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error 18 at 0 depth lookup: self signed certificate

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I was trying to test SSL connection between MySQL client and server. For that I created SSL certificate and keys by following the MySQL documentation at: Creating SSL Certificates and Keys Using openssl After finishing up all the commands when I verify the certificates by using: openssl verify -CAfile ca.pem server-cert.pem client-cert.pem I got the following output: error 18 at 0 depth lookup : self signed certificate error server-cert.pem: verification failed client-cert.pem: OK  Reason : The Common Name value used for the server and client certificates/keys must each differ from the Common Name value used for the CA certificate. Otherwise, the certificate and key files will not work for servers compiled using OpenSSL. Solution : When OpenSSL prompts you for the Common Name for each certificate, use different names. Common Name (e.g. server FQDN or YOUR name) []: I used values as follows: CA Cert:  ssl-ca-cert Server Cert: ssl-ca-server-cert Client Cer...
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mysql query stuck in statistics state

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I was working on a customer case where I ran into an interesting problem - Query joining about 23 tables got stuck in statistics stage. The customer need to generate a report in pipe separated values format from their database. Since the database is hosted as AWS MySQL RDS, using SELECT ... INTO OUTFILE was not an option. Therefore I decided to dump the data by using mysql command line tool along with sed command to convert tab delimited to pipe delimited column values. mysql -e "select te.EId AS \"EID\", tea.AId AS \"AID\", tea.ActivationState AS \"Status\", tp.PRDName AS \"Product\", tea.FamilyId AS \"Product Family\", tp.Ver AS \"Product Version\", tc.CSTMRName AS \"Customer Name\", tc.CSTMRIdentifier AS \"Customer ID\", tea.ActivationDateTime AS \"Activation Date\", tea.quantity AS \"Activated Quantity\", caswuid.AttrValue AS \"SWUID\", cadm.AttrValue AS \"D...
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Spool SqlPlus Output to Microsoft Excel Format

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Spool SqlPlus Output to Microsoft Excel Format SET PAGESIZE 50000 SET FEEDBACK OFF SET MARKUP HTML ON SPOOL ON SET NUM 24 SPOOL file_name.xls ---- Execute your query SPOOL OFF SET MARKUP HTML OFF SPOOL OFF Example: SET PAGESIZE 50000 SET FEED OFF MARKUP HTML ON SPOOL ON SET NUM 24 SPOOL EMP_DATA.xls Select EMPNO, ENAME, HIREDATE, SAL From Scott.EMP / [[ The output from above query will be displayed ..... ]] SPOOL OFF SET MARKUP HTML OFF SPOOL OFF NOTE: The file will contain the SQL as well. Save the file as Your_File_name.xlsx The file should be in the Current Working Directory.
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