无论在 OLAP 还是 OLTP 领域,Join 都是业务常会涉及到且优化规则比较复杂的 SQL 语句。对于离线计算而言,经过数据库领域多年的积累,Join 语义以及实现已经十分成熟,然而对于近年来刚兴起的 Streaming SQL 来说 Join 却处于刚起步的状态。 其中最为关键的问题在于 Join 的实现依赖于缓存整个数据集,而 Streaming SQL...
This technique has the potential to enhance the effectiveness of smart city initiatives by enabling better data management and analysis. The centralized storage and analysis of data can provide insights that can inform decision-making and lead to improved services for residents. Additionally, the use ...
Investigators in the biological sciences continue to exploit laboratory automation methods and have dramatically increased the rates at which they can generate data. In many environments, the methods themselves also evolve in a rapid and fluid manner. These observations point to the importance of robust...
particularly as most deployments now occur within cloud environments. While modern DBMS are designed as general-purpose systems to accommodate a wide range of use cases, including analytical and transactional workloads (such as OLAP and OLTP), this poses a tremendous challenge for the query execution...
HTAP:It implements both OLTP and OLAP in one set of engines. 2. The Implementation Principle of Flink CDC OceanBase Connector The current mainstream CDC mainly relies on the logs of the database. After capturing the incremental logs of the database, it is necessary to ensure their ord...
Irregular problems: The distribution of edges and vertices usually does not constitute uniform graphs that form embarrassingly parallel problems, whose benefits from simple parallelism are easier to achieve [58]. We note that after defining the unit of computation in a graph, care needs to be taken...
A good understanding of the structure of a full-text index helps one appreciate how the full-text engine works. Let's take a look at a basic example of a full-text index rendered in tabular form: **Note **Actual full-text indexes contain information in addition to what is presented in...
Data Warehouse techniques: the OLAP engine for data exploration While a normalized structure (i.e, one based on the Entity-Relation model) may be preferred for a correct management of the database in terms of data integrity and reliability, the adoption of query-oriented models that reflect the...
The growth of the Internet has enabled the popularity of open online learning platforms to increase over the years. This has led to the inception of Massive Open Online Courses (MOOCs) that globally enrol millions of people. Such courses operate under th
20160147814In-Memory Database System Providing Lockless Read and Write Operations for OLAP and OLTP Transactions2016-05-26Goel et al. 20160147813DISTRIBUTED TRANSACTION COMMIT PROTOCOL2016-05-26Lee et al. 20160147812Garbage Collection of Versions Driving the Garbage Collection of Multi-Version Concurrency ...