jdbc

问题 My jdbc is connected to oracle database using krb5loginmodule without any issue, by giving keytab file or ticket cache.But, due to performance, I want to connect my oracle database using Spark. If I use simple username and password, I am able to connect my spark application to Oracle database using below snippet: Dataset<Row> empDF = sparkSession.read().format("jdbc") .option("url", "jdbc:oracle:thin:hr/1234@//127.0.0.1:1522/orcl") .option("dbtable", "hr.employees") //.option("user", "hr") //

问题 My jdbc is connected to oracle database using krb5loginmodule without any issue, by giving keytab file or ticket cache.But, due to performance, I want to connect my oracle database using Spark. If I use simple username and password, I am able to connect my spark application to Oracle database using below snippet: Dataset<Row> empDF = sparkSession.read().format("jdbc") .option("url", "jdbc:oracle:thin:hr/1234@//127.0.0.1:1522/orcl") .option("dbtable", "hr.employees") //.option("user", "hr") //

问题 For the purpose of a task I have to store an image into MySQL as a blob format (even though it would have been better and ideal to store the image path in the database and keep the image in a folder in localcopy). So far I have researched and couldn't find any answer that could help me, this is what I have done so far Soon as a button click, this will be fired: empdao.insertImage(fis); Image is populated on another even listener like this : static FileInputStream fis = null; static String

问题 For the purpose of a task I have to store an image into MySQL as a blob format (even though it would have been better and ideal to store the image path in the database and keep the image in a folder in localcopy). So far I have researched and couldn't find any answer that could help me, this is what I have done so far Soon as a button click, this will be fired: empdao.insertImage(fis); Image is populated on another even listener like this : static FileInputStream fis = null; static String

问题 I have SQL query which joins 3 tables, one being just a many-to-many connecting the other two. I use a Spring JDBC ResultSetExtractor to convert the ResultSet into my Objects which look roughly like this: class Customer { private String id; private Set<AccountType> accountTypes; ... } The ResultSetExtractor implementation looks like this: public List<Client> extractData(ResultSet rs) throws SQLException, DataAccessException { Map<Integer, Client> clientsMap = new LinkedHashMap<Integer, Client

问题 What are the differences between JDBC Connector and Debezium SQL Server CDC Connector (or any other relational database connector) and when should I choose one over another, searching for a solution to sync between two relational databases? Not sure if this discussion should be about CDC vs JDBC Connector, and not Debezium SQL Server CDC Connector, or even just Debezium, looking forward for later editing, depends on the given answers (Though my case is about SQL Server sink). Sharing with you

问题 I have a running local instance of PostgreSql on a linux machine. When I use psql command from the shell I success to log in without any problem. I need to connect to the PostgreSql via the JDBC, but I don't know what exactly should I pass as url parameter to DriverManager.getConnection() . It should start with jdbc:postgresql: but what's going next? I was told by the system group that a database with was created like user name. e.g. if my user is jutky a db named jutky was created, but when

问题 I've developed a Java application (a dictionary) with an Access database to store the words of the dictionary and I'm getting ready to distribute it. I want to encrypt my database with a password to prevent people to access my words. When I set a passwords the Java code shows this Exception net.ucanaccess.jdbc.UcanaccessSQLException: Decoding not supported. Please choose a CodecProvider which supports reading the current database encoding. at net.ucanaccess.jdbc.UcanaccessDriver.connect

问题 How can I parse a JDBC URL (oracle or sqlserver) to get the hostname, port, and database name. The formats of the URL are different. 回答1: Start with something like this: String url = "jdbc:derby://localhost:1527/netld;collation=TERRITORY_BASED:PRIMARY"; String cleanURI = url.substring(5); URI uri = URI.create(cleanURI); System.out.println(uri.getScheme()); System.out.println(uri.getHost()); System.out.println(uri.getPort()); System.out.println(uri.getPath()); Output from the above: derby

问题 How can I parse a JDBC URL (oracle or sqlserver) to get the hostname, port, and database name. The formats of the URL are different. 回答1: Start with something like this: String url = "jdbc:derby://localhost:1527/netld;collation=TERRITORY_BASED:PRIMARY"; String cleanURI = url.substring(5); URI uri = URI.create(cleanURI); System.out.println(uri.getScheme()); System.out.println(uri.getHost()); System.out.println(uri.getPort()); System.out.println(uri.getPath()); Output from the above: derby