CreateQuery matview_a_to_b (children 3)
 Identifier matview_a_to_b
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 2)
     Function toFloat64 (alias a) (children 1)
      ExpressionList (children 1)
       Identifier a
     Function plus (alias count) (children 1)
      ExpressionList (children 2)
       Identifier b
       Function sleepEachRow (children 1)
        ExpressionList (children 1)
         Literal Float64_0.000001
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier table_a
 ViewTargets
