creation using WITH OIDS; that ability has been removed. Columns can

still be explicitly specified as type OID. Operations on tables that

have columns named 'oid' (created using WITH OIDS) will need adjustment.

Manysystem tablesnow have an 'oid' column thatwillbe expanded with

SELECT * by default.

The manysystem tableswith such columnswillnow display those columns

withSELECT * by default.

</para>

</listitem>

</para>

<para>

Previously multiple different recovery_target* variables could be specified, and last one specified was honored. Now, only one can be specified, though the same one can

Previously multiple different recovery_target* variables could be specified, andthelast one specified was honored. Now, only one can be specified, though the same one can

be specified multiple times and the last specification is honored.

</para>

</listitem>

-->

<para>

AllowATTACH PARTITIONto be performed with reduced locking requirements (Robert Haas)

ATTACH PARTITIONis now performed with reduced locking requirements (Robert Haas)

</para>

</listitem>

</para>

<para>

Btree indexes pg_upgraded from previous releases will not have this ordering. Thisdoesslightlyreduce the maximum length of indexed values.

Btree indexes pg_upgraded from previous releases will not have this ordering. This slightlyreduces the maximum length of indexed values.

</para>

</listitem>

</para>

<para>

Thisimprove optimization for columns with non-uniform distributions that often appear in WHERE clauses.

Thisimproves optimization for columns with non-uniform distributions that often appear in WHERE clauses.

</para>

</listitem>

</para>

<para>

The parameters log_statement_sample_rate and log_transaction_sample_ratecontrols this.

The parameters log_statement_sample_rate and log_transaction_sample_ratecontrol this.

</para>

</listitem>

-->

<para>

Allow more comparisons with information_schema text columns use indexes (Tom Lane)

Allow more comparisons with information_schema text columnstouse indexes (Tom Lane)

</para>

</listitem>

-->

<para>

Allow discovery of the LDAP server using DNS (Thomas Munro)

Allow discovery of the LDAP server using DNSSRV records(Thomas Munro)

</para>

<para>

</para>

<para>

The variable is shared_memory_type.It purpose is to allow selection of System V shared memory, if desired.

The variable is shared_memory_type.Its purpose is to allow selection of System V shared memory, if desired.

</para>

</listitem>