public static final String UPDATE_DOCUMENTS_WITH_TO_DELETE_FLAG_FOR_USER_SQL = "\n" +
"UPDATE document d \n" +
"SET d.indexed = :flagValue \n" +
"WHERE d.user_id = :userId \n" +
"AND d.to_delete = :toDelete";
public static final String UPDATE_DOCUMENTS_WITH_TO_DELETE_FLAG_FOR_USER_WITH_EXCEPTIONS_SQL = "\n" +
"UPDATE document d \n" +
"SET d.indexed = :flagValue \n" +
"WHERE d.user_id = :userId \n" +
"AND d.to_delete = :toDelete \n" +
"AND d.id NOT IN (:exceptForDocuments)";
public int markUserDocumentsToDeleteAsUnindexed(String userId,Collection<String> exceptForDocuments) {
Map<String,Object> params = Maps.newHashMap();
params.put("flagValue",false);
params.put("userId",userId);
params.put("toDelete",1);
params.put("exceptForDocuments",exceptForDocuments);
if ( exceptForDocuments.isEmpty() ) {
return jdbcTemplate.update(UPDATE_DOCUMENTS_WITH_TO_DELETE_FLAG_FOR_USER_SQL, params);
}
else {
return jdbcTemplate.update(UPDATE_DOCUMENTS_WITH_TO_DELETE_FLAG_FOR_USER_WITH_EXCEPTIONS_SQL,params);
}
}
有没有办法使用单个查询来执行两个更新?
因为实际使用UPDATE_DOCUMENTS_WITH_TO_DELETE_FLAG_FOR_USER_WITH_EXCEPTIONS_SQL
查询似乎对 H2 有效,但对 MySQL 无效。有什么想法可以避免这种查询重复吗?