jdbc

问题 package com.cg.tr.jdbc; import java.sql.Connection; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import com.cg.trg.utilself.DBUtilSelf; public class MenuBase { public static void main(String[] args) { Connection connection = DBUtilSelf.openConnection(); System.out.println("Connection opened"); String sql="SELECT BNUM FROM BOOK"; try { Statement st=connection.createStatement(); ResultSet rs=st.executeQuery(sql); System.out.println("Book details"); while

问题 Kafka JDBC Sink Connector gives a Null Pointer Exception for a message with schema having an optional field here 'parentId'. Have I missed anything? I am using out of the box JSONConverter and JDBC Sink Connector A message on Kafka topic is { "schema":{ "type":"struct", "fields":[ { "field":"id", "type":"string" }, { "field":"type", "type":"string" }, { "field":"eventId", "type":"string" }, { "field":"parentId", "type":"string", "optional":true }, { "field":"created", "type":"int64", "name":

问题 I'm trying to do some testing on our JDBC driver using Python. Initially figuring out JPype, I eventually managed to connect the driver and execute select queries like so (reproducing a generalized snippet): from __future__ import print_function from jpype import * #Start JVM, attach the driver jar jvmpath = 'path/to/libjvm.so' classpath = 'path/to/JDBC_Driver.jar' startJVM(jvmpath, '-ea', '-Djava.class.path=' + classpath) # Magic line 1 driver = JPackage('sql').Our_Driver # Initiating a

问题 I'm trying to do some testing on our JDBC driver using Python. Initially figuring out JPype, I eventually managed to connect the driver and execute select queries like so (reproducing a generalized snippet): from __future__ import print_function from jpype import * #Start JVM, attach the driver jar jvmpath = 'path/to/libjvm.so' classpath = 'path/to/JDBC_Driver.jar' startJVM(jvmpath, '-ea', '-Djava.class.path=' + classpath) # Magic line 1 driver = JPackage('sql').Our_Driver # Initiating a

问题 an java.sql.SQLException: No suitable driver found for jdbc:h2:tcp://localhost/~/ZadatakDB is thrown when I try to connect to h2 database using a java web application. I can use H2 console without any issue, and pinging is successfull. I've also added h2-1.3.176 jar file to Libraries AND to WEB-INF/lib. Here is my Java method I am using to connect: private static Connection connectToDatabase() throws SQLException, IOException { String url = "jdbc:h2:tcp://localhost/~/ZadatakDB"; String

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . Im planning to learn jdbc topic. I have downloaded the HSQL DB from the site and extracted the zip file. I have few queries: How do we create a new database? Will we be able to see the contents of the db via any

问题 Does anyone know how to get the column names of an index that spans multiple columns (see SQL ) via JDBC ? I do know how to get all index columns (see code), but this way I cannot see which columns are linked to a single index. CREATE TABLE IF NOT EXISTS `foo` ( `id` int(11) NOT NULL AUTO_INCREMENT, `test1` int(11) NOT NULL, `test2` int(11) NOT NULL, PRIMARY KEY (`id`), UNIQUE KEY `test1` (`test1`,`test2`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ; DatabaseMetaData md =

问题 I have a query written to run on an Oracle database which uses the function REGEXP_LIKE to filter some rows from the query. The specific function call is regexp_like(col1, '[^[:alpha:]]') The problem is when I run the query on H2 I get the following error: org.h2.jdbc.JdbcSQLException: Function "REGEXP_LIKE" not found If I run the query directly on the Oracle database using the SQLDeveloper tool it returns as expected. Any ideas what could be causing this? 回答1: H2 doesn't have a function

问题 Hello all i want to display entire content of my database table on html page.I am trying to fetch record from database first and store in ArrayList but when i return array list on html page it display only last record repeatedly as count of my database table. Here is the code below : public ArrayList<CustomerDTO> getAllCustomers() { ArrayList<CustomerDTO> customers = new ArrayList<CustomerDTO>(); CustomerDTO customer = null; Connection c; try { c = openConnection(); Statement statement = c

问题 I have to use JDBC to write to a database (hibernate/ibatis is not an option) and my database is Oracle 11g. I create the following query: insert into user(user_id, username, age, creation_ts) values(seq_userid.NEXTVAL, 'Jack', 19,TO_TIMESTAMP('14/12/2010 15/09/46', 'DD/MM/RR HH24/MI/SS')); However my statetement.execeuteUpdate(above sql) . generates an invalid sign exception. But when I perform the query in squirrel it gets commited just fine. Does anyone know why this is happening? Edit: