Optimize query/search with EQ/NE

String translation to StringID (interned string ID) is currently done for each array search. This task is to move the translation up the call chain, such that it is done only once for a column.

Note: Even if a string has not been interned, it may still be present in leaf arrays which have not been interned (interned and non-interned leafs may coexist within a column)