CreateQuery source_table (children 3)
 Identifier source_table
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration id (children 1)
    DataType UInt32
   ColumnDeclaration name (children 1)
    DataType String
   ColumnDeclaration value (children 1)
    DataType Float64
 Storage definition (children 2)
  Function MergeTree
  Identifier id
