency error for a database object,
        such as a table or index.
        Either of the following may have happened:
        The query was parsed and executed with a snapshot older than the time
        the object was changed.
        The creation time-stamp of the object is greater than the current
        system time.
        This happens, for example, when the system time is set to a time
        earlier than the creation time of the object.
Action: If the cause is
        an old snapshot, then commit or rollback the transaction and resume
        work.
        a creation time-stamp in the future, ensure the system time is set
        correctly.
        If the object creation time-stamp is still greater than the system
        time, then export the object's data, drop the object, recreate the
        object so it has a new creation time-stamp, import the object's data,
        and resume work.

Read xml into oracle table

Hi,
How can I read an xml.file read in an oracle table (invoice varchar2(20), invoice_line number, ship_date date, country varchar2(100))?
The xml looks like this:
<?xml version="1.0" encoding="utf-8" ?>
- <dataset xmlns="http://developer.cognos.com/schemas/xmldata/1/" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance">
- 
- <metadata>
<item name="Invoice #" type="xs:string" length="42" />
<item name="Invoice Line" type="xs:string" length="10" />
<item name="Ship Date" type="xs:date" />
<item name="COUNTRY" type="xs:string" length="8" />
</metadata>
- <data>
- <row>
<value>26623</value>
<value>0001</value>
<value>2010-05-03</value>
<value>USA</value>
</row>
- <row>
<value>26624</value>
<value>0001</value>
<value>2010-05-03</value>
<value>USA</value>
</row>
- <row>
<value>26624</value>
<value>0003</value>
<value>2010-05-03</value>
<value>USA</value>
</row>
- <row>
<value>26625</value>
<value>0001</value>
<value>2010-05-03</value>
<value>USA</value>
</row>
</data>
</dataset>
Thnx, Robbert

Hi,
Possible solutions will depend on your db version, which you didn't give.
The following example assumes you're using 10gR2 :
CREATE TABLE invoices (
invoice varchar2(20),
invoice_line number,
ship_date date,
country varchar2(100)
DECLARE
xmldoc xmltype := xmltype(
'<?xml version="1.0" encoding="utf-8" ?>
<dataset xmlns="http://developer.cognos.com/schemas/xmldata/1/" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance">
<metadata>
<item name="Invoice #" type="xs:string" length="42" />
<item name="Invoice Line" type="xs:string" length="10" />
<item name="Ship Date" type="xs:date" />
<item name="COUNTRY" type="xs:string" length="8" />
</metadata>
<data>
<row>
<value>26623</value>
<value>0001</value>
<value>2010-05-03</value>
<value>USA</value>
</row>
<row>
<value>26624</value>
<value>0001</value>
<value>2010-05-03</value>
<value>USA</value>
</row>
<row>
<value>26624</value>
<value>0003</value>
<value>2010-05-03</value>
<value>USA</value>
</row>
<row>
<value>26625</value>
<value>0001</value>
<value>2010-05-03</value>
<value>USA</value>
</row>
</data>
</dataset>'
BEGIN
INSERT INTO invoices (invoice, invoice_line, ship_date, country)
SELECT invoice, invoice_line, to_date(ship_date, 'YYYY-MM-DD'), country
FROM XMLTable(
   XMLNamespaces(default 'http://developer.cognos.com/schemas/xmldata/1/'),
   '/dataset/data/row'
   passing xmldoc
   columns
     invoice      varchar2(20) path 'value[1]',
     invoice_line number        path 'value[2]',
     ship_date    varchar2(10) path 'value[3]',
     country      varchar2(100) path 'value[4]'
END;
/If your XML document resides outside the database, you may also access it directly through a DIRECTORY object :
CREATE OR REPLACE DIRECTORY xmldir AS 'C:\oracle\invoices\xml';
INSERT INTO invoices (invoice, invoice_line, ship_date, country)
SELECT invoice, invoice_line, to_date(ship_date, 'YYYY-MM-DD'), country
FROM XMLTable(
XMLNamespaces(default 'http://developer.cognos.com/schemas/xmldata/1/'),
'/dataset/data/row'
passing xmltype( bfilename('XMLDIR', 'invoices.xml'), nls_charset_id('AL32UTF8') )
columns
   invoice      varchar2(20) path 'value[1]',
   invoice_line number        path 'value[2]',
   ship_date    varchar2(10) path 'value[3]',
   country      varchar2(100) path 'value[4]'
);Some docs about XMLTable and XML querying with Oracle :
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/functions228.htm#CIHGGHFB
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14259/xdb_xquery.htm#ADXDB1700
Edited by: odie_63 on 24 juin 2010 20:07

How to read RMAN data into an ORACLE Table?

Hallo,
With regards to RMAN, how should we store the data into a database table, from the commands which can run only on RMAN prompt without using Recovery Catalog?
For Example:
RMAN> Report need backup days 3;
RMAN DATA:
RMAN-03022: compiling command: report
Report of files whose recovery needs more than 3 days of archived logs
File Days Name
1 1203 D:\ORACLE\ORADATA\TEST\SYSTEM01.DBF
2 1203 D:\ORACLE\ORADATA\TEST\RBS01.DBF
3 1203 D:\ORACLE\ORADATA\TEST\USERS01.DBF
Should it done via UTL_FILE?
If so, could someone give simple example/code how to do that, in order to write this RMAN data into an Oracle Database table?
I also set the utl_file_dir parameter to a particular directory in my database.
Thanks
W.Benvort

Actually, I am not using Recovery Catalog, so the views like RC_database, Rc_tablespaces etc , which are specific to recovery catalog are not available.
r.- this make sense at 100% because those views belong to the recovery catalog.
So, I wanted that these information, which we can get via using the commands like above, transfer into an Oracle table
r.- If you want to access the views of the Recovery Catalog to store part of that information in tables you have to have the database registered in a Recovery Catalog.
Should we keep the Recovery Catalog in Control file? Instead of using separate Schema.
r.- I recommend you to create a catalog for your database because the space the controlfile to store information regarding RMAN is reused and you can lose important information about your backups.
Can we run Catrman.sql script as a sys in order to keep the recovery catalog in sys schema?
r.- As you know, this is not recommended at all.
Conclusion : Create a Recovery Catalog and you will be able to perform all that you want regardind what you mentioned above.
I have a thread for this:
RMAN ( CATALOG CREATION ) STEP BY STEP by Joel Pérez
Joel Pérez
http://otn.oracle.com/experts

# coming when I select data from oracle table using Native SQL

Hi Gurus,
I am selecting 'First name' from oracle table directly using native sql. I am fetching 65000 records but 10+ records having '#' at the end of firstname. For eg: John#.
But oracle team couldn't find '#' in their table for those records. What could be problem?
or what could be the character in oracle which comes as '#' in abap?
Pls help...
Saj

Thanks for replies.
My DB NLS_PARAMETER is AL32UTF8. I am able to pullout data with older version of ojdbc jar file. So I think there is no issue regarding NLS setting.
So please guide me with proper solution as soon as possible.

Reading Oracle tables in ABAP

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