Question

我正在尝试在oracle中进行合并：

preparedStatement = dbConnection.prepareStatement("MERGE INTO dev_corpus a " +
                          "USING (SELECT ? corpusid, ? corpus_name, ? corpusdesc, ? corpusimageids, ? rocf1, ? rocf2, ? rocf3, ? rocc1, ? rocc2, ? rocc3, ? corpusactive, ? corpusrunfrequency, ? corpuslastrun, ? corpuslastsync, ? rocsettingid, ? corpusaffinity, ? corpusterms, ? corpusdomain FROM dual) incoming " +
                          "ON (a.corpusid = incoming.corpusid ) " +
                          "WHEN MATCHED THEN " +
                          "UPDATE SET (a.corpus_name = incoming.corpus_name AND a.corpusdesc = incoming.corpusdesc AND a.corpusimageids = incoming.corpusimageids AND a.rocf1 = incoming.rocf1 AND a.rocf2 = incoming.rocf2 AND a.rocf3 = incoming.rocf3 AND a.rocc1 = incoming.rocc1 AND a.rocc2 = incoming.rocc2 AND a.rocc3 = incoming.rocc3 AND a.corpusactive = incoming.corpusactive AND a.corpusrunfrequency = incoming.corpusrunfrequency AND a.corpuslastrun = incoming.corpuslastrun AND a.corpuslastsync = incoming.corpuslastsync AND a.rocsettingid = incoming.rocsettingid AND a.corpusaffinity = incoming.corpusaffinity AND a.corpusterms = incoming.corpusterms AND a.corpusdomain = incoming.corpusdomain) " +
                          "WHEN NOT MATCHED THEN " +
                          "INSERT (a.corpusid, a.corpus_name, a.corpusdesc, a.corpusimageids, a.rocf1, a.rocf2, a.rocf3, a.rocc1, a.rocc2, a.rocc3, a.corpusactive, a.corpusrunfrequency, a.corpuslastrun, a.corpuslastsync, a.rocsettingid, a.corpusaffinity, a.corpusterms, a.corpusdomain) " +
                          "VALUES (incoming.corpusid, incoming.corpus_name, incoming.corpusdesc, incoming.corpusimageids, incoming.rocf1, incoming.rocf2, incoming.rocf3, incoming.rocc1, incoming.rocc2, incoming.rocc3, incoming.corpusactive, incoming.corpusrunfrequency, incoming.corpuslastrun, incoming.corpuslastsync, incoming.rocsettingid, incoming.corpusaffinity, incoming.corpusterms, incoming.corpusdomain)");

我收到此错误：

    ORA-01747: invalid user.table.column, table.column, or column specification

java.sql.SQLSyntaxErrorException: ORA-01747: invalid user.table.column, table.column, or column specification

    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:447)
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:396)
    at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:879)
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:505)
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:223)
    at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:531)
    at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:207)
    at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:1044)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1328)
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3593)
    at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3674)
    at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeUpdate(OraclePreparedStatementWrapper.java:1354)
    at com.mycompany.datalayer.DB.insertToTaxonomy(DB.java:261)
    at com.mycompany.datalayer.DB.restoreBackUp(DB.java:94)
    at com.mycompany.datalayer.DB.startProcess(DB.java:56)
    at com.mycompany.oraclebackup.App.main(App.java:13)

现在，我检查了它们正确的列名。你知道这是什么问题吗？我该如何解决？（p.s：我没有使用休眠）

谢谢！

Answer 1

在Java Prepared声明中，您可以使用＆＃39;？＆＃39;仅适用于where子句中的列名。您正试图将此概念扩展到其他地方，这是无效的。以下是代码中有问题的部分：

SELECT ? corpusid, ? corpus_name, ? corpusdesc

以下是javadocs的说明：

注意：设置IN参数值的setter方法（setShort，setString等）必须指定兼容的类型使用输入参数的已定义SQL类型。例如，如果 IN参数有SQL类型INTEGER，那么方法setInt应该是使用

Answer 2

我猜测像corpusid，corpusimageids等字段可能不会在数据库的dev_corpus表中存储为与字符串相关的数据类型（例如。varchar）。它们可能是整数或数字字段。

我觉得当你更换＆＃39;？＆＃39;中的参数时，它们会作为字符串字段传递。（例如，您可能正在使用字符串数组来传递这些参数）。在这种情况下，您必须确保在查询本身中处理参数的数据类型，并参考表dev_corpus中使用的数据类型。

例如。假设字段corpusid在数据库表中的类型为number，则查询应为：

preparedStatement = dbConnection.prepareStatement("MERGE INTO dev_corpus a " +
                          "USING (SELECT to_number(?) corpusid, ? corpus_name, ? corpusdesc, ? corpusimageids, ? rocf1,..."

字符串字段（char，varchar）以外的任何字段都可能需要特别注意..e

to_date(column_name,'dd-mm-yyyy')

merge_oracle_ORA-01747：user.table.column，table.column或列规范无效

2 个答案: