mirror of
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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>
853 lines
14 KiB
XML
853 lines
14 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="glossary">
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<title>Impala Glossary</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="Administrators"/>
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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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<section id="glos_ddl">
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<title>DDL</title>
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<p>
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A category of SQL statements involving administrative or metadata-related operations. Many of these
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statements start with the keywords <codeph>CREATE</codeph>, <codeph>ALTER</codeph>, or
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<codeph>DROP</codeph>. Contrast with DML.
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</p>
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</section>
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<section id="glos_dml">
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<title>DML</title>
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<p>
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A category of SQL statements that modify table data. Impala has a limited set of DML statements, primarily
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the <codeph>INSERT</codeph> statement. Contrast with DDL.
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</p>
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</section>
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<section id="glos_catalog">
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<title>catalog</title>
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<p></p>
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</section>
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<section id="glos_catalogd">
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<title>catalogd</title>
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<p>
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A daemon.
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</p>
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</section>
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<section id="glos_impalad">
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<title>impalad</title>
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<p>
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A daemon.
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</p>
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</section>
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<section id="glos_statestored">
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<title>statestored</title>
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<p>
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A daemon.
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</p>
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</section>
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<section id="glos_statestore">
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<title>statestore</title>
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<p></p>
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</section>
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<section id="glos_metastore">
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<title>metastore</title>
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<p></p>
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</section>
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<section id="glos_table">
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<title>table</title>
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<p></p>
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</section>
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<section id="glos_database">
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<title>database</title>
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<p></p>
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</section>
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<section id="glos_hive">
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<title>Hive</title>
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<p>
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Its full trademarked name is Apache Hive.
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</p>
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</section>
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<section id="glos_hbase">
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<title>HBase</title>
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<p>
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Its full trademarked name is Apache HBase.
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</p>
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</section>
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<section id="glos_coordinator_node">
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<title>coordinator node</title>
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<p></p>
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</section>
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<section id="glos_sql">
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<title>SQL</title>
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<p>
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An acronym for Structured Query Language, the industry standard language for database operations.
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Implemented by components such as Impala and Hive.
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</p>
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</section>
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<section id="glos_avro">
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<title>Avro</title>
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<p>
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A file format.
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</p>
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</section>
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<section id="glos_text">
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<title>text</title>
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<p>
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A file format.
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</p>
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</section>
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<section id="glos_hdfs">
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<title>HDFS</title>
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<p></p>
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</section>
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<section id="glos_block">
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<title>block</title>
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<p></p>
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</section>
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<section id="glos_parquet">
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<title>Parquet</title>
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<p>
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A file format.
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</p>
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</section>
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<section id="glos_rcfile">
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<title>RCFile</title>
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<p>
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A file format.
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</p>
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</section>
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<section id="glos_sequencefile">
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<title>SequenceFile</title>
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<p>
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A file format.
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</p>
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</section>
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<section id="glos_snappy">
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<title>Snappy</title>
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<p></p>
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</section>
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<section id="glos_file_format">
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<title>file format</title>
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<p></p>
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</section>
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<section id="glos_compression">
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<title>compression</title>
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<p></p>
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</section>
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<section id="glos_codec">
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<title>codec</title>
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<p></p>
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</section>
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<section id="glos_lzo">
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<title>LZO</title>
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<p>
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A compression codec.
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</p>
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</section>
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<section id="glos_gzip">
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<title>gzip</title>
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<p>
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A compression codec.
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</p>
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</section>
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<section id="glos_bzip2">
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<title>BZip2</title>
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<p>
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A compression codec.
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</p>
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</section>
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<section id="glos_sentry">
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<title/>
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<p></p>
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</section>
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<section id="glos_authorization">
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<title>authorization</title>
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<p></p>
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</section>
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<section id="glos_authentication">
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<title>authentication</title>
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<p></p>
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</section>
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<section id="glos_delegation">
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<title>delegation</title>
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<p></p>
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</section>
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<section id="glos_skew">
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<title>skew</title>
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<p></p>
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</section>
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<section id="glos_profile">
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<title>profile</title>
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<p></p>
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</section>
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<section id="glos_query">
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<title>query</title>
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<p></p>
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</section>
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<section id="glos_external_table">
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<title>external table</title>
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<p></p>
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</section>
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<section id="glos_internal_table">
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<title>internal table</title>
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<p></p>
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</section>
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<section id="glos_view">
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<title>view</title>
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<p></p>
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</section>
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<section id="glos_function">
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<title>function</title>
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<p>
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In Impala, a kind of database object that performs customized processing or business logic. The kinds of
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functions include built-in functions, UDFs, and UDAs.
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</p>
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</section>
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<section id="glos_udf">
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<title>UDF</title>
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<p>
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Acronym for user-defined function. In Impala, a function that you write in C++ or Java. A UDF (as opposed
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to a UDA) returns a single scalar value for each row evaluated in the result set. On occasion, UDF is used
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in a broad context to include all kinds of user-written functions, including UDAs.
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</p>
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</section>
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<section id="glos_uda">
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<title>UDA</title>
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<p></p>
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</section>
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<section id="glos_aggregate_function">
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<title>aggregate function</title>
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<p></p>
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</section>
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<section id="glos_built_in_function">
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<title>built-in function</title>
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<p></p>
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</section>
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<section id="glos_analytic_function">
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<title>analytic function</title>
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<p></p>
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</section>
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<section id="glos_admission_control">
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<title>admission control</title>
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<p></p>
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</section>
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<section id="glos_llama">
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<title>llama</title>
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<p></p>
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</section>
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<section id="glos_impala">
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<title>Impala</title>
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<p></p>
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</section>
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<section id="glos_table_statistics">
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<title>table statistics</title>
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<p></p>
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</section>
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<section id="glos_column_statistics">
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<title>column statistics</title>
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<p></p>
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</section>
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<section id="glos_statistics">
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<title>statistics</title>
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<p></p>
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</section>
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<section id="glos_incremental_statistics">
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<title>incremental statistics</title>
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<p></p>
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</section>
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<section id="glos_hdfs_caching">
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<title>HDFS caching</title>
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<p></p>
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</section>
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<section id="glos_join_query">
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<title>join query</title>
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<p></p>
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</section>
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<section id="glos_straight_join">
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<title>straight join</title>
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<p></p>
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</section>
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<section id="glos_inner_join">
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<title>inner join</title>
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<p></p>
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</section>
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<section id="glos_outer_join">
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<title>outer join</title>
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<p></p>
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</section>
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<section id="glos_left_join">
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<title>left join</title>
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<p></p>
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</section>
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<section id="glos_right_join">
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<title>right join</title>
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<p></p>
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</section>
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<section id="glos_equijoin">
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<title>equijoin</title>
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<p></p>
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</section>
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<section id="glos_antijoin">
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<title>antijoin</title>
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<p></p>
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</section>
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<section id="glos_semijoin">
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<title>semijoin</title>
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<p></p>
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</section>
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<section id="glos_cross_join">
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<title>cross join</title>
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<p></p>
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</section>
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<section id="glos_hint">
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<title>hint</title>
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<p></p>
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</section>
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<section id="glos_distinct">
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<title>distinct</title>
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<p></p>
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</section>
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<section id="glos_impala_shell">
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<title>impala-shell</title>
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<p></p>
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</section>
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<section id="glos_odbc">
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<title>ODBC</title>
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<p></p>
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</section>
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<section id="glos_jdbc">
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<title>JDBC</title>
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<p></p>
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</section>
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<section id="glos_data_types">
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<title>data types</title>
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<p></p>
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</section>
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<section id="glos_performance">
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<title>performance</title>
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<p></p>
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</section>
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<section id="glos_scalability">
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<title>scalability</title>
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<p></p>
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</section>
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<section id="glos_hue">
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<title>Hue</title>
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<p></p>
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</section>
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<section id="glos_partition">
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<title>partition</title>
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<p></p>
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</section>
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<section id="glos_partitioning">
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<title>partitioning</title>
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<p></p>
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</section>
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<section id="glos_partitioned_table">
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<title>partitioned table</title>
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<p></p>
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</section>
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<section id="glos_hdfs_trashcan">
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<title>HDFS trashcan</title>
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<p></p>
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</section>
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<section id="glos_explain_plan">
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<title>EXPLAIN plan</title>
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<p></p>
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</section>
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<section id="glos_summary">
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<title>summary</title>
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<p></p>
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</section>
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<section id="glos_executive_summary">
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<title>executive summary</title>
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<p></p>
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</section>
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<section id="glos_alias">
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<title>alias</title>
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<p></p>
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</section>
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<section id="glos_identifier">
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<title>identifier</title>
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<p></p>
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</section>
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<section id="glos_query_option">
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<title>query option</title>
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<p></p>
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</section>
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<section id="glos_daemon">
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<title>daemon</title>
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<p>
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The daemons that make up the Impala service are <cmdname>impalad</cmdname>, <cmdname>statestored</cmdname>,
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and <cmdname>catalogd</cmdname>.
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</p>
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</section>
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<section id="impala_service">
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<title>Impala service</title>
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<p></p>
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</section>
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<section id="glos_session">
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<title>session</title>
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<p></p>
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</section>
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<section id="glos_schema">
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<title>schema</title>
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<p></p>
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</section>
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<section id="glos_schema_evolution">
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<title>schema evolution</title>
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<p></p>
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</section>
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<section id="glos_literal">
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<title>literal</title>
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<p></p>
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</section>
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<section id="glos_string">
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<title>string</title>
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<p>
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String values are represented in Impala by the data types <codeph>STRING</codeph>,
|
|
<codeph>VARCHAR</codeph>, and <codeph>CHAR</codeph>.
|
|
</p>
|
|
</section>
|
|
|
|
<section id="glos_number">
|
|
|
|
<title>number</title>
|
|
|
|
<p>
|
|
Numeric values are represented in Impala by the data types <codeph>INT</codeph>, <codeph>BIGINT</codeph>,
|
|
<codeph>SMALLINT</codeph>, <codeph>TINYINT</codeph>, <codeph>DECIMAL</codeph>, <codeph>DOUBLE</codeph>, and
|
|
<codeph>FLOAT</codeph>.
|
|
</p>
|
|
</section>
|
|
|
|
<section id="glos_date_time">
|
|
|
|
<title>date/time</title>
|
|
|
|
<p>
|
|
Date and time values are represented in Impala by the <codeph>TIMESTAMP</codeph> data type. Sometimes, for
|
|
convenience or as part of a partitioning plan, dates are represented as formatted <codeph>STRING</codeph>
|
|
columns or as separate integer columns for year, month, and day.
|
|
</p>
|
|
</section>
|
|
|
|
<section id="glos_cancel">
|
|
|
|
<title>cancel</title>
|
|
|
|
<p>
|
|
Halting an Impala query before it is completely finished.
|
|
</p>
|
|
</section>
|
|
|
|
<section id="glos_streaming">
|
|
|
|
<title>streaming</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_sorting">
|
|
|
|
<title>sorting</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_aggregation">
|
|
|
|
<title>aggregation</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_fragment">
|
|
|
|
<title>fragment</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_source">
|
|
|
|
<title>source</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_sink">
|
|
|
|
<title>sink</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_thrift">
|
|
|
|
<title>Thrift</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_delegation">
|
|
|
|
<title>delegation</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_authorization">
|
|
|
|
<title>authorization</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_authentication">
|
|
|
|
<title>authentication</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_partition_pruning">
|
|
|
|
<title>partition pruning</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_heartbeat">
|
|
|
|
<title>heartbeat</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_subscriber">
|
|
|
|
<title>subscriber</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_topic">
|
|
|
|
<title>topic</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_broadcast_join">
|
|
|
|
<title>broadcast join</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<section id="glos_shuffle_join">
|
|
|
|
<title>shuffle join</title>
|
|
|
|
<p></p>
|
|
</section>
|
|
|
|
<!-- Use as a template for new definitions:
|
|
<section id="glos_">
|
|
<title></title>
|
|
<p>
|
|
</p>
|
|
</section>
|
|
|
|
-->
|
|
</conbody>
|
|
</concept>
|