Sophie: postgresql9.4-docs-9.4.15-1.mga6 noarch

postgresql9.4-docs-9.4.15-1.mga6.noarch.rpm

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>DISCARD</H1
><DIV
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><A
NAME="AEN78928"
></A
><H2
>Name</H2
>DISCARD&nbsp;--&nbsp;discard session state</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN78931"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>DISCARD { ALL | PLANS | SEQUENCES | TEMPORARY | TEMP }</PRE
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><A
NAME="AEN78933"
></A
><H2
>Description</H2
><P
>   <TT
CLASS="COMMAND"
>DISCARD</TT
> releases internal resources associated with a
   database session.  This command is useful for partially or fully
   resetting the session's state.  There are several subcommands to
   release different types of resources; the <TT
CLASS="COMMAND"
>DISCARD ALL</TT
>
   variant subsumes all the others, and also resets additional state.
  </P
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><A
NAME="AEN78938"
></A
><H2
>Parameters</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="LITERAL"
>PLANS</TT
></DT
><DD
><P
>      Releases all cached query plans, forcing re-planning to occur
      the next time the associated prepared statement is used.
     </P
></DD
><DT
><TT
CLASS="LITERAL"
>SEQUENCES</TT
></DT
><DD
><P
>      Discards all cached sequence-related state,
      including <CODE
CLASS="FUNCTION"
>currval()</CODE
>/<CODE
CLASS="FUNCTION"
>lastval()</CODE
>
      information and any preallocated sequence values that have not
      yet been returned by <CODE
CLASS="FUNCTION"
>nextval()</CODE
>.
      (See <A
HREF="sql-createsequence.html"
>CREATE SEQUENCE</A
> for a description of
      preallocated sequence values.)
     </P
></DD
><DT
><TT
CLASS="LITERAL"
>TEMPORARY</TT
> or <TT
CLASS="LITERAL"
>TEMP</TT
></DT
><DD
><P
>      Drops all temporary tables created in the current session.
     </P
></DD
><DT
><TT
CLASS="LITERAL"
>ALL</TT
></DT
><DD
><P
>      Releases all temporary resources associated with the current
      session and resets the session to its initial state.
      Currently, this has the same effect as executing the following sequence
      of statements:
</P><PRE
CLASS="PROGRAMLISTING"
>SET SESSION AUTHORIZATION DEFAULT;
RESET ALL;
DEALLOCATE ALL;
CLOSE ALL;
UNLISTEN *;
SELECT pg_advisory_unlock_all();
DISCARD PLANS;
DISCARD SEQUENCES;
DISCARD TEMP;</PRE
><P></P
></DD
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><DIV
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><A
NAME="AEN78967"
></A
><H2
>Notes</H2
><P
>    <TT
CLASS="COMMAND"
>DISCARD ALL</TT
> cannot be executed inside a transaction block.
   </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN78971"
></A
><H2
>Compatibility</H2
><P
>   <TT
CLASS="COMMAND"
>DISCARD</TT
> is a <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> extension.
  </P
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