SQL Query text formation logic after where condition

i need to generate a SQL Query using logic implemented in java, After WHERE conditions there can be multiple comparitions using AND OR NOT, eg:

WHERE column1 = 'xyz' 
and column2 = 2 or column1 = 'abc' 
and column2 = 1 and column4 IN(SUBQUERY1 condition) or column4 IN(SUBQUERY1 condition)

This can be re-write as

WHERE column1 IN('xyz','abc') and column2 ..... ??
and column4 IN(SUBQUERY1 IN OR NOT OR AND)

tell me the logic how to group them properly to form a query.

Thanks Prasanth

Answer

You should wrap your condition by () to make each condition is properly.

WHERE column1 = 'xyz' 
and (column2 = 2 or column1 = 'abc') 
and ((column2 = 1 and column4 IN(SUBQUERY1 condition)) or column4 IN(SUBQUERY1 condition))