Distributed database non-shard field querying method, system and device

The invention discloses a distributed database non-shard field querying method, system and device, and relates to the technical field of distributed databases. The querying method includes that a client queries index information of a non-shard field from a global index database; the client queries information of the non-shard field from a distributed database where the non-shard field is located if the index information is information of the distributed database where the non-shard field is located; or the client determines a distributed database where the non-shard field is located according to a shard primary key corresponding to the non-shard field if the index information is the shard primary key corresponding to the non-shard field, and queries information of the non-shard field from the distributed database where the non-shard field is located. In this way, the non-shard field can be rapidly and effectively queried. 本发明公开了种分布式数据库非分片字段的查询方法、系统和设备，涉及分布式数据库技术领域。客户端向全局索引库查询到非分片字段的索引信息；如果索引信息为非分片字段所在的分布式数据库的