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More sensible character_octet_length

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For character types with typmod, character_octet_length columns in the
information schema now show the maximum character length times the
maximum length of a character in the server encoding, instead of some
huge value as before.
This commit is contained in:
Peter Eisentraut
2009-07-07 18:23:15 +00:00
parent 788d8e5139
commit e292dbcf54
6 changed files with 37 additions and 18 deletions
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23
doc/src/sgml/information_schema.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/information_schema.sgml,v 1.39 2009/06/10 07:03:34 petere Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/information_schema.sgml,v 1.40 2009/07/07 18:23:13 petere Exp $ -->
<chapter id="information-schema">
<title>The Information Schema</title>
@ -343,10 +343,10 @@
<entry><type>cardinal_number</type></entry>
<entry>
If <literal>data_type</literal> identifies a character type,
the maximum possible length in octets (bytes) of a datum (this
should not be of concern to
<productname>PostgreSQL</productname> users); null for all
other data types.
the maximum possible length in octets (bytes) of a datum; null
for all other data types. The maximum octet length depends on
the declared character maximum length (see above) and the
server encoding.
</entry>
</row>
@ -947,9 +947,10 @@
<entry><type>cardinal_number</type></entry>
<entry>
If <literal>data_type</literal> identifies a character type,
the maximum possible length in octets (bytes) of a datum (this
should not be of concern to <productname>PostgreSQL</productname> users); null for all
other data types.
the maximum possible length in octets (bytes) of a datum; null
for all other data types. The maximum octet length depends on
the declared character maximum length (see above) and the
server encoding.
</entry>
</row>
@ -1688,9 +1689,9 @@
<entry><type>cardinal_number</type></entry>
<entry>
If the domain has a character type, the maximum possible length
in octets (bytes) of a datum (this should not be of concern to
<productname>PostgreSQL</productname> users); null for all
other data types.
in octets (bytes) of a datum; null for all other data types.
The maximum octet length depends on the declared character
maximum length (see above) and the server encoding.
</entry>
</row>