我有尝试参数间隔参数在我的Oracle查询的问题:Spring命名参数:如何在我的查询中参数化Oracle间隔?
select current_timestamp - interval :hours hour from dual
如果我更换固定的时间间隔参数,然后执行就好了。
在SQL中尝试了带引号和不带引号的参数。
使用以下最小片段见的图示:
public class Main {
private static String SQL_CONSTANT_INTERVAL = "select current_timestamp - interval '1' hour from dual";
private static String SQL_PARAMETERIZED_INTERVAL_QUOTED = "select current_timestamp - interval ':hours' hour from dual";
private static String SQL_PARAMETERIZED_INTERVAL_UNQUOTED = "select current_timestamp - interval :hours hour from dual";
public static void main(String[] args) throws Exception {
Properties properties = new Properties();
properties.load(Main.class.getClassLoader().getSystemResourceAsStream("db.properties"));
DataSource dataSource = BasicDataSourceFactory.createDataSource(properties);
NamedParameterJdbcTemplate npTemplate = new NamedParameterJdbcTemplate(dataSource);
Map<String, String> params = Collections.singletonMap("hours", "1");
String[] queries =
new String[] { SQL_CONSTANT_INTERVAL, SQL_PARAMETERIZED_INTERVAL_QUOTED, SQL_PARAMETERIZED_INTERVAL_UNQUOTED };
for (String q : queries) {
System.out.println("Executing " + q);
try {
System.out.println("Result = " + npTemplate.queryForObject(q, params, String.class));
} catch (RuntimeException e) {
System.out.println("Error: " + e);
}
System.out.println();
}
}
}
输出:
Executing select current_timestamp - interval '1' hour from dual
Result = 2013-01-24 18:55:16.373 Europe/Moscow
Executing select current_timestamp - interval ':hours' hour from dual
24-Jan-2013 20:55:16 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [org/springframework/jdbc/support/sql-error-codes.xml]
24-Jan-2013 20:55:16 org.springframework.jdbc.support.SQLErrorCodesFactory <init>
INFO: SQLErrorCodes loaded: [DB2, Derby, H2, HSQL, Informix, MS-SQL, MySQL, Oracle, PostgreSQL, Sybase]
Error: org.springframework.dao.DataIntegrityViolationException: PreparedStatementCallback; SQL [select current_timestamp - interval ':hours' hour from dual]; ORA-01867: the interval is invalid
; nested exception is java.sql.SQLDataException: ORA-01867: the interval is invalid
Executing select current_timestamp - interval :hours hour from dual
Error: org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; bad SQL grammar [select current_timestamp - interval ? hour from dual]; nested exception is java.sql.SQLSyntaxErrorException: ORA-00923: FROM keyword not found where expected
的源代码:https://gist.github.com/4632533 – vitaly