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Editing and markup cleanup.

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Thomas G. Lockhart
1998-09-22 15:48:03 +00:00
parent 748e300317
commit 52ca2ab268
23 changed files with 1222 additions and 926 deletions
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12
doc/src/sgml/ref/create_index.sgml
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@@ -41,7 +41,7 @@ CREATE [ UNIQUE ] INDEX <replaceable class="parameter">index_name</replaceable>
<LISTITEM>
<PARA>
Causes the system to check for
duplicate values when the index is created (if data
duplicate values in the table when the index is created (if data
already exist) and each time data is added. Attempts to
insert or update non-duplicate data will generate an
error.
@@ -76,7 +76,7 @@ CREATE [ UNIQUE ] INDEX <replaceable class="parameter">index_name</replaceable>
<PARA>
the name of the access method which is to be used for
the index. The default access method is BTREE.
Postgres provides three access methods for secondary indices:
Postgres provides three access methods for secondary indexes:
<variablelist>
<varlistentry>
<term>BTREE</term>
@@ -208,14 +208,14 @@ SELECT am.amname AS acc_name,
Description
</TITLE>
<PARA>
This command constructs an index
<command>CREATE INDEX</command> constructs an index
<replaceable class="parameter">index_name</replaceable>.
on the specified
<replaceable class="parameter">table</replaceable>.
<tip>
<para>
Indices are primarily used to enhance database performance.
Indexes are primarily used to enhance database performance.
But inappropriate use will result in slower performance.
</tip>
@@ -236,7 +236,7 @@ But inappropriate use will result in slower performance.
on the result of a user-defined function
<replaceable class="parameter">func_name</replaceable> applied
to one or more attributes of a single class. These functional
indices can be used to obtain fast access to data
indexes can be used to obtain fast access to data
based on operators that would normally require some
transformation to apply them to the base data.
</para>
@@ -250,7 +250,7 @@ But inappropriate use will result in slower performance.
</TITLE>
<PARA>
Currently, only the BTREE access method supports multi-column
indices. Up to 7 keys may be specified.
indexes. Up to 7 keys may be specified.
</PARA>
<para>
Use <command>DROP INDEX</command>