SQLite prepared statements in AIR: compiled with sqlite3_prepare_v2 or sqlite3_prepare?

A set of specific conditions has to be met before SQLite will use an index when the LIKE operator is used in the statement:
http://www.sqlite.org/optoverview.html (see section 4.0).
One of those conditions is that the prepared statement has to be compiled with sqlite3_prepare_v2.
Is Adobe using sqlite3_prepare_v2 or sqlite3_prepare?
Thanks

Similar Messages

Binding in Prepared Statement is not working with Microsoft SQL Server JDBC

I ran the following program with sqljdbc4.jar in the class path. There is data in the EMPLOYEE table for the employee name DEMO but the following program is not retrieving data for DEMO. When the same program was run with Merlia.jar in the class path, it was retrieving data for DEMO.
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection con = DriverManager.getConnection("jdbc:sqlserver://SERVER23:5000;databaseName=TESTDB", "SYSADM", "SYSADM");
String sqlSele = "SELECT * FROM EMPLOYEE WHERE EMPNAME like ?" ;
PreparedStatement sts = con.prepareStatement(sqlSele);
sts.setString(1, "DEMO" );
ResultSet rs = sts.executeQuery();
while(rs.next())
System.out.println("driverConn.main()" + rs.toString());
catch(Exception e)
System.out.println(e);
e.printStackTrace();
Can someone help me out from this issue.

This is the program that I used for testing the behaviour of prepared statement with sqljdbc4.jar. Also included the code for Merlia.jar.
import java.sql.*;
public class driverConn {
     public static void main(String [] a)
          try{
          Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
          //Class.forName("com.inet.tds.TdsDriver");
          Connection con = DriverManager.getConnection("jdbc:sqlserver://SERVER23:5000;databaseName=TESTDB", "SYSADM", "SYSADM");
          //Connection con = DriverManager.getConnection("jdbc:inetdae7a:SERVER23:5000?database=TESTDB", "SYSADM", "SYSADM");
          String sqlSele = "SELECT * FROM EMPLOYEE WHERE EMPNAME like ?" ;
          //String sqlSele = "SELECT * FROM EMPLOYEE WHERE EMPNAME like ‘%DEMO%’”;
          PreparedStatement sts = con.prepareStatement(sqlSele);
          sts.setString(1, "DEMO" );
          //sts.setString(1, "%DEMO%" );
          java.sql.ResultSet rs = sts.executeQuery();
          while(rs.next())
               System.out.println("EMPNAME is " + rs.getString(“EMPNAME”) + “”);                    }
          catch(Exception e)
               System.out.println(e);
               e.printStackTrace();
Following are the specifications:
Version of the Driver:
Microsoft JDBC Driver 4.0 for SQL Server CTP3
Downloaded the driver using the link http://www.microsoft.com/download/en/details.aspx?id=11774
Java Version:
Java 1.7.0_02
Database Version:
Microsoft SQL Server 2008 (SP2) - 10.0.4000.0 (X64)

MS SQL Server 7 - Performance of Prepared Statements and Stored Procedures

Hello All,
Our team is currently tuning an application running on WL 5.1 SP 10 with a MS
SQL Server 7 DB that it accesses via the WebLogic jConnect drivers. The application
uses Prepared Statements for all types of database operations (selects, updates,
inserts, etc.) and we have noticed that a great deal of the DB host's resources
are consumed by the parsing of these statements. Our thought was to convert many
of these Prepared Statements to Stored Procedures with the idea that the parsing
overhead would be eliminated. In spite of all this, I have read that because
of the way that the jConnect drivers are implemented for MS SQL Server, Prepared
Statments are actually SLOWER than straight SQL because of the way that parameter
values are converted. Does this also apply to Stored Procedures??? If anyone
can give me an answer, it would be greatly appreciated.
Thanks in advance!

Joseph Weinstein <[email protected]> wrote:
>
>
Matt wrote:
Hello All,
Our team is currently tuning an application running on WL 5.1 SP 10with a MS
SQL Server 7 DB that it accesses via the WebLogic jConnect drivers.The application
uses Prepared Statements for all types of database operations (selects,updates,
inserts, etc.) and we have noticed that a great deal of the DB host'sresources
are consumed by the parsing of these statements. Our thought was toconvert many
of these Prepared Statements to Stored Procedures with the idea thatthe parsing
overhead would be eliminated. In spite of all this, I have read thatbecause
of the way that the jConnect drivers are implemented for MS SQL Server,Prepared
Statments are actually SLOWER than straight SQL because of the waythat parameter
values are converted. Does this also apply to Stored Procedures???If anyone
can give me an answer, it would be greatly appreciated.
Thanks in advance!Hi. Stored procedures may help, but you can also try MS's new free type-4
driver,
which does use DBMS optimizations to make PreparedStatements run faster.
Joe
Thanks Joe! I also wanted to know if setting the statement cache (assuming that
this feature is available in WL 5.1 SP 10) will give a boost for both Prepared Statements
and stored procs called via Callable Statements. Pretty much all of the Prepared
Statements that we are replacing are executed from entity bean transactions.
Thanks again

Help with streaming result sets and prepared statements

hi all
I create a callable statement that is capable of streaming.
statement = myConn2.prepareCall("{call graphProc(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)}",java.sql.ResultSet.TYPE_FORWARD_ONLY,
java.sql.ResultSet.CONCUR_READ_ONLY);
statementOne.setFetchSize(Integer.MIN_VALUE);
the class that contains the query is instantiated 6 times the first class streams the results beautifully and then when the second
rs = DatabaseConnect.statementOne.executeQuery();
is executed I get the following error
java.sql.SQLException: Can not use streaming results with multiple result statements
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:910)
at com.mysql.jdbc.MysqlIO.readAllResults(MysqlIO.java:1370)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1688)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3031)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:943)
at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1049)
at com.mysql.jdbc.CallableStatement.executeQuery(CallableStatement.java:589)
the 6 instances are not threaded and the result set is closed before the next query executes is there a solution to this problem it would be greatly appreciated
thanks a lot
Brian

Database resources should have the narrowed scope
possible. I don't think it's a good idea to use a
ResultSet in a UI to generate a graph. Load the data
into an object or data structure inside the method
that's doing the query and close the ResultSet in a
finally block. Use the data structure to generate
the graph.
It's an example of MVC and layering.
Ok that is my bad for not elaborating on the finer points sorry, the results are not directly streamed into the graphs from the result set. and are processed in another object and then plotted from there.
with regards to your statement in the beginning I would like to ask if you think it at least a viable option to create six connections. with that said would you be able to give estimated users using the six connections under full usage.
just a few thoughts that I want to
bounce off you if you don't mind. Closing the
statement would defeat the object of of having a
callable statement How so? I don't agree with that.
%again I apologise I assumed that since callable statements inherit from prepared statements that they would have the pre compiled sql statement functionality of prepared statements,well If you consider in the example I'm about to give maybe you will see my point at least with regards to this.
The statement that I create uses a connection and is created statically at the start of the program, every time I make a call the same statement and thus connection is used, creating a new connection each time takes up time and resources. and as you know every second counts
thanks for your thoughts
Brian.

Problem in Wilcard Search (%) with Prepared Statement

Hello Everyone,
Im trying to search using the like operator within a prepared statement. The program compiles , but when I execute it I get an empty result set.
I tried the same query in Query Analyser in SQL Server 2000 and it worked flawlessly.
I searched on this forum also and I read recommendations suggesting
to put the ? in like '?'   This gives me an error.
Ive tried all options I could get my hands on ,now I request you all to please provide me some guidance.
Thankyou
The code snippet is as follows :
          String sDay= "%"+startDay+"%";
                ps= con.prepareStatement("Select * from Testdb where days like ? ");
          ps.setString(1,sDay);
          As I said earlier, this query returns and empty result set.
Thankyou once again.

Its next to impossible for me to switch to Statement from prepared S. because the Query has got way to many conditions and its next to impossible to handle all those in a statement.
I had originally started out with statement itself but then I switched to prepared statement as it was getting unmanageable.
I'll try finding a work around whereby I split the query into two parts using the manageable part and the Wilcard search in the statement and the other unmanageable part in the PS.
Else I will again have to attempt that. I had also had a feeling this was affecting it.
Thanks for the help.
If anyone has some solution please post it .
Thank you.

Could not find prepared statement with handle %.

Greetings. I've seen several posts for this error on the web, but no clear cut answers. I captured the code below in profiler, with the intention of replaying in mgmt studio.
However, the attempt end in the following error: "Could not find prepared statement with handle 612."
declare @p1 int
set @p1=612
declare @p2 int
set @p2=0
declare @p7 int
set @p7=0
exec sp_cursorprepexec @p1 output,@p2 output,N'@P0 int,@P1 int,@P2 int,@P3 int,@P4 bit',N'EXEC dbo.mySproc @P0,@P1,@P2,@P3,@P4 ',4112,8193,@p7 output,219717,95,NULL,1,0
select @p1, @p2, @p7
Something noteworthy is that my sproc only has 5 input parameters, but this makes it look like it has many more.
How do I manipulate the code enough to make it work in mgmt studio? Thanks!
TIA, ChrisRDBA

In profiler you would normally see RPC:Starting and RPC:Completed. The statement shown in RPC staring is what you need to pick because as Erland explained, completed would show "funky" behavior.
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Batch updates with callable/prepared statement?

The document http://edocs.bea.com/wls/docs70/oracle/advanced.html#1158797 states
that "Using Batch updates with the callableStatement or preparedStatement is
not supported". What does that actually mean? We have used both callable and prepared
statements with the batch update in our current project (with the Oracle 817 db).
It seems to run ok anyway.

So the documentation should state that batch updates do not work ok in old versions
of JDriver for Oracle, BUT work correctly with newer version. Additionally, batch
updates work ok when used with Oracle supplied jdbc-drivers?
"Stephen Felts" <[email protected]> wrote:
Support for addBatch and executeBatch in the WLS Jdriver for Oracle was
added in 7.0SP2.
It was not available in 6.X or 7.0 or 7.0SP1.
"Janne" <[email protected]> wrote in message news:3edb0cdc$[email protected]..
The document http://edocs.bea.com/wls/docs70/oracle/advanced.html#1158797
states
that "Using Batch updates with the callableStatement or preparedStatementis
not supported". What does that actually mean? We have used both callableand prepared
statements with the batch update in our current project (with the Oracle817 db).
It seems to run ok anyway.

Error with ExecuteQuery() in prepared statement

Hello,
i' m a new one at java. I' m trying to build a web application in jsp and i have a problem in a simple at log in authentication.
My code is this:
<html>
<head>
<title>Welcome to the online Boat Shop, Inc.</title></head>
<body>
<%@ page language ="java" import = "java.io.*, java.lang.*, java.sql.*" %>
<% try
String strUsername = request.getParameter("USERNAME");
String strPassword = request.getParameter("PASSWORD");
Class.forName ("org.apache.derby.jdbc.ClientDriver");
Connection myConn = DriverManager.getConnection("jdbc:derby://localhost:1527/boatsdb","tony", "logo");
String strSQL = "SELECT USERNAME, PASSWORD FROM BOATDB where USERNAME = ? and PASSWORD = ?";
PreparedStatement stmt = myConn.prepareStatement(strSQL);
stmt.setString(1, "USERNAME");
stmt.setString(2, "PASSWORD");
ResultSet myResult = stmt.executeQuery(strSQL);
if(myResult.next()){
out.println("Login Succesful! A record with the given user name and password exists");
} else {
out.println("Login Failed. No records exists with the given user name and password");
myResult.close();
stmt.close();
myConn.close();
} catch(Exception e){
out.println(e);
%>
</body>
</html>
The problem is that prepared statement doesn't support executeQuery() method and i can find any solution. The error is this:
java.sql.SQLException: Method 'executeQuery(String)' not allowed on prepared statement. I already have some data in my database so that it can return results.
Thank you.
Edited by: antonis on May 3, 2008 6:13 AM

thank you, that was the problem. It seems that i have also done mistakes in passing the username and password from the forms to the database for checking, because the message that i get always when i log is that there is no user with this username kai password.
<form method=GET action=log1.jsp>
<font size=5> Username <input type=text name="USERNAME" size=20>
          </font>
          <br>
          <font size=5> Password <input type=text name="PASSWORD" size=20>
          </font>
          <br>
          <input type=submit name=action value="Submit">
</form>
That's the forms and combined with the code in the fist post should have worked. Any ideas?
thanks again.

Problem with Prepared Statement & MS Access

Hi
I have tried to find some info about this but can't see anything specific to what I think the problem may be. Hopefully someone can point me in the right direction.I am trying to get information out of an MS Access database using a Prepared Statement but I am getting strange results.
When I run the query in the database it gives me the correct totals (�51) for 4 records. When I run the Prepared Statement ,I get 81. Has it got anything to do with the data type I am using( sorry if this is a really basic question). here is my code- the connection etc is elsewhere.
private void getReportMoneyTotal() throws SQLException
          Calendar todayTotal =Calendar.getInstance() ;
           SimpleDateFormat reportDateFormat = new SimpleDateFormat("dd MM yyyy");
          PreparedStatement preparedT =context.getConnection().prepareStatement(
               "SELECT Sum(tblSession.Fee) AS Total, Count(tblBooking.BookingID) AS CountOfBookingID FROM tblSession INNER JOIN "+
               "(tblBooking INNER JOIN tblCustomer_Booking ON tblBooking.BookingID = tblCustomer_Booking.BookingID) ON tblSession.SessionID = tblBooking.SessionID "+
               "WHERE (((tblBooking.EventDate)>DateAdd('m',-1,#"+reportDateFormat.format(todayTotal.getTime())+"#)) AND ((tblSession.Session)='Morning' Or (tblSession.Session)='Evening')) OR (((tblSession.Session)='Afternoon') AND ((tblBooking.Extension)=Yes))"
          ResultSet resultTotal =preparedT.executeQuery();
          resultTotal.next();
          Double total =resultTotal.getDouble("Total");
          Locale locale = new Locale("GBP");
        NumberFormat gbpFormat = NumberFormat.getCurrencyInstance(locale);
          System.out.println(gbpFormat.format(total));
          preparedT.close();
     }I do realise that my code probably isn't very elegant but I'm only learning!

Hi Matt--
I am not clear if you are saving the url with the # # around
the text or if
the
data already contains the # marks.
When you insert a link, you want to make sure you insert is
insert into table ( link1) values ( <cfqueryparam
cfsqltype="cf_sql_varchar"
value='#linkvaluehere#'> )
remember to
1) enclose your data's value inside quotes (some databases
are picky about
single v. double quotes).
2) if it IS in quotes, swap doubles for singles and see if
that helps.
3) make sure your data being saved is NOT double hashed like
'##linkvalueher##'. Double ##'s tell
Coldfusion not to treat it as a variable.
hope his helps,
tami
"Mattastic" <[email protected]> wrote in
message
news:f9c7h0$8ub$[email protected]..
| Hi Folks,
|
| I'm storing a link in a nvarchar field in SQL server,
www.foo.co.uk, it
looks
| and works fine in SQL server. Problem occurs when I setup
an ADP in Access
and
| insert links. Certain links have a hash symbol around them.
so
|
http://www.foo.co.uk, would be #
http://www.foo.co.uk# which is
causing
problems.
|
| Can anyone tell me why this is happening? and how to stop
it?
|
| Thankyou
|

Autogenerated key with Prepared Statement...

Hi guys,
i've a question and i need help...
how can i retrieve autogenerated key with prepared Statement?
I see examples only about statements...please post me example code..

where i've to put STATEMENT.RETURN_GENERATED_KEYS?
I need to use executeUpdate()...I didn't put it anywhere. I just called the getGeneratedKeys() method without using that constant anywhere and it just worked.

Using once created prepared statement with different connections in Oracle

Can I use same statement cash using different connections in Oracle
For example I have a prepared statement p1. After its using i close connection (return it to the pool)
Next time I want use p1 statement using another connection.
Question : When I creat p1 in second time ,is it returned from cash or created as a new statement. And what I should do to use once prepared statement using differend connections.
Thaks.

As far as I know a PreparedStatement lives and dies with the Connection that created it. So, you cannot use a PreparedStatement with other Connection instances than the one that created it.
You will have to recreate the PreparedStatement for each time you open a connection, or use the same PreparedStatement and NOT close the Connection in between. The last suggestion can be risky though, if you never close the connection...
Jakob Jenkov
www.jenkov.com

Prepared Statement with SQL 'IN' Clause

Hi,
I am trying to write a JDBC SQL call to a database using a prepared statement, the call looks something like:
select *
from table
where field in (?, ? ,?)
this thing is that i don't know how many 'IN' parameters are needed until runtime (they come from a List), so is there an easy way of dealing with this, I haven't been able to find any information on this problem anywhere?

>
Hmmm...more expensive than say doing a query on on 2 billion rows with no index?
More expensive than doing a cross server join?
More expensive than doing a restore?
I knew that someone would point this out. :)
I just tried to exaggerate the importance of cursor sharing. This is one of the most important topic in DBMS world, but quite often ignored by JAVA world. I hope that you understand my good intention.
>
2. Insert data corresponding to bind variable to "T". Interesting idea. Please provide the algorithm for that. The only ones I can come up with
1. Involved creating a "dynamic" SQL for the insert
2. Doing multiple cross network inserts.
The first of course is exactly what you said your solution prevented. The second will be more expensive than sending a single dynamically created select.Hopefully, this is not just an "interesting" idea, but very common technique in DBMS. Actually one of the common techniques. There are couple of ways to handle this kind(variable number of bind variables in "IN" clause) of problem.
What i commented was that the simplest one. It's like this:
(based on Oracle)
SQL> create global temporary table bind_temp(value int);
PreparedStatement stmt = con.prepareStatement("INSERT INTO bid_temp VALUES(?)");
for(...) {
stmt.setInt(1, aValue)
stmt.addBatch();
stmt.executeBatch();
Statement stmt2 = con.executeQuery("SELECT * FROM target_table WHERE id IN (bind_temp)");
...Doesn't it look pretty? Pretty for both Java developers and DBAs.
By virtue of the mechanism of batch processing, the total DBMS call is just twice and you need just 2 completely sharable SQL statements.
(Hopefully you might understand that Oracle global temporary table is just session scope and we don't need them to be stored permanently)
Above pattern is quite beneficial than these pattern of queries.
SELECT * FROM target_table WHERE id IN (?)
SELECT * FROM target_table WHERE id IN (?,?)
SELECT * FROM target_table WHERE id IN (?,?,?)
SELECT * FROM target_table WHERE id IN (?,?,?,?,.......,?)
If you have large quantity of above patterns of queries, you should note that there are another bunch of better techniques. I noted just one of them.
Hope this clairfies my point.

Prepared Statement with ORDER BY

I am trying to use order by with prepared statement but it is not ordering.
String sql = "SELECT * FROM MATERIAL WHERE (LOWER(NAMEE) LIKE ('%' || ? || '%') ORDER BY ? ";
PreparedStatement ps=CM.getStatement(sql);
ps.setString(1,p);
ps.setString(2,sort);
ResultSet r = ps.executeQuery();
Can any one tell me how do I use prepared statement with order by

You can not parameterize column names and such, only literals. You should build the ORDER BY clause dynamically.

Prepared Statement with "INTERVAL ? DAY" clause

Hi,
I am having problems when using a INTERVAL ? DAY clause in a
preparedStatement in Oracle 8i with the classes12.zip jdbc
driver.
The code following code:
String sql1 =
"select from my_table where created_ts > SYSDATE -
INTERVAL '10' DAY";
String sql2 =
"select from my_table where created_ts > SYSDATE -
INTERVAL '?' DAY";
String sql3 =
"select from my_table where created_ts > SYSDATE -
INTERVAL ? DAY";
try {
st = con.prepareStatement(sql1);
ResultSet rs = st.executeQuery();
System.out.println("1 successful");
catch (Exception e) {
System.err.println(e);
try {
st = con.prepareStatement(sql2);
st.setInt(1, 10);
ResultSet rs = st.executeQuery();
System.out.println("2 successful");
catch (Exception e) {
System.err.println(e);
try {
st = con.prepareStatement(sql3);
st.setInt(1, 10);
ResultSet rs = st.executeQuery();
System.out.println("3 successful");
catch (Exception e) {
System.err.println(e);
produces this output:
1 successful
java.sql.SQLException: ORA-01036: illegal variable name/number
java.sql.SQLException: ORA-00933: SQL command not properly ended
Can anybody help me figuring out what's wrong with the 2nd or
3rd prepared statement?
Thanks
Bernie

Hi,
I am having problems when using a INTERVAL ? DAY clause in a
preparedStatement in Oracle 8i with the classes12.zip jdbc
driver.
The code following code:
String sql1 =
"select from my_table where created_ts > SYSDATE -
INTERVAL '10' DAY";
String sql2 =
"select from my_table where created_ts > SYSDATE -
INTERVAL '?' DAY";
String sql3 =
"select from my_table where created_ts > SYSDATE -
INTERVAL ? DAY";
try {
st = con.prepareStatement(sql1);
ResultSet rs = st.executeQuery();
System.out.println("1 successful");
catch (Exception e) {
System.err.println(e);
try {
st = con.prepareStatement(sql2);
st.setInt(1, 10);
ResultSet rs = st.executeQuery();
System.out.println("2 successful");
catch (Exception e) {
System.err.println(e);
try {
st = con.prepareStatement(sql3);
st.setInt(1, 10);
ResultSet rs = st.executeQuery();
System.out.println("3 successful");
catch (Exception e) {
System.err.println(e);
produces this output:
1 successful
java.sql.SQLException: ORA-01036: illegal variable name/number
java.sql.SQLException: ORA-00933: SQL command not properly ended
Can anybody help me figuring out what's wrong with the 2nd or
3rd prepared statement?
Thanks
Bernie

Count of Rows Updated with prepared statement batch

I am using a batch of prepared statements for update operation. (pstmt.executeBatch())
Configuration I am using
WLS 6.1sp2 Connection pool - Oracle Thin driver - TX Datasource
DB - Oracle 8.1.7
The batch update works well i.e data gets updated and committed. BUT I am not
getting back the count of number of rows updated.
Is there any thing more required on WLS side ?
Thanks in Advance

The Oracle drivers do not return the updated row counts from batched updates.
Try running the attached program with the thin driver
java Batch oracle.jdbc.driver.OracleDriver jdbc:oracle:thin:@host:port:database user password
You will see that returns -2, which indicates that the number of rows updated is unknown.
This does meet the JDBC spec.
"Harshad Nanal" <[email protected]> wrote in message news:3f8a455f$[email protected]..
>
I am using a batch of prepared statements for update operation. (pstmt.executeBatch())
Configuration I am using
WLS 6.1sp2 Connection pool - Oracle Thin driver - TX Datasource
DB - Oracle 8.1.7
The batch update works well i.e data gets updated and committed. BUT I am not
getting back the count of number of rows updated.
Is there any thing more required on WLS side ?
Thanks in Advance[Batch.java]

SQLite prepared statements in AIR: compiled with sqlite3_prepare_v2 or sqlite3_prepare?

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