KDB JDBC DRIVER

Updated the post to include the code. Here I am handling only the SQLException s and masking all the others - which generally is not a good practice. We are using RowCallbackHandler as we shall be processing the rows immediately. The q language 3. You can do away with all the SQL cuteness and run q statements directly by prefixing q statements with q. Apart from that NullPointerException is generated if a statement returns nothing upon execution such as assignment expressions somevar:

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That is, you cannot open a connection, explicitly begin a transaction, issue a series of separate queries within that transaction and finally kdh back or commit the transaction. In practice, this means that any single query or sequence of queries if executed in a single JDBC call will be executed in kdh without noticing the effects of other queries, and modifications made to the database will always be permanent.

Although it is not necessary to call the close method on! ResultSet ; import java. Post as a guest Name.

InputStreamReader ; import java. Autowired ; import org. Amazon Storage Gateway D. Still have kxb luck with PreparedStatement execution though. One drawback is that it does not support retrieving result that is not a table. BufferedReader ; import java. Sign up using Facebook.

java - Executing queries in KDB database using JDBC - Stack Overflow

jdhc By clicking "Post Your Answer", you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policy hdbc, and that your continued use of the website is subject to these policies. But whenever I try to run other queries, then the code gives me error, for example, for the following code: Sign up using Email and Password. I am going to use the first approach. SpringBootApplication ; import org.

JdbcTemplate ; import java.

If little work is being performed per interaction via the JDBC driver, that is, few queries and each query is very quick to execute, then there is a significant advantage jdbd using connection pooling. ResultSetStatement ,! I used that as well, still the same error encountered.

jdbc kdb connection url string - Kdb+ / qStudio

Operations must be prefixed by "q " in order to be executed as q statements. SpringApplication ; import org.

CommandLineRunner ; import org. We are using RowCallbackHandler as we shall be processing the rows immediately. Spring boot will automatically configure the datasource class from the application. You can add it as a build dependency or add to your local maven repo and use it as a maven dependency. The jdbc implementation makes it easy to interface with a kdb database providing higher level methods to establish a database connection, parse the returned object.

I am able to execute the following code to select all the data from the table: You can choose any port you like. Here I am handling only the SQLException s and masking all the others - which generally is not a good practice. The implementation builds on the lower-level javakdb APIwhich is somewhat simpler, and a good choice for application development when support for legacy code is not a consideration. Connection pooling If little work is being performed per interaction via the JDBC driver, that is, few queries and each query is very quick to execute, then there is a significant advantage to using connection pooling.

Furthermore it offers configuration options to check the status of connections in the connection pool using a variety of strategies. I tried using prepared statements too code is as followsbut still, no luck: