</para></entry>

</row>

<row>

<entry role="catalog_table_entry"><para role="column_definition">

<structfield>attcollation</structfield> <type>oid</type>

(references <link linkend="catalog-pg-collation"><structname>pg_collation</structname></link>.<structfield>oid</structfield>)

</para>

<para>

The defined collation of the column, or zero if the column is

not of a collatable data type

</para></entry>

</row>

<row>

<entry role="catalog_table_entry"><para role="column_definition">

<structfield>attstattarget</structfield> <type>int2</type>

of statistics accumulated for this column by

<link linkend="sql-analyze"><command>ANALYZE</command></link>.

A zero value indicates that no statistics should be collected.

Anegative value says to use the system default statistics target.

Anull value says to use the system default statistics target.

The exact meaning of positive values is data type-dependent.

For scalar data types, <structfield>attstattarget</structfield>

is both the target number of <quote>most common values</quote>

to collect, and the target number of histogram bins to create.

</para></entry>

</row>

<row>

<entry role="catalog_table_entry"><para role="column_definition">

<structfield>attcollation</structfield> <type>oid</type>

(references <link linkend="catalog-pg-collation"><structname>pg_collation</structname></link>.<structfield>oid</structfield>)

</para>

<para>

The defined collation of the column, or zero if the column is

not of a collatable data type

</para></entry>

</row>

<row>

<entry role="catalog_table_entry"><para role="column_definition">

<structfield>attacl</structfield> <type>aclitem[]</type>