我想创建一个PreparedStatement来插入记录，或者如果ID已经存在则更新记录。
String sql = "INSERT INTO my_entity (id, name) VALUES(?, ?) ON DUPLICATE KEY UPDATE id=VALUES(id), name=VALUES(name)";
JdbcBatchItemWriter<MyEntity> w = new JdbcBatchItemWriter<>();
w.setDataSource(ds);
ItemPreparedStatementSetter<MyEntity> preparedStatementSetter = new ItemPreparedStatementSetter<MyEntity>() {
@Override
public void setValues(MyEntity item, PreparedStatement ps) throws SQLException {
ps.setString(1, item.getId());
ps.setString(2, item.getName());
}
};
w.setItemPreparedStatementSetter(preparedStatementSetter);
w.setSql(sql);
结果错误：ON属性存在语法错误。为什么呢？
[] 2015-01-09 11:31:17,764 ERROR : org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; bad SQL grammar; nested exception is org.postgresql.util.PSQLException: FEHLER: Syntaxerror at ?ON?
at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:231)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:660)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:673)
at org.springframework.batch.item.database.JdbcBatchItemWriter.write(JdbcBatchItemWriter.java:185)
at org.springframework.batch.core.step.item.SimpleChunkProcessor.writeItems(SimpleChunkProcessor.java:175)
at org.springframework.batch.core.step.item.FaultTolerantChunkProcessor.scan(FaultTolerantChunkProcessor.java:578)
at org.springframework.batch.core.step.item.FaultTolerantChunkProcessor.access$900(FaultTolerantChunkProcessor.java:50)
at org.springframework.batch.core.step.item.FaultTolerantChunkProcessor$3.doWithRetry(FaultTolerantChunkProcessor.java:346)
at org.springframework.retry.support.RetryTemplate.doExecute(RetryTemplate.java:263)
at org.springframework.retry.support.RetryTemplate.execute(RetryTemplate.java:193)
at org.springframework.batch.core.step.item.BatchRetryTemplate.execute(BatchRetryTemplate.java:217)
at org.springframework.batch.core.step.item.FaultTolerantChunkProcessor.write(FaultTolerantChunkProcessor.java:420)
at org.springframework.batch.core.step.item.SimpleChunkProcessor.process(SimpleChunkProcessor.java:199)
at org.springframework.batch.core.step.item.ChunkOrientedTasklet.execute(ChunkOrientedTasklet.java:75)
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:406)
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:330)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:271)
at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:77)
at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:368)
at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144)
at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:257)
at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:198)
at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:148)
at org.springframework.batch.core.job.AbstractJob.handleStep(AbstractJob.java:386)
at org.springframework.batch.core.job.SimpleJob.doExecute(SimpleJob.java:135)
at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:304)
at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135)
at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:128)
at org.springframework.boot.SpringApplication.runCommandLineRunners(SpringApplication.java:677)
at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:695)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:322)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:961)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:950)
caused by: org.postgresql.util.PSQLException: FEHLER: Syntaxerror at ?ON?
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2198)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1927)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:405)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:2892)
at org.springframework.batch.item.database.JdbcBatchItemWriter$1.doInPreparedStatement(JdbcBatchItemWriter.java:192)
at org.springframework.batch.item.database.JdbcBatchItemWriter$1.doInPreparedStatement(JdbcBatchItemWriter.java:185)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:644)
... 39 more