CreateQuery 01681_database_for_flat_dictionary simple_key_complex_attributes_source_table (children 4)
 Identifier 01681_database_for_flat_dictionary
 Identifier simple_key_complex_attributes_source_table
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration id (children 1)
    DataType UInt64
   ColumnDeclaration value_first (children 1)
    DataType String
   ColumnDeclaration value_second (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 1)
  Function TinyLog