-<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.167 2008/07/11 07:02:43 petere Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/catalogs.sgml,v 2.168 2008/07/14 00:51:45 tgl Exp $ -->
<!--
Documentation of the system catalogs, directed toward PostgreSQL developers
-->
<entry>
A list of the most common values in the column. (NULL if
no values seem to be more common than any others.)
+ For some datatypes such as <type>tsvector</>, this is a list of
+ the most common element values rather than values of the type itself.
</entry>
</row>
<entry><type>real[]</type></entry>
<entry></entry>
<entry>
- A list of the frequencies of the most common values,
+ A list of the frequencies of the most common values or elements,
i.e., number of occurrences of each divided by total number of rows.
(NULL when <structfield>most_common_vals</structfield> is.)
- </entry>
+ </entry>
</row>
<row>