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NAME="CATALOG-PG-AMPROC"
>48.5. <TT
CLASS="STRUCTNAME"
>pg_amproc</TT
></A
></H1
><P
>   The catalog <TT
CLASS="STRUCTNAME"
>pg_amproc</TT
> stores information about
   support procedures associated with access method operator families.  There
   is one row for each support procedure belonging to an operator family.
  </P
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><P
><B
>Table 48-5. <TT
CLASS="STRUCTNAME"
>pg_amproc</TT
> Columns</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><COL><COL><THEAD
><TR
><TH
>Name</TH
><TH
>Type</TH
><TH
>References</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>oid</TT
></TD
><TD
><TT
CLASS="TYPE"
>oid</TT
></TD
><TD
>&nbsp;</TD
><TD
>Row identifier (hidden attribute; must be explicitly selected)</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>amprocfamily</TT
></TD
><TD
><TT
CLASS="TYPE"
>oid</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
HREF="catalog-pg-opfamily.html"
><TT
CLASS="STRUCTNAME"
>pg_opfamily</TT
></A
>.oid</TT
></TD
><TD
>The operator family this entry is for</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>amproclefttype</TT
></TD
><TD
><TT
CLASS="TYPE"
>oid</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
HREF="catalog-pg-type.html"
><TT
CLASS="STRUCTNAME"
>pg_type</TT
></A
>.oid</TT
></TD
><TD
>Left-hand input data type of associated operator</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>amprocrighttype</TT
></TD
><TD
><TT
CLASS="TYPE"
>oid</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
HREF="catalog-pg-type.html"
><TT
CLASS="STRUCTNAME"
>pg_type</TT
></A
>.oid</TT
></TD
><TD
>Right-hand input data type of associated operator</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>amprocnum</TT
></TD
><TD
><TT
CLASS="TYPE"
>int2</TT
></TD
><TD
>&nbsp;</TD
><TD
>Support procedure number</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>amproc</TT
></TD
><TD
><TT
CLASS="TYPE"
>regproc</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
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><TT
CLASS="STRUCTNAME"
>pg_proc</TT
></A
>.oid</TT
></TD
><TD
>OID of the procedure</TD
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><P
>   The usual interpretation of the
   <TT
CLASS="STRUCTFIELD"
>amproclefttype</TT
> and <TT
CLASS="STRUCTFIELD"
>amprocrighttype</TT
> fields
   is that they identify the left and right input types of the operator(s)
   that a particular support procedure supports.  For some access methods
   these match the input data type(s) of the support procedure itself, for
   others not.  There is a notion of <SPAN
CLASS="QUOTE"
>"default"</SPAN
> support procedures for
   an index, which are those with <TT
CLASS="STRUCTFIELD"
>amproclefttype</TT
> and
   <TT
CLASS="STRUCTFIELD"
>amprocrighttype</TT
> both equal to the index operator class's
   <TT
CLASS="STRUCTFIELD"
>opcintype</TT
>.
  </P
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