CreateQuery test_table (children 3)
 Identifier test_table
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration key_column (children 1)
    DataType UInt64
   ColumnDeclaration data_column_1 (children 1)
    DataType UInt64
   ColumnDeclaration data_column_2 (children 1)
    DataType UInt8
 Storage definition (children 2)
  Function MergeTree
  Identifier key_column
