There is a way to directly use JDK SPI in Dubbo, for example, org.apache.dubbo.common.extension.LoadingStrategy is placed in the META-INF/services/ path, but in most cases it uses its own implementation of JDK SPI. This optimization method can be called Dubbo SPI, which is the point to...
For example, if a hash aggregate operator is used in the first step of a query plan, full data of downstream operators is required to create a hash table for an aggregate operation. For common queries with filter conditions, data is calculated and returned in real time. In this scenario, ...
Join method – The method (e.g., hash, sort-merge, etc.) used to join tables with each other. Join type – The type of join (e.g., outer, anti, semi, etc.). Join order – The order in which the tables are joined to each other. Partition pruning – Are...
MaxCompute provides four task types: map, reduce, join, and local work. The first letter in a task name indicates the type of the task. For example, M2Stg1 is a map task. The digit that follows the first letter indicates the task ID. This ID is unique among all tasks that correspon...
Except that map lookup also easy to combine coprocessor's RuntimeStats in furture~? executor/update.go Outdated @@ -112,6 +114,12 @@ func (e *UpdateExec) canNotUpdate(handle types.Datum) bool { // Next implements the Executor Next interface. func (e *UpdateExec) Next(ctx context.Con...
Q1: Define the three types of data flow. Q2: What are the two principles of Protocol Layering? Q3: A sine wave is offset 1/4 cycle with respect to time 0. What is its phase in degrees and radians? Q4: How to describe a scatter plot?
~28 bits of entropy 228= 3 days at 1000 guesses/sec (Plausible attack on a weak remote web service. Yes, cracking a stolen hash is faster, but it's not what the average user should worry about.) Difficulty to guess: Easy [Cueball stands scratching his head trying to remember the pass...
the library cache based upon a hashed representation of that query. When looking for a statement in the library cache, we first apply a hashing algorithm to the statement and then we look for this hash value in the library cache. This access path will be used until the query is reparsed...
Join method – The method (e.g., hash, sort-merge, etc.) used to join tables with each other. Join type – The type of join (e.g., outer, anti, semi, etc.). Join order – The order in which the tables are joined to each other. Partition pruning – Are...
Join method – The method (e.g., hash, sort-merge, etc.) used to join tables with each other. Join type – The type of join (e.g., outer, anti, semi, etc.). Join order – The order in which the tables are joined to each other. Partition pruning – ...