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 Detail

error_code

protected int error_code

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

Constructor Detail

Vm

public Vm()

Method Detail

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