깨진 문자열 UNLOAD 하기위한 설정

인포믹스에 깨진 (일반적으로는 코드셋이 맞지 않은 경우) 문자열이 입력된 경우가 드물게 있습니다. 

10버전 이하에서는 코드셋 확인이 느슨했기 때문에 코드셋이 맞지 않아도 데이터가 입력되는 경우가 있었던 것 같습니다.

그리고 text/clob 같은 타입에서는 데이터가 입력될 때 코드셋을 확인하지 않기때문에 unload 명령으로 데이터를 내려받지 못하는 경우도 있습니다.

어쨌든 결론적으로 IFX_UNLOAD_EILSEQ_MODE 라는 환경변수를 설정함으로써 코드셋이 맞지 않은 데이터를 UNLOAD할 수 있습니다.

아래 IBM 문서 내용을 참고해주세요.

Use the IFX_UNLOAD_EILSEQ_MODE environment variable to help migrate databases from Informix® Version 10 to Version 11.50 or 11.70, where character data might be encoded with a codeset that is different than the codeset used to create the Version 10 database.

In earlier versions of Informix, it was possible to load character data into a database that did not match the locale and codeset of the database. For example you could load Chinese data into a database created with the DB_LOCALE=en_US.8859-1 codeset. In newer versions of Informix, to insert Chinese data you would need a database created with the Chinese (DB_LOCALE=zh_tw.big5 locale and codeset.

ImportantFor databases created with Version 10 and Client SDK 2.4, when you attempt to unload the invalid character data an error occurs unless you have set this environment variable. The IFX_UNLOAD_EILSEQ_MODE environment variable enables DB-Access, dbexport, and High Performance Loader (HPL) to unload character and bypass the GLS validation that normally occurs when you unload data by using the Version 11.50 and 11.70 tools.

To use this environment variable, set it to any non-empty string.

>>-setenv--IFX_UNLOAD_EILSEQ_MODE--value-----------------------><

value

Any alpha or numeric value. For example: yes, true, or 1.

This environment variable takes effect when character data is being fetched or retrieved from the database.

setenv IFX_UNLOAD_EILSEQ_MODE 1
setenv IFX_UNLOAD_EILSEQ_MODE yes
setenv IFX_UNLOAD_EILSEQ_MODE on

This environment variable is similar to setting the EILSEQ_COMPAT_MODE configuration parameter in the ONCONFIG file. The configuration parameter affects character data that is inserted into the database, whereas the IFX_UNLOAD_EILSEQ_MODE environment variable affects character data that is unloaded from the database.

출처

https://www.ibm.com/support/knowledgecenter/ko/SSGU8G_11.70.0/com.ibm.sqlr.doc/ids_sqr_416.htm