CreateQuery t_nested_tuple (children 3)
 Identifier t_nested_tuple
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration endUserIDs (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 1)
      NameTypePair _experience (children 1)
       DataType Tuple (children 1)
        ExpressionList (children 2)
         NameTypePair aaid (children 1)
          DataType Tuple (children 1)
           ExpressionList (children 3)
            NameTypePair id (children 1)
             DataType Nullable (children 1)
              ExpressionList (children 1)
               DataType String
            NameTypePair namespace (children 1)
             DataType Tuple (children 1)
              ExpressionList (children 1)
               NameTypePair code (children 1)
                DataType LowCardinality (children 1)
                 ExpressionList (children 1)
                  DataType Nullable (children 1)
                   ExpressionList (children 1)
                    DataType String
            NameTypePair primary (children 1)
             DataType LowCardinality (children 1)
              ExpressionList (children 1)
               DataType Nullable (children 1)
                ExpressionList (children 1)
                 DataType UInt8
         NameTypePair mcid (children 1)
          DataType Tuple (children 1)
           ExpressionList (children 3)
            NameTypePair id (children 1)
             DataType Nullable (children 1)
              ExpressionList (children 1)
               DataType String
            NameTypePair namespace (children 1)
             DataType Tuple (children 1)
              ExpressionList (children 1)
               NameTypePair code (children 1)
                DataType LowCardinality (children 1)
                 ExpressionList (children 1)
                  DataType Nullable (children 1)
                   ExpressionList (children 1)
                    DataType String
            NameTypePair primary (children 1)
             DataType LowCardinality (children 1)
              ExpressionList (children 1)
               DataType Nullable (children 1)
                ExpressionList (children 1)
                 DataType UInt8
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList