Select statement does not return any result with RedShift ODBC driver if where clause contains UTF-8 characters

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Title	Select statement does not return any result with RedShift ODBC driver if where clause contains UTF-8 characters

URL Name	Select-statement-does-not-return-any-result-with-RedShift-ODBC-driver-if-where-clause-contains-UTF-8-characters

Article Number	000182567

Environment	Product: Connect for ODBC RedShift driver Version: 7.1 OS: Windows Database: RedShift Application: all supported applications

Question/Problem Description

Select statement does not return any result with RedShift ODBC driver if where clause contains UTF-8 characters.

Steps to Reproduce

Clarifying Information

1. Create the following table:

create table test(col1 varchar(20))
insert into test values('的')

2. Execute the following select statement on Windows:

select * from test where col1='的'

No result is returned when the following code is called:

rc = SQLSetConnectAttr(hdbc, SQL_ATTR_APP_WCHAR_TYPE, (void*)SQL_DD_CP_UTF8, SQL_IS_INTEGER);

Error Message

Defect Number

Enhancement Number

Cause

There is no need to call SQLSetConnectAttr(SQL_ATTR_APP_WCHAR_TYPE) if the Windows application uses wchar_t for unicode columns, as windows wchar type is UTF16 by default. The driver takes care of converting the database unicode type to the application unicode type and vice versa (i.e UTF8 to UTF16 and vice versa).

Resolution

Do not call SQLSetConnectAttr(SQL_ATTR_APP_WCHAR_TYPE).

Workaround

Notes

Last Modified Date	12/2/2015 7:30 AM

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Select statement does not return any result with RedShift ODBC driver if where clause contains UTF-8 characters

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