spring - JdbcTemplate - 使用 SQL MERGE 插入或更新 Oracle BLOB

Question

使用 JdbcTemplate 我想调用 MERGE SQL 语句，它将向表中插入一条新记录，或者如果具有特定键的行已经存在则进行更新。关键部分是其中一列是Oracle BLOB类型。

这是我到目前为止的尝试:

尝试 1。

SQL语句:

    String sql = ""
            + "MERGE INTO file_thumbnails "
            + "     USING (SELECT ? as file_c_id, ? as thumbnail_type, ? as thumbnail_image FROM DUAL) tmp "
            + "        ON (file_thumbnails.file_c_id = tmp.file_c_id AND "
            + "            file_thumbnails.thumbnail_type = tmp.thumbnail_type) "
            + "      WHEN MATCHED THEN "
            + "        UPDATE "
            + "           SET thumbnail_image = tmp.thumbnail_image "
            + "              ,thumbnail_date = SYSDATE "
            + "      WHEN NOT MATCHED THEN "
            + "        INSERT (c_id, file_c_id, thumbnail_type, thumbnail_image, thumbnail_date) "
            + "        VALUES (cedar_c_id_seq.nextval, tmp.file_c_id, tmp.thumbnail_type, tmp.thumbnail_image, SYSDATE)";

数据库调用:

List<Object[]> x = fileList.stream().map(file -> {
    byte[] thumbnail = file.getThumbnail();
    SqlLobValue sqlLobValue = new SqlLobValue(new ByteArrayInputStream(thumbnail), thumbnail.length, new DefaultLobHandler());
    return new Object[] { file.getFileCId(), file.getType().toString(), sqlLobValue};
}).collect(Collectors.toList());
jdbcTemplate.batchUpdate(sql, x, new int[] { OracleTypes.NUMBER, OracleTypes.VARCHAR, OracleTypes.BLOB});

异常(exception):

Caused by: org.springframework.jdbc.UncategorizedSQLException: PreparedStatementCallback; uncategorized SQLException for SQL [MERGE INTO file_thumbnails      USING (SELECT ? as file_c_id, ? as thumbnail_type, ? as thumbnail_image FROM DUAL) tmp         ON (file_thumbnails.file_c_id = tmp.file_c_id AND             file_thumbnails.thumbnail_type = tmp.thumbnail_type)       WHEN MATCHED THEN         UPDATE            SET thumbnail_image = tmp.thumbnail_image               ,thumbnail_date = SYSDATE       WHEN NOT MATCHED THEN         INSERT (c_id, file_c_id, thumbnail_type, thumbnail_image, thumbnail_date)         VALUES (cedar_c_id_seq.nextval, tmp.file_c_id, tmp.thumbnail_type, tmp.thumbnail_image, SYSDATE)]; SQL state [72000]; error code [1461]; ORA-01461: can bind a LONG value only for insert into a LONG column
; nested exception is java.sql.BatchUpdateException: ORA-01461: can bind a LONG value only for insert into a LONG column

    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:84) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:649) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:662) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.batchUpdate(JdbcTemplate.java:950) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.BatchUpdateUtils.executeBatchUpdate(BatchUpdateUtils.java:32) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.batchUpdate(JdbcTemplate.java:1000) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at cern.edms.thumbnails.generator.repository.EdmsFileRepository.saveThumbnails(EdmsFileRepository.java:61) ~[classes/:na]
    at cern.edms.thumbnails.generator.repository.EdmsFileRepository$$FastClassBySpringCGLIB$$e3d79386.invoke(<generated>) ~[classes/:na]
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:721) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) ~[spring-tx-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:656) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at cern.edms.thumbnails.generator.repository.EdmsFileRepository$$EnhancerBySpringCGLIB$$70f43ba5.saveThumbnails(<generated>) ~[classes/:na]
    at cern.edms.thumbnails.generator.Application.run(Application.java:58) [classes/:na]
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:776) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    ... 6 common frames omitted
Caused by: java.sql.BatchUpdateException: ORA-01461: can bind a LONG value only for insert into a LONG column

    at oracle.jdbc.driver.OraclePreparedStatement.executeBatch(OraclePreparedStatement.java:10401) ~[ojdbc6-11.2.0.3.0.jar:11.2.0.3.0]
    at oracle.jdbc.driver.OracleStatementWrapper.executeBatch(OracleStatementWrapper.java:230) ~[ojdbc6-11.2.0.3.0.jar:11.2.0.3.0]
    at org.springframework.jdbc.core.JdbcTemplate$4.doInPreparedStatement(JdbcTemplate.java:966) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate$4.doInPreparedStatement(JdbcTemplate.java:950) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:633) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    ... 21 common frames omitted

尝试 2。

Sql statement:
        String sql = ""
                + "MERGE INTO file_thumbnails "
                + "     USING (SELECT ? as file_c_id, ? as thumbnail_type FROM DUAL) tmp "
                + "        ON (file_thumbnails.file_c_id = tmp.file_c_id AND "
                + "            file_thumbnails.thumbnail_type = tmp.thumbnail_type) "
                + "      WHEN MATCHED THEN "
                + "        UPDATE "
                + "           SET thumbnail_image = ? "
                + "              ,thumbnail_date = SYSDATE "
                + "      WHEN NOT MATCHED THEN "
                + "        INSERT (c_id, file_c_id, thumbnail_type, thumbnail_image, thumbnail_date) "
                + "        VALUES (cedar_c_id_seq.nextval, tmp.file_c_id, tmp.thumbnail_type, ?, SYSDATE)";

数据库调用:

List<Object[]> x = fileList.stream().map(file -> {
    byte[] thumbnail = file.getThumbnail();
    SqlLobValue sqlLobValue = new SqlLobValue(new ByteArrayInputStream(thumbnail), thumbnail.length, new DefaultLobHandler());
    SqlLobValue sqlLobValue2 = new SqlLobValue(new ByteArrayInputStream(thumbnail), thumbnail.length, new DefaultLobHandler());
    return new Object[] { file.getFileCId(), file.getType().toString(), sqlLobValue, sqlLobValue2 };
}).collect(Collectors.toList());
jdbcTemplate.batchUpdate(sql, x, new int[] { OracleTypes.NUMBER, OracleTypes.VARCHAR, OracleTypes.BLOB, OracleTypes.BLOB });

异常(exception):

Caused by: org.springframework.jdbc.UncategorizedSQLException: PreparedStatementCallback; uncategorized SQLException for SQL [MERGE INTO file_thumbnails      USING (SELECT ? as file_c_id, ? as thumbnail_type FROM DUAL) tmp         ON (file_thumbnails.file_c_id = tmp.file_c_id AND             file_thumbnails.thumbnail_type = tmp.thumbnail_type)       WHEN MATCHED THEN         UPDATE            SET thumbnail_image = ?               ,thumbnail_date = SYSDATE       WHEN NOT MATCHED THEN         INSERT (c_id, file_c_id, thumbnail_type, thumbnail_image, thumbnail_date)         VALUES (cedar_c_id_seq.nextval, tmp.file_c_id, tmp.thumbnail_type, ?, SYSDATE)]; SQL state [63000]; error code [3106]; ORA-03106: fatal two-task communication protocol error
; nested exception is java.sql.BatchUpdateException: ORA-03106: fatal two-task communication protocol error

    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:84) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:649) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:662) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.batchUpdate(JdbcTemplate.java:950) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.BatchUpdateUtils.executeBatchUpdate(BatchUpdateUtils.java:32) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.batchUpdate(JdbcTemplate.java:1000) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at cern.edms.thumbnails.generator.repository.EdmsFileRepository.saveThumbnails(EdmsFileRepository.java:62) ~[classes/:na]
    at cern.edms.thumbnails.generator.repository.EdmsFileRepository$$FastClassBySpringCGLIB$$e3d79386.invoke(<generated>) ~[classes/:na]
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:721) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) ~[spring-tx-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:656) ~[spring-aop-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at cern.edms.thumbnails.generator.repository.EdmsFileRepository$$EnhancerBySpringCGLIB$$587b6598.saveThumbnails(<generated>) ~[classes/:na]
    at cern.edms.thumbnails.generator.Application.run(Application.java:58) [classes/:na]
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:776) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    ... 6 common frames omitted
Caused by: java.sql.BatchUpdateException: ORA-03106: fatal two-task communication protocol error

    at oracle.jdbc.driver.OraclePreparedStatement.executeBatch(OraclePreparedStatement.java:10401) ~[ojdbc6-11.2.0.3.0.jar:11.2.0.3.0]
    at oracle.jdbc.driver.OracleStatementWrapper.executeBatch(OracleStatementWrapper.java:230) ~[ojdbc6-11.2.0.3.0.jar:11.2.0.3.0]
    at org.springframework.jdbc.core.JdbcTemplate$4.doInPreparedStatement(JdbcTemplate.java:966) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate$4.doInPreparedStatement(JdbcTemplate.java:950) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:633) ~[spring-jdbc-4.3.7.RELEASE.jar:4.3.7.RELEASE]
    ... 21 common frames omitted

附加说明。

1. 在数据库调用的第二次尝试中，我无法使用相同的 SqlLobValue 对象两次，因为我遇到了异常:

   引起:java.sql.SQLException:重复的流参数:4

2. 如果我要进行第二次尝试，但只将 BLOB 输入参数放入一次(例如，仅放入 MERGE 语句的 INSERT 部分)，它会正常工作。但这当然不能解决我的问题。

你能帮忙吗？

Answer 1

感谢@gvenzi 的回答，我解决了这个问题，但由于我有一些额外的评论，所以决定发布我自己的答案。

所以，是的，OracleLobHandler 解决了这个问题。但实际上我们并不是被迫使用deprecated class。在OracleLobHandler documentation我找到了

Deprecated. in favor of DefaultLobHandler for the Oracle 10g driver and higher. Consider using the 10g/11g driver even against an Oracle 9i database! DefaultLobHandler.setCreateTemporaryLob(boolean) is the direct equivalent of this OracleLobHandler's implementation strategy, just using standard JDBC 4.0 API. That said, in most cases, regular DefaultLobHandler setup will work fine as well.

我测试了它，它有效。

但我在 PreparedStatementSetter 中将 SqlLobValue 与 OracleTypes.BLOB 一起使用时遇到了另一个问题(此处有描述 ClassCastException: SqlLobValue cannot be cast to oracle.sql.BLOB using PreparedStatementSetter )

我的最终工作代码如下:

public void saveThumbnails(List<Thumbnail> fileList) throws SQLException, IOException {

    BatchPreparedStatementSetter b = new BatchPreparedStatementSetter() {
        @Override
        public void setValues(PreparedStatement ps, int i) throws SQLException {
            Thumbnail thumbnail = fileList.get(i);
            byte[] thumbnailBytes = thumbnail.getThumbnail();
            ps.setObject(1, thumbnail.getFileCId(), OracleTypes.NUMBER);
            ps.setObject(2, thumbnail.getType().toString(), OracleTypes.VARCHAR);
            DefaultLobHandler lobHandler = new DefaultLobHandler();
            lobHandler.setCreateTemporaryLob(true);
            lobHandler.getLobCreator().setBlobAsBytes(ps, 3, thumbnailBytes);
        }

        @Override
        public int getBatchSize() {
            return fileList.size();
        }
    };
    jdbcTemplate.batchUpdate(getSaveThumbnailSql(), b);
}

private String getSaveThumbnailSql() {
    // @formatter:off
    String sql = ""
            + "MERGE INTO file_thumbnails "
            + "     USING (SELECT ? as file_c_id, ? as thumbnail_type, ? AS thumbnail_image FROM DUAL) tmp "
            + "        ON (file_thumbnails.file_c_id = tmp.file_c_id AND "
            + "            file_thumbnails.thumbnail_type = tmp.thumbnail_type) "
            + "      WHEN MATCHED THEN "
            + "        UPDATE "
            + "           SET thumbnail_image = tmp.thumbnail_image"
            + "              ,thumbnail_date = SYSDATE "
            + "      WHEN NOT MATCHED THEN "
            + "        INSERT (c_id, file_c_id, thumbnail_type, thumbnail_image, thumbnail_date) "
            + "        VALUES (cedar_c_id_seq.nextval, tmp.file_c_id, tmp.thumbnail_type, tmp.thumbnail_image , SYSDATE)";
    //@formatter:on
    return sql;
}