Package SQLite

Class Vm

java.lang.Object
SQLite.Vm
public class Vm
extends Object
Class to represent compiled SQLite VM.

  • Field Summary

    Fields
    Modifier and Type Field Description
    protected int error_code
    Internal last error code for compile()/step() methods.

  • Constructor Summary

    Constructors
    Constructor Description
    Vm()  

  • Method Summary

    Modifier and Type Method Description
    boolean compile()
    Compile the next SQL statement for the SQLite VM instance.
    protected void finalize()
    Destructor for object.
    boolean step​(Callback cb)
    Perform one step on compiled SQLite VM.
    void stop()
    Abort the compiled SQLite VM.

    Methods inherited from class java.lang.Object

    clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • error_code

      protected int error_code
      Internal last error code for compile()/step() methods.

  • Constructor Details

    • Vm

      public Vm()

  • Method Details

    • step

      public boolean step​(Callback cb) throws Exception
      Perform one step on compiled SQLite VM. The result row is passed to the given callback interface.

      Example:
         ...
   try {
     Vm vm = db.compile("select * from x; select * from y;");
     while (vm.step(cb)) {
       ...
     }
     while (vm.compile()) {
       while (vm.step(cb)) {
         ...
       }
     }
   } catch (SQLite.Exception e) {
   }
      Parameters:
      cb - the object implementing the callback methods.
      Returns:
      true as long as more row data can be retrieved, false, otherwise.
      Throws:
      Exception

    • compile

      public boolean compile() throws Exception
      Compile the next SQL statement for the SQLite VM instance.
      Returns:
      true when SQL statement has been compiled, false on end of statement sequence.
      Throws:
      Exception

    • stop

      public void stop() throws Exception
      Abort the compiled SQLite VM.
      Throws:
      Exception

    • finalize

      protected void finalize()
      Destructor for object.
      Overrides:
      finalize in class Object