CAML query case sensitive search
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I have a caml query which is pulling data from sharepoint list

Here is the query I am using 

tempQuery = "<Query><Where><And><Eq><FieldRef Name='"+Manager+"'/><Value Type='Text'>John</Value></Eq><Eq><FieldRef Name='"+COL+"'/><Value Type='Text'>"+CURRENT_USER_Info.currFilter+"</Value></Eq></And></Where><OrderBy><FieldRef Ascending='true' Name='"+tester+"'/><FieldRef Ascending='true' Name='"+test+"'/></OrderBy></Query>";

The problem is I have search only for John and not john or JOHN

so basically looking for a caml query which can filter case sensitively..

Any help is appreciated.
