CreateQuery source (children 3)
 Identifier source
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration Name (children 1)
    DataType String
   ColumnDeclaration Value (children 1)
    DataType Int64
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
