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Add pg_column_size() to return storage size of a column, including

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possible compression.

Mark Kirkwood
This commit is contained in:
Bruce Momjian
2005-07-06 19:02:54 +00:00
parent b9cb132648
commit a923602855
6 changed files with 114 additions and 6 deletions
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10
doc/src/sgml/func.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.262 2005/06/29 01:52:56 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.263 2005/07/06 19:02:52 momjian Exp $
PostgreSQL documentation
-->
@ -2186,6 +2186,14 @@ PostgreSQL documentation
<entry><literal>5</literal></entry>
</row>
<row>
<entry><literal><function>pg_column_size</function>(<parameter>string</parameter>)</literal></entry>
<entry><type>integer</type></entry>
<entry>Number of bytes required to store the value, which might be compressed</entry>
<entry><literal>pg_column_size('jo\\000se'::bytea)</literal></entry>
<entry><literal>5</literal></entry>
</row>
<row>
<entry><literal><function>position</function>(<parameter>substring</parameter> in <parameter>string</parameter>)</literal></entry>
<entry><type>integer</type></entry>