Avg_row_leng in dba_tables

Hi
Can somebody answer my querries
Is "avg_row_len" in dba_tables is in Bytes if not then what is its units ???
Will "avg_row_len"*"num_row" give table physically occupied space in terms of bytes in a tablespac ??Thanks in advacne
Bye
KVSS

yes..u are correct.
avg_row_len is in bytes and "avg_row_len"*"num_row" will give table physically occupied space in terms of bytes in a tablespace

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Accessing DBA_TABLES from PL/SQL

Hi all,
Can I access DBA_TABLES from a PL/SQL block?
Following is the code I tried:
SQL> SHOW USER
USER is "SYSTEM"
SQL> ED
Wrote file afiedt.buf
1 CREATE OR REPLACE PACKAGE BODY BARAKAU
2 AS
3 PROCEDURE UPPER_COLS ( P_USER VARCHAR2, P_TABLE VARCHAR2 ) IS
4 BEGIN
5   -- loop through tables
6   FOR T IN ( SELECT TABLE_NAME FROM DBA_TABLES WHERE TABLE_NAME = NVL(P_TABLE, TABLE_NAME)
7               AND OWNER=UPPER(P_USER) ORDER BY TABLE_NAME) LOOP
8     DBMS_OUTPUT.PUT_LINE(T.TABLE_NAME || ' processed');
9   END LOOP;
10 END UPPER_COLS;
11* END BARAKAU;
SQL> /
Warning: Package Body created with compilation errors.
SQL> SHOW ERROR
Errors for PACKAGE BODY BARAKAU:
LINE/COL ERROR
6/13     PL/SQL: SQL Statement ignored
6/36     PL/SQL: ORA-00942: table or view does not exist
8/4      PL/SQL: Statement ignored
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SQL> L 6
6* FOR T IN ( SELECT TABLE_NAME FROM DBA_TABLES WHERE TABLE_NAME = NVL(P_TABLE, TABLE_NAME)Oracle 11g on Windows

Hi,
SQL> SHOW USER
User is "SYS"
SQL>
Package created
Package body created
No errors for PACKAGE BODY SYS.BARAKAUPackage creation:
CREATE OR REPLACE PACKAGE BARAKAU AS
    PROCEDURE UPPER_COLS(P_USER VARCHAR2,
                         P_TABLE VARCHAR2);
END BARAKAU;
CREATE OR REPLACE PACKAGE BODY BARAKAU AS
    PROCEDURE UPPER_COLS(P_USER VARCHAR2,
                         P_TABLE VARCHAR2) IS
    BEGIN
        -- loop through tables
        FOR T IN (SELECT TABLE_NAME
                  FROM   DBA_ALL_TABLES
                  WHERE TABLE_NAME = NVL(P_TABLE, TABLE_NAME)
                  AND    OWNER = UPPER(P_USER)
                  ORDER BY TABLE_NAME)
        LOOP
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        END LOOP;
    END UPPER_COLS;
END BARAKAU;
SHOW ERRORSNote: It's not a good idea create specific packages or other objects with users like sys or system...
Regards,

Db_keep_cache_size and cache in dba_tables

Hello All:
I have recently alter a table to cache it in db_keep_cache pool however i do not see the change reflected in dba_tables in cache column. Is this expected behaviour?
Thanks
S~

The CACHE clause is specified when you create the table. It indicates how the blocks of this table handled in regular buffer cache. It's separate setting from keep cache.
CACHE
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Once you put your table in keep pool, the BUFFER_POOL should indicate which pool this object belong to.
select buffer_pool from dba_tables
2 where table_name='TEST1'
3 /
BUFFER_
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Hi Jewel,
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Chang_cnt count in dba_tables ...

Hi,
I have following tables which have chain_cnt count is > 0.
what is a impact for this count in performance of thease tables ...
What should i do to make it this as 0 ...
Thanks in advance
SSM
==================================================
SQL> select table_name,chain_cnt from dba_tables
2* where chain_cnt > 0
SQL> /
TABLE_NAME CHAIN_CNT
TTPLOC006730 2616
TTPLOC002730 123
TTIHRA360730 127
TTIHRA100730 877
TTDPUR920730 10
TTFGLD201730 87
TTDPUR901730 549
TTFGLD018730 2492
TTDIND902730 2
TTFCMG112730 413
TTFCMG110730 103
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TTFACP954730 391
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TTFCMG112930 90
TTFCMG100930 269
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You should compare chain_cnt to num_rows to find out whether it is really a problem. You should also check avg_row_size, to verify whether your records aren't bigger than db_block_size by design (in which case no measure would help).
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alter table <table_name> move tablespace <original_tablespace>
Sybrand Bakker
Senior Oracle DBA

Query join dba_objects and dba_tables

dear all.
i want to get : list of owners, tablespace_name where the table was created, table_name and the date created column of that table_name in tablespaces t1,t2,t3"
i try to do the script with dba_tables and dba_objects but it shows a lot of records. and the object_id exist only in dba_objects but not in dba_tables.
my query was:
select t.owner, o.created, o.object_name,
t.table_name, t.tablespace_name
from dba_tables t
--,dba_objects o
where
--(o.object_type='TABLE' and o.object_name=t.table_name)
--and
t.tablespace_name in ('t1','t2)
please could you help me??
thanks

Do you want that?
select o.owner,t.tablespace_name,t.table_name,o.created from
dba_objects o,
dba_tables t
where o.owner =t.owner and o.object_name=t.table_name
and t.tablespace_name in ('T1','T2','T3')

Dba_tables

When I describle dba_tables either from sysdba login or a user with dba login. I get the following error.
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Thanks

ordba wrote:
What are the results for
select * from dba_tab_privs where table_name = 'DBA_TABLES';
show user
desc dba_tables;
select count(*) from dba_tables;
SQL> select * from dba_tab_privs where table_name = 'DBA_TABLES';
GRANTEE                        OWNER                          TABLE_NAME
GRANTOR                        PRIVILEGE                                GRA HIE
SELECT_CATALOG_ROLE            SYS                            DBA_TABLES
SYS                            SELECT                                   NO NO
ORDSYS                         SYS                            DBA_TABLES
SYS                            SELECT                                   YES NO
MDSYS                          SYS                            DBA_TABLES
SYS                            SELECT                                   NO NO
SQL> show user
USER is "SYS"
SQL> desc dba_tables
ERROR:
ORA-04043: object dba_tables does not exist
SQL> select count(*) from dba_tables;
select count(*) from dba_tables
ERROR at line 1:
ORA-00942: table or view does not exist
SQL> Everything checks out correctly but still can't access dba_tables. This is a database that got installed on my PC as part of JD Edwards demo install. So it may not be up to date with patches. Do you think it's a bug?
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Cann't able to see the num_rows in dba_tables for the particular schems's

Hi ,
I am getting confusion when i chked in dba_tables,but when i chk in the schema getting rows.can any one help on this. Thanks!!
SQL> select table_name,num_rows from dba_tables where owner like 'ORCL';
TABLE_NAME NUM_ROWS
AUDITTRAIL
SQL> conn orcl@XE
Enter password:
Connected.
SQL> select count(*) from AUDITTRAIL;
COUNT(*)
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Hi
Use DBMS_STATS package to view and modify optimizer statistics gathered for database objects.
exec dbms_stats.gather_table_stats(ownname=>'SYS',tabname=>'ORCL',estimate_percent=>30,method_opt=>'FOR ALL COLUMNS SIZE 1',degree=>4)
THEN
select table_name,num_rows from dba_tables where owner like 'ORCL';

12c: redaction_policies table not visible in dba_tables, dictionary

The table redaction_policies is visible when we describe it or search tab but is not listed in dictionary or dba_tables.
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Name                    Null?    Type
OBJECT_OWNER            NOT NULL VARCHAR2(128)
OBJECT_NAME             NOT NULL VARCHAR2(128)
POLICY_NAME             NOT NULL VARCHAR2(128)
EXPRESSION              NOT NULL VARCHAR2(4000)
ENABLE                           VARCHAR2(7)
POLICY_DESCRIPTION               VARCHAR2(4000)
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NCDB@NCDB> select table_name from dictionary where table_name like '%REDA%';
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TNAME
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REDACTION_POLICIES
REDACTION_VALUES_FOR_TYPE_FULL
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I'd say I wouldn't expect it to be returned from dba_tables, since it's a datadictionary view, just like V$SESSION etc.
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no rows selected
However, based on the docs:
Configuring Oracle Data Redaction Policies
I'd expect to see it returned from dictionary, just like:
SQL> select * from dictionary where table_name = 'V$SESSION';
TABLE_NAME
COMMENTS
V$SESSION
Synonym for V_$SESSION
1 row selected.
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Cannot Drop Table that Shows in dba_tables

In my IDE I see two tables that I no longer need. I created them as a test to see the difference between LOGGING vs NOLOGGING. Now I want to drop the tables.
I issue the command drop table customers_no_logging.
The system responds with ORA-00942: table or view does not exist.
However, select table_name from dba_tables returns the table names in question.
Even in sqlplus I get the same result:
SQL> select table_name from dba_tables where owner = 'RUB';
TABLE_NAME
CUSTOMERS
INV_ITEM_MASTER
INV_SITE
CUSTOMERS_w_log
CUSTOMERS_no_log
5 rows selected.
SQL> drop table CUSTOMERS_no_log;
drop table CUSTOMERS_no_log
ERROR at line 1:
ORA-00942: table or view does not exist
How can I drop these tables?
Thanks,
Gregory

I was connected as RUB in my IDE and SYS in SQLPlus.
I have connected as RUB in SQLPlus and tried
SQL> drop table "RUB.CUSTOMERS_no_log";
drop table "RUB.CUSTOMERS_no_log"
ERROR at line 1:
ORA-00942: table or view does not exist
Maybe I need to stop and restart the DB?
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Difference between output of DBA_SEGMENTS,DBA_OBJECTS & DBA_TABLES.

Hi All,
I am a newbie to Oracle, was checking total no. of tables present in the DB, but got little confused now.
I tried querying DBA_SEGMENTS, DBA_OBJECTS and DBA_TABLES but got different outputs.
SQL> select object_type,count(1) from dba_objects where OBJECT_TYPE='TABLE' group by object_type;
OBJECT_TYPE                     COUNT(*)
TABLE                               2437
SQL> select segment_type,count(1) from dba_segments where segment_type='TABLE' group by segment_type;
SEGMENT_TYPE                   COUNT(*)
TABLE                         1631
If a table is a partitioned one, then each partition will be considered as a different segment hence I checked for table partition also.
SQL> select segment_type,count(*) from dba_segments where segment_type like 'TABLE_%' group by segment_type;
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TABLE SUBPARTITION         32
TABLE PARTITION           215
still the addition of above two does not give (32+215+1631=1878), i.e., not 2437
Then tried querying DBA_TABLES:
SQL> select count(1) from dba_tables;
COUNT(1)
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Prior to 11.2.0.3, Indexes on LOB columns are not included under DBA_OBJECTS, Whereas From 11.2.0.3 there is a change in which indexes on LOB columns are now included in DBA_OBJECTS.
DBA_TABLES VS DBA_SEGMENTS
DBA_TABLES includes CLUSTERED TABLES, TEMPORARY, PARTITIONED, and INDEX ORGANIZED tables that are not included in DBA_SEGMENTS as they have no storage allocations
DBA_SEGMENTS contains TYPED (for internal use only) tables ( bitand(TAB$.property, 1) = 0 ) that are not included in DBA_TABLES
DBA_TABLES VS DBA_OBJECTS
DBA_TABLES includes the internal table _default_auditing_options_ that is not included in DBA_OBJECTS
DBA_OBJECTS include TYPED (for internal use only) tables ( bitand(TAB$.property, 1) = 0 ) that are not included in DBA_TABLES
DBA_SEGMENTS VS DBA_OBJECTS
DBA_SEGMENTS includes the internal table _default_auditing_options_ that is not included in DBA_OBJECTS
DBA_OBJECTS include CLUSTERED TABLES, TEMPORARY, PARTITIONED, and INDEX ORGANIZED tables that are not included in DBA_SEGMENTS as they have no storage allocations
If you have access to My Oracle Support, Please check Note 363048.1 : WHY DO DBA_TABLES DBA_OBJECTS AND DBA_SEGMENTS DIFFER WHEN SELECTED FOR TABLES?
Regards,
Suntrupth

PL/SQL report errors: ORA-01422

Hi all,
(before i you read i would like to say i have searched the net for this error code but nothing shows up like this problem..)
I am getting an error problem when i select certain Schemas from a list on an apex app. page, it only works for some schemas not all..
When i select one schema, it is supposed to display one row.. when i select [ALL] it is supposed to show them all.
It does work if i select '[ALL]' from the select list (p3_schema_name), just not for every single individual one.
the error code:
ORA-01422: exact fetch returns more than requested number of rows
declare
vSchema varchar2(20);
vStmt varchar2(1000);
vVersion number(5);
vDBName varchar2(20);
vHostName varchar2(80);
vStmt2 varchar2(1000);
vVersion2 number(5);
vDBName2 varchar2(20);
vServer2 varchar2(80);
vSchema2 varchar2(80);
CURSOR c_schemas IS
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begin
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        htp.p('<br>');
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        htp.p('<tr>');
        htp.p('<th bgcolor="#FFCC99">SERVER NAME</th>');
        htp.p('<th bgcolor="#FFCC99">DB NAME</th>');
        htp.p('<th bgcolor="#FFCC99">SCHEMA NAME</th>');
        htp.p('<th bgcolor="#FFCC99">PATCH</th>');
        htp.p('</tr>');
        htp.p('<tr>');
        htp.p('<td>');
        htp.p(vServer2);
        htp.p('</td>');
        htp.p('<td>');
        htp.p(vDBName2);
        htp.p('</td>');
        htp.p('<td>');
        htp.p(vSchema2);
        htp.p('</td>');
        htp.p('<td>');
        htp.p(vVersion2);
        htp.p('</td>');
        htp.p('<td>');
        htp.p('<BR>');
        htp.p('</td>');
        htp.p('</tr>');
        htp.p('</tr>');
        htp.p('</table>');
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      htp.p('<br>');
      htp.p('<table border="1">');
      htp.p('<tr>');
      htp.p('<th bgcolor="#FFCC99">SERVER NAME</th>');
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      EXIT WHEN c_schemas%NOTFOUND;
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      htp.p('<tr>');
      htp.p('<td>');
      htp.p(vHostName);
      htp.p('</td>');
      htp.p('<td>');
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      htp.p('</td>');
      htp.p('<td>');
      htp.p(vSchema);
      htp.p('</td>');
      htp.p('<td>');
      htp.p(vVersion);
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      htp.p('<td>');
      htp.p('<BR>');
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      htp.p('</tr>');
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      htp.p('</tr>');
      htp.p('</table>');
CLOSE c_schemas;
END IF;
END IF;
END;I have checked the DDH_SCHEMA_NR for repeating entries of the highest number.. some of the ones that dont work do have repeating entries some don't.
Sorry if this is confusing, i have tried to explain it as best as i can.
Thanks in advance for any help.
Ashleigh

Hello Ashleigh,
Based on your code, I'd start by running this piece of SQL via command-line (thru SQL Workshop, SQL*Plus, Toad, etc.), replacing &P3_SCHEMA_NAME. and &P3_DB_NAME. with values that are currently causing the routine to fail and see if it returns more than one row. I don't know your data, but DISTINCT and GROUP BY are typically used to return multiple (though grouped/summarized) rows. It appears to be the only statement that would cause the error your seeing (more than one row being returned into single variables).
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vStmt2 := 'select distinct DDH_DB_NM, max(DDH_SCHEMA_NR)keep(dense_rank last order by ddh_runstart_td) AS "PATCH" from ' ||
vSchema2 || '.ddl_log@' || vServer2 || '.db_link GROUP BY DDH_DB_NM';Hope this helps,
John

Problem while dropping a table

Dear All,
I am facing a problem while dropping a table in Oracle 10g.
I am able to find the number of records in the table but unble to delete it.
SQL> select count(*) from merchant_audit;
COUNT(*)
30028278
SQL> drop table merchant_audit;
drop table merchant_audit
ERROR at line 1:
ORA-00942: table or view does not exist
I have to drop this table from the database. Please help.
regards,
Santhosh

Hi,
IS it a table ? Is it your table ?
Read this example :
sqlplus scott/*****
SQL> create table merchant_audit(col1 number);
Table created.
SQL> create public synonym merchant_audit for merchant_audit;
Synonym created.
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Grant succeeded.
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Connected.
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COUNT(*)
0
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drop table merchant_audit
ERROR at line 1:
ORA-00942: table or view does not exist
SQL>
See owner into the dba_tables, and if synonym into dba_synonyms.
Nicolas.
Message was edited by:
Nicolas Gasparotto

Best Practice : how 2 fetch tables, views, ... names and schema

hi,
I am looking for the best practice about getting the catalog of a database.
I have seen that I can make some select in system-tables(or views) such as DBA_TABLES and DBA_VIEWS, or DBA_CATALOG, but is that the best way to grab thses informations ?
(I ask this question because It seems a strange way to me to get the table names using a simple select, but getting column info using a specialized function, OCIDescribeAny(). this does not look like a coherent API...)
thanks for your advice
cd

in the same idea, why use OCIDescribeAny instead of doing an appropriate select in DBA_TAB_COLUMNS ?
cd

Avg_row_leng in dba_tables

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