Method for handling uncertainty of return results of trigger
A technology that returns results and uncertainty, applied in the direction of program control devices, etc., can solve problems such as increased background load, error reporting, and many fields in the data table, and achieve the effect of simplifying complex problems, accurate processing, and simple clarity
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[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0020] Currently, in the development of database triggers, cursors are usually used. Its main function is to return one or more records through some conditions, and calculate by extracting fields from the records, so as to achieve the purpose of database processing transactions independently. In the use of cursors, there is uncertainty in the number of results returned, and the trigger programming language is not as flexible and concise as other object-oriented development languages, so the application of triggers is not widespread, making some powerful databases Did not give full play to its powerful performance. In this solution, when using the implicit cursor, there is an attribute to handle exceptions, which is the key to solving the problem. It is precisely because the exception can be caught that we can know how many results the...
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