Creates a map with the specified key-value pairs.
keyN: An expression of any comparable type. All
keyNmust share a least common type.
valueN: An expression of any type. All
valueNmust share a least common type.
A MAP with keys typed as the least common type of
keyN and values typed as the least common type of
There can be 0 or more pairs.
If there is a duplicate key or a NULL key the function raises an error.