[英]Oracle Continuos query notification ORA-29979
我正在嘗試使用 Oracle JDBC 從 Oracle 表 (19c) 注冊更改通知。 由於查詢包含一個 JOIN 我正在使用 BEST 努力模式。 我的用戶已被“授予”更改通知權限。
在這一點上,我只是想讓通知者接受任何查詢。 這不是最終版本,但我知道我們需要一個涉及兩個表的查詢。 將查詢更改為更簡單的查詢,如SELECT * from SCDAT.SECURITIES WHERE SCDAT.SECURITIES.INSTYPE = 28
給出相同的 output。
測試代碼
log.info("init changelistener");
log.info("Get datasource from Spring application context");
oracleDataSource = context.getBean("dataSource", OracleDataSource.class);
log.info("Cet Oracle connection from datasource");
oracle.jdbc.OracleConnection connection = (OracleConnection) oracleDataSource.getConnection();
Properties properties = new Properties();
properties.setProperty(OracleConnection.DCN_NOTIFY_ROWIDS, "true");
properties.setProperty(OracleConnection.DCN_QUERY_CHANGE_NOTIFICATION, "true");
properties.setProperty(OracleConnection.DCN_BEST_EFFORT, "true");
log.info("DCN property settings: {}", properties);
log.info("Register change notification to connection");
dcr = connection.registerDatabaseChangeNotification(properties);
//create statement
Statement stmt = connection.createStatement();
// associate the statement with the registration:
((OracleStatement) stmt).setDatabaseChangeRegistration(dcr);
log.info("Executing query {}", query);
ResultSet rs = stmt.executeQuery(query);
while (rs.next()) {
// Do Nothing
}
log.info("attach listener to the processor");
dcr.addListener(this);
String[] tableNames = dcr.getTables();
for (int i = 0; i < tableNames.length; i++)
log.info(tableNames[i] + " is part of the registration.");
日志 output
2021-03-30 12:56:15.983 INFO 5180 --- [main] c.c.dbnotifier.OracleChangeListener : init changelistener
2021-03-30 12:56:15.983 INFO 5180 --- [main] c.c.dbnotifier.OracleChangeListener : Get datasource from Spring application context
2021-03-30 12:56:15.983 INFO 5180 --- [main] c.c.dbnotifier.OracleChangeListener : Cet Oracle connection from datasource
2021-03-30 12:56:16.061 INFO 5180 --- [main] c.c.dbnotifier.OracleChangeListener : DCN property settings: {DCN_QUERY_CHANGE_NOTIFICATION=true, DCN_BEST_EFFORT=true, DCN_NOTIFY_ROWIDS=true}
2021-03-30 12:56:16.061 INFO 5180 --- [main] c.c.dbnotifier.OracleChangeListener : Register change notification to connection
2021-03-30 12:56:16.077 INFO 5180 --- [main] c.c.dbnotifier.OracleChangeListener : Executing query SELECT SCDAT.TRANSMAIN.TRANSEX from SCDAT.TRANSMAIN,SCDAT.SECURITIES WHERE SCDAT.TRANSMAIN.SECIK = SCDAT.SECURITIES.SECIK AND SCDAT.SECURITIES.INSTYPE = 28
2021-03-30 12:56:16.295 WARN 5180 --- [main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'oracleChangeListener': Invocation of init method failed; nested exception is java.sql.SQLException: ORA-29979: ikke støttet radstørrelse for endringsvarsling for spørringsresultat
這里解釋了錯誤 ORA-29979 https://www.oraexcel.com/database-oracle-11gR2-ORA-29979但根據 dbadmin,數據庫上的 COMPATIBLE 設置為 19.0.0。
我應該補充一點,使用同一用戶在 sqldeveloper 中運行查詢可以正常工作。
關於如何進行的任何建議或想法?
/卡特琳娜
您將不得不切換到“表更改通知”,因為您的表有太多列以支持“查詢更改通知”。 刪除此行或將其注釋掉:
// properties.setProperty(OracleConnection.DCN_QUERY_CHANGE_NOTIFICATION, "true");
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