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d484d2f684
This now gives a clean RAT check with bin/check-rat-report.py, which is one way for the Impala community to check compliance with ASF rules on intellectual property. Change-Id: I2ad06435f84a65ba126759e42a18fdaf52cd7036 Reviewed-on: http://gerrit.cloudera.org:8080/5232 Reviewed-by: Jim Apple <jbapple-impala@apache.org> Tested-by: Impala Public Jenkins Reviewed-by: John Russell <jrussell@cloudera.com>
65 lines
2.3 KiB
XML
65 lines
2.3 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="real">
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<title>REAL Data Type</title>
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<titlealts audience="PDF"><navtitle>REAL</navtitle></titlealts>
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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="Impala Data Types"/>
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<data name="Category" value="SQL"/>
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<data name="Category" value="Data Analysts"/>
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<data name="Category" value="Developers"/>
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<data name="Category" value="Schemas"/>
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</metadata>
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</prolog>
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<conbody>
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<p>
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An alias for the <codeph>DOUBLE</codeph> data type. See <xref href="impala_double.xml#double"/> for details.
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</p>
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<p conref="../shared/impala_common.xml#common/example_blurb"/>
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<p>
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These examples show how you can use the type names <codeph>REAL</codeph> and <codeph>DOUBLE</codeph>
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interchangeably, and behind the scenes Impala treats them always as <codeph>DOUBLE</codeph>.
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</p>
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<codeblock>[localhost:21000] > create table r1 (x real);
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[localhost:21000] > describe r1;
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+------+--------+---------+
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| name | type | comment |
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+------+--------+---------+
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| x | double | |
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+------+--------+---------+
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[localhost:21000] > insert into r1 values (1.5), (cast (2.2 as double));
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[localhost:21000] > select cast (1e6 as real);
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+---------------------------+
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| cast(1000000.0 as double) |
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+---------------------------+
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| 1000000 |
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+---------------------------+</codeblock>
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</conbody>
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</concept>
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