CreateQuery rollup (children 3)
 Identifier rollup
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration a (children 1)
    DataType String
   ColumnDeclaration b (children 1)
    DataType Int32
   ColumnDeclaration s (children 1)
    DataType Int32
 Storage definition (children 1)
  Function Memory