Doc: improve documentation of pg_proc.protrftypes.
Add a "references" link pointing to pg_type, as we have for other arrays
of type OIDs.  Wordsmith the explanation a bit.
Joel Jacobson, additional editing by me
Discussion:
@@ -5874,7 +5874,7 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
(references <link linkend="catalog-pg-type"><structname>pg_type</structname></link>.<structfield>oid</structfield>)
</para>
<para>
- An array with the data types of the function arguments. This includes
+ An array of the data types of the function arguments. This includes
only input arguments (including <literal>INOUT</literal> and
<literal>VARIADIC</literal> arguments), as well as
<literal>OUT</literal> parameters of procedures, and thus represents
@@ -5888,7 +5888,7 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
(references <link linkend="catalog-pg-type"><structname>pg_type</structname></link>.<structfield>oid</structfield>)
</para>
<para>
- An array with the data types of the function arguments. This includes
+ An array of the data types of the function arguments. This includes
all arguments (including <literal>OUT</literal> and
<literal>INOUT</literal> arguments); however, if all the
arguments are <literal>IN</literal> arguments, this field will be null.
@@ -5902,7 +5902,7 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
<structfield>proargmodes</structfield> <type>char[]</type>
</para>
<para>
- An array with the modes of the function arguments, encoded as
+ An array of the modes of the function arguments, encoded as
<literal>i</literal> for <literal>IN</literal> arguments,
<literal>o</literal> for <literal>OUT</literal> arguments,
<literal>b</literal> for <literal>INOUT</literal> arguments,
@@ -5920,7 +5920,7 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
<structfield>proargnames</structfield> <type>text[]</type>
</para>
<para>
- An array with the names of the function arguments.
+ An array of the names of the function arguments.
Arguments without a name are set to empty strings in the array.
If none of the arguments have a name, this field will be null.
Note that subscripts correspond to positions of
@@ -5945,9 +5945,12 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>protrftypes</structfield> <type>oid[]</type>
+ (references <link linkend="catalog-pg-type"><structname>pg_type</structname></link>.<structfield>oid</structfield>)
</para>
<para>
- Data type OIDs for which to apply transforms.
+ An array of the argument/result data type(s) for which to apply
+ transforms (from the function's <literal>TRANSFORM</literal>
+ clause). Null if none.
</para></entry>
</row>
