bit_or aggregate function
Applies to: 
Databricks SQL Databricks Runtime
Returns the bitwise OR of all input values in the group.
To aggregate bit positions into a BINARY bitmap use the bitmap_construct_agg() aggregate function.
To aggregate BINARY input values use the bitmap_or_agg()] aggregate function.
Syntax
bit_or(expr) [FILTER ( WHERE cond ) ]
This function can also be invoked as a window function using the OVER clause.
Arguments
expr: An expression that evaluates to an integral numeric.cond: An optional boolean expression filtering the rows used for aggregation.
Returns
The result type matches the argument type.
Examples
> SELECT bit_or(col) FROM VALUES (3), (5) AS tab(col);
7
> SELECT bit_or(col) FILTER(WHERE col < 8) FROM VALUES (3), (5), (8) AS tab(col);
7