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doc: Add some images

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Add infrastructure for having images in the documentation, in SVG
format.  Add two images to start with.  See the included README file
for instructions.

Author: Jürgen Purtz <juergen@purtz.de>
Author: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Discussion: https://www.postgresql.org/message-id/flat/aaa54502-05c0-4ea5-9af8-770411a6bf4b@purtz.de
This commit is contained in:
Peter Eisentraut
2019-03-27 22:57:43 +01:00
parent 477422c9d1
commit ea55aec0a9
14 changed files with 602 additions and 6 deletions
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12
doc/src/sgml/gin.sgml
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@@ -436,7 +436,8 @@
page contains either a pointer to a B-tree of heap pointers (a
<quote>posting tree</quote>), or a simple list of heap pointers (a <quote>posting
list</quote>) when the list is small enough to fit into a single index tuple along
with the key value.
with the key value. <xref linkend="gin-internals-figure"/> illustrates
these components of a GIN index.
</para>
<para>
@@ -453,6 +454,15 @@
key values for different columns can be of different types.
</para>
<figure id="gin-internals-figure">
<title>GIN Internals</title>
<mediaobject>
<imageobject>
<imagedata fileref="images/gin.svg" format="SVG" width="100%"/>
</imageobject>
</mediaobject>
</figure>
<sect2 id="gin-fast-update">
<title>GIN Fast Update Technique</title>