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At least in this example, there's an easier approach than this. Remember that the optimizer is always trying to plan the query execution in a way that the path involving least amount of work necessary to retrieve a valid result set will be the path chosen. SELECT * FROM t1 WHERE (col1 = 'foo') OR (1 = 1); The server will always return all of the rows, ...


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So yes as you have mentioned about SQL injection the other advantage is what you guessed. Quoting from documentation: Using prepared statements with placeholders for parameter values has the following benefits: Less overhead for parsing the statement each time it is executed. Typically, database applications process large volumes of ...



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