Oracle ODBC: Why are national characters changed to Latin equivalent in SELECT result -

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i have oracle 11 database connect using both jdbc , odbc. jdbc works well, in odbc polish letters in select result changed latin equivalent, example ą -> a, Ó -> o etc. tested application , simple python program uses odbc module. same value database returned as:

zamoŚĆ - jdbc zamosc - odbc

my environment:

db server: oracle database 11g release 11.2.0.1.0 - 64bit production

client machine:

  • windows server 2008 r2 64 bit
  • oracle clients in 32 bit , 64 bit versions in: c:\oracle\ora1120_32bit , c:\oracle\ora1120_64bit
  • odbc manager reports oracle driver version as: 11.02.00.01

i think locales set poland/polish, not visible set command line utility.

anybody knows odbc or environment setting responsible translation of polish letters latin equivalents?

i suspect value of client character set not same in both cases. can check value of nls_lang setting:

  • since on windows, should set in registry (probably hkey_local_machine -> software -> oracle -> your_home -> nls_lang)
  • you've found doesn't solve problem, adding environment variable nls_lang did work !

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