Catalyst-Resolve Logical Plan

2016-12-26 11:28:01   0  举报

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Catalyst-Resolve Logical Plan 是一种用于处理查询语句的优化技术，它通过将查询语句转换为逻辑执行计划来提高查询性能。这种技术主要应用于数据库管理系统中，以帮助系统更好地理解和执行复杂的查询操作。Catalyst-Resolve Logical Plan 通过对查询语句进行语法分析和语义分析，将其转换为一种易于处理的逻辑表示形式。然后，系统会根据这种逻辑表示形式生成一个优化后的逻辑执行计划，以提高查询的执行效率。这种方法可以有效地减少查询语句的执行时间，提高数据库系统的整体性能。

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大纲/内容

'sum('v)

16/12/26 13:18:48 DEBUG Analyzer$ResolveReferences: Resolving 'people.id to id#1L16/12/26 13:18:48 DEBUG Analyzer$ResolveReferences: Resolving 'score.id to id#8L16/12/26 13:18:48 DEBUG Analyzer$ResolveReferences: Resolving 'people.age to age#0L16/12/26 13:18:48 DEBUG Analyzer$ResolveReferences: Resolving 'score.id to id#8L16/12/26 13:18:48 DEBUG Analyzer$ResolveReferences: Resolving 'score.math_score to math_score#9L16/12/26 13:18:48 DEBUG Analyzer$ResolveReferences: Resolving 'score.english_score to english_score#7L16/12/26 13:18:48 DEBUG Analyzer$ResolveReferences: Resolving 'v to v#50L

UnresolvedRelation(score)

Filter

Project

Aggregate[sum(v#50L) AS sum(v)#57L]

UnresolvedRelation(people)

(id#1L = id#8L) && (age#0L cast(10 as bigint)))

Join

'people.id = 'score.id AND 'people.age 10

Catalog