[SPARK-37558][DOC] Improve spark sql cli document by AngersZhuuuu · Pull Request #34821 · apache/spark

AngersZhuuuu · 2021-12-06T12:19:57Z

What changes were proposed in this pull request?

Current Spark SQL CLI doc just show simple usage. In this pr we add a detail doc for spark sql cli.

Why are the changes needed?

Make doc about Spark SQL CLI more clear. help user to use this command line tool.

Does this PR introduce any user-facing change?

No

How was this patch tested?

SparkQA · 2021-12-06T13:01:07Z

Test build #145954 has finished for PR 34821 at commit 01848dc.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

SparkQA · 2021-12-06T13:30:03Z

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SparkQA · 2021-12-07T03:03:55Z

Test build #145970 has finished for PR 34821 at commit 7a9ecbf.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

AngersZhuuuu · 2021-12-07T03:13:08Z

ping @cloud-fan

SparkQA · 2021-12-07T03:36:05Z

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SparkQA · 2021-12-07T03:59:59Z

Test build #145972 has finished for PR 34821 at commit a0218f8.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

cloud-fan · 2021-12-07T04:31:45Z

+## Spark SQL CLI Interactive Shell Commands
+
+When `./bin/spark-sql` is run without either the `-e` or `-f` option, it enters interactive shell mode.
+Use `;` (semicolon) to terminate commands, but user can escape `;` by `\\;`. Comments in scripts can be specified using the `--` prefix.


What if ; is not the end of the line? does it still terminate commands?

I think we should explain more about ;
what if it's inside a comment? SELECT /* xxx; */ 1;
is ; the only way to terminate commands? what if I type SELECT 1 and then press enter?
can we put multiple commands in a single line? SELECT 1; SELECT 2;

How about current?

SparkQA · 2021-12-07T04:32:25Z

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SparkQA · 2021-12-07T04:34:03Z

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SparkQA · 2021-12-07T05:32:50Z

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SparkQA · 2021-12-07T06:00:08Z

Test build #145977 has finished for PR 34821 at commit cea5be4.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

cloud-fan · 2021-12-07T06:10:08Z

+Use `;` (semicolon) to terminate commands. Notice:
+1. CLI use `;` to terminate commands only when it's at the end of line and it's not escaped by `\\;`.
+2. `;` is the only way to terminate commands, if user type `SELECT 1` and press enter, console will just wait for input.
+3. If user type multiple commands in one line like `SELECT 1; SELECT 2;`, commands `SELECT 1` and `SELECT 2` will be executed separatly.


and CLI only shows the result of the last command?

and CLI only shows the result of the last command?
No, both result.
spark-sql> select 1; select 2; 1 Time taken: 3.819 seconds, Fetched 1 row(s) 2 Time taken: 0.077 seconds, Fetched 1 row(s)

If the user types multiple commands in one line like SELECT 1; SELECT 2;, then commands SELECT 1 and SELECT 2 will be executed separately.

cloud-fan · 2021-12-07T06:11:05Z

+ /* This is a comment contains ;
+ */ SELECT 1;
+ ```
+ it will terminate commands into `/* This is a comment contains ` and `*/ SELECT 1`.


and we hit failures when executing /* This is a comment contains

spark-sql> /* This is a comment contains ; Error in query: Unclosed bracketed comment(line 1, pos 0) == SQL == /* This is a comment contains ; ^^^ spark-sql> */ SELECT 1; Error in query: extraneous input '*/' expecting {'(', 'ADD', 'ALTER', 'ANALYZE', 'CACHE', 'CLEAR', 'COMMENT', 'COMMIT', 'CREATE', 'DELETE', 'DESC', 'DESCRIBE', 'DFS', 'DROP', 'EXPLAIN', 'EXPORT', 'FROM', 'GRANT', 'IMPORT', 'INSERT', 'LIST', 'LOAD', 'LOCK', 'MAP', 'MERGE', 'MSCK', 'REDUCE', 'REFRESH', 'REPLACE', 'RESET', 'REVOKE', 'ROLLBACK', 'SELECT', 'SET', 'SHOW', 'START', 'TABLE', 'TRUNCATE', 'UNCACHE', 'UNLOCK', 'UPDATE', 'USE', 'VALUES', 'WITH'}(line 1, pos 5) == SQL == */ SELECT 1 -----^^^ spark-sql>

SparkQA · 2021-12-07T06:38:46Z

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AngersZhuuuu · 2021-12-08T02:51:54Z

Any more suggestion?

srowen · 2021-12-08T03:23:47Z

+ -- This is a comment;
+ SELECT 1;
+ ```
+ This comment line will just be ignored. If `;` in a bracketed command and not at the end of line,


then this comment line will be ignored. If ; appears in a bracketed command
(and similarly for the other lines below)

srowen · 2021-12-08T03:25:07Z

+</tr>
+<tr>
+ <td><code>dfs &lt;dfs command&gt;</code></td>
+ <td>Executes a <a href="https://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-hdfs/HDFSCommands.html#dfs">dfs command</a> from the Hive shell.</td>


Is this only for executing commands vs HDFS or would it work on other distributed storage?
We should say HDFS if it's HDFS.
Also, not "Hive shell" here right?

Done, how about current?

SparkQA · 2021-12-08T07:10:49Z

Test build #146000 has finished for PR 34821 at commit 36ce29f.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

SparkQA · 2021-12-08T07:43:34Z

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AngersZhuuuu · 2021-12-14T02:48:10Z

Error in loadNamespace(x) : there is no package called ‘pkgdown’
Calls: loadNamespace -> withRestarts -> withOneRestart -> doWithOneRestart
Execution halted
Can you rebase this PR to pass Github Actions? It checks the documentation build.

Done

SparkQA · 2021-12-14T03:31:51Z

Test build #146158 has finished for PR 34821 at commit d9f150c.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

SparkQA · 2021-12-14T04:01:03Z

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cloud-fan · 2021-12-14T15:27:39Z

+## Path interpretation
+
+Spark SQL CLI supports running SQL from initialization script file(`-i`) or normal SQL file(`-f`), If path url don't have a schema component, the path will be handled as local file.
+For example: `/path/to/spark-sql-cli.sql` equals to `file:///path/to/spark-sql-cli.sql`.


let's also mention that people can use Hadoop supported filesystem such as s3://...

cloud-fan

LGTM except for a few minor comments

SparkQA · 2021-12-14T15:40:51Z

Test build #146189 has finished for PR 34821 at commit 453f260.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

SparkQA · 2021-12-14T16:15:39Z

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SparkQA · 2021-12-14T16:53:29Z

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Co-authored-by: Wenchen Fan <cloud0fan@gmail.com>

SparkQA · 2021-12-15T06:48:06Z

Test build #146220 has finished for PR 34821 at commit d4f6778.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

SparkQA · 2021-12-15T07:18:04Z

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SparkQA · 2021-12-15T07:37:21Z

Test build #146223 has finished for PR 34821 at commit 2b6f130.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

AngersZhuuuu · 2021-12-15T07:45:32Z

LGTM except for a few minor comments

Scrrenshot updated in pr desc

SparkQA · 2021-12-15T08:06:48Z

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SparkQA · 2021-12-15T09:34:46Z

Test build #146227 has finished for PR 34821 at commit 147d8b0.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

SparkQA · 2021-12-15T10:13:36Z

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cloud-fan · 2021-12-15T14:28:28Z

thanks, merging to master!

[SPARK-37558][DOC] Improve spark sql cli document
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AngersZhuuuu changed the title ~~[WIP][SPARK-37558][DOC] Improve spark sql cli document~~[SPARK-37558][DOC] Improve spark sql cli documentDec 7, 2021

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AngersZhuuuu added 2 commits December 8, 2021 14:28

Merge branch 'master' into SPARK-37558
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AngersZhuuuu added 2 commits December 14, 2021 10:45

Merge branch 'master' into SPARK-37558
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AngersZhuuuuand others added 2 commits December 15, 2021 14:31

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