AngersZhuuuu commented on a change in pull request #34821: URL: https://github.com/apache/spark/pull/34821#discussion_r764584923
########## File path: docs/sql-distributed-sql-engine-spark-sql-cli.md ########## @@ -0,0 +1,185 @@ +--- +layout: global +title: Spark SQL CLI +displayTitle: Spark SQL CLI +license: | + Licensed to the Apache Software Foundation (ASF) under one or more + contributor license agreements. See the NOTICE file distributed with + this work for additional information regarding copyright ownership. + The ASF licenses this file to You under the Apache License, Version 2.0 + (the "License"); you may not use this file except in compliance with + the License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +--- + +* Table of contents +{:toc} + + +The Spark SQL CLI is a convenient tool to run the Hive metastore service in local mode and execute +queries input from the command line. Note that the Spark SQL CLI cannot talk to the Thrift JDBC server. + +To start the Spark SQL CLI, run the following in the Spark directory: + + ./bin/spark-sql + +Configuration of Hive is done by placing your `hive-site.xml`, `core-site.xml` and `hdfs-site.xml` files in `conf/`. + +## Spark SQL Command Line Options + +You may run `./bin/spark-sql --help` for a complete list of all available options. + + CLI options: + -d,--define <key=value> Variable substitution to apply to Hive + commands. e.g. -d A=B or --define A=B + --database <databasename> Specify the database to use + -e <quoted-query-string> SQL from command line + -f <filename> SQL from files + -H,--help Print help information + --hiveconf <property=value> Use value for given property + --hivevar <key=value> Variable substitution to apply to Hive + commands. e.g. --hivevar A=B + -i <filename> Initialization SQL file + -S,--silent Silent mode in interactive shell + -v,--verbose Verbose mode (echo executed SQL to the + console) + +## The hiverc File + +The Spark SQL CLI when invoked without the `-i` option will attempt to load `$HIVE_HOME/bin/.hiverc` and `$HOME/.hiverc` as initialization files. + +## Supported comment types + +<table class="table"> +<tr><th>Comment</th><th>Example</th></tr> +<tr> + <td>simple comment</td> + <td> + <code> + -- This is a simple comment. + <br> + SELECT 1; + </code> + </td> +</tr> +<tr> + <td>bracketed comment</td> + <td> + <code> + /* This is a bracketed comment. */ + <br> + SELECT 1; + </code> + </td> +</tr> +<tr> + <td>nested bracketed comment</td> + <td> + <code> + /* This is a /* nested bracketed comment*/ .*/ + <br> + SELECT 1; + </code> + </td> +</tr> +</table> + +## 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. 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. +4. If `;` in a simple comment + ```sql + -- 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, + ```sql + /* This is a comment contains ';'. */ + SELECT 1; + ``` + it will not terminate commands. If `;` in a bracketed command and in the end of line, + ```sql + /* This is a comment contains ; + */ SELECT 1; + ``` + it will terminate commands into `/* This is a comment contains ` and `*/ SELECT 1`. + + +<table class="table"> +<tr><th>Command</th><th>Description</th></tr> +<tr> + <td><code>quit</code> <code>exit</code></td> + <td>Use <code>quit</code> or <code>exit</code> to leave the interactive shell.</td> +</tr> +<tr> + <td><code>!<command></code></td> + <td>Executes a shell command from the Spark SQL CLI shell.</td> +</tr> +<tr> + <td><code>dfs <dfs command></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> +</tr> +<tr> + <td><code><query string></code></td> + <td>Executes a Spark SQL query and prints results to standard output.</td> +</tr> +<tr> + <td><code>source <filepath></code></td> + <td>Executes a script file inside the CLI.</td> +</tr> +</table> + +## Examples + +Example of running a query from the command line Review comment: Done -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
