CreateQuery map_lc (children 3)
 Identifier map_lc
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration kv (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 1)
  Function Memory
