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Remove not-really-standard implementation of CREATE TABLE's UNDER clause,

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and revert documentation to describe the existing INHERITS clause
instead, per recent discussion in pghackers.  Also fix implementation
of SQL_inheritance SET variable: it is not cool to look at this var
during the initial parsing phase, only during parse_analyze().  See
recent bug report concerning misinterpretation of date constants just
after a SET TIMEZONE command.  gram.y really has to be an invariant
transformation of the query string to a raw parsetree; anything that
can vary with time must be done during parse analysis.
This commit is contained in:
Tom Lane
2001-01-05 06:34:23 +00:00
parent e62c38d0fc
commit 2fb6cc9045
19 changed files with 226 additions and 172 deletions
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6
doc/src/sgml/ref/alter_table.sgml
View File

@@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.17 2000/12/25 23:15:26 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.18 2001/01/05 06:34:16 tgl Exp $
Postgres documentation
-->
@@ -23,10 +23,10 @@ Postgres documentation
<date>1999-07-20</date>
</refsynopsisdivinfo>
<synopsis>
ALTER TABLE [ ONLY ]<replaceable class="PARAMETER">table</replaceable> [ * ]
ALTER TABLE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> [ * ]
ADD [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> <replaceable
class="PARAMETER">type</replaceable>
ALTER TABLE [ ONLY ]<replaceable class="PARAMETER">table</replaceable> [ * ]
ALTER TABLE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> [ * ]
ALTER [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> { SET DEFAULT <replaceable
class="PARAMETER">value</replaceable> | DROP DEFAULT }
ALTER TABLE <replaceable class="PARAMETER">table</replaceable> [ * ]

29
doc/src/sgml/ref/create_table.sgml
View File

@@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_table.sgml,v 1.38 2000/12/30 19:00:11 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_table.sgml,v 1.39 2001/01/05 06:34:16 tgl Exp $
Postgres documentation
-->
@@ -20,12 +20,10 @@ Postgres documentation
</refnamediv>
<refsynopsisdiv>
<refsynopsisdivinfo>
<date>2000-03-25</date>
<date>2001-01-04</date>
</refsynopsisdivinfo>
<synopsis>
CREATE [ TEMPORARY | TEMP ] TABLE <replaceable class="PARAMETER">table</replaceable>
[ UNDER <replaceable>inherited_table</replaceable> [, ...] ]
(
CREATE [ TEMPORARY | TEMP ] TABLE <replaceable class="PARAMETER">table</replaceable> (
<replaceable class="PARAMETER">column</replaceable> <replaceable class="PARAMETER">type</replaceable>
[ NULL | NOT NULL ] [ UNIQUE ] [ DEFAULT <replaceable class="PARAMETER">value</replaceable> ]
[<replaceable>column_constraint_clause</replaceable> | PRIMARY KEY } [ ... ] ]
@@ -33,7 +31,7 @@ CREATE [ TEMPORARY | TEMP ] TABLE <replaceable class="PARAMETER">table</replacea
[, PRIMARY KEY ( <replaceable class="PARAMETER">column</replaceable> [, ...] ) ]
[, CHECK ( <replaceable class="PARAMETER">condition</replaceable> ) ]
[, <replaceable>table_constraint_clause</replaceable> ]
)
) [ INHERITS ( <replaceable>inherited_table</replaceable> [, ...] ) ]
</synopsis>
<refsect2 id="R2-SQL-CREATETABLE-1">
@@ -132,10 +130,10 @@ CREATE [ TEMPORARY | TEMP ] TABLE <replaceable class="PARAMETER">table</replacea
</varlistentry>
<varlistentry>
<term>UNDER <replaceable class="PARAMETER">inherited_table</replaceable></term>
<term>INHERITS <replaceable class="PARAMETER">inherited_table</replaceable></term>
<listitem>
<para>
The optional UNDER clause specifies a collection of table
The optional INHERITS clause specifies a list of table
names from which this table automatically inherits all fields.
If any inherited field name appears more than once,
<productname>Postgres</productname>
@@ -231,7 +229,7 @@ ERROR: DEFAULT: type mismatched
</para>
<para>
The optional UNDER
The optional INHERITS
clause specifies a collection of table names from which this table
automatically inherits all fields. If any inherited field name
appears more than once, Postgres reports an error. Postgres automatically
@@ -2154,6 +2152,19 @@ ALTER DOMAIN cities
</synopsis>
</para>
</refsect3>
<refsect3 id="R3-SQL-INHERITANCE-1">
<title>
Inheritance
</title>
<para>
Multiple inheritance via the INHERITS clause is a
<productname>Postgres</productname> language extension.
SQL99 (but not SQL92) defines single inheritance using a different
syntax and different semantics. SQL99-style inheritance is not yet
supported by <productname>Postgres</productname>.
</para>
</refsect3>
</refsect2>
</refsect1>
</refentry>