ODBC Performs a FULL TABLE SCAN When SQL_WCHAR Is Specified in SQLBindParameter For VARCHAR2 Columns
(Doc ID 762091.1)
Last updated on JANUARY 30, 2022
Applies to:Oracle ODBC Driver - Version 10.2.0.1.0 and later
Information in this document applies to any platform.
1)Oracle ODBC does not use the INDEX scan when SQL_WCHAR is specified as parametertype in call to SQLBindParameter for varchar2 column
2) The query is incorrectly performing a full table/index scan instead of an unique/range index scan.
4) When looking at advanced explain plan, sqltxplain or 10053 trace, you notice that the "Predicate Information" shows is doing a "filter(SYS_OP_C2C)".
To view full details, sign in with your My Oracle Support account.
Don't have a My Oracle Support account? Click to get started!
In this Document