prepared-statement

I am trying to understanding if Statement caching is useful in case of parametrized prepared statements. As per my understanding If I use caching, then query will cached based on its 'String'. In this case, if a query has different values of parameter then it is a different / new statement/string w.r.t. caching. Also, when parameters change, the results also change. Since prepared statements are parameterized, is it really useful to use caching in this case. I am using JDBC/Snaq DB Pool/ MySQL database. Statement Caching here is referred to two different cases: JAVA: Snaq DB pool provided

I recently have began using prepared statements again in a web application, and I know that it is discouraged to use prepared statements for all the transactions. What I do not know is when it is best to use prepared statements or not. I have read of when to use and not use them, but none of the examples really tell best practice of using them. I am trying to figure out which database calls I should be using them for and which ones I should not. For Example the MySQL website mentions it in "When to use prepared statements" on the following page Prepared Statements-MySQL The general thumb rule

I started getting the below SQL exception and I don't know what's the root cause for this exception? I am also closing dbconnection and prepared statement too. Then what's the problem? java.sql.SQLException: ORA-00604: error occurred at recursive SQL level 1 ORA-01000: maximum open cursors exceeded ORA-00604: error occurred at recursive SQL level 1 ORA-01000: maximum open cursors exceeded ORA-01000: maximum open cursors exceeded Below is my code which I am using. Anything wrong in my code? for (Entry<Integer, LinkedHashMap<Integer, String>> entry : GUID_ID_MAPPING.entrySet()) { pstatement = db

I have a query that will need to run 28 000 times in a row, so I thought using a preparedStatement probably is a clever idea. Here is my query : String requestWithFirstName = "SELECT SE.ELEMENT_ID, SE.LASTNAME||' '||SE.FIRSTNAME AS ELEMENT, (SCORE(1)+SCORE(2))/2 AS SCORE " + "FROM BL_SUSPICIOUS_ELEMENT SE " + "WHERE CONTAINS(SE.LASTNAME, 'fuzzy({' || ? || '},' || ? || ',' || ? || ', weight)' , 1)>0 " + "AND CONTAINS(SE.FIRSTNAME, 'fuzzy({' || ? || '},' || ? || ',' || ? || ', weight)' , 2)>0 " + (type > 0 ? "AND SE.ELEMENT_TYPE_ID = ?" : "") + " ORDER BY SCORE DESC"; Everthings worked fine

I tried to uplad a pdf file using java.sql.PreparedStatement to mysql Blob field using the following code. File inFile = new File("Path+BLOCK.pdf"); byte[] b = new byte[(int)inFile.length()]; PreparedStatement psmnt = (PreparedStatement) con.prepareStatement("INSERT INTO 2012DOC (SRNO,DOCUMENT) VALUES (?,?)" ); //con is java.sql.Connection object psmnt.setString(1, "1200021"); psmnt.setBytes(2, b); psmnt.executeUpdate(); This code executes without error and database shows blob content, but when I try to retrieve the file using the below code it gives a corrupt file which doesn't open.

I'm going to be switching my database class that I use in several sites/projects, from using a custom mysql_query method*, to using PDO and prepared statements. However I have a question first - do I want to use prepared statements everywhere ? Even in places where the query will only be ran once? What about situations where I need to do something like: INSERT INTO `table` (`column`, `column`) VALUES ('value','value'), ('value','value'),('value','value'), etc. Should I use a single prepared statement (And a single VALUE), but execute it with different variables each time, or should I use the