<table id="icu-collation-levels">

<title>ICU Collation Levels</title>

<tgroup cols="8">

<colspec colname="col1" colwidth="1*"/>

<colspec colname="col2" colwidth="1.25*"/>

<colspec colname="col3" colwidth="1*"/>

<colspec colname="col4" colwidth="1*"/>

<colspec colname="col5" colwidth="1*"/>

<colspec colname="col6" colwidth="1*"/>

<colspec colname="col7" colwidth="1*"/>

<colspec colname="col8" colwidth="1*"/>

<thead>

<row>

<entry>Level</entry>

<table id="icu-collation-settings-table">

<title>ICU Collation Settings</title>

<tgroup cols="4">

<colspec colname="col1" colwidth="1*"/>

<colspec colname="col2" colwidth="2*"/>

<colspec colname="col3" colwidth="2*"/>

<colspec colname="col4" colwidth="5*"/>

<thead>

<row>

<entry>Key</entry>

</para>

<para>

Full normalization is important in some cases, such as when

multiple accents are applied to a single character. For instance,

<literal>'ệ'</literal> can be composed of code points

<literal>U&amp;'\0065\0323\0302'</literal> or

<literal>U&amp;'\0065\0302\0323'</literal>. With full normalization

multiple accents are applied to a single character. For example,

the code point sequences <literal>U&amp;'\0065\0323\0302'</literal>

and <literal>U&amp;'\0065\0302\0323'</literal> represent

an <literal>e</literal> with circumflex and dot-below accents

applied in different orders. With full normalization

on, these code point sequences are treated as equal; otherwise they

are unequal.

</para>

<listitem>

<para>

Change date_trunc(unit, timestamptz, time_zone) to be an immutable function (Przemysław Sztoch)

Change date_trunc(unit, timestamptz, time_zone) to be an immutable function (Przemyslaw Sztoch)

</para>

<para>