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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>
122 lines
4.6 KiB
XML
122 lines
4.6 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="tinyint">
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<title>TINYINT Data Type</title>
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<titlealts audience="PDF"><navtitle>TINYINT</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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A 1-byte integer data type used in <codeph>CREATE TABLE</codeph> and <codeph>ALTER TABLE</codeph> statements.
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</p>
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<p conref="../shared/impala_common.xml#common/syntax_blurb"/>
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<p>
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In the column definition of a <codeph>CREATE TABLE</codeph> statement:
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</p>
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<codeblock><varname>column_name</varname> TINYINT</codeblock>
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<p>
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<b>Range:</b> -128 .. 127. There is no <codeph>UNSIGNED</codeph> subtype.
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</p>
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<p>
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<b>Conversions:</b> Impala automatically converts to a larger integer type (<codeph>SMALLINT</codeph>,
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<codeph>INT</codeph>, or <codeph>BIGINT</codeph>) or a floating-point type (<codeph>FLOAT</codeph> or
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<codeph>DOUBLE</codeph>) automatically. Use <codeph>CAST()</codeph> to convert to <codeph>STRING</codeph> or
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<codeph>TIMESTAMP</codeph>.
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<ph conref="../shared/impala_common.xml#common/cast_int_to_timestamp"/>
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</p>
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<p conref="../shared/impala_common.xml#common/int_overflow_behavior"/>
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<p conref="../shared/impala_common.xml#common/usage_notes_blurb"/>
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<p>
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For a convenient and automated way to check the bounds of the <codeph>TINYINT</codeph> type, call the
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functions <codeph>MIN_TINYINT()</codeph> and <codeph>MAX_TINYINT()</codeph>.
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</p>
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<p>
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If an integer value is too large to be represented as a <codeph>TINYINT</codeph>, use a
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<codeph>SMALLINT</codeph> instead.
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</p>
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<p conref="../shared/impala_common.xml#common/null_bad_numeric_cast"/>
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<p conref="../shared/impala_common.xml#common/example_blurb"/>
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<codeblock>CREATE TABLE t1 (x TINYINT);
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SELECT CAST(100 AS TINYINT);
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</codeblock>
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<p conref="../shared/impala_common.xml#common/parquet_blurb"/>
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<!-- Duplicated under TINYINT and SMALLINT. Turn into a conref in both places. -->
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<p rev="1.4.0">
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Physically, Parquet files represent <codeph>TINYINT</codeph> and <codeph>SMALLINT</codeph> values as 32-bit
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integers. Although Impala rejects attempts to insert out-of-range values into such columns, if you create a
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new table with the <codeph>CREATE TABLE ... LIKE PARQUET</codeph> syntax, any <codeph>TINYINT</codeph> or
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<codeph>SMALLINT</codeph> columns in the original table turn into <codeph>INT</codeph> columns in the new
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table.
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</p>
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<!-- <p conref="../shared/impala_common.xml#common/partitioning_blurb"/> -->
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<p conref="../shared/impala_common.xml#common/hbase_ok"/>
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<p conref="../shared/impala_common.xml#common/text_bulky"/>
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<!-- <p conref="../shared/impala_common.xml#common/compatibility_blurb"/> -->
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<p conref="../shared/impala_common.xml#common/internals_1_bytes"/>
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<p conref="../shared/impala_common.xml#common/added_forever"/>
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<p conref="../shared/impala_common.xml#common/column_stats_constant"/>
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<!-- <p conref="../shared/impala_common.xml#common/restrictions_blurb"/> -->
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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_literals.xml#numeric_literals"/>, <xref href="impala_tinyint.xml#tinyint"/>,
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<xref href="impala_smallint.xml#smallint"/>, <xref href="impala_int.xml#int"/>,
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<xref href="impala_bigint.xml#bigint"/>, <xref href="impala_decimal.xml#decimal"/>,
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<xref href="impala_math_functions.xml#math_functions"/>
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</p>
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</conbody>
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</concept>
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