[SQL] implement MAP functions #1907
Description
- build MAP from a subquery that returns a pair of columns
- UNNEST [SQL] Implement UNNEST for MAP values #4198
- MAP_CONCAT
- MAP_CONTAINS_KEY
- MAP_ENTRIES
- MAP_KEYS [SQL] Advance Calcite; implement
MAP_KEYS#4962 - MAP_VALUES [SQL] Implement MAP_VALUES function #5114
- MAP_FROM_ARRAYS
- MAP_FROM_ENTRIES
- STR_TO_MAP
See also https://calcite.apache.org/docs/reference.html#dialect-specific-operators