SQL BETWEEN in HANA

Hello All,

I have to write a condition where I have to check a "DATE" lie beween two other date values as shown in the example:

var_out= CE_PROJECTION(:table1,["col1","col2","col3","col4"],  ' " col2"  BETWEEN "col3" AND "col4" ' );

But this throws me an error  SQL: transaction rolled back by an internal error: Syntax Error in filter expression

Could anyone suggest the right syntax for this?

Thanks