Question

以下查询在hsqldb 2.3.2中失败，sql.syntax_ora = true 在Oracle 11中正常工作。
它是一个名为hibernate的查询，用于TestNG测试，用于内存中的hsqldb，而不是真正的Oracle。错误消息是：java.sql.SQLSyntaxErrorException：意外令牌：需要ORDER：）：line：16，指的是 row_number（）over（按lastUpdateTime desc排序）区域：

select  
        id         as id1_9_0_,  
        version    as version2_9_0_,  
        lastUpdateTime as lastUpda7_9_0_,  
        eventType    as eventTyp3_9_0_,  
        clientJid    as clientJi4_9_0_,  
        topicName as topicNam5_9_0_,  
        attributes as attribut6_9_0_  
    from (select logEvents.id as id,  
                 logEvents.version as version,  
                 logEvents.lastUpdateTime as lastUpdateTime,  
                 logEvents.eventType as eventType,  
                 logEvents.clientJid as clientJid,  
                 logEvents.topicName as topicName,  
                 logEvents.attributes as attributes,  
                 row_number() over (order by lastUpdateTime desc) rn    from xyz_logEvent logEvents)  
    where rn between 1 and 4 order by rn;

Answer 1

HSQLDB并不支持所有可能的SQL语法。 row_number() over (order by ...)为row_number() over ()时不支持(select logEvents.id as id, logEvents.version as version, logEvents.lastUpdateTime as lastUpdateTime, logEvents.eventType as eventType, logEvents.clientJid as clientJid, logEvents.topicName as topicName, logEvents.attributes as attributes, row_number() over () rn from xyz_logEvent logEvents order by lastUpdateTime limit 4)。

替代方案可能如下所示：

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在oracle语法模式下，oracle查询在内存中的hsqldb中失败

1 个答案: