Category: Java | DevOps | APEX | Scripts

Database, SQL | PLSQL

Oracle Database 9i: Where is my SQL_ID? Which SQL is in lock?

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Struggling with that, right?
As you know, in Oracle Database 9i the view V$SESSION doesn’t have SQL_ID column…
So how to map SQLs in my database? And, for example, how to get the SQLs causing a lock?

In the end of the day, the SQL_ID is only a representation of the hash_value of an SQL. You can even make the translation from SQL_ID to Hash Value as you can check on this post by Tanel Poder.

Ok, but I have to map which sql is causing the lock in my 9i database, how can I do that?

Here it goes:

If session status is ACTIVE:

SELECT s1.sql_text from v$sqlarea s1,v$session s2 where s2.SID=&sid and s2.SQL_ADDRESS = s1.ADDRESS

If session status is INACTIVE:

SELECT s1.sql_text from v$sqlarea s1,v$session s2 where s2.SID=&sid and s2.prev_sql_addr = s1.ADDRESS

You’re welcome! 😉

See you next week!

Database, Performance, SQL | PLSQL

Parameter Workarounds: Changing your Entire Database’s Behavior Because of a Query

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This post is just a reflection, basically based on my last post about Adaptive Query Optimization/SQL Plan Directives. Several times we find some situations that can be solved by setting a parameter (likely a “_”) and we just proceed with an “alter system” disregarding about all the impact of this.

This is specially important when talking about “optimizer” parameters even for bugs causing ORA-600’s or performance issues… Changing those parameters in system will affect not only the SQL with the error but all SQLs in database, which may cause a really bad effect in some cases.

bad-idea-sign

Ok Matheus, but what can I do?
Let’s to the obvious and generally applied methods:

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Database, Enterprise Manager, SQL | PLSQL

EM Event: Number of failed login attempts exceeds threshold value [Part 2]

Hello,
As a second part of last week’s post, here is a way to accomplish that without using audit. Using a simple logon trigger! 🙂
Take a look:

First step: Create a table to store the data.

CREATE TABLE SYS.TRG_LOGON (SCHEMA VARCHAR2(50), SERVER VARCHAR2(200), FAILTIME DATE, ERROR VARCHAR2(200));

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Database, Errors and Bugs, SQL | PLSQL

User EXPIRED(GRACE) – How to Never Expire!

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Ok, this is a common issue, once it’s like the default behavior of oracle for DEFAULT profile, used as DEFAULT to new users. But it’s really easy to solve. 🙂

Before expiring you should be received some:

ORA-28002: the password will expire within x days

Ok then, but what if you are facing errors to reuse the same password, don’t know the password and yet, how to never let it happen again?

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Linux, Shell Scripts

umount: This utility only unmounts cifs filesystems

Can’t umount Red-Hat filesystem with error “This utility only unmounts cifs filesystems” either with force?

[@Linux-redhat5 ~]$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 5.11 (Tikanga)

ERROR:

[@Linux-redhat5 /]# umount /cifsfilesystem/data/custom
This utility only unmounts cifs filesystems.
This utility only unmounts cifs filesystems.
This utility only unmounts cifs filesystems.

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Database, RAC | Data Guard, Shell Scripts

Shellscript: Which database is this service_name from?

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Hey!
Strange question, right? You should know you applications and databases and how everything works, right?

Happen that some days ago a client requested me to identify from which database is a service_name. Easy? Not if the server have 46 database instances running…

Ok, now how can I can this information as quick as possible?

I know that the command below give me all distinct databases in CRS:

/u01/app/12.1.0.2/grid/bin/crsctl stat res -t -w "TYPE = ora.database.type"

Now, lets make some sed magic:

[root@nprd01dbadm01 ~]# /u01/app/12.1.0.2/grid/bin/crsctl stat res -t -w "TYPE = ora.database.type" |grep ora. |sed 's/ora./srvctl status service -d /' |sed 's/.db/ |grep \$1/' | head -1
srvctl status service -d dba |grep $1

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Application | Middleware | GoldenGate, GoldenGate, Shell Scripts, SQLServer

Teradata ODBC for Unix OS

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To connection between unix machine with teradata environment is needed to install ODBC Driver and some others components (dependencies). All Items can be found in Teradata Downloads site: https://downloads.teradata.com/

Teradata OBDC Driver has 3 dependecies:

1. Shared common components for Internationalization (TDICU)
2. Teradata GSS client package (TeraGSS)
3. Teradata Tools and Utilities Base (TTU)

After download all items, run as root: rpm -ivh “component_name” –nodeps

Eg: rpm -ivh teragss1510-15.10.02.06-1.noarch.rpm --nodeps

Use “–nodeps” only to not need to install in order

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Database, Errors and Bugs, Java | DevOps | APEX | Scripts, Migration | Upgrades | Patching

“java.sql.SQLException: ORA-28040: No matching authentication protocol” After Upgrade Database to 12c

Hello everyone!

I already wrote a post about it but I think I was not clear and easy to find enough. So let me make another post about and add some information…

Ok, are you facing a “java.sql.SQLException: ORA-28040: No matching authentication protocol” after upgrade your database to 12c?

It’s related to old jdbc driver version in your application. Please review matrix available in this post and check your application. The MOS noted below have good information about it…

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