IMPALA-6732: [DOCS] 2.12 Release Notes

Change-Id: Ia0eee2a5bd7d31afaff048f0ac6e46123eb56e47
Reviewed-on: http://gerrit.cloudera.org:8080/10071
Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
Reviewed-by: Sailesh Mukil <sailesh@cloudera.com>

docs/impala_keydefs.ditamap

@@ -10601,6 +10601,8 @@ under the License.
   <keydef keys="impala13_full"><topicmeta><keywords><keyword>Impala 1.3</keyword></keywords></topicmeta></keydef>
 
 <!-- Pointers to changelog pages -->
+  <keydef keys="changelog_300" href="https://impala.apache.org/docs/changelog-3.0.html" scope="external" format="html"/>
+  <keydef keys="changelog_212" href="https://impala.apache.org/docs/changelog-2.12.html" scope="external" format="html"/>
   <keydef keys="changelog_211" href="https://impala.apache.org/docs/changelog-2.11.html" scope="external" format="html"/>
   <keydef keys="changelog_210" href="https://impala.apache.org/docs/changelog-2.10.html" scope="external" format="html"/>
   <keydef keys="changelog_29" href="https://impala.apache.org/docs/changelog-2.9.html" scope="external" format="html"/>

docs/impala_release_notes.ditamap

@@ -20,7 +20,7 @@ under the License.
 <!DOCTYPE map PUBLIC "-//OASIS//DTD DITA Map//EN" "map.dtd">
 <map audience="standalone">
   <title>Apache Impala Release Notes</title>
-  <topicref href="topics/impala_relnotes.xml" audience="HTML standalone"/>
+<!--  <topicref href="topics/impala_relnotes.xml" audience="HTML standalone"/>-->
   <topicref href="topics/impala_new_features.xml"/>
   <topicref href="topics/impala_incompatible_changes.xml"/>
   <topicref href="topics/impala_known_issues.xml"/>

docs/topics/impala_fixed_issues.xml

@@ -46,11 +46,27 @@ under the License.
     <p outputclass="toc inpage"/>
   </conbody>
 
+<!-- All 2.12.x subsections go under here -->
+
+  <concept rev="2.12.0" id="fixed_issues_2_12_0">
+
+    <title>Issues Fixed in <keyword keyref="impala212"/></title>
+
+    <conbody>
+
+      <p>
+        For the full list of issues closed in this release, including bug fixes,
+        see the <xref keyref="changelog_212">changelog for <keyword keyref="impala212"/></xref>.
+      </p>
+
+    </conbody>
+  </concept>
+
 <!-- All 2.11.x subsections go under here -->
 
   <concept rev="2.11.0" id="fixed_issues_2_11_0">
 
-    <title>Issues Fixed in <keyword keyref="impala2110"/></title>
+    <title>Issues Fixed in <keyword keyref="impala211"/></title>
 
     <conbody>
 
@@ -66,7 +82,7 @@ under the License.
 
   <concept rev="2.10.0" id="fixed_issues_2100">
 
-    <title>Issues Fixed in <keyword keyref="impala2100"/></title>
+    <title>Issues Fixed in <keyword keyref="impala210"/></title>
 
     <conbody>
 

docs/topics/impala_incompatible_changes.xml

@@ -53,6 +53,22 @@ under the License.
     <p outputclass="toc inpage"/>
   </conbody>
 
+  <concept rev="2.12.0" id="incompatible_changes_212x">
+
+    <title>Incompatible Changes Introduced in Impala 2.12.x</title>
+
+    <conbody>
+
+      <p>
+        For the full list of issues closed in this release, including any that introduce
+        behavior changes or incompatibilities, see the
+        <xref keyref="changelog_212">changelog for <keyword keyref="impala212"/></xref>.
+      </p>
+
+    </conbody>
+
+  </concept>
+
   <concept rev="2.11.0" id="incompatible_changes_211x">
 
     <title>Incompatible Changes Introduced in Impala 2.11.x</title>

docs/topics/impala_new_features.xml

@@ -46,6 +46,23 @@ under the License.
 
   </conbody>
 
+<!-- All 2.12.x new features go under here -->
+
+  <concept rev="2.12.0" id="new_features_2120">
+
+    <title>New Features in <keyword keyref="impala212_full"/></title>
+
+    <conbody>
+
+      <p>
+        For the full list of issues closed in this release, including the issues
+        marked as <q>new features</q> or <q>improvements</q>, see the
+        <xref keyref="changelog_212">changelog for <keyword keyref="impala212"/></xref>.
+      </p>
+
+    </conbody>
+  </concept>
+
 <!-- All 2.11.x new features go under here -->
 
   <concept rev="2.11.0" id="new_features_2110">