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8377b9949c
For this change to land in master, the audience="hidden" code review needs to be completed first. Otherwise, the doc build would still work but the audience="hidden" content would be visible rather than hidden as desired. Some work happening in parallel might introduce additional instances of audience="Cloudera". I suggest addressing those in a followup CR so this global change can land quickly. Since the changes apply across so many different files, but are so narrow in scope, I suggest that the way to validate (check that no extraneous changes were introduced accidentally) is to diff just the changed lines: git diff -U0 HEAD^ HEAD In patch set 2, I updated other topics marked audience="Cloudera" by CRs that were pushed in the meantime. Change-Id: Ic93d89da77e1f51bbf548a522d98d0c4e2fb31c8 Reviewed-on: http://gerrit.cloudera.org:8080/5613 Reviewed-by: John Russell <jrussell@cloudera.com> Tested-by: Impala Public Jenkins
72 lines
2.2 KiB
XML
72 lines
2.2 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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<!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
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<concept id="comments">
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<title>Comments</title>
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<prolog>
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<metadata>
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<data name="Category" value="Impala"/>
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<data name="Category" value="SQL"/>
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<data name="Category" value="Developers"/>
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<data name="Category" value="Data Analysts"/>
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</metadata>
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</prolog>
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<conbody>
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<p>
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<indexterm audience="hidden">comments (SQL)</indexterm>
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Impala supports the familiar styles of SQL comments:
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</p>
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<ul>
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<li>
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All text from a <codeph>--</codeph> sequence to the end of the line is considered a comment and ignored.
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This type of comment can occur on a single line by itself, or after all or part of a statement.
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</li>
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<li>
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All text from a <codeph>/*</codeph> sequence to the next <codeph>*/</codeph> sequence is considered a
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comment and ignored. This type of comment can stretch over multiple lines. This type of comment can occur
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on one or more lines by itself, in the middle of a statement, or before or after a statement.
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</li>
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</ul>
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<p>
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For example:
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</p>
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<codeblock>-- This line is a comment about a table.
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create table ...;
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/*
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This is a multi-line comment about a query.
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*/
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select ...;
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select * from t /* This is an embedded comment about a query. */ where ...;
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select * from t -- This is a trailing comment within a multi-line command.
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where ...;
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</codeblock>
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</conbody>
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</concept>
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