Avoid Cursor Problems in Oracle With Precompiled Queries

ADO and RDO do not support Oracle cursor types; neither Microsoft nor Oracle drivers provide appropriate conversion. As a result, you cannot use Oracle stored procedures from VB or Active Server Pages (ASP) to retrieve a multiple-row recordset. Instead, dynamic embedded SQL statements have to be passed. At this point, the performance degrades and the code becomes difficult to maintain. A better alternative?besides using a third-party driver?is to use precompiled (prepared) queries with parameters. These queries can be declared and precompiled when your application or component is first initialized (in the Sub Main, Initialize, or Load events, or include file).

Later, you can assign the parameters and call queries?including stored procedures consisting of single SQL statements?by their names. This approach can be faster (both in development and performance) for implementing business logic using VB built-in functionality instead of customized PL/SQL functions. It also can be applied with any RDBMS if you want to separate the database logic. (Queries are created by your component, are invisible in DBMS environment, and gone with your app). It’s also easier to adapt and port components against different RDBMS-modifying SQL statements to a particular dialect?or using standard SQL?than convert vendor specific “glue” languages such as PL/SQL or Transact-SQL.

Share the Post:
Share on facebook
Share on twitter
Share on linkedin


The Latest

iOS app development

The Future of iOS App Development: Trends to Watch

When it launched in 2008, the Apple App Store only had 500 apps available. By the first quarter of 2022, the store had about 2.18 million iOS-exclusive apps. Average monthly app releases for the platform reached 34,000 in the first half of 2022, indicating rapid growth in iOS app development.

microsoft careers

Top Careers at Microsoft

Microsoft has gained its position as one of the top companies in the world, and Microsoft careers are flourishing. This multinational company is efficiently developing popular software and computers with other consumer electronics. It is a dream come true for so many people to acquire a high paid, high-prestige job

your company's audio

4 Areas of Your Company Where Your Audio Really Matters

Your company probably relies on audio more than you realize. Whether you’re creating a spoken text message to a colleague or giving a speech, you want your audio to shine. Otherwise, you could cause avoidable friction points and potentially hurt your brand reputation. For example, let’s say you create a