Performance problems with JDBC and mysql

Hi,
I have here a "one table" database which has 1.000.000 data rows. The problem is, that deleting a special entry (ie delete from mytable where da_value="foo1") takes between 10 and 60 seconds.
Does anyone can help me out of this performance trap.
LoCal

table indexed and keys used?
always preferred postgres! :)

Similar Messages

Problem with BigInteger and MySql

Hi !!
I've a problem with BigInteger and MySql.
I've a BigInteger object (suppose that value is 0.02270412445068359375).
I must store that value in a database (MySql).
The value of BigInteger object must be stored in a column of type Decimal.
Stored value is 0.022704124450683594. Why ??
My target is to store 0.02270412445068359375
Can anyone help me?
Thanks.

Hi !!
I've a problem with BigInteger and MySql.
I've a BigInteger object (suppose that value is
0.02270412445068359375).
I must store that value in a database (MySql).
The value of BigInteger object must be stored in a
column of type Decimal.if this is the case I fear you are SOL. a decimal is the same size as a double but with a fixed max number of decimal places. if it isn't big enough then you have no real choice other than to VARCHAR it.
Stored value is 0.022704124450683594. Why ??
My target is to store 0.02270412445068359375
Can anyone help me?
Thanks.

[URGENT] Performance problem with BC4J and partioned data

Hi all,
I have a big performance probelm with BC4J and partitioned data. As as partitioned table shouldn't have a primary key like a sequence (or something else) my partitioned table doesn't have any primary key.
When I debug my BC4J application I can see a message showing me "ignoring row with no primary key" from EntityCache. It takes a long time to retrieve my data even if I use the partition keys. A quick & dirty forms application was multiple times faster!
Is this a bug in BC4J, or is BC4J not suitable for partitioned data? Can anyone give me a hint what to do, do make the BC4J application fast even with partitioned data? In a non-partitioned environment the application works quite well. So it seams that it must be an "error" somewhere in this part.
Thanks,
Axel

Here's a SQL statement that creates the table.
CREATE TABLE SEARCH
(SEAR_PARTKEY_DAY              NUMBER(4)        NOT NULL
,SEAR_PARTKEY_EMP            VARCHAR2(2)      NOT NULL
,SEAR_ID                     NUMBER(20)       NOT NULL
,SEAR_ENTRY_DATE             TIMESTAMP        NOT NULL
,SEAR_LAST_MODIFIED            TIMESTAMP             NOT NULL
,SEAR_STATUS                 VARCHAR2(100)    DEFAULT '0'
,SEAR_ITC_DATE               TIMESTAMP        NOT NULL
,SEAR_MESSAGE_CLASS          VARCHAR2(15)     NOT NULL
,SEAR_CHIPHERING_TYPE        VARCHAR2(256)
,SEAR_GMAT                   VARCHAR2(1)      DEFAULT 'U'
,SEAR_NATIONALITY            VARCHAR2(3)      DEFAULT 'XXX'
,SEAR_MESSAGE_ID             VARCHAR2(32)     NOT NULL
,SEAR_COMMENT                VARCHAR2(256)    NOT NULL
,SEAR_NUMBER_OF              NUMBER(3)        NOT NULL
,SEAR_INTERCEPTION_SYSTEM    VARCHAR2(40)
,SEAR_COMM_PRIOD_H           NUMBER(5)        DEFAULT -1
,SEAR_PRIOD_R                  NUMBER(5)        DEFAULT -1
,SEAR_INMARSAT_CES           VARCHAR2(40)
,SEAR_BEAM                   VARCHAR2(10)
,SEAR_DIALED_NUMBER          VARCHAR2(70)
,SEAR_TRANSMIT_NUMBER        VARCHAR2(70)
,SEAR_CALLED_NUMBER          VARCHAR2(40)
,SEAR_CALLER_NUMBER          VARCHAR2(40)
,SEAR_MATERIAL_TYPE          VARCHAR2(3)      NOT NULL
,SEAR_SOURCE                 VARCHAR2(10)
,SEAR_MAPPING                VARCHAR2(100)    DEFAULT '__REST'
,SEAR_DETAIL_MAPPING         VARCHAR2(100)
,SEAR_PRIORITY               NUMBER(3)        DEFAULT 255
,SEAR_LANGUAGE               VARCHAR2(5)      DEFAULT 'XXX'
,SEAR_TRANSMISSION_TYPE      VARCHAR2(40)
,SEAR_INMARSAT_STD           VARCHAR2(1)
,SEAR_FILE_NAME              VARCHAR2(100)    NOT NULL
PARTITION BY RANGE (SEAR_PARTKEY_DAY, SEAR_PARTKEY_EMP)
PARTITION SEARCH_MAX VALUES LESS THAN (MAXVALUE, MAXVALUE) MIRA4_SEARCH_EVEN
);of course SEAR_ID is filled by a sequence but the field is not the primary key as it would decrease the performance of partitioned data.
We moved to native JDBC with our application and the performance is like we never expected to be!

Problem with JDBC and VARCHAR-Columns

Hi,
i have a problem handling VARCHAR-Columns via JDBC.
I.e. by using the JDBC-components of <SunONE Community Edition Update 1> any attempt to store any other then numeric values (like "0", "01", "999" etc.) in a column of type VARCHAR results in an error.
After entering the string "test" in a JTextArea or JTextField (which is linked by its document to the VARCHAR-column) i will receive:
"java.lang.NumberFormatException: For input string: "st"/For input string: "st". I also tried the javax.sql. rowSet methods like updateString() with the same result.
Are there any knwon issues corresponding to this behaviour?
Configuration details:
JDBC-Driver:
package com.sap.dbtech.jdbc, MaxDB JDBC Driver, MySQL MaxDB, 7.5.1 Build 000-000-002-750 on Java 1.4.2
Database-version:
7.5.00.16 on WindowsXP Pro SP1
JRE:
1.4.1_02
The trace-file only show this statements:
[email protected] (UPDATE NOTARZTEINSATZPROTOKOLL_1 SET NEUROLOGISCHER_ERSTBEFUND = ? WHERE NAP_ID = ? AND EP_ID = ? AND BEMERKUNG IS NULL AND SOZ_ID IS NULL AND PSYZ_ID IS NULL AND ERSTBEFUND_ZEITPUNKT IS NULL AND GCSAO_ID_EB IS NULL AND GCSBVR_ID_EB IS NULL AND GCSBMR_ID_ARMLINKS_EB IS NULL AND GCSBMR_ID_ARMRECHTS_EB IS NULL AND GCSBMR_ID_BEINLINKS_EB IS NULL AND GCSBMR_ID_BEINRECHTS_EB IS NULL AND BWSL_ID_EB IS NULL AND EXTB_ID_ARMLINKS_EB IS NULL AND EXTB_ID_ARMRECHTS_EB IS NULL AND EXTB_ID_BEINLINKS_EB IS NULL AND EXTB_ID_BEINRECHTS_EB IS NULL AND PUPW_ID_LINKS_EB IS NULL AND PUPW_ID_RECHTS_EB IS NULL AND EJN_ID_FEHLTLICHTR_LI_EB IS NULL AND EJN_ID_FEHLTLICHTR_RE_EB IS NULL AND EJN_ID_MENINGISMUS_EB IS NULL AND NEUROLOGISCHER_ERSTBEFUND IS NULL AND TEMPERATUR_EB IS NULL AND RR_SYSTOLISCH_EB IS NULL AND RR_DIASTOLISCH_EB IS NULL AND HERZFREQUENZ_EB IS NULL AND EJN_ID_HF_REGELM_EB IS NULL AND BLUTZUCKER_EB IS NULL AND ATEMFREQUENZ_EB IS NULL AND SPO2_EB IS NULL AND CO2_EB IS NULL AND SCHM_ID_EB IS NULL AND ERH_ID_COR_EB IS NULL AND EELS_ID_COR_EB IS NULL AND EJN_ID_EKG_EMENTKOPPEL_EB IS NULL AND EERBST_ID_COR_EB IS NULL AND EHA_ID_COR_EB IS NULL AND ESVES_ID_COR_EB IS NULL AND EVES_ID_COR_EB IS NULL AND EKG_BEMERKUNG_EB IS NULL AND ATRH_ID_EB IS NULL AND EJN_ID_ZYANOSE_EB IS NULL AND EJN_ID_SPASTIK_EB IS NULL AND EJN_ID_RASSELGER_EB IS NULL AND EJN_ID_STRIDOR_EB IS NULL AND EJN_ID_VERLEGATEMW_EB IS NULL AND BEAM_ID_UEBERNAHME IS NULL AND ATMUNG_FREITEXT_EB IS NULL AND VERLM_ID IS NULL AND SCHWV_ID_SCHAEDELHIRN IS NULL AND SCHWV_ID_GESICHT IS NULL AND SCHWV_ID_HWS IS NULL AND SCHWV_ID_THORAX IS NULL AND SCHWV_ID_ABDOMEN IS NULL AND SCHWV_ID_BWSLWS IS NULL AND SCHWV_ID_BECKEN IS NULL AND SCHWV_ID_OEXTREMITAET IS NULL AND SCHWV_ID_UEXTREMITAET IS NULL AND SCHWV_ID_WEICHTEILE IS NULL AND VBRT_ID IS NULL AND TRT_ID IS NULL AND UHG_ID IS NULL AND SICHTK_ID IS NULL AND UNFALLZEITPUNKT IS NULL AND SAPS_2 IS NULL AND TISS_28 IS NULL AND NACA_ID IS NULL AND ZBV IS NULL )
=> com.sap.dbtech.jdbc.CallableStatementSapDB@11daf60
<at this position the trace-file ends?!; "NEUROLOGISCHER_ERSTBEFUND ist defined as
"NEUROLOGISCHER_ERSTBEFUND" Varchar (1000) ASCII; i also encountered this problem while handling shorter VARCHAR-columns with JComboBox-components...>
Any information would be very helpfully!!!
Greetings,
Arnd
Message was edited by: Arnd Benninghoff
Message was edited by: Arnd Benninghoff

Hi Arnd,
if I understand right you are trying to insert/update value into a Varchar(1000) column. And if you set a non numeric value you get an exception "java.lang.NumberFormatException", Right?
Of course this should work with MaxDB. The exception you get doesn't come from MaxDB's JDBC driver. The driver will only throw exceptions that are derived from java.sql.Exception.
So, I guess the error comes from a layer above the JDBC layer, possibly from the JDBC-components of <SunONE Community Edition Update 1>. This would also explain why you don't see any exception in the JDBC trace.
Did you have defined any constraints for the input field (JTextArea or JTextField)?
Hope that helps.
regards,
Marco

Performance problems with XMLTABLE and XMLQUERY involving relational data

Hello-
Is anyone out there using XMLTABLE or XMLQUERY with more than a toy set of data? I am running into serious performance problems tyring to do basic things such as:
* Combine records in 10 relational tables into a single table of XMLTYPE records using XMLTABLE. This hangs indefinitely for any more than 800 records. Oracle has confirmed that this is a problem and is working on a fix.
* Combine a single XMLTYPE record with several relational code tables into a single XMLTYPE record using XMLQUERY and ora:view() to insert code descriptions after each code. Performance is 10 seconds for 10 records (terrible) passing a batch of records , or 160 seconds for one record (unacceptable!). How can it take 10 times longer to process 1/10th the number of records? Ironically, the query plan says it will do a full table scan of records for the batch, but an index access for the one record passed to the XMLQUERY.
I am rapidly losing faith in XML DB, and desparately need some hints on how to work around these performance problems, or at least some assurance that others have been able to get this thing to perform.

<Note>Long post, sorry.</Note>
First, thanks for the responses above. I'm impressed with the quality of thought put into them. (Do the forum rules allow me to offer rewards? :) One suggestion in particular made a big performance improvement, and I’m encouraged to hear of good performance in pure XML situations. Unfortunately, I think there is a real performance challenge in two use cases that are pertinent to the XML+relational subject of this post and probably increasingly common as XML DB usage increases:
• Converting legacy tabular data into XML records; and
• Performing code table lookups for coded values in XML records.
There are three things I want to accomplish with this post:
• Clarify what we are trying to accomplish, which might expose completely different approaches than I have tried
• Let you know what I tried so far and the rationale for my approach to help expose flaws in my thinking and share what I have learned
• Highlight remaining performance issues in hopes that we can solve them
What we are trying to accomplish:
• Receive a monthly feed of 10,000 XML records (batched together in text files), each containing information about an employee, including elements that repeat for every year of service. We may need to process an annual feed of 1,000,000 XML records in the future.
• Receive a one-time feed of 500,000 employee records stored in about 10 relational tables, with a maximum join depth of 2 or 3. This is inherently a relational-to-XML process. One record/second is minimally acceptable, but 10 records/sec would be better.
• Consolidate a few records (from different providers) for each employee into a single record. Given the data volume, we need to achieve a minimum rate of 10 records per second. This may be an XML-only process, or XML+relational if code lookups are done during consolidation.
• Allow the records to be viewed and edited, with codes resolved into user-friendly descriptions. Since a user is sitting there, code lookups done when a record is viewed (vs. during consolidation) should not take more than 3 seconds total. We have about 20 code tables averaging a few hundred rows each, though one has 450,000 rows.
As requested earlier, I have included code at the end of this post for example tables and queries that accurately (but simply) replicate our real system.
Why we did and why:
• Stored the source XML records as CLOBS: We did this to preserve the records exactly as they were certified and sent from providers. In addition, we always access the entire XML record as a whole (e.g., when viewing a record or consolidating employee records), so this storage model seemed like a good fit. We can copy them into another format if necessary.
• Stored the consolidated XML employee records as “binary XML”. We did this because we almost always access a single, entire record as a whole (for view/edit), but might want to create some summary statistics at some point. Binary XML seemed the best fit.
• Used ora:view() for both tabular source records and lookup tables. We are not aware of any alternatives at this time. If it made sense, most code tables could be pre-converted into XML documents, but this seemed risky from a performance standpoint because the lookups use both code and date range constraints (the meaning of codes changes over time).
• Stored records as XMLTYPE columns in a table with other key columns on the table, plus an XMLTYPE metadata column. We thought this would facilitate pulling a single record (or a few records for a given employee) quickly. We knew this might be unnecessary given XML indexes and virtual columns, but were not experienced with those and wanted the comfort of traditional keys. We did not used XMLTYPE tables or the XML Repository for documents.
• Used XMLTABLE to consolidate XML records by looping over each distinct employee ID in the source batch. We also tried XMLQUERY and it seems to perform about the same. We can achieve 10 to 20 records/second if we do not do any code lookups during consolidation, just meeting our performance requirement, but still much slower than expected.
• Used PL/SQL with XMLFOREST to convert tabular source records to XML by looping over distinct employee IDs. We tried this outside PL/SQL both with XMLFOREST and XMLTABLE+ora:view(), but it hangs in both cases for more than 800 records (a known/open issue). We were able to get it to work by using an explicit cursor to loop over distinct employee IDs (rather than processing all records at once within the query). The performance is one record/second, which is minimally acceptable and interferes with other database activity.
• Used XMLQUERY plus ora:view() plus XPATH constraints to perform code lookups. When passing a single employee record, the response time ranges from 1 sec to 160 sec depending on the length of the record (i.e., number of years of service). We achieved a 5-fold speedup using an XMLINDEX (thank you Marco!!). The result may be minimally acceptable, but I’m baffled why the index would be needed when processing a single XML record. Other things we tried: joining code tables in the FOR...WHERE clauses, joining code tables using LET with XPATH constraints and LET with WHERE clause constraints, and looking up codes individually via JDBC from the application code at presentation time. All those approaches were slower. Note: the difference I mentioned above in equality/inequality constraint performance was due to data record variations not query plan variations.
What issues remain?
We have a minimally acceptable solution from a performance standpoint with one very awkward PL/SQL workaround. The performance of a mixed XML+relational data query is still marginal IMHO, until we properly utilize available optimizations, fix known problems, and perhaps get some new query optimizations. On the last point, I think the query plan for tabular lookups of codes in XML records is falling short right now. I’m reminded of data warehousing in the days before hash joins and star join optimization. I would be happy to be wrong, and just as happy for viable workarounds if I am right!
Here are the details on our code lookup challenge. Additional suggestions would be greatly appreciated. I’ll try to post more detail on the legacy table conversion challenge later.
-- The main record table:
create table RECORDS (
SSN varchar2(20),
XMLREC sys.xmltype
xmltype column XMLREC store as binary xml;
create index records_ssn on records(ssn);
-- A dozen code tables represented by one like this:
create table CODES (
CODE varchar2(4),
DESCRIPTION varchar2(500)
create index codes_code on codes(code);
-- Some XML records with coded values (the real records are much more complex of course):
-- I think this took about a minute or two
DECLARE
ssn varchar2(20);
xmlrec xmltype;
i integer;
BEGIN
xmlrec := xmltype('<?xml version="1.0"?>
<Root>
<Id>123456789</Id>
<Element>
<Subelement1><Code>11</Code></Subelement1>
<Subelement2><Code>21</Code></Subelement2>
<Subelement3><Code>31</Code></Subelement3>
</Element>
<Element>
<Subelement1><Code>11</Code></Subelement1>
<Subelement2><Code>21</Code></Subelement2>
<Subelement3><Code>31</Code></Subelement3>
</Element>
<Element>
<Subelement1><Code>11</Code></Subelement1>
<Subelement2><Code>21</Code></Subelement2>
<Subelement3><Code>31</Code></Subelement3>
</Element>
</Root>
for i IN 1..100000 loop
insert into records(ssn, xmlrec) values (i, xmlrec);
end loop;
commit;
END;
-- Some code data like this (ignoring date ranges on codes):
DECLARE
description varchar2(100);
i integer;
BEGIN
description := 'This is the code description ';
for i IN 1..3000 loop
insert into codes(code, description) values (to_char(i), description);
end loop;
commit;
end;
-- Retrieve one record while performing code lookups. Takes about 5-6 seconds...pretty slow.
-- Each additional lookup (times 3 repeating elements in the data) adds about 1 second.
-- A typical real record has 5 Elements and 20 Subelements, meaning more than 20 seconds to display the record
-- Note we are accessing a single XML record based on SSN
-- Note also we are reusing the one test code table multiple times for convenience of this test
select xmlquery('
for $r in Root
return
<Root>
<Id>123456789</Id>
{for $e in $r/Element
 return
 <Element>
 <Subelement1>
 {$e/Subelement1/Code}
<Description>
{ora:view("disaac","codes")/ROW[CODE=$e/Subelement1/Code]/DESCRIPTION/text() }
</Description>
</Subelement1>
<Subelement2>
{$e/Subelement2/Code}
<Description>
{ora:view("disaac","codes")/ROW[CODE=$e/Subelement2/Code]/DESCRIPTION/text()}
</Description>
</Subelement2>
<Subelement3>
{$e/Subelement3/Code}
<Description>
{ora:view("disaac","codes")/ROW[CODE=$e/Subelement3/Code]/DESCRIPTION/text() }
</Description>
</Subelement3>
</Element>
</Root>
' passing xmlrec returning content)
from records
where ssn = '10000';
The plan shows the nested loop access that slows things down.
By contrast, a functionally-similar SQL query on relational data will use a hash join and perform 10x to 100x faster, even for a single record. There seems to be no way for the optimizer to see the regularity in the XML structure and perform a corresponding optimization in joining the code tables. Not sure if registering a schema would help. Using structured storage probably would. But should that be necessary given we’re working with a single record?
Operation Object
|SELECT STATEMENT ()
| SORT (AGGREGATE)
| NESTED LOOPS (SEMI)
| TABLE ACCESS (FULL) CODES
| XPATH EVALUATION ()
| SORT (AGGREGATE)
| NESTED LOOPS (SEMI)
| TABLE ACCESS (FULL) CODES
| XPATH EVALUATION ()
| SORT (AGGREGATE)
| NESTED LOOPS (SEMI)
| TABLE ACCESS (FULL) CODES
| XPATH EVALUATION ()
| SORT (AGGREGATE)
| XPATH EVALUATION ()
| SORT (AGGREGATE)
| XPATH EVALUATION ()
| TABLE ACCESS (BY INDEX ROWID) RECORDS
| INDEX (RANGE SCAN) RECORDS_SSN
With an xmlindex, the same query above runs in about 1 second, so is about 5x faster (0.2 sec/lookup), which is almost good enough. Is this the answer? Or is there a better way? I’m not sure why the optimizer wants to scan the code tables and index into the (one) XML record, rather than the other way around, but maybe that makes sense if the optimizer wants to use the same general plan as when the WHERE clause constraint is relaxed to multiple records.
-- Add an xmlindex. Takes about 2.5 minutes
create index records_record_xml ON records(xmlrec)
indextype IS xdb.xmlindex;
Operation Object
|SELECT STATEMENT ()
| SORT (GROUP BY)
| FILTER ()
| NESTED LOOPS ()
| FAST DUAL ()
| TABLE ACCESS (BY INDEX ROWID) SYS113473_RECORDS_R_PATH_TABLE
| INDEX (RANGE SCAN) SYS113473_RECORDS_R_PATHID_IX
| SORT (AGGREGATE)
| FILTER ()
| TABLE ACCESS (FULL) CODES
| FILTER ()
| NESTED LOOPS ()
| FAST DUAL ()
| TABLE ACCESS (BY INDEX ROWID) SYS113473_RECORDS_R_PATH_TABLE
| INDEX (RANGE SCAN) SYS113473_RECORDS_R_PATHID_IX
| SORT (GROUP BY)
| FILTER ()
| NESTED LOOPS ()
| FAST DUAL ()
| TABLE ACCESS (BY INDEX ROWID) SYS113473_RECORDS_R_PATH_TABLE
| INDEX (RANGE SCAN) SYS113473_RECORDS_R_PATHID_IX
| SORT (AGGREGATE)
| FILTER ()
| TABLE ACCESS (FULL) CODES
| FILTER ()
| NESTED LOOPS ()
| FAST DUAL ()
| TABLE ACCESS (BY INDEX ROWID) SYS113473_RECORDS_R_PATH_TABLE
| INDEX (RANGE SCAN) SYS113473_RECORDS_R_PATHID_IX
| SORT (GROUP BY)
| FILTER ()
| NESTED LOOPS ()
| FAST DUAL ()
| TABLE ACCESS (BY INDEX ROWID) SYS113473_RECORDS_R_PATH_TABLE
| INDEX (RANGE SCAN) SYS113473_RECORDS_R_PATHID_IX
| SORT (AGGREGATE)
| FILTER ()
| TABLE ACCESS (FULL) CODES
| FILTER ()
| NESTED LOOPS ()
| FAST DUAL ()
| TABLE ACCESS (BY INDEX ROWID) SYS113473_RECORDS_R_PATH_TABLE
| INDEX (RANGE SCAN) SYS113473_RECORDS_R_PATHID_IX
| SORT (AGGREGATE)
| FILTER ()
| NESTED LOOPS ()
| FAST DUAL ()
| TABLE ACCESS (BY INDEX ROWID) SYS113473_RECORDS_R_PATH_TABLE
| INDEX (RANGE SCAN) SYS113473_RECORDS_R_PATHID_IX
| SORT (AGGREGATE)
| TABLE ACCESS (BY INDEX ROWID) SYS113473_RECORDS_R_PATH_TABLE
| INDEX (RANGE SCAN) SYS113473_RECORDS_R_PATHID_IX
| TABLE ACCESS (BY INDEX ROWID) RECORDS
| INDEX (RANGE SCAN) RECORDS_SSN
Am I on the right path, or am I totally using the wrong approach? I thought about using XSLT but was unsure how to reference the code tables.
I’ve done the best I can constraining the main record to a single row passed to the XMLQUERY. Given Mark’s post (thanks!) should I be joining and constraining the code tables in the SQL WHERE clause too? That’s going to make the query much more complicated, but right now we’re more concerned about performance than complexity.

Problems with JSP and MySql bean.

Hi,
I'm new to JSP and I'm having some problems with it. I'm trying to do a simple login where a java class (bean?) handles the SQL injektion. I have deployed the page on tomcat and it works fine, except that the sqlinjektion does basically nothing. I have installed the mysql driver. I think there is something wrong with the java class, or the way im calling it. It does not produce any error. But its like it would never actually process the java code, because ive tried to append things to error string to see what is going on, nothing happens. everything stay null, no exceptions are thrown. If I implement the code to JSP itself, it does load the driver and print exception that there is no connection to database (which is correct). What am I missing? Code follows:
the sqlhandler:
public abstract class SqlInjektor {
 private static String Database = "*****";
 private static String serverName = "localhost:3306";
 private static String usrName="******";
 private static String passw="******";
 * @return Connection
 public static Connection createConnection(String error){
 Connection mySqlCon = null;
 try{
 Class.forName("com.mysql.jdbc.Driver").newInstance();
 catch(Exception E){
 PrintWriter out = response.getWriter();
 out.println("lol");
 String url = "jdbc:mysql://" + serverName + "/" + Database + "?user=" + usrName + "&password=" + passw;
 try{
 mySqlCon = DriverManager.getConnection(url);
 catch (Exception E){
 E.printStackTrace(System.out);
 return mySqlCon;
 * Metodi saa sy�tteen��n SQL komennon, jonka se suorittaa sek� palauttaa komennon tulokset.
 * @param command
 * @return ResultSet
 public static ResultSet querySQL(String command,String error, Connection con){
 ResultSet rs = null;
 try{
 Statement stmt = con.createStatement();
 rs = stmt.executeQuery(command);
 catch(Exception E){
 E.printStackTrace(System.out);
 return rs;
the jsp page:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page isErrorPage="false" %>
<%@ page import="java.sql.*" %>
<%@page import="ot3.User"%>
<%@page import="ot3.SqlInjektor"%>
<%@page import="Javax.servlet.jsp.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>vastaanotto</title>
</head>
<body>
<%! String id;
 String password;
 String error = new String("Error!\n");
 User user;
%>
<% user = new User();
 session.putValue("currentUser",user);
 id = request.getParameter("authName");
password = request.getParameter("Password");
 Connection conn=null;
 ResultSet rs=null;
 conn = SqlInjektor.createConnection(error);
 if(conn!=null){
 out.println("conn ok!");
 rs = SqlInjektor.querySQL("SELECT * FROM user WHERE id='" + id +"' AND password='" + password+"' COLLATE latin1_bin;",error,conn);}
 try {
 if (rs!= null && rs.next()){
 user.setID(rs.getInt("id"));
 user.setName(rs.getString("name"));
 user.setPassword(rs.getString("password"));
 user.setClearance(rs.getInt("clearance"));
 if(rs.getString("addedby")!=null)
 user.setAdder(rs.getInt("addedby"));
 if(rs.getString("lastmodifier")!=null)
 user.setModifier(rs.getInt("lastmodifier"));
 rs.close();%>
 ONNISTU!
 <%}
 else {
 out.println(error);
 } catch (SQLException e) {
 out.println(e.getMessage());
 }%>
</body>
</html>

Hi,
I'm new to JSP and I'm having some problems with it. I'm trying to do a simple login where a java class (bean?) handles the SQL injektion. I have deployed the page on tomcat and it works fine, except that the sqlinjektion does basically nothing. I have installed the mysql driver. I think there is something wrong with the java class, or the way im calling it. It does not produce any error. But its like it would never actually process the java code, because ive tried to append things to error string to see what is going on, nothing happens. everything stay null, no exceptions are thrown. If I implement the code to JSP itself, it does load the driver and print exception that there is no connection to database (which is correct). What am I missing? Code follows:
the sqlhandler:
public abstract class SqlInjektor {
 private static String Database = "*****";
 private static String serverName = "localhost:3306";
 private static String usrName="******";
 private static String passw="******";
 * @return Connection
 public static Connection createConnection(String error){
 Connection mySqlCon = null;
 try{
 Class.forName("com.mysql.jdbc.Driver").newInstance();
 catch(Exception E){
 PrintWriter out = response.getWriter();
 out.println("lol");
 String url = "jdbc:mysql://" + serverName + "/" + Database + "?user=" + usrName + "&password=" + passw;
 try{
 mySqlCon = DriverManager.getConnection(url);
 catch (Exception E){
 E.printStackTrace(System.out);
 return mySqlCon;
 * Metodi saa sy�tteen��n SQL komennon, jonka se suorittaa sek� palauttaa komennon tulokset.
 * @param command
 * @return ResultSet
 public static ResultSet querySQL(String command,String error, Connection con){
 ResultSet rs = null;
 try{
 Statement stmt = con.createStatement();
 rs = stmt.executeQuery(command);
 catch(Exception E){
 E.printStackTrace(System.out);
 return rs;
the jsp page:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page isErrorPage="false" %>
<%@ page import="java.sql.*" %>
<%@page import="ot3.User"%>
<%@page import="ot3.SqlInjektor"%>
<%@page import="Javax.servlet.jsp.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>vastaanotto</title>
</head>
<body>
<%! String id;
 String password;
 String error = new String("Error!\n");
 User user;
%>
<% user = new User();
 session.putValue("currentUser",user);
 id = request.getParameter("authName");
password = request.getParameter("Password");
 Connection conn=null;
 ResultSet rs=null;
 conn = SqlInjektor.createConnection(error);
 if(conn!=null){
 out.println("conn ok!");
 rs = SqlInjektor.querySQL("SELECT * FROM user WHERE id='" + id +"' AND password='" + password+"' COLLATE latin1_bin;",error,conn);}
 try {
 if (rs!= null && rs.next()){
 user.setID(rs.getInt("id"));
 user.setName(rs.getString("name"));
 user.setPassword(rs.getString("password"));
 user.setClearance(rs.getInt("clearance"));
 if(rs.getString("addedby")!=null)
 user.setAdder(rs.getInt("addedby"));
 if(rs.getString("lastmodifier")!=null)
 user.setModifier(rs.getInt("lastmodifier"));
 rs.close();%>
 ONNISTU!
 <%}
 else {
 out.println(error);
 } catch (SQLException e) {
 out.println(e.getMessage());
 }%>
</body>
</html>

Problem with JDBC and Tomcat

I don't know where the problem originate, the only thing in my memory is that the program worked very well on my PC yesterday, but today, without even slightest change, it doesn't work anymore. As to debug it, I simplified the codes to the least, but it still refuse to work. I was beaten down by this problem totally, and cannot make out any solution for it, so, I come here, hoping to find a warrior to kill this damned bug for me.
My program is a Servlet, but for the purpose of debugging, I have recode it to an Application/Servlet. When run as a application, I can get the result expected, but as a Servlet, :-(, maybe you should see it by yourself. My server software is Tomcat 4.1.15, and the JDK version is 1.4.0. To excute this program, you should add Data Source "Test" to ODBC.
///////////////////////code begins/////////////////////////
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class Ex extends HttpServlet
 int ErrorType = 0;
 String err = new String("");
 public static void main(String args[]) throws Exception{
 Ex cEx = new Ex();
 cEx.init();
 System.out.println(cEx.ErrorType);
 public void init() {
 String url = "jdbc:odbc:Test";
 ErrorType = 3; //passed
 try{
 Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
 } catch (ClassNotFoundException e) {
 e.printStackTrace();
 ErrorType = 1; //trapped in Class.forName
 try{
 Connection c = DriverManager.getConnection(url);
 } catch (SQLException e) {
 e.printStackTrace();
 ErrorType = 2; //trapped in DriverManager.getConnection
 err = e.getMessage();
 public void service(HttpServletRequest req, HttpServletResponse res)
 throws IOException {
 res.setContentType("text/html; charset=GB2312");
 PrintWriter out = res.getWriter();
 out.println("Success " + "" + ErrorType + "" +err);
 out.close();
//////////////////////////code ends///////////////////////////////
The result from the Servlet tell me that the problem occurred within the connection process, I don't know who should be responsible to this - Tomcat or JDBC?

If you could print the exception that you got then that would help :) In the mean time, I could make a guess. It is unlikely that your application server (in this case, Tomcat) is blocking connections from your servlet. So the problem is either with JDBC directly or with the underlying datasource. It seems unlikely that it is JDBC given that you have stated that the code has not changed and it works in application form.
My guess would be that you are coming up against some sort of security constraint (eg: your DBMS is letting you log in from one IP but not another?, your Java plug-in security policy is disallowing the connection?). It's hard to say.
But if it works as an application but not via a servlet then you could try putting this in your java.policy file, which is located in the directory where your plug-ins are installed (eg: "C:\Program Files\Java\<version>\lib\security\") on Windows systems;
permission java.net.SocketPermission "bend xp:1099", "listen,connect,accept";
Try that, see if it works :)
Ben

Problems with jdbc and .jar files.

I am having a problem with connecting to my database when running my .jar file as an executable.
It connects correctly when I use the java command in command prompt and it also runs correctly when using my IDE.
Is there something that needs to be added to the manifest or in the code it self inorder for the program to find the JDBC driver correctly?

This is the error message that I get:
java.lang.ClassNotFoundException: net.sourceforge.jtds.jdbc.Driver
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at AboutFrame2$Connect.getConnection(AboutFrame2.java:109)
at AboutFrame2$Connect.displayDbProperties(AboutFrame2.java:127)
at AboutFrame2.<init>(AboutFrame2.java:72)
at MainStartFile2.main(MainStartFile2.java:7)
Error Trace in getConnection() : net.sourceforge.jtds.jdbc.Driver
Error: No active Connection
I think that it is because it cannot find the driver. I am going to add the path to the manifest and see if that works thank you for all the help.

Problems with PHP and MySQLi server behaviors

Hi,
I'm a graphic and Web-designer with some knowledge of PHP and MySQL and I've been using Dreaweaver since very early ages in creating dynamic web projects and use the Bindings and Server behaviors quite a lot. But recently PHP has deprecated MySQL_connect since 2012 and it seems Dreamweaver isnt suporting the alternative MYSQLi server behaviors which will be the future of accessing Databases in MySQL along side with other options. Without this feature Dreamweaver is not of any use to us web-designers, since there are many Free great Editing software out there... Is the Dreamweaver team solving this problem? Or are you really planning on dropping this software? I've been using CS5.5 for a while and was planning on updating but this is a key feature and without it its not worth the investment.
Kind regards.
Eddy

heduino wrote:
Hi,
I'm a graphic and Web-designer with some knowledge of PHP and MySQL and I've been using Dreaweaver since very early ages in creating dynamic web projects and use the Bindings and Server behaviors quite a lot. But recently PHP has deprecated MySQL_connect since 2012 and it seems Dreamweaver isnt suporting the alternative MYSQLi server behaviors which will be the future of accessing Databases in MySQL along side with other options. Without this feature Dreamweaver is not of any use to us web-designers, since there are many Free great Editing software out there... Is the Dreamweaver team solving this problem? Or are you really planning on dropping this software? I've been using CS5.5 for a while and was planning on updating but this is a key feature and without it its not worth the investment.
Kind regards.
Eddy
There are no plans that I know of to introduce a new set of mysqli server behaviours into DW from Adobe. They have left that to thrid party developers to bring out extensions which replace them.
What the server behaviours could do was very limiting anyway so I suspect any replacement mysqli behaviours would also be very limiting. I personally jumped into thre code and started to write my own mysqli connection files and query strings by watching a few simple tutorials on youtube - it isnt that difficult.
Look for 'php academy' on youtube - they have about 9 simple to follow tutorials on getting started with mysqli.

$200 reward to solve problem with JDBC and CLOB.getCharacterOutputStream

I'm trying to update CLOB with the getCharacterOutputStream as suggested in the example code. It works with US7ASCII DB instance but not instances in UTF8.
I've been browsing through all the Oracle doc's and found some rather confusing statements:
In the page at http://oradoc.photo.net/ora816/java.816/a81354/oralob2.htm#1043220
it says: [When writing to or reading from a CLOB, the JDBC drivers perform all character set conversions for you.]
also: [The oracle.sql.CLOB class supports all the character sets that the Oracle data server supports for CLOB types.]
So far so good.
In the page at http://oradoc.photo.net/ora816/java.816/a81354/oraint3.htm#1012518
it says [The oracle.sql package supports these datatypes in several ways: CLOBs point to large fixed-width character data items (that is, characters that require a fixed number of bytes per character) and are supported by the oracle.sql.CLOB class.]
Ooh no! Is this for real? UTF8 is variable width and does this mean it is not supported?
Any way to get around this?
In the page at http://oradoc.photo.net/ora816/java.816/a81358/03_pub2.htm#36009
says [6.The mappings to oracle.sql classes are optimal because they preserve data formats and require no character-set conversions (apart from the usual network conversions). Those classes are especially useful in applications that "shovel" data between SQL and Java.]
"No character set conversion"? Very confusing!
I've been hammering on this CLOB/JDBC/UTF8 problem for more than a week now and I really appreciate some solutions, workarounds, or whatever help I can get. I'm running java stored procedure in 8.1.6 on Linux RH6.2.
For your trouble, I'd pay $200 for the first guy who come up with a verifiable solution.

This is just findings based upon your comments:
Please refer to document Oracle8i National Language Support Guide
Release 2 (8.1.6) from Oracle Documentation Library, Release 8.1.7
Chapter 6 Java,
There its clearly mention that:
"Oracle JDBC drivers provide globalization support by allowing users to retrieve data from or insert data into a database in any character set that Oracle supports. Because Java strings are UCS2 encoded (16-bit Unicode) for JDBC programs, the target character set on the client is always UCS2. Character set conversion is required to convert data from the database character set (Db Charset) to UCS2. This applies to CHAR, LONG, CLOB, and VARCHAR2 data types; RAW data is not converted. "
Also..please refer this...
"oracle.sql.CLOB's method getCharacterStream() returns the contents of a CLOB as a Unicode stream."
"The techniques that Oracle's drivers use to perform character set conversion for Java applications depend on the character set the database uses. The simplest case is where the database uses a US7ASCII or WE8ISO8859P1 character set. In this case, the driver converts the data directly from the database character set to UCS2,which is used in Java applications. "
"If you are working with databases that employ a non-US7ASCII or non-WE8ISO8859P1 character set (for example, Japanese or Korean), then the driver converts the data, first to UTF8, then to UCS2. "
In my case the characte-set of the database is WE8ISO8859P1 and for security reason i can't change the character set but my feeling is that if you are updating the CLob from the java client you are forming a reference of a clob in the client which is UCS2 at the Java side. Now when you are populating the clob through java.io.Writer and call the procedure to pass the reference of the clob to the procedure then I believe the JDBC will convert the UCS2 datatype of Clob to UTF8 in the database.
You can try out the code snippet:
package ServletGDC;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import oracle.sql.*;
import java.sql.*;
import oracle.jdbc.driver.*;
import ClassesGDC.*;
public class testUpload extends HttpServlet {
private String m_strMessage="";//It stores the message to be uploaded along with the Document
Connection conn=null;
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
String strContent="";
//res.setContentType("application/msword");
res.setContentType("text/html");
PrintWriter out = res.getWriter();
try {
CallableStatement cmt=null;
OutputStream output=null;
ByteArrayOutputStream byteoutput=null;
String strDocString="";
oracle.sql.CLOB tempClob = null;
String strPassedFileName=""; // the file name passed in the request object
String strStdFilename="";//the file name to be given to the best practice
String strSaveDirectory=""; //the directory in which the bp is to be saved
String strParamName="";//name of parameters
String strParamValue="";//value of parameters
int intTempVariable=0; // temporaty variable
long lngSizeOfFileUploaded=0;//stores the size of the file which had been uploaded in the file system
File filePathOfFileUploaded=null;//stores the path of the file uploaded to the file system
String strQuery="";
//ST------------checks if the user has logged in or not-----------------------
HttpSession session=req.getSession(true);
if(req.getContentLength()>20*1024*1024)
throw new skip("The size of the posted content is more than 10 MB . If you have a best practice whose size is more than 1 MB please mail it to Us.");
byteoutput = new ByteArrayOutputStream();
MultipartParser mp = new MultipartParser(req, 20*1024*1024); // 10MB is the limit of the file to be uploaded
Part part;//Its an abstact part which helps in retrieving information about the file and the parameters
while ((part = mp.readNextPart()) != null) {//Reads the next part
strParamName = part.getName();
// the following if is executed if the part is for a parameter rather than a file
if (part.isParam()) {
}else if (part.isFile()) {
// it's a file part
m_strMessage="inside file part";
FilePart filePart = (FilePart) part;
strPassedFileName = filePart.getFileName();
strContent= filePart.getContentType();
out.println(" strPassedFileName is "+strPassedFileName+"");
if(strPassedFileName != null || !(strPassedFileName.trim().equals("")) ) {
// the part actually contained a file
out.println(" before forming long");
//lngSizeOfFileUploaded = filePart.writeTo(filePathOfFileUploaded); //the statement upload the bestpractice in the
lngSizeOfFileUploaded = filePart.writeTo(byteoutput); //specified file path filePathOfFileUploaded.
out.println(" after file is written into the outputstream");
else {
throw new skip("The file name is null or it is empty space. Files in such Format are not accepted");
}//end of else if
}//end of while loop
if( lngSizeOfFileUploaded==0) {// the size of the file uploaded is zero then the file supplied was not proper and hence exception is to be thrown
//if(filePathOfFileUploaded.exists())
// filePathOfFileUploaded.delete();
throw new skip("The File could not be uploaded,Possible reasons may be that the file is sent null or the file is corrupted");
//END---------------the file is uploaded in the proper directory--------------------
//res.setContentType(strContent);
out.println(" long value is : "+lngSizeOfFileUploaded+" and content is "+strContent+"");
String strbyte= byteoutput.toString();
byteoutput.flush();
Class.forName("oracle.jdbc.driver.OracleDriver");
// Establish network connection to database
conn = DriverManager.getConnection("jdbc:oracle:thin:@pc-p32670:1521:GDCDBI","gdc_user","myuser");
//if(conn!=null)
out.println(" Connection formed"+conn);
//els
//out.println(" long value is : "+strbyte+"");
try{
tempClob = oracle.sql.CLOB.createTemporary(conn,true, oracle.sql.CLOB.DURATION_SESSION);
out.println(" tempClob : "+tempClob);
tempClob.open( oracle.sql.CLOB.MODE_READWRITE);
java.io.Writer tempClobWriter = tempClob.getCharacterOutputStream();
// writing the string formed from the multipart file to the clob
tempClobWriter.write(strbyte);
if(tempClob!=null){}
out.println(" CLOB value is : "+tempClob+"");
strQuery="{call INSERT_CLOB(?,?)}";
cmt=conn.prepareCall(strQuery);
cmt.setString(1,strPassedFileName);
cmt.setClob(2,tempClob);
cmt.registerOutParameter(2,java.sql.Types.CLOB);
cmt.execute();
tempClobWriter.flush();
tempClobWriter.close();
tempClob.freeTemporary();
//res.setContentType(strContent);
//strDocString.toString();
out.println(" bob is "+strbyte+"");
tempClob.close();
}catch(Exception e){
tempClob.close();
out.println(" Error is :"+e.getMessage()+"");
//e.printStackTrace(out);
cmt.close();
//out.println(" <h2>SUCCESS</h2>");
//res.sendRedirect("../test/showfile.jsp?contentype="+strContent.trim()+"");
}catch(Exception e){
java.util.Date d = new java.util.Date();
String s =d.toString();
out.println(" Error is :"+e.getMessage()+"");
//e.printStackTrace(out);
}finally{
try{
if(conn!=null)
conn.close();
}catch(Exception e){
out.println(" Error is :"+e.getMessage()+"");
}// end of finally
} //end of doPost
} //end of class
in the Procedure you will be inserting/updating the clob in a table with the reference clob in the out parameter of the procedure
Thanks.

Problems with PreparedStatement and MySQL selecting bytes

Hi,
i have a problem trying to select information when the "select" has a byte restrict.
The table in database is:
CREATE TABLE `positions` (
`PKID` int(10) unsigned NOT NULL auto_increment,
`POSCODE` varbinary(30) NOT NULL,
`ISWTURN` binary(1) NOT NULL,
`QTT_GAMES` int(10) unsigned NOT NULL default '1',
PRIMARY KEY (`PKID`),
UNIQUE KEY `UNIQ_POS` (`POSCODE`,`ISWTURN`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
And the test code to get the qtt_games is :
conn = DriverManager.getConnection (url,user,pwd);
byte bcode[] = poscode.getByteArrayCode();
// bcode is inserted ok in another preparedstatement...
String query = "SELECT qtt_games FROM positions "+
"WHERE poscode=? and iswturn=?";
PreparedStatement pstmt = conn.prepareStatement(query);
pstmt.setBytes (1,bcode);
pstmt.setByte (2,poscode.getIsWhiteTurn()); //it returns a byte
ResultSet rs = pstmt.executeQuery (query);
When pstmt.executeQuery is reached, it's thrown the exception:
com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '=? and iswturn=?' at line 1
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:936)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2870)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1573)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3170)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3099)
at com.mysql.jdbc.Statement.execute(Statement.java:695)
at app.server.bbdd.MYSQLBDManager.getGamesBasicInfo(MYSQLBDManager.java:942)
at app.server.bbdd.MYSQLBDManager.main(MYSQLBDManager.java:1068)
Can anybody tell me what's wrong?? I think the query is ok, but don't know what's happening with this...
Lots of thanks.

Don't cross-post, it's considered rude:
http://forum.java.sun.com/thread.jspa?threadID=5122604&messageID=9430056#9430056
http://forum.java.sun.com/thread.jspa?threadID=5122603&messageID=9430050#9430050
One to a customer, please.
%

[JAVA] problems with java and mysql

Hi, i have already installed php + mysql and work's them fine, but i want to install java + mysql. I have downloaded eclipse and installed its, that's ok. I have download tomcat and, that's ok. I have download module jconnector and have copied the file .jar in the java home and set classpath. Run and compiled this source that's ok. At runtime the program ask: Impossible connection at the database, why ? It's the source of program:
[JAVA]
import java.sql.*;
public class connessione {
private String nomeDB; // Nome del Database a cui connettersi
private String nomeUtente; // Nome utente utilizzato per la connessione al Database
private String pwdUtente; // Password usata per la connessione al Database
private String errore; // Raccoglie informazioni riguardo l'ultima eccezione sollevata
private Connection db; // La connessione col Database
private boolean connesso; // Flag che indica se la connessione � attiva o meno
public connessione(String nomeDB) { this(nomeDB, "", ""); }
public connessione(String nomeDB, String nomeUtente, String pwdUtente) {
this.nomeDB = nomeDB;
this.nomeUtente = nomeUtente;
this.pwdUtente = pwdUtente;
connesso = false;
errore = "";
// Apre la connessione con il Database
public boolean connetti() {
connesso = false;
try {
// Carico il driver JDBC per la connessione con il database MySQL
Class.forName("com.mysql.jdbc.Driver");
// Controllo che il nome del Database non sia nulla
if (!nomeDB.equals("")) {
// Controllo se il nome utente va usato o meno per la connessione
if (nomeUtente.equals("")) {
// La connessione non richiede nome utente e password
db = DriverManager.getConnection("jdbc:mysql://localhost/" + nomeDB);
} else {
// La connessione richiede nome utente, controllo se necessita anche della password
if (pwdUtente.equals("")) {
// La connessione non necessita di password
db = DriverManager.getConnection("jdbc:mysql://localhost/" + nomeDB + "?user=" + nomeUtente);
} else {
// La connessione necessita della password
db = DriverManager.getConnection("jdbc:mysql://localhost/" + nomeDB + "?user=" + nomeUtente + "&password=" + pwdUtente);
// La connessione � avvenuta con successo
connesso = true;
} else {
System.out.println("Manca il nome del database!!");
System.out.println("Scrivere il nome del database da utilizzare all'interno del file \"config.xml\"");
System.exit(0);
} catch (Exception e) { errore = e.getMessage(); }
return connesso;
public static void main(String [] args) {
connessione a=new connessione("asta","root","");
if(a.connetti())
System.out.println("Connessione al database riuscita");
else
System.out.println("Connessione al database non riuscita");
[JAVA]

With this line I always pass the username and password also:
db = DriverManager.getConnection("jdbc:mysql://localhost/" + nomeDB);
db = DriverManager.getConnection("jdbc:mysql://localhost/" + nomeDB, useName, Password);
Make sure you create your users in MySQL with the correct permissions

Problems with java and mysql error: 1064

Hello,
I have been struggling with the following java code for a day. I ALWAYS get the following error code : 1064 and I just can't figure out why. I am trying to insert data into a mysql table.
Can anyone please help?
Thanks in advance,
Julien.
package com.newedgegroup.pnr.misc;
import java.sql.BatchUpdateException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.text.ParseException;
import java.text.SimpleDateFormat;
* @author Julien Martin
public class RunDataCopy {
    public static void main(String[] args) throws ClassNotFoundException, Exception , ParseException {
        Class.forName("com.ibm.as400.access.AS400JDBCDriver");
        String url_source = "jdbc:as400://as400a.calyonfinancial.com";
        Connection con_source = DriverManager.getConnection(url_source, "upload", "upload");
        Class.forName("com.mysql.jdbc.Driver");
        String url_target = "jdbc:mysql://localhost:3306/pnr";
        Connection con_target = DriverManager.getConnection(url_target, "root", "");
        Statement stat_source = con_source.createStatement();
//        ResultSet rs_source = stat_source.executeQuery("select * from QS36F.GMIST4F1 po");
        String query = "SELECT " +
                " sum (po.PGROSS) AS OPTION_PREMIUM, " +
                "po.PFIRM, " +
                "po.POFFIC, " +
                "po.PACCT, " +
                "po.PTDATE, " +
                "po.PRR, " +
                "po.PEXCH, " +
                "po.PSUBEX, " +
                "po.PFC, " +
                "po.PSYMBL, " +
                "po.PCLASS, " +
                "po.PSUBCL, " +
                "po.PSUBTY, " +
                "po.PSDSC1, " +
                "po.PCTYM, " +
                "po.PSTRIK, " +
                "po.PCLOSE, " +
                "po.PUNDCP, " +
                "po.PCURSY, " +
                "po.PEXPDT, " +
                "po.PLTDAT, " +
                "po.PMULTF, " +
                "po.PPTYPE, " +
                "po.PBS " +
                "FROM QS36F.GMIST4F1 as po " +
                "WHERE " +
                "0              = 0 " +
                "AND po.PFIRM   = 'I' " +
                "AND po.POFFIC = '349' " +
                "AND po.PRECID in ('T','B','Q') " +
                "AND po.PSUBTY != ' ' " +
                "AND po.PCMNT1 != ' E' " +
                "AND po.PCMNT1 != ' A' " +
                "GROUP BY " +
                "po.PFIRM, " +
                "po.POFFIC, " +
                "po.PACCT, " +
                "po.PTDATE," +
                "po.PRR, " +
                "po.PEXCH, " +
                "po.PSUBEX," +
                "po.PFC, " +
                "po.PSYMBL, " +
                "po.PCLASS, " +
                "po.PSUBCL, " +
                "po.PSUBTY, " +
                "po.PSDSC1, " +
                "po.PCTYM, " +
                "po.PSTRIK, " +
                "po.PCLOSE, " +
                "po.PUNDCP, " +
                "po.PCURSY, " +
                "po.PEXPDT, " +
                "po.PLTDAT, " +
                "po.PMULTF, " +
                "po.PPTYPE, " +
                "po.PBS ";
        // System.out.println(query);
        ResultSet rss = stat_source.executeQuery(query);
        StringBuffer sb = new StringBuffer("");
        SimpleDateFormat df_s = new SimpleDateFormat("yyyyMMdd");
        SimpleDateFormat df_t = new SimpleDateFormat("yyyy-MM-dd");
        con_target.setAutoCommit(false);
        Statement stat_target = con_target.createStatement();
        int i = 0;
        try {
            while (rss.next()) {
                i++;
                sb.append("INSERT INTO `pnr`.`pnr_transaction` (").append("\n");
                sb.append("`FIRM_ID`,").append("\n");
                sb.append("`OFFICE_NUMBER`,").append("\n");
                sb.append("`ACCOUNT_NUMBER`,").append("\n");
                sb.append("`SALESMAN`,").append("\n");
                sb.append("`EXCHANGE_CODE`,").append("\n");
                sb.append("`SUBEXCHANGE`,").append("\n");
                sb.append("`FUTURES_CODE`,").append("\n");
                sb.append("`SYMBOL`,").append("\n");
                sb.append("`ACCOUNT_CLASS_CODE`,").append("\n");
                sb.append("`SUB_CLASS_CODE`,").append("\n");
                sb.append("`SECURITY_SUB_TYPE`,").append("\n");
                sb.append("`SECURITY_DESCRIPTION_LINE`,").append("\n");
                sb.append("`CONTRACT_YR_MON`,").append("\n");
                sb.append("`STRIKE_PRICE`,").append("\n");
                sb.append("`CLOSING_MARKET_SETTLEMENT_PRICE`,").append("\n");
                sb.append("`UNDERLYING_CLOSE_PRICE`,").append("\n");
                sb.append("`PRODUCT_CURRENCY_SYMBOL`,").append("\n");
                sb.append("`EXPIRATION_DATE`,").append("\n");
                sb.append("`LAST_TRADING_DATE`,").append("\n");
                sb.append("`MULTIPLICATION_FACTOR`,").append("\n");
                sb.append("`PRODUCT_TYPE_CODE`,").append("\n");
                sb.append("`CATEGORY_ID`,").append("\n");
                sb.append("`MARKET_TYPE_ID`,").append("\n");
                sb.append("`TAX_STATUS_ID`,").append("\n");
                sb.append("`AMOUNT`").append("\n");
                sb.append(") VALUES (").append("\n");
                sb.append("'").append(rss.getString("PFIRM")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("POFFIC")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PACCT")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PRR")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PEXCH")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSUBEX")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PFC")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSYMBL")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PCLASS")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSUBCL")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSUBTY")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PSDSC1")).append("'").append(",").append("\n");
                sb.append("'").append(rss.getString("PCTYM")).append("'").append(",").append("\n");
                sb.append(rss.getString("PSTRIK")).append(",").append("\n");
                sb.append(rss.getString("PCLOSE")).append(",").append("\n");
                sb.append(rss.getString("PUNDCP")).append(",").append("\n");
                sb.append("'").append(rss.getString("PCURSY")).append("'").append(",").append("\n");
                sb.append("'").append(df_t.format(df_s.parse(rss.getString("PEXPDT")))).append("'").append(",").append("\n");
                sb.append("'").append(df_t.format(df_s.parse(rss.getString("PLTDAT")))).append("'").append(",").append("\n");
                sb.append(rss.getString("PMULTF")).append(",").append("\n");
                sb.append("'").append(rss.getString("PPTYPE")).append("'").append(",").append("\n");
                //sb.append(rss.getString("PBS")).append(",");
                sb.append("1").append(",").append("\n");
                sb.append("1").append(",").append("\n");
                sb.append("1").append(",").append("\n");
                sb.append(rss.getString("OPTION_PREMIUM")).append("").append("\n");
                // sb.append(df_t.format(df_s.parse(rss.getString("PTDATE")))).append(",");
                sb.append(") ").append("\n");
                System.out.println(sb.toString());
                //     stat_target.executeUpdate(sb.toString());
                stat_target.addBatch(sb.toString());
//        stat_target.executeUpdate(sb.toString());
                if (i == 2) {
                    break;
            stat_target.executeBatch();
            con_target.commit();
        } catch (BatchUpdateException be) {
            System.out.println("be: "+be.getErrorCode());
            System.out.println("be: "+be.getMessage());
            be.printStackTrace();
            System.out.println("be: "+i);
        } catch (SQLException se) {
            System.out.println("se: "+se.getErrorCode());
            System.out.println("se: "+i);
}

What is the error message?
I advice you to use prepared statement for batch inserting.

Performance problem with sproc and out parameter ref cursor

Hi
I have sproc with Ref Cursor as an OUT parameter.
It is extremely slow looping over the ResultSet (does it record by record in the fetch).
so I have added setPrefetchRowCount(100) and setPrefetchMemorySize(6000)
pseudo code below:
string sqlSmt = "BEGIN get_tick_data( :v1 , :v2); END;";
Statement* s = connection->createStatement(sqlStmt);
s->setString(1, i1);
// cursor ( f1 , f2, f3 , f4 , i1 ) f for float type and i for interger value.
// 5 columns as part of cursor with 4 columns are having float value and
// 1 column is having int value assuming 40 bytes for one rec.
s->setPrefetchRowCount (100);
s->PrefetchMemorySize(6000);
s->registerOutParam(2,OCCICURSOR);
s->execute();
ResultSet* rs = s->getCursor(2);
while (rs->next()) {
// do, and do v slowly!
}

Hi,
I have the same problem. It seems, when retrieving cursor, that "setPrefetchRowCount" is not taking into account by OCCI. If you have a SQL statement like "SELECT STR1, STR2, STR3 FROM TABLE1" that works fine but if your SQL statement is a call to a stored procedure returning a cursor each row fetching need a roudtrip.
To avoid this problem you need to use the method "setDataBuffer" from the object "ResultSet" for each column of your cursor. It's easy to use with INT type and STRING type, a lit bit more complex with DATE type. But until now, I'm not able to do the same thing with REF type.
Below a sample with STRING TYPE (It's assuming that the cursor return only one column of STRING type):
try
l_Statement = m_Connection->createStatement("BEGIN :1 := PACKAGE1.GetCursor1(:2); END;");
l_Statement->registerOutParam(1, oracle::occi::OCCINUMBER, sizeof(l_CodeErreur));
l_Statement->registerOutParam(2, oracle::occi::OCCICURSOR);
l_Statement->executeQuery();
l_CodeErreur = l_Statement->getNumber(1);
if ((int) l_CodeErreur == 0)
 char l_ArrayName[5][256];
 ub2 l_ArrayNameSize[5];
 l_ResultSet = l_Statement->getCursor(2);
 l_ResultSet->setDataBuffer(1, l_ArrayName, OCCI_SQLT_STR, sizeof(l_ArrayName[0]), l_ArrayNameSize, NULL, NULL);
 while (l_ResultSet->next(5))
 for (int i = 0; i < l_ResultSet->getNumArrayRows(); i++)
 l_Name = CString(l_ArrayName);
l_Statement->closeResultSet(l_ResultSet);
m_Connection->terminateStatement(l_Statement);
catch (SQLException &p_SQLException)
I hope that sample help you.
Regards

Problems with ACS4 and MySQL Server

Hi,
I am using acs4 with MySQL Server 5.0.67 as database under Windows. It all works fine except that very often I get a deadlock exception using the admin console.
Here is what is logged in the admin.log:
23 Apr 2009 12:20:15,231 TRACE DefaultSQLDatabaseRecordEnumerator: SELECT resourceid, voucherid, encryptionkey, permissions, defaultitem FROM resourcekey WHERE resourceid = ?
23 Apr 2009 12:20:15,231 TRACE DefaultSQLDatabaseRecordEnumerator:   obj 1 = acc14cde-ea85-4f29-82ef-a771438bbcfc
23 Apr 2009 12:20:15,262 ERROR DefaultSQLDatabaseConnection: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
23 Apr 2009 12:20:15,262 TRACE DefaultSQLDatabaseConnection: rollback
23 Apr 2009 12:20:15,262 ERROR AdeptServlet: database error [192.168.2.101]
com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
    at com.mysql.jdbc.Util.getInstance(Util.java:381)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1045)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3515)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3447)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2554)
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1761)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2046)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1964)
    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1949)
    at com.adobe.adept.persist.DefaultSQLDatabaseConnection.deleteExpired(DefaultSQLDatabaseConn ection.java:479)
    at com.adobe.adept.shared.security.DistributorNonceUtil.checkNonce(DistributorNonceUtil.java :56)
    at com.adobe.adept.admin.servlet.ManagePersistent.doPost(ManagePersistent.java:291)
    at com.adobe.adept.admin.servlet.ManagePersistent.doPost(ManagePersistent.java:40)
    at com.adobe.adept.servlet.AdeptServlet.doPost(AdeptServlet.java:184)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j ava:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.ja va:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Unknown Source)
23 Apr 2009 12:20:15,278 TRACE AdeptServlet: request end http://...
MySql is using InnoDB as storage engine.

yes, you can do this via the admin gui by modifying the http listener port.
You can also do this via the cli commandline as well http-listener-1 is the one you want to change the port for.
http://docs.sun.com/source/817-6088/httpservice.html has details

Performance problems with JDBC and mysql

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