24.1.30 Service Overview GaussDB Compatibility Description User Guide Developer Guide(Distributed) Database System Overview Database Security Database Quick Start Development and Design Proposal Application Development Guide Development Specifications Development Based on JDBC ...
The polling method for a filter, which returns an array of logs which occurred since last poll. Call eth_newFilter, eth_newBlockFilter, or eth_newPendingTransactionFilter to create a filter. It consumes 20 CUs. Parameter Description Parameter Type Filter ID String The string of the filter ID...
鲲鹏数学库kml(kunpeng math library)是华为提供的基于鲲鹏平台优化的高性能数学函数库,主要完成标量,矢量,矩阵上的数学计算,包括基本的四则运算、三角函数、对数函数、指数函数、线性代数计算等。本文档提供了kml的安装指南、详细接口定义与示例代码,旨在帮助用户快速熟悉kml的使用。 数学库概述 kml提供了基于鲲鹏平台...
基于JDBC开发 基于ODBC开发 基于libpq开发 基于Psycopg开发 基于ecpg开发 基于Go驱动开发 Go驱动环境搭建 开发流程 连接数据库 连接数据库(以SSL方式) Go接口参考 sql.Open接口 type DB type Stmt type Tx type Rows type Row type ColumnType type Result 兼容性参考 调试 SQL调优指南 SQL参考 最佳实践 用户自定义...
In actual application scenarios, the data source stores the data in the local disks to ensure the error tolerance of the data. However, the calculation results of the Streaming are stored in the memory, and the data source may become the largest bottleneck of the streaming system. ...
NOTE: This section applies to the scenario where the input data source is Kafka. Procedure A simple streaming processing system consists of a data source, a receiver, and a processor. The data source is Kafka, the receiver is the Kafka data source receiver of Streaming, and the processor is...
过滤器必须通过调用eth_newFilter、eth_newBlockFilter、eth_newPendingTransactionFilter来创建。该API所消耗的计算单元为20。 参数说明 参数 类型 过滤器ID String 表示过滤器 ID 的字符串。 返回值 log object array:(数组)日志对象数组,如果自上次轮询以来没有任何更改,则为空数组。 对于使用eth_newBlockFilter...