CreateQuery t_map_lc (children 3)
 Identifier t_map_lc
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType UInt64
   ColumnDeclaration t (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 1)
      NameTypePair m (children 1)
       DataType Map (children 1)
        ExpressionList (children 2)
         DataType LowCardinality (children 1)
          ExpressionList (children 1)
           DataType String
         DataType LowCardinality (children 1)
          ExpressionList (children 1)
           DataType String
 Storage definition (children 3)
  Function MergeTree
  Identifier id
  Set
