maropu commented on a change in pull request #26970: [SPARK-28825][SQL][DOC]
Documentation for Explain Command
URL: https://github.com/apache/spark/pull/26970#discussion_r360622819
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File path: docs/sql-ref-syntax-qry-explain.md
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@@ -19,4 +19,157 @@ license: |
limitations under the License.
---
-**This page is under construction**
+### Description
+
+The `EXPLAIN` statement provides the execution plan for the statement.
+By default, `EXPLAIN` provides information about the physical plan.
+`EXPLAIN` does not support 'DESCRIBE TABLE' statement.
+
+
+### Syntax
+{% highlight sql %}
+EXPLAIN [EXTENDED | CODEGEN] statement
Review comment:
We have more modes for explains:
https://github.com/apache/spark/blob/c72f88b0ba20727e831ba9755d9628d0347ee3cb/sql/core/src/main/scala/org/apache/spark/sql/execution/command/commands.scala#L134
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