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Update to_regtype docs regarding error condition #2

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Update to_regtype docs regarding error condition #2

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9 changes: 5 additions & 4 deletions doc/src/sgml/func.sgml
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Expand Up @@ -25460,11 +25460,12 @@ SELECT collation for ('foo' COLLATE "de_DE");
<returnvalue>regtype</returnvalue>
</para>
<para>
Translates a textual type name to its OID. A similar result is
Parses a string of text, extracts a potential type name from it, and
translates that name into an OID. A similar result is
obtained by casting the string to type <type>regtype</type> (see
<xref linkend="datatype-oid"/>); however, this function will return
<literal>NULL</literal> rather than throwing an error if the name is
not found.
<xref linkend="datatype-oid"/>). Failure to extract a valid potential
type name results in an error; however, if the extracted name is not
known to the system, this function will return <literal>NULL</literal>.
</para></entry>
</row>
</tbody>
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