mirror of
https://github.com/apache/impala.git
synced 2026-01-07 00:02:28 -05:00
3be0f122a5
These are refugees from doc_prototype. They can be rendered with the DITA Open Toolkit version 2.3.3 by: /tmp/dita-ot-2.3.3/bin/dita \ -i impala.ditamap \ -f html5 \ -o $(mktemp -d) \ -filter impala_html.ditaval Change-Id: I8861e99adc446f659a04463ca78c79200669484f Reviewed-on: http://gerrit.cloudera.org:8080/5014 Reviewed-by: John Russell <jrussell@cloudera.com> Tested-by: John Russell <jrussell@cloudera.com>
66 lines
2.2 KiB
XML
66 lines
2.2 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
|
|
<concept id="update">
|
|
|
|
<title>UPDATE Statement (<keyword keyref="impala28"/> or higher only)</title>
|
|
<titlealts audience="PDF"><navtitle>UPDATE</navtitle></titlealts>
|
|
<prolog>
|
|
<metadata>
|
|
<data name="Category" value="Impala"/>
|
|
<data name="Category" value="SQL"/>
|
|
<data name="Category" value="Kudu"/>
|
|
<data name="Category" value="ETL"/>
|
|
<data name="Category" value="Ingest"/>
|
|
<data name="Category" value="DML"/>
|
|
<data name="Category" value="Developers"/>
|
|
<data name="Category" value="Data Analysts"/>
|
|
</metadata>
|
|
</prolog>
|
|
|
|
<conbody>
|
|
|
|
<p>
|
|
<indexterm audience="Cloudera">UPDATE statement</indexterm>
|
|
Updates one or more rows from a Kudu table.
|
|
Although updating a single row or a range of rows would be inefficient for tables using HDFS
|
|
data files, Kudu is able to perform this operation efficiently. Therefore, this statement
|
|
only works for Impala tables that use the Kudu storage engine.
|
|
</p>
|
|
|
|
<p conref="../shared/impala_common.xml#common/syntax_blurb"/>
|
|
|
|
<codeblock>
|
|
</codeblock>
|
|
|
|
<p rev="kudu">
|
|
Normally, an <codeph>UPDATE</codeph> operation for a Kudu table fails if
|
|
some partition key columns are not found, due to their being deleted or changed
|
|
by a concurrent <codeph>UPDATE</codeph> or <codeph>DELETE</codeph> operation.
|
|
Specify <codeph>UPDATE IGNORE <varname>rest_of_statement</varname></codeph> to
|
|
make the <codeph>UPDATE</codeph> continue in this case. The rows with the nonexistent
|
|
duplicate partition key column values are not changed.
|
|
</p>
|
|
|
|
<p conref="../shared/impala_common.xml#common/dml_blurb"/>
|
|
|
|
<p conref="../shared/impala_common.xml#common/usage_notes_blurb"/>
|
|
|
|
<p conref="../shared/impala_common.xml#common/sync_ddl_blurb"/>
|
|
|
|
<note conref="../shared/impala_common.xml#common/compute_stats_next"/>
|
|
|
|
<p conref="../shared/impala_common.xml#common/example_blurb"/>
|
|
<codeblock>
|
|
|
|
</codeblock>
|
|
|
|
<p conref="../shared/impala_common.xml#common/related_info"/>
|
|
|
|
<p>
|
|
<xref href="impala_kudu.xml#impala_kudu"/>
|
|
</p>
|
|
|
|
</conbody>
|
|
|
|
</concept>
|