HSQL 中的模式级序列

Question

我在自动化组件测试中使用 HSQLDB 作为数据库。它模拟生产环境的 Oracle 数据库。

在我的 SQL 代码中，我在模式范围内定义了一个序列，例如

CREATE SEQUENCE THE_SCHEMA.THE_SEQUENCE ... ;

然后当我从这个架构中获取 nextval 时：

Connection con = ...
String query = "SELECT THE_SCHEMA.THE_SEQUENCE.nextval as MyNextVal from DUAL;"
PreparedStatement ps = con.prepareStatement(query);
ResultSet resultSet = ps.executeQuery();

我在 con.prepareStatement(query) 调用中收到如下错误。

当我像下面这样在全局范围内定义序列时，上面的代码运行良好

CREATE SEQUENCE THE_SEQUENCE ... ;

改变

String query = "SELECT THE_SEQUENCE.nextval as MyNextVal from DUAL;"

我的问题是 HSQL 是否支持模式级序列？

我错过了什么吗？

（我使用 SET DATABASE SQL SYNTAX ORA TRUE 开启了“Oracle 兼容模式”；）

堆栈跟踪：

Caused by: java.lang.NullPointerException
at org.hsqldb.RangeVariable.resolvesSchemaName(Unknown Source)
at org.hsqldb.RangeVariable.resolvesSchemaAndTableName(Unknown Source)
at org.hsqldb.RangeVariable.findColumn(Unknown Source)
at org.hsqldb.ExpressionColumn.resolveColumnReference(Unknown Source)
at org.hsqldb.ExpressionColumn.resolveColumnReferences(Unknown Source)
at org.hsqldb.QuerySpecification.resolveColumnReferencesAndAllocate(Unknown Source)
at org.hsqldb.QuerySpecification.resolveColumnReferences(Unknown Source)
at org.hsqldb.QuerySpecification.resolveReferences(Unknown Source)
at org.hsqldb.QueryExpression.resolve(Unknown Source)
at org.hsqldb.ParserDQL.compileCursorSpecification(Unknown Source)
at org.hsqldb.ParserCommand.compilePart(Unknown Source)
at org.hsqldb.ParserCommand.compileStatement(Unknown Source)
at org.hsqldb.Session.compileStatement(Unknown Source)
at org.hsqldb.StatementManager.compile(Unknown Source)
... 26 more
java.sql.SQLException: java.lang.NullPointerException java.lang.NullPointerException
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
at org.hsqldb.jdbc.JDBCPreparedStatement.<init>(Unknown Source)
at org.hsqldb.jdbc.JDBCConnection.prepareStatement(Unknown Source)

关于从 con.prepareStatement(query) 抛出的异常的详细信息：

Exception type java.sql.SQLException
cause = org.hsqldb.HsqlException: java.lang.NullPointerException
detailMessage = java.lang.NullPointerException java.lang.NullPointerException
next = null
SQLState = S1000
stackTrace = null
vendorCode = -458

Answer 1

请从http://hsqldb.org/support/获取最新的HSQLDB快照jar并检查问题是否已解决。