我对django的内置注释模型进行了简单的查询,并使用heroku的postgreSQL数据库获取下面的错误:
DatabaseError: operator does not exist: integer = text LINE 1:
... INNER JOIN "django_comments" ON ("pi ns_pin"."id" = "django_...
^
HINT: No operator matches the given name and argument type(s).
You might need to add explicit type casts.
在谷歌搜索之后似乎这个错误在django之前已经被解决了很多次,但我仍然得到它(所有相关问题都在3 - 5年前关闭).我正在使用django 1.4版和最新版本的tastypie.
查询是在orm过滤器下进行的,并且与我的开发数据库(sqlite3)完美配合:
class MyResource(ModelResource):
comments = fields.ToManyField('my.api.api.CmntResource', 'comments', full=True, null=True)
def build_filters(self, filters=None):
if filters is None:
filters = {}
orm_filters = super(MyResource, self).build_filters(filters)
if 'cmnts' in filters:
orm_filters['comments__user__id__exact'] = filters['cmnts']
class CmntResource(ModelResource):
user = fields.ToOneField('my.api.api.UserResource', 'user', full=True) …我正在尝试使用EclipseLink在Glassfish中使用JPA编辑Postgresql中的表.当我插入一个实体时,它运行正常.但是,当我尝试编辑或删除同一个实体时,它会因以下错误而失败.任何的想法？
Caused by: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.0.1.v20100213-r6600): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: org.postgresql.util.PSQLException: ERROR: operator does not exist: integer = character varying
Hint: No operator matches the given name and argument type(s). You might need to add explicit type casts.
Position: 38
Error Code: 0
at org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:333)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.processExceptionForCommError(DatabaseAccessor.java:1422)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:799)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeNoSelect(DatabaseAccessor.java:867)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:587)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:530)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeCall(AbstractSession.java:914)
at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:205)
at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:191)
at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.deleteObject(DatasourceCallQueryMechanism.java:182)
at org.eclipse.persistence.internal.queries.StatementQueryMechanism.deleteObject(StatementQueryMechanism.java:101)
at org.eclipse.persistence.queries.DeleteObjectQuery.executeDatabaseQuery(DeleteObjectQuery.java:167)
at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:675)
at org.eclipse.persistence.queries.DatabaseQuery.executeInUnitOfWork(DatabaseQuery.java:589)
at org.eclipse.persistence.queries.ObjectLevelModifyQuery.executeInUnitOfWorkObjectLevelModifyQuery(ObjectLevelModifyQuery.java:109)
at org.eclipse.persistence.queries.DeleteObjectQuery.executeInUnitOfWorkObjectLevelModifyQuery(DeleteObjectQuery.java:112)
at org.eclipse.persistence.queries.ObjectLevelModifyQuery.executeInUnitOfWork(ObjectLevelModifyQuery.java:86) … 从 MySQL 切换到PostgreSQL 后，我发现我的 SQL 查询（spring 数据存储库界面中的 @Query）不再起作用。该问题是由作为bytea发送的空值引起的，我收到以下异常：
Caused by: org.postgresql.util.PSQLException: ERROR: operator does not exist: bigint = bytea
Hint: No operator matches the given name and argument type(s). You might need to add explicit type casts.
带有@Query 的存储库：
public interface WineRepository extends PagingAndSortingRepository<Wine, Long> {
@Query(value = "SELECT * FROM WINE w WHERE (?1 IS NULL OR w.id = ?1)", nativeQuery = true)
Wine simpleTest(Long id);
}
简单测试：
LOGGER.warn("test1: {}", wineRepository.simpleTest(1L)); //ok
LOGGER.warn("test2: …我需要解码一个 base64 字符串并获取一大块二进制文件。
Postgres 中是否有 SQL 函数可以简单地将 abytea转换为二进制字符串表示？
（例如“00010001010101010”。）
我在 Spring Boot 中有一个本机查询，如下所示：
@Query(value = "SELECT t.* FROM Transaction t WHERE " +
"t.datetime >= TO_TIMESTAMP(?1,'YYYY-MM-ddTHH:MI') " +
"AND t.datetime < TO_TIMESTAMP(?2,'YYYY-MM-ddTHH:MI') " +
"AND (t.location_1 = ?3 or ?3 is null) " +
"LIMIT ?4",
nativeQuery = true)
List<Transaction> findBySearchTerms(@Param("fromDateTime") String fromDateTime,
String toDateTime,
Integer location1,
Integer maxCount
);
对于location1，它可能为空。当我使用 location1 null 运行此查询时，它返回错误消息：org.postgresql.util.PSQLException: ERROR: operator does not exist: bigint = bytea
之后我尝试对参数 3 进行投射：
"AND (?3 is null or t.location_1 = cast(?3 as bigint)) " +
它还会导致错误：org.postgresql.util.PSQLException: ERROR: …
postgresql ×4
java ×3
binary-data ×1
bytea ×1
django ×1
eclipselink ×1
heroku ×1
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