hsqldb

问题 I want to run unit tests by generating all tables in HSQLDB, present in my oracle database. For that I want to export all DDL create table statements from oracle tables. I tried export database, but along with create table sql I am getting lot other SQLs like, " PARTITION BY RANGE ("CREATION_DATE") " etc. How do I export all oracle tables(schema) to HSQLDB? is there any better way? 回答1: You can use the DBMS_METADATA.GET_DDL() function to get the table definition, and modify what is included

问题 I have followed the infocenter docs to setup Worklight on Liberty and Oracle Database all on Windows 2008. (http://pic.dhe.ibm.com/infocenter/wrklight/v6r0m0/topic/com.ibm.worklight.help.doc/devref/t_transporting_apps_and_adapters.html - Deploying IBM Worklight applications to test and production environments) When I start the liberty server, I get this error on the browser Exception thrown by application class 'com.worklight.core.auth.impl.AuthenticationFilter.doFilter:110' javax.servlet

问题 I am using HSQLDB(file mode), Spring 4.2.2 , Hibernate 5, JavaFX in my project. My database is starting in the file-mode. database.xml: <?xml version="1.0" encoding="UTF-8"?> <beans:beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:beans="http://www.springframework.org/schema/beans" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www

问题 As soon as I trie to perform a em.persist(object) or em.merge(object) it crash. Em.remove() is working, as well as formated queries. Working on localhost. I'm using HSQLDB 1.8 to store data from a JAVA EE project using JPA ORM. The link to the DB is working fine as I'm able to query entities. @Stateful public class LibraryBean implements library.libraryservice.LibraryService { @PersistenceContext(name = "LibraryPU", type=PersistenceContextType.EXTENDED) private EntityManager em; public void

问题 I need to execute a query for retrieving the item with the soonest expire date for each customer. I have the following product table: PRODUCT |ID|NAME |EXPIRE_DATE|CUSTOMER_ID 1 |p1 |2013-12-31 |1 2 |p2 |2014-12-31 |1 3 |p3 |2013-11-30 |2 and I would like to obtain the following result: |ID|EXPIRE_DATE|CUSTOMER_ID 1 |2013-12-31 |1 3 |2013-11-30 |2 With Mysql I would have a query like: SELECT ID,min(EXPIRE_DATE),CUSTOMER_ID FROM PRODUCT GROUP BY CUSTOMER_ID But I am using HyperSQL and I am not

问题 I have got a bunch of working queries which can be executed correctly in MySQL. I would also need those statements in both hsqldb and oracle. There are number of tutorials which teach you how to create queries for hsqldb and oracle from scratch but they haven't explained how to translate the queries directly. What would you suggest me to do? If the queries were translated, would there be a way for me to test them? I cannot test the queries directly because I only have MySQL available. 回答1: If

问题 I have over 200 unit tests for my entire JPA backend and they all work great on hsql db 2.2. I have the tests running in a continuous build environment to verify the stability of the system. Except that when I ran them on Oracle 11, some tests failed with referential integrity constraints. It was due to a bug in my code but the fact that I couldn't find them in hsqldb concerns me and violates the whole point of having a lightweight-in-memory-jpa-compliant db when it's not really compliant! Is

问题 If I start the HSQLDB in server mode using my Java code, the server starts without any problem. However, when I try to connect to the same either through the Java code or through the HSQLDB DatabaseManagerSwing; I am unable to connect. I started the server with user=conn1 and password=conn1 in memory-only mode. But when connecting to the server it gave me following exception: java.sql.SQLInvalidAuthorizationSpecException: invalid authorization specification - not found: conn1 I can only

问题 I'm using HSQLDB for persisting a small data, in my query I want to create tables at first time and if they are not exist anymore. However with HSQLDB I cannot execute the query "CREATE TABLE XYS IF NOT EXISTS" like other dbms like mysql or mssql. Please give me solution for this case. 回答1: HSQLDB supports the syntax like the example below: CREATE TABLE IF NOT EXISTS xyx (a int, b varchar(10)) The syntax is supported by recent HSQLDB 2.3.X versions. 来源： https://stackoverflow.com/questions

问题 It seems NOWAIT is not supported by HSQLDB in Oracle syntax. HSQLDB version: 2.3.3 with SET DATABASE SQL SYNTAX ORA TRUE; Exception produced on the SQL select a, b, c from sometable where id=1 for update NOWAIT The exception Caused by: org.hsqldb.HsqlException: unexpected token: NOWAIT at org.hsqldb.error.Error.parseError(Unknown Source) at org.hsqldb.ParserBase.unexpectedToken(Unknown Source) at org.hsqldb.ParserCommand.compileStatement(Unknown Source) at org.hsqldb.Session.compileStatement