CreateQuery test_merge (children 3)
 Identifier test_merge
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration x (children 1)
    DataType UInt64
   ColumnDeclaration t (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 2)
      NameTypePair a (children 1)
       DataType UInt32
      NameTypePair b (children 1)
       DataType UInt32
   ColumnDeclaration y (children 1)
    DataType String
 Storage definition (children 1)
  Function Merge (children 1)
   ExpressionList (children 2)
    Function currentDatabase (children 1)
     ExpressionList
    Literal \'test\'
