Prepared statements or hibernation

I wonder a column in a Table.

Is there a difference between the statements prepared and Hibernate when it comes to performance?

923269 wrote:
Can I use H - SQL of Hibernate?

HSQL is the query language Hibernate defines to allow you to ask questions about your model (entity classes) instead of having to write the SQL that is geared to the databases. Hibernate is responsible for translating the HSQL query for a real SQL and translate the results into a structure of object model.

So yes, you can use HSQL, IF you use the Hibernate.

Tags: Java

Similar Questions

  • Error no prepared statement

    OS 7.1

    SQLite DB

    I create a screen with 3 buttons of pill.  The first pill button displays a detail screen of the item selected from a previous screen.  Second and third pills show lists of items associated with the selected point hand.  I use a cursor from the main screen to keep the information of the details screen.  When I got to the second pill and try to get the list of questions, I get an error of database on the slider "statements not prepared."

    Cursor tagsCursor = null;
            try
            {
                Statement statement;
                // Get Single Site
                statement = SQLManager.appDB.createStatement("SELECT Key, iBase, SiteBPNumber, "
                        + "CurrentMeterCount, LaborWarrantyFlag FROM "
                        + tableName
                        + " WHERE SiteBPNumber = ? ");
                statement.bind(1, siteBPNumber);
                statement.prepare();
                tagsCursor = statement.getCursor();
            } catch (DatabaseException de) {
                SDApp.handleException(de, "Get Tag Query");
            }
    
            return tagsCursor;
    

    It is an application similar to the one who gets the first list of the screen cursor and retail.

    I have not found a solution to this error.  I think it might have to do with the database connection is already opened with the previous cursor.  But if I close the cursor to the first list of the screen and the detail, I get an error on this cursor.

    I don't know what I should do about it.

    Too bad.  I think I need a vacation.

    You must prepare before linking.

    So, this

    statement.bind(1, siteBPNumber);
    statement.prepare();
    

    Should be present

    statement.prepare();
    statement.bind(1, siteBPNumber);
    

    Well.  Who lost a lot of my time.

    Also.  I use a function that brings back a cursor.  After I completed the list by the cursor, I closed this slider and it seems to have worked very well.

  • Table query result using prepared as a parameter in the prepared statement later

    Hi all

    Very new to PHP. A series of 3 prepared statements (see code below), I'm trying to sink.  This page is triggered from a link on a page that lists the individual and all candidates which works well.  Prepared statement 1 works and displays the data in the columns line wanted specific, bottom access so I would call it record and areas, but I think it is called line and columns here.  Prepared Statement 2 which hands on a table of cross references (we have a many-to-many relationship between candidates and positions, therefore for the table of cross references) works and I can say the $selected_positions charges table, because I can see position_id data in the < body > of the file using this:

    <? PHP

    foreach ($selected_positions as $item) {}

    echo $item. "< br / > ';

    }

    ? >

    Can't take this $selected_positions table and use it as parameter in the prepared statement 3, at least not how I try to do.  So obviously he manages not prepared statement 3 no way is a table that I called $the_positions which is supposed to contain the ID of the post, position of securities and to position the position_id numbers that are in the array $selected_positions.  I can say that 3 of prepared statement is a failure because there is no indication in this table that is in the < body > of the file:

    < table class = "stripes table" >

    < b >

    Identification of the Position < /th > < th >

    < /Th > < th > post number

    Title < th > < /th >

    < /tr >

    <? PHP while ($stmt-> fetch()) {? >}

    < b >

    < td > <? = $position_id;? > < table >

    < td > <? = $position_number;? > < table >

    < td > <? = $title;? > < table >

    < /tr >

    <? PHP}? >

    < /table >

    Here is the PHP script:

    <? PHP

    require_once '... /includes/session_timeout_db.php';

    ? >

    <? PHP

    require_once '... /includes/Connection.php';

    initialize the flag

    $OK = false;

    $conn = dbConnect ('read');

    initialize statement

    $stmt = $conn-> stmt_init();

    If (isset($_GET['candidate_id'])) {}

    $sql = ' SELECT candidate_id, last_name, first_name, society, mas_number, last_modified, notes

    CANDIDATES WHERE candidate_id =?'; }

    If ($stmt-> {prepared ($sql))}

    bind the query parameter

    $stmt-> bind_param ('i', $_GET ['candidate_id']);

    run the query and fetch the result

    $OK = $stmt-> execute();

    bind the results to variables

    $stmt-> bind_result ($candidate_id, $last_name, $first_name, $company, $mas_number, $last_modified, $notes);

    $stmt-> fetch();

    free resources for the second query database

    $stmt-> free_result();

    }

    get the associated positions candidate

    $sql = 'SELECT position_id FROM pos2cands WHERE candidate_id =?';

    If ($stmt-> {prepared ($sql))}

    bind the query parameter

    $stmt-> bind_param ('i', $_GET ['candidate_id']);

    run the query and fetch the result

    $OK = $stmt-> execute();

    $stmt-> bind_result ($position_id);

    Browse the results to store in a table

    $selected_positions = [];

    While ($stmt-> fetch() {)}

    [] $selected_positions = $position_id;

    }

    }

    find data on the position of the table

    $sql = ' SELECT position_id, position_number, title

    FROM place WHERE position_id =?';

    If ($stmt-> {prepared ($sql))}

    bind the query parameter

    $stmt-> bind_param ('i', $_GET [$position_id]);

    run the query and fetch the result

    $OK = $stmt-> execute();

    bind the results to variables

    $stmt-> bind_result ($position_id, $position_number, $title);

    Browse the results to store in a table

    $the_positions = [];

    While ($stmt-> fetch() {)}

    [] $the_positions = $position_id;

    }

    }

    Get the error message if the request fails

    If (isset ($stmt) & &! $OK) {}

    $error = $stmt-> error;

    }

    If (! $stmt) {}

    $error = $conn-> error;

    } else {}

    $numRows = $stmt-> num_rows;

    }

    ? >

    Thank you in advancel

    You want to use the value of request 1 or query2 as a parameter in the query 3, right? Rather than build a table, you can simply use the value returned by each line that the query returns. I use PDO, no MySQLi, so I can't knock out quickly the MySQLi example for you.

    While ($result = $sql-> fetch (PDP::FETCH_ASSOC)) {}
    $field = $result ['domain'];

    Now we can use the value of $field as parameter for the next query.

    The brace that closes the while loop is placed after the last query

    so no need to fill an array with values

    }

    Your approach is doable with a few changes to the way in which you go through the table, but it is unnecessarily complicated.

    You might be able to use a single query to get all the data if you use left joins. With this approach, you start with the table that SHOULD return a result or which requires no dependencies to other tables. The structure is like this:

    SELECT field1, Field2, field3 FROM (SELECT * FROM table1 WHERE field3 = param1) has

    LEFT JOIN (SELECT * FROM table2 WHERE A.field4 = table2.field4) B

    LEFT JOIN table3 ON table3.field5 = B.field5 ORDER BY Field1

    A and B above are aliases for subsets of the table. You can image a (tacit) sign = equal A

  • Need help: not prepared statement to return the value:

    Hi refugees,

    In LICS, prepared statement does not return any value...

    This is the code...

    String p_person_id = pageContext.getParameter ("person_id");

    Connection Conn = pageContext.getApplicationModule (webBean) .getOADBTransaction () .getJdbcConnection ();

    String payment_query = "select max (payment_date) in the xxbdf_payslip_detail_mv where assingment_id = (select assignment_id from the people_reporting_info where person_id ' + p_person_id + ') ';

    PreparedStaement stmt = stmt.executeQuery ();

    ResultSet rs = stmt.executeQuery ();

    While ((rs! = null) & & RS.) Next

    {

    java.sql.Date sql_date = rs.getDate (1);

    SOP (SQL_DATE)

    / * I tried this also * /.

    java.util.Date util_date = rs.getDate (1);

    SOP();

    String string_date = rs.getString (1);

    SOP();

    }

    and I have to format the date as "DD-MM-RRRR.

    Please give your valuable suggestions refugees...

    Thank you

    Jaya

    Jaya Hey,

    Write the code below in the PR

    Code for the prepared statement


    String PaymentData;

    String p_person_id = pageContext.getParameter ("person_id");

    System.out.println ("The person Id is" + p_person_id); check the id of the person should not be null.

    try {}

    Connection Conn = pageContext.getApplicationModule (webBean) .getOADBTransaction () .getJdbcConnection ();

    String query = "select max (payment_date) in the xxbdf_payslip_detail_mv where assingment_id = (select assignment_id from the people_reporting_info where person_id ' + p_person_id + '); '

    PreparedStatement stmt = conn.prepareStatement (Query);

    ResultSet = stmt. ExecuteQuery();

    While (resultset.next ())

    {

    PaymentData = (String) resultset.getString("payment_date").toString ();

    }

    Conn.Commit ();

    }

    catch (System.Exception e)

    {

    e.printStackTrace ();

    }

    See below the Code for the Date Format Conversion


    cabu.ui.validate.Formatter formatter = new OADateValidater (PaymentData, "dd-MMM-YY" "");

    Thank you

    Dilip

  • Time of the value of a prepared statement and the differences in execution plan

    Hi guys... I have a doubt here that I was not able to specify the search on the internet.

    Is on prepared statements...

    When I do: con.prepareStatement (query);

    then the query is compiled and an execution plan is for this query on the database, I know. But what happens when I do con.close. Is the accessible yet statement caching other executions? to make this example:

    Suppose we are joining 20 tables and we have about 10 parameters for this query

    public ArrayList getData(String id1, String id2, String id 10) {       ArrayList response=new ArrayList();       Connection con=manager.getConnection();       String query="select name, phone, debtvalue, currency, etc from table1, table2, table3, table4, table20 where                           table1.id=table2.t1id and table2.id=table3.id and table2.fid=? and table1.fid=? and etc etc";//a big query       PreparedStatement pst=con.prepareStatement("select");       pst.setString (1, id1);       pst.setString (2, id2);       pst.setString (3, id3);       .       .       pst.setString (10, id10);       ResultSet rs=pst.executeQuery();       while (rs.next()) {               //do whatever and build the response ArrayList       }       rs.close();       pst.close();       return response; }

    Will be the compilation of the prepared statement and this execution plan is available for every performance of the getData method. Or a new plan of compilation and execution is calculated whenever I execute the method? Assuming that the running query takes a long time to maturity it its complexity and runs about 100 times a day in a production environment. It is advisable to use the prepared statement?

    Is the precompiled stuff avaible if I use a "" "NEW" "" said PreparedStatement with the same query?

    Thank you very much in advance for your answers...

    Published by: user4789473 on 25-mar-2013 17:14

    If you lose / close the statement prepared, Yes, you lose the ID. If you prepare again the same
    SQL, the DBMS must analyze the SQL code again, if to see if there is a query plan
    still/already existing for the DBMS session. According to the DBMS, it may or may not
    find/have/use plan, he created for the previous statement.

  • Problem using sequence.nextval in java prepared statement

    Hi guy,

    Has anyone tried to put sequence.next in the prepared statement in java? I have a few questions to use.


    example below


    private static final String SQL_insertEQFCYPRICE = "INSERT INTO TABLE ()"
    + "col1, col2, col3.
    + "VALUES (seq1.nextval,?,?,?)"; "


    Kind regards
    John

    'keycol' was something I composed for an example, because youre statement tried to insert 4 values but had only specified 3 columns...

    If you have a table, and the sequence as follows:

    Command > create table t1 (pk1 number, c2 char (10));
    Command > create sequence s1;

    and you run this statement:

    Command > insert into t1 values (s1.nextval, 'abc');
    1 row inserted.

    You get the correct result:

    Command > select * from t1;
    < 1,="" abc="">
    1 row found.

    To do this in Java you would prepare the following statement:

    insert into t1 values (s1.nextval?),

    then, before each execution of the prepared statement you would use the 'set' method to set the desired parameter 2 input value. Works very well.

    Chris

  • The prepared statement caching

    I am using Oracle 10 g on WIndows

    How can I manage the caching for prepared statements?

    This is done at the level of the Oracle. These are configurable within the Oracle

    Or do I have to use an external tool?

    Thank you

    Oracle will save the statement analyzed in shared pool and reuse for future calls. check the Oracle here concept

    Step 2: Analyze the statement

    http://download.Oracle.com/docs/CD/B19306_01/server.102/b14220/sqlplsql.htm#sthref3478

  • Entering data through prepared statement

    Hello everyone,

    I have a region, it contains some elements. These items are associated with their point of view the attributes of a basic VO EO

    I have a button to validate the insert transaction

    My requirement is:

    At the same time of the insertion (at the click event):

    1. I need to insert the values of these attributes in table1,
    2. I need to use among these 2 elements to do a different insertion into another table.

    For the first insertion, it works by combining these elements with attributes of an EO according to VO

    For the second insertion, I can't associate these two points with an another VO. If I create a method that contains a statement prepared with a request for insertion?

    This is the method that I created to be invoked to the click event: (he did not)

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            OracleResultSet oracleResultSet = null;
            StringBuffer stringBuffer = new StringBuffer();
            
            
            
            stringBuffer.append("insert into xx_onda_afaf_trace ");
            stringBuffer.append("(ID_ACTION,ID_FACTURE,DATE_RELLE,DATE_SYSTEME,LAST_UPDATE_DATE,LAST_UPDATED_BY,Creation_date,created_by) ");
            stringBuffer.append("VALUES (20,'1E',SYSDATE,SYSDATE,SYSDATE,0,SYSDATE,0)");
            OADBTransaction oadbTransaction = this.getOADBTransaction();
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                oracleResultSet = (OracleResultSet)oraclePreparedStatement.executeQuery();
                oadbTransaction.commit();
                
            }
            catch(Exception sqlException)
            {
                sqlException.printStackTrace();
            }
    

    Is could someone please tell me what is the right thing to do in this case?

    Thank you

    Kind regards

    Afaf

    You can create of VO based on multiple EO also. Not sure if this is possible in your use case.

    See you soon

    AJ

  • Problem with a prepared statement

    Hi all

    I'm trying to insert a row in a database using a statement prepared as follows

                    String [] test = tester; for(int i = 0; i < employ.length; i++){ System.out.println(test);
    }
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    try{
    ps = con.prepareStatement(query);
    if(connected){
    for(int i = 0; i < test.length; i++){
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    ps.setString(1, val);
    ps.executeUpdate();
    }
    }
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    displayErrors(se);
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    801330 wrote:

    ps.setString(1, val);
    ps.executeUpdate();
    

    Yet, when I try to insert using this code, I get an SQL exception

    The SQL Exception: No value specified for parameter 2

    I am not entered null value because this first loop must check and print the content of the table on the console to verify that. All the information is in the table, so I guess my question is how is there no value for parameter 2 when the table is full?

    Because (1) you never set just the first parameter (2) don't you really want to run the PS each time through the loop? Isn't it? I have not guessed not.

    DB

  • Prepared statement with placeholders - order or names are important

    Hello

    I'll explain my question, using the example of WESTERN literature.

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    -----

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    Best regards
    Kiril Kirov

    Your interpretation is correct in the first, second and third cases.
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  • Using the statement prepared in adf

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    Studio Edition Version 11.1.1.2.0

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    Create a method of AM service, as you did, but instead of writing your own prepared statement, just manipulate the VO in the method: create a line, set attributes, insert the line.

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