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From "Vuk Ercegovac (Code Review)" <>
Subject [Impala-ASF-CR] IMPALA-1767: [DOCS] Document new Boolean operators
Date Wed, 10 Jan 2018 06:49:52 GMT
Vuk Ercegovac has posted comments on this change. ( )

Change subject: IMPALA-1767: [DOCS] Document new Boolean operators

Patch Set 3:

File docs/topics/impala_operators.xml:
PS3, Line 1245: In <keyword keyref="impala211_full"/> and higher, you can use
              :         the operators <codeph>IS [NOT] TRUE</codeph> and
              :         <codeph>IS [NOT] FALSE</codeph> to perform <q>null-safe</q>
              :         tests against Boolean expressions. These operators always
              :         return <codeph>TRUE</codeph> or <codeph>FALSE</codeph>,
              :         even if the other side of the expression evaluates to
              :         <codeph>NULL</codeph>. These operators let you simplify
              :         Boolean comparisons that must also check for <codeph>NULL</codeph>,
              :         for example <codeph>X != 10 AND X IS NOT NULL</codeph>
is equivalent
              :         to <codeph>(X != 10) IS TRUE</codeph>.
              :       </p>
why is this explained here for IS UNKNOWN ? its a repeat of the content for the IS TRUE section.
PS3, Line 1260: IS [NOT] NULL
same thing twice. perhaps the first one should be IS [NOT] UNKNOWN ?
PS3, Line 1332: UNKNOWN
TRUE ? (UNKNOWN is handled in the prev section)

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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Iefebf210418ec2d47b154bd37166b76720f085bb
Gerrit-Change-Number: 8942
Gerrit-PatchSet: 3
Gerrit-Owner: John Russell <>
Gerrit-Reviewer: Greg Rahn <>
Gerrit-Reviewer: John Russell <>
Gerrit-Reviewer: Vuk Ercegovac <>
Gerrit-Comment-Date: Wed, 10 Jan 2018 06:49:52 +0000
Gerrit-HasComments: Yes

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