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PREPARE 功能描述 创建一个预备语句。 预备语句是服务端的对象,可以用于优化性能。在执行PREPARE语句的时候,指定的查询被解析、分析、重写。当随后发出EXECUTE语句的时候,预备语句被规划和执行。这种设计避免了重复解析、分析工作。PREPARE语句创建后在整个数据库会
分词器 全文检索功能还可以做更多事情:忽略索引某个词(停用词),处理同义词和使用复杂解析,例如,不仅基于空格的解析。这些功能通过文本搜索分词器控制。GaussDB(DWS)支持多语言的预定义的分词器,并且可以创建分词器(gsql的\dF命令显示了所有可用分词器)。 在安装期间选择
PREPARE 功能描述 创建一个预备语句。 预备语句是服务端的对象,可以用于优化性能。在执行PREPARE语句的时候,指定的查询被解析、分析、重写。当随后发出EXECUTE语句的时候,预备语句被规划和执行。这种设计避免了重复解析、分析工作。PREPARE语句创建后在整个数据库会
great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted
great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted
great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted
great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted
great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted
great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted
great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted
great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted
from lineitem where l_orderkey = o_orderkey and l_commitdate < l_receiptdate ) group by o_orderpriority order by o_orderpriority; 查询PLAN_TABLE。
supportsLikeEscapeClause() boolean Yes supportsMultipleResultSets() boolean Yes supportsMultipleTransactions() boolean Yes supportsNonNullableColumns()
0版本开始,为了提升内存资源利用率,增大了单机器单DN部署形态的max_process_memory初始值,但当出现集群状态不均衡的情况下,两个主DN节点会同时在一个机器上,如果仍然使用max_process_memory初始值,机器可能出现OOM报错的情况。为此,8.2.0版本开
orc”。这里的“n”是从0开始按照自然数0、1、2、3递增。 对于来自不同集群或不同数据库的数据,建议用户可以将数据导出到不同路径下。ORC格式文件大小最大为128M,Stripe大小最大为64M。 导出完成后会生成_SUCCESS标记文件。 父主题: 导出ORC数据到MRS
regexp_match_parameter text 脱敏类型为regexp时,正则控制参数。(保留字段,无实际意义) column_description text 脱敏列描述信息。 function_expr pg_node_tree 脱敏函数的内部表现形式。 inherited bool
池、提交时间、阻塞时间(ms)、执行时间(ms)、CPU时间(ms)、CPU时间倾斜(%)、平均下盘量(MB)、查询语句、接入CN、客户端IP、查询状态、完成时间、预估总执行时间(ms)、取消原因。 打开隐藏系统查询按钮可隐藏系统历史查询。 历史查询监控详情 单击指定历史查询监控
from lineitem where l_orderkey = o_orderkey and l_commitdate < l_receiptdate ) group by o_orderpriority order by o_orderpriority; 查询PLAN_TABLE。
great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted
great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted