CreateQuery 02481_merge (children 3)
 Identifier 02481_merge
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration x (children 1)
    DataType UInt64
   ColumnDeclaration y (children 1)
    DataType UInt64
   ColumnDeclaration arr (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 1)
  Function Merge (children 1)
   ExpressionList (children 2)
    Function currentDatabase (children 1)
     ExpressionList
    Literal \'^(02481_mergetree)$\'
