榜单
服务器优惠
AI论文
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Known Incompatibility Issues with Third-Party Tools
Known Incompatibility Issues with Third-Party Tools General incompatibility SELECT CONNECTION_ID() returns a 64-bit integer in TiDB TiDB does not maintain Com_* counters TiDB d... -
Unsupported Items
Unsupported Items DataSource Interface Connection Interface Statement and PreparedStatement Interface ResultSet Interface JDBC 4.1 Unsupported Items DataSource Interface ... -
1 Conditions
1 Conditions Overview Trigger actions Service actions Discovery actions Autoregistration actions Internal event actions Type of calculation Actions disabled due to deleted o... -
IS NOT NULL
IS NOT NULL Description Syntax Examples IS NOT NULL Description The IS NOT NULL function tests whether a value is not NULL . If expression is NOT NULL , this functio... -
IS NOT NULL
IS NOT NULL Description Syntax Examples IS NOT NULL Description The IS NOT NULL function tests whether a value is not NULL . If expression is NOT NULL , this functio... -
1 Conditions
1 Conditions Overview Trigger actions Discovery actions Autoregistration actions Internal event actions Type of calculation Actions disabled due to deleted objects 1 Cond... -
统计信息调优
统计信息调优 统计信息调优介绍 实例分析1：未收集统计信息导致查询性能差 统计信息调优 统计信息调优介绍 openGauss是基于代价估算生成的最优执行计划。优化器需要根据analyze收集的统计信息行数估算和代价估算，因此统计信息对优化器行数估算和代价估算起着至关重要的作用。通过analyze收集全局统计信息，主要包括：pg_class表中... -
ISM Error Prevention
ISM error prevention rollover delete force_merge replica_count open read_only read_write close index_priority snapshot transition ISM error prevention Error preventio... -
ISM Error Prevention
ISM error prevention rollover delete force_merge replica_count open read_only read_write close index_priority snapshot transition ISM error prevention Error preventio... -
pwck 用来验证系统认证文件内容和格式的完整性
pwck 补充说明 语法 选项 参数 实例 pwck 用来验证系统认证文件内容和格式的完整性 补充说明 pwck命令 用来验证系统认证文件/etc/passwd 和/etc/shadow 的内容和格式的完整性。 语法 pwck (选项)(参数) 选项 - q ：仅报告错误信息； - s ：以用户 id 排序文件“/ e...