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NAME="VIEW-PG-AVAILABLE-EXTENSIONS"
>45.53. <TT
CLASS="STRUCTNAME"
>pg_available_extensions</TT
></A
></H1
><P
>   The <TT
CLASS="STRUCTNAME"
>pg_available_extensions</TT
> view lists the
   extensions that are available for installation.
   See also the
   <A
HREF="catalog-pg-extension.html"
><TT
CLASS="STRUCTNAME"
>pg_extension</TT
></A
>
   catalog, which shows the extensions currently installed.
  </P
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>Table 45-54. <TT
CLASS="STRUCTNAME"
>pg_available_extensions</TT
> Columns</B
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><TR
><TH
>Name</TH
><TH
>Type</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>name</TT
></TD
><TD
><TT
CLASS="TYPE"
>name</TT
></TD
><TD
>Extension name</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>default_version</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Name of default version, or <TT
CLASS="LITERAL"
>NULL</TT
> if none is
       specified</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>installed_version</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Currently installed version of the extension,
       or <TT
CLASS="LITERAL"
>NULL</TT
> if not installed</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>comment</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Comment string from the extension's control file</TD
></TR
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>pg_available_extensions</TT
> view is read only.
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