What kind of statements can't be prepared at server side?











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In MySQL, if I use useServerPrepStmts=true, then the driver will try to prepare a statement on the server if it believes it is possible to do that. In case the server is not able to prepare the statement (not all statements can be prepared at server side), a fall back to a 'client prepared statement' occurs.



I have two questions:




  • What kind of statements can't be prepared at server side?

  • Why does the driver sometimes think that the statement can be prepared at server side sending a COM_STMT_PREPARE (see here) to the server, if the server actually is not able to prepare that statement? Does that mean that sometimes the prepareability of a statement does depend on some predicate to be true on the server side and that's why the driver alone fails to make a correct decision?






java mysql jdbc relational-database database-administration







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    This partly answers your question: dev.mysql.com/worklog/task/?id=2871
    – Stephen C
    Nov 15 at 8:10















up vote
2
down vote

favorite
1












In MySQL, if I use useServerPrepStmts=true, then the driver will try to prepare a statement on the server if it believes it is possible to do that. In case the server is not able to prepare the statement (not all statements can be prepared at server side), a fall back to a 'client prepared statement' occurs.



I have two questions:




  • What kind of statements can't be prepared at server side?

  • Why does the driver sometimes think that the statement can be prepared at server side sending a COM_STMT_PREPARE (see here) to the server, if the server actually is not able to prepare that statement? Does that mean that sometimes the prepareability of a statement does depend on some predicate to be true on the server side and that's why the driver alone fails to make a correct decision?






java mysql jdbc relational-database database-administration







share|improve this question




















  • 1




    This partly answers your question: dev.mysql.com/worklog/task/?id=2871
    – Stephen C
    Nov 15 at 8:10













up vote
2
down vote

favorite
1









up vote
2
down vote

favorite
1






1





In MySQL, if I use useServerPrepStmts=true, then the driver will try to prepare a statement on the server if it believes it is possible to do that. In case the server is not able to prepare the statement (not all statements can be prepared at server side), a fall back to a 'client prepared statement' occurs.



I have two questions:




  • What kind of statements can't be prepared at server side?

  • Why does the driver sometimes think that the statement can be prepared at server side sending a COM_STMT_PREPARE (see here) to the server, if the server actually is not able to prepare that statement? Does that mean that sometimes the prepareability of a statement does depend on some predicate to be true on the server side and that's why the driver alone fails to make a correct decision?






java mysql jdbc relational-database database-administration







share|improve this question















In MySQL, if I use useServerPrepStmts=true, then the driver will try to prepare a statement on the server if it believes it is possible to do that. In case the server is not able to prepare the statement (not all statements can be prepared at server side), a fall back to a 'client prepared statement' occurs.



I have two questions:




  • What kind of statements can't be prepared at server side?

  • Why does the driver sometimes think that the statement can be prepared at server side sending a COM_STMT_PREPARE (see here) to the server, if the server actually is not able to prepare that statement? Does that mean that sometimes the prepareability of a statement does depend on some predicate to be true on the server side and that's why the driver alone fails to make a correct decision?






java mysql jdbc relational-database database-administration




java mysql jdbc relational-database database-administration






share|improve this question















share|improve this question













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edited Nov 15 at 10:27









Mark Rotteveel

58.7k1476119




58.7k1476119










asked Nov 15 at 6:58









Suren Aznauryan

36119




36119








  • 1




    This partly answers your question: dev.mysql.com/worklog/task/?id=2871
    – Stephen C
    Nov 15 at 8:10














  • 1




    This partly answers your question: dev.mysql.com/worklog/task/?id=2871
    – Stephen C
    Nov 15 at 8:10








1




1




This partly answers your question: dev.mysql.com/worklog/task/?id=2871
– Stephen C
Nov 15 at 8:10




This partly answers your question: dev.mysql.com/worklog/task/?id=2871
– Stephen C
Nov 15 at 8:10

















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