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While both methods are perfectly legitimate, there is one major difference. When you prepare a SQL statement, you precompile it and substitute values using setInt(). When you hardcode the actually values, you have to precompile the SQL every time. Please note when it comes to Com_stmt_prepare and Com_stmt_execute only Com_stmt_execute would increment ...


The common solution is to express this as: interval '1 day' * ? with ? as a placeholder for a numeric value (possibly with a fractional part). The syntax tried in the question is rejected because for the SQL grammar, the entire expression interval '1 day' is a constant. It cannot be changed by injecting a placeholder into it, just like we couldn't write ...

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