pyflink.table.expression.Expression.map_union

Expression.map_union(*maps) → Expression

Returns a map created by merging at least one map. These maps should have a common map type. If there are overlapping keys, the value from ‘map2’ will overwrite the value from ‘map1’, the value from ‘map3’ will overwrite the value from ‘map2’, the value from ‘mapn’ will overwrite the value from ‘map(n-1)’. If any of maps is null, return null.

See also

map_union

Added in version 1.12.0.