libenchao commented on a change in pull request #10822:
[FLINK-15081][docs-zh]Translate "Concepts & Common API" page of Table…
URL: https://github.com/apache/flink/pull/10822#discussion_r382673794
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File path: docs/dev/table/common.zh.md
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@@ -1406,54 +1385,54 @@ val table: Table = tableEnv.fromDataStream(stream,
'name as 'myName)
{% top %}
-Query Optimization
+查询优化
------------------
<div class="codetabs" markdown="1">
<div data-lang="Old planner" markdown="1">
-Apache Flink leverages Apache Calcite to optimize and translate queries. The
optimization currently performed include projection and filter push-down,
subquery decorrelation, and other kinds of query rewriting. Old planner does
not yet optimize the order of joins, but executes them in the same order as
defined in the query (order of Tables in the `FROM` clause and/or order of join
predicates in the `WHERE` clause).
+Apache Flink 利用 Apache Calcite
来优化和解析查询。当前执行的优化包括投影和过滤器下推，子查询去相关以及其他类型的查询重写。原版计划程序尚未优化 join
的顺序，而是按照查询中定义的顺序执行它们（FROM 子句中的表顺序和/或 WHERE 子句中的 join 谓词顺序）。
Review comment:
how about “子查询消除”？
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