set allow_experimental_map_type = 1; -- String type drop table if exists table_map; create table table_map (a Map(String, String), b String) engine = Memory; insert into table_map values ({'name':'zhangsan', 'age':'10'}, 'name'), ({'name':'lisi', 'gender':'female'},'age'); select mapContains(a, 'name') from table_map; select mapContains(a, 'gender') from table_map; select mapContains(a, 'abc') from table_map; select mapContains(a, b) from table_map; select mapContains(a, 10) from table_map; -- { serverError 43 } select mapKeys(a) from table_map; drop table if exists table_map; CREATE TABLE table_map (a Map(UInt8, Int), b UInt8, c UInt32) engine = MergeTree order by tuple(); insert into table_map select map(number, number), number, number from numbers(1000, 3); select mapContains(a, b), mapContains(a, c), mapContains(a, 233) from table_map; select mapContains(a, 'aaa') from table_map; -- { serverError 43 } select mapContains(b, 'aaa') from table_map; -- { serverError 43 } select mapKeys(a) from table_map; select mapValues(a) from table_map; drop table if exists table_map; -- Const column select map( 'aa', 4, 'bb' , 5) as m, mapKeys(m), mapValues(m); select map( 'aa', 4, 'bb' , 5) as m, mapContains(m, 'aa'), mapContains(m, 'k'); select map(0, 0) as m, mapContains(m, number % 2) from numbers(2);