public List<Weather> getWeather(int cityId, int days) {
logger.info("days: " + days);
return getSimpleJdbcTemplate().query("SELECT weather.id, cities.name, weather.date, weather.degree " +
"FROM weather JOIN cities ON weather.city_id = cities.id " +
"WHERE weather.city_id = ? AND weather.date BETWEEN now()::date AND (now() + '? days')::date",
this.w_mapper, cityId, days);
}
错误:
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.dao.DataIntegrityViolationException: PreparedStatementCallback; SQL [SELECT weather.id, cities.name, weather.date, weather.degree FROM weather JOIN cities ON weather.city_id = cities.id WHERE weather.city_id = ? AND weather.date BETWEEN now()::date AND (now() + '? days')::date]; The column index is out of range: 2, number of columns: 1.; nested exception is org.postgresql.util.PSQLException: The column index is out of range: 2, number of columns: 1.
它适用于:
public List<Weather> getWeather(int cityId, int days) {
logger.info("days: " + days);
return getSimpleJdbcTemplate().query("SELECT weather.id, cities.name, weather.date, weather.degree " +
"FROM weather JOIN cities ON weather.city_id = cities.id " +
"WHERE weather.city_id = ? AND weather.date = now()::date",
this.w_mapper, cityId);
}
所以问题是当我使用两个时?我查询中的标记。 我怎样才能让它与 2 一起工作?标记???
最佳答案
问题可能出在这部分:
'? days'
问号位于文字字符串中,因此 sql 解析器无法识别它。 您可以尝试使用字符串连接运算符重写它,但我不能 100% 确定这种情况下的语法是否有效。
根据 this page on the postgres wiki您应该能够简单地省略字符串“days”,因为添加日期和整数会被解释为添加指定的天数。
BETWEEN now()::date AND now()::date + ?
关于Java Spring JDBC模板问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/5832497/