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Break transformCreateStmt() into multiple routines and make

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transformAlterStmt() use these routines, instead of having lots of
duplicate (not to mention should-have-been-duplicate) code.
Adding a column with a CHECK constraint actually works now,
and the tests to reject unsupported DEFAULT and NOT NULL clauses
actually fire now.  ALTER TABLE ADD PRIMARY KEY works, modulo
having to have created the column(s) NOT NULL already.
This commit is contained in:
Tom Lane
2001-10-12 00:07:15 +00:00
parent e98476eb03
commit f9e6e27c87
9 changed files with 1162 additions and 1217 deletions
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20
doc/src/sgml/ref/alter_table.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.28 2001/09/12 02:13:25 ishii Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.29 2001/10/12 00:07:14 tgl Exp $
Postgres documentation
-->
@ -24,8 +24,7 @@ Postgres documentation
</refsynopsisdivinfo>
<synopsis>
ALTER TABLE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> [ * ]
ADD [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> <replaceable
class="PARAMETER">type</replaceable>
ADD [ COLUMN ] <replaceable class="PARAMETER">column</replaceable> <replaceable class="PARAMETER">type</replaceable> [ <replaceable class="PARAMETER">column_constraint</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 }
@ -202,21 +201,14 @@ ALTER TABLE <replaceable class="PARAMETER">table</replaceable>
<para>
In the current implementation of <literal>ADD COLUMN</literal>,
default and constraint clauses for the
new column will be ignored. You can use the <literal>SET DEFAULT</literal>
form of <command>ALTER TABLE</command> to set the default later.
default and NOT NULL clauses for the new column are not supported.
You can use the <literal>SET DEFAULT</literal> form
of <command>ALTER TABLE</command> to set the default later.
(You may also want to update the already existing rows to the
new default value, using <xref linkend="sql-update"
endterm="sql-update-title">.)
</para>
<para>
In the current implementation, only UNIQUE, FOREIGN KEY and CHECK constraints can
be added to a table. To create a primary constraint, create
a unique, not null index (see <xref linkend="SQL-CREATEINDEX"
endterm="SQL-CREATEINDEX-title">).
</para>
<para>
Currently only CHECK constraints can be dropped from a table. The RESTRICT
keyword is required, although dependencies are not checked. The CASCADE
@ -318,7 +310,7 @@ ALTER TABLE distributors ADD CONSTRAINT dist_id_zipcode_key UNIQUE (dist_id, zip
<title>SQL92</title>
<para>
The <literal>ADD COLUMN</literal> form is compliant with the exception that
it does not support defaults and constraints, as explained above.
it does not support defaults and NOT NULL constraints, as explained above.
The <literal>ALTER COLUMN</literal> form is in full compliance.
</para>