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e8e637873c
add the new query option UTF8_MODE topic update impala_string topic as requested in the first review create a new topic for UTF_8 mode under SQL ref discuss the new query option Change-Id: Ifac5812a3f5e105a73ac87c1ae5fce69a776fb92 Reviewed-on: http://gerrit.cloudera.org:8080/18424 Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Reviewed-by: Quanlong Huang <huangquanlong@gmail.com>
55 lines
2.2 KiB
XML
55 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="utf8_mode">
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<title>UTF8_MODE Query Option</title>
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<titlealts audience="PDF"><navtitle>UTF8_MODE</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 Query Options"/>
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<data name="Category" value="Troubleshooting"/>
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<data name="Category" value="Querying"/>
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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">UTF8_MODE Query Option</indexterm> UTF-8 support allows string
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functions to recognize the UTF-8 characters, thus processing strings in a compatible way as other
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engines.</p>
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<p>You can use the new query option, UTF8_MODE, to turn on/off the UTF-8 aware behavior. The query
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option can be set globally, or at per session level. Only queries with UTF8_MODE=true will have
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UTF-8 aware behaviors. If the query option UTF8_MODE is turned on globally, existing queries that
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depend on the original binary behavior need to be explicitly set to UTF8_MODE=false.</p>
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<p><b>Type:</b>BOOLEAN</p>
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<p><b>Default:</b>FALSE</p>
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<p><b>Added in:</b>Impala 4.1</p>
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<p conref="../shared/impala_common.xml#common/related_info"/>
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<p>
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<xref href="impala_string.xml"/>,
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<xref href="impala_utf_8.xml"/>
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</p>
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</conbody>
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</concept> |