thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-11-28 18:42:26 +00:00
Code Issues Packages Projects Releases Wiki Activity

Update architecture.md

Browse Source
This commit is contained in:
Alexey Milovidov 2024-07-13 18:46:24 +02:00 committed by Nikita Mikhaylov
parent 62d5e83f25
commit aa66203f17
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
docs/en/development/architecture.md
View File

@ -118,7 +118,7 @@ And the result of interpreting the `INSERT SELECT` query is a "completed" `Query
`InterpreterSelectQuery` uses `ExpressionAnalyzer` and `ExpressionActions` machinery for query analysis and transformations. This is where most rule-based query optimizations are performed. `ExpressionAnalyzer` is quite messy and should be rewritten: various query transformations and optimizations should be extracted into separate classes to allow for modular transformations of the query.
To address problems that exist in interpreters, a new `InterpreterSelectQueryAnalyzer` has been developed. IThis is a new version of the `Interpreter Select Query`, which does not use the `Expression Analyzer` and introduces an additional layer of abstraction between `AST` and `QueryPipeline`, called `QueryTree'. It is fully ready for use in production, but just in case it can be turned off by setting the value of the `enable_analyzer` setting to `false`.
To address problems that exist in interpreters, a new `InterpreterSelectQueryAnalyzer` has been developed. This is a new version of the `InterpreterSelectQuery`, which does not use the `ExpressionAnalyzer` and introduces an additional layer of abstraction between `AST` and `QueryPipeline`, called `QueryTree'. It is fully ready for use in production, but just in case it can be turned off by setting the value of the `enable_analyzer` setting to `false`.
## Functions {#functions}