docs/topics/impala_bigint.xml

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<!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
<concept id="bigint">

  <title>BIGINT Data Type</title>
  <titlealts audience="PDF"><navtitle>BIGINT</navtitle></titlealts>
  <prolog>
    <metadata>
      <data name="Category" value="Impala"/>
      <data name="Category" value="Impala Data Types"/>
      <data name="Category" value="SQL"/>
      <data name="Category" value="Data Analysts"/>
      <data name="Category" value="Developers"/>
      <data name="Category" value="Schemas"/>
    </metadata>
  </prolog>

  <conbody>

    <p>
      An 8-byte integer data type used in <codeph>CREATE TABLE</codeph> and <codeph>ALTER TABLE</codeph>
      statements.
    </p>

    <p conref="../shared/impala_common.xml#common/syntax_blurb"/>

    <p>
      In the column definition of a <codeph>CREATE TABLE</codeph> statement:
    </p>

<codeblock><varname>column_name</varname> BIGINT</codeblock>

    <p>
      <b>Range:</b> -9223372036854775808 .. 9223372036854775807. There is no <codeph>UNSIGNED</codeph> subtype.
    </p>

    <p>
      <b>Conversions:</b> Impala automatically converts to a floating-point type
        (<codeph>FLOAT</codeph> or <codeph>DOUBLE</codeph>) automatically. Use
        <codeph>CAST()</codeph> to convert to <codeph>TINYINT</codeph>,
        <codeph>SMALLINT</codeph>, <codeph>INT</codeph>,
      <codeph>STRING</codeph>, or <codeph>TIMESTAMP</codeph>. <ph
        conref="../shared/impala_common.xml#common/cast_int_to_timestamp"/>
    </p>

    <p conref="../shared/impala_common.xml#common/example_blurb"/>

<codeblock>CREATE TABLE t1 (x BIGINT);
SELECT CAST(1000 AS BIGINT);
</codeblock>

    <p conref="../shared/impala_common.xml#common/usage_notes_blurb"/>

    <p>
      <codeph>BIGINT</codeph> is a convenient type to use for column declarations because you can use any kind of
      integer values in <codeph>INSERT</codeph> statements and they are promoted to <codeph>BIGINT</codeph> where
      necessary. However, <codeph>BIGINT</codeph> also requires the most bytes of any integer type on disk and in
      memory, meaning your queries are not as efficient and scalable as possible if you overuse this type.
      Therefore, prefer to use the smallest integer type with sufficient range to hold all input values, and
      <codeph>CAST()</codeph> when necessary to the appropriate type.
    </p>

    <p>
      For a convenient and automated way to check the bounds of the <codeph>BIGINT</codeph> type, call the
      functions <codeph>MIN_BIGINT()</codeph> and <codeph>MAX_BIGINT()</codeph>.
    </p>

    <p>
      If an integer value is too large to be represented as a <codeph>BIGINT</codeph>, use a
      <codeph>DECIMAL</codeph> instead with sufficient digits of precision.
    </p>

    <p conref="../shared/impala_common.xml#common/null_bad_numeric_cast"/>

    <p conref="../shared/impala_common.xml#common/partitioning_good"/>

    <p conref="../shared/impala_common.xml#common/hbase_ok"/>

<!-- <p conref="../shared/impala_common.xml#common/parquet_blurb"/> -->

    <p conref="../shared/impala_common.xml#common/text_bulky"/>

<!-- <p conref="../shared/impala_common.xml#common/compatibility_blurb"/> -->

    <p conref="../shared/impala_common.xml#common/internals_8_bytes"/>

    <p conref="../shared/impala_common.xml#common/added_forever"/>

    <p conref="../shared/impala_common.xml#common/column_stats_constant"/>

    <p conref="../shared/impala_common.xml#common/sqoop_blurb" audience="hidden"/>

    <p conref="../shared/impala_common.xml#common/sqoop_timestamp_caveat"
      audience="hidden"/>

    <p conref="../shared/impala_common.xml#common/related_info"/>

    <p>
      <xref href="impala_literals.xml#numeric_literals"/>, <xref href="impala_tinyint.xml#tinyint"/>,
      <xref href="impala_smallint.xml#smallint"/>, <xref href="impala_int.xml#int"/>,
      <xref href="impala_bigint.xml#bigint"/>, <xref href="impala_decimal.xml#decimal"/>,
      <xref href="impala_math_functions.xml#math_functions"/>
    </p>
  </conbody>
</concept>