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Replace pg_attribute.attisinherited with attislocal and attinhcount

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columns, to allow more correct behavior in multiple-inheritance cases.
Patch by Alvaro Herrera, review by Tom Lane.
This commit is contained in:
Tom Lane
2002-09-22 19:42:52 +00:00
parent 634e440b58
commit c328b6dd8b
21 changed files with 578 additions and 293 deletions
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24
doc/src/sgml/catalogs.sgml
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@ -1,6 +1,6 @@
<!--
Documentation of the system catalogs, directed toward PostgreSQL developers
$Header: /cvsroot/pgsql/doc/src/sgml/catalogs.sgml,v 2.60 2002/09/18 21:35:20 tgl Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/catalogs.sgml,v 2.61 2002/09/22 19:42:50 tgl Exp $
-->
<chapter id="catalogs">
@ -822,12 +822,22 @@
</row>
<row>
<entry>attisinherited</entry>
<entry>attislocal</entry>
<entry><type>bool</type></entry>
<entry></entry>
<entry>
This column is inherited from some other relation. An inherited
column cannot be dropped nor renamed.
This column is defined locally in the relation. Note that a column may
be locally defined and inherited simultaneously.
</entry>
</row>
<row>
<entry>attinhcount</entry>
<entry><type>int4</type></entry>
<entry></entry>
<entry>
The number of direct ancestors this column has. A column with a
nonzero number of ancestors cannot be dropped nor renamed.
</entry>
</row>
@ -1213,8 +1223,8 @@
<entry></entry>
<entry>
'c' = check constraint,
'f' = foreign key constraint,
'p' = primary key constraint,
'f' = foreign key constraint,
'p' = primary key constraint,
'u' = unique constraint
</entry>
</row>
@ -3316,7 +3326,7 @@
when storing a value of this type. It applies to storage on
disk as well as most representations of the value inside
<productname>PostgreSQL</>.
When multiple values are stored consecutively, such
When multiple values are stored consecutively, such
as in the representation of a complete row on disk, padding is
inserted before a datum of this type so that it begins on the
specified boundary. The alignment reference is the beginning