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Postgres FD Implementation
Commit f947bbb3 authored by Bruce Momjian's avatar Bruce Momjian
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Attached is are diffs for CREATE/ALTER table doc I've 

    forgotten in my mailbox (sorry). Haven't tried to  apply  and
    since I don't have working sgml stuff cannot check.

Jan
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doc/src/FAQ.html
View file @ f947bbb3
......@@ -181,6 +181,8 @@ The original name of the software at Berkeley was Postgres. When SQL
functionality was added in 1995, its name was changed to Postgres95. The
name was changed at the end of 1996 to PostgreSQL.<P>
It is pronounced <I>Post-Gres-Q-L.</I>
<H4><A NAME="1.2">1.2</A>) What's the copyright on
PostgreSQL?</H4><P>
......
doc/src/sgml/ref/alter_table.sgml
View file @ f947bbb3
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.11 2000/03/27 17:14:42 thomas Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_table.sgml,v 1.12 2000/04/11 14:43:54 momjian Exp $
Postgres documentation
-->
......@@ -34,6 +34,8 @@ ALTER TABLE <replaceable class="PARAMETER">table</replaceable> [ * ]
class="PARAMETER">newcolumn</replaceable>
ALTER TABLE <replaceable class="PARAMETER">table</replaceable>
RENAME TO <replaceable class="PARAMETER">newtable</replaceable>
ALTER TABLE <replaceable class="PARAMETER">table</replaceable>
ADD <replaceable class="PARAMETER">table constraint definition</replaceable>
</synopsis>
<refsect2 id="R2-SQL-ALTERTABLE-1">
......@@ -89,6 +91,15 @@ ALTER TABLE <replaceable class="PARAMETER">table</replaceable>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="PARAMETER"> table constraint definition </replaceable></term>
<listitem>
<para>
New table constraint for the table
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>
......@@ -144,6 +155,9 @@ ALTER TABLE <replaceable class="PARAMETER">table</replaceable>
the affected table. Thus, the table or column will
remain of the same type and size after this command is
executed.
The ADD <replaceable class="PARAMETER">table constraint definition</replaceable> clause
adds a new constraint to the table using the same syntax as <xref
linkend="SQL-CREATETABLE" endterm="SQL-CREATETABLE-title">.
</para>
<para>
......@@ -188,6 +202,16 @@ SELECT <replaceable>NewColumn</replaceable> FROM <replaceable>SuperClass</replac
endterm="sql-update-title">.)
</para>
<para>
In the current implementation, only FOREIGN KEY constraints can
be added to a table. To create or remove a unique constraint, create
a unique index (see <xref linkend="SQL-CREATEINDEX"
endterm="SQL-CREATEINDEX-title">). To add check constraints
you need to recreate and reload the table, using other
parameters to the <xref linkend="SQL-CREATETABLE"
endterm="SQL-CREATETABLE-title"> command.
</para>
<para>
You must own the class in order to change its schema.
Renaming any part of the schema of a system
......@@ -227,6 +251,13 @@ ALTER TABLE distributors RENAME COLUMN address TO city;
ALTER TABLE distributors RENAME TO suppliers;
</programlisting>
</para>
<para>
To add a foreign key constraint to a table:
<programlisting>
ALTER TABLE distributors ADD CONSTRAINT distfk FOREIGN KEY (address) REFERENCES addresses(address) MATCH FULL
</programlisting>
</para>
</refsect1>
<refsect1 id="R1-SQL-ALTERTABLE-3">
......@@ -253,17 +284,15 @@ ALTER TABLE distributors RENAME TO suppliers;
<varlistentry>
<term>
<synopsis>
ALTER TABLE <replaceable class="PARAMETER">table</replaceable> ADD <replaceable class="PARAMETER">table constraint definition</replaceable>
ALTER TABLE <replaceable class="PARAMETER">table</replaceable> DROP CONSTRAINT <replaceable class="PARAMETER">constraint</replaceable> { RESTRICT | CASCADE }
</synopsis>
</term>
<listitem>
<para>
Adds or removes a table constraint (such as a check constraint,
unique constraint, or foreign key constraint). To create
or remove a unique constraint, create or drop a unique index,
respectively (see <xref linkend="SQL-CREATEINDEX" endterm="SQL-CREATEINDEX-title">).
To change other kinds of constraints you need to recreate
Removes a table constraint (such as a check constraint,
unique constraint, or foreign key constraint). To
remove a unique constraint, drop a unique index,
To remove other kinds of constraints you need to recreate
and reload the table, using other parameters to the
<xref linkend="SQL-CREATETABLE" endterm="SQL-CREATETABLE-title">
command.
......
doc/src/sgml/ref/create_table.sgml
View file @ f947bbb3
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_table.sgml,v 1.19 2000/04/08 02:44:55 momjian Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_table.sgml,v 1.20 2000/04/11 14:43:54 momjian Exp $
Postgres documentation
-->
......@@ -450,7 +450,15 @@ CREATE TABLE distributors (
<synopsis>
[ CONSTRAINT <replaceable class="parameter">name</replaceable> ] { [
NULL | NOT NULL ] | UNIQUE | PRIMARY KEY | CHECK <replaceable
class="parameter">constraint</replaceable> } [, ...]
class="parameter">constraint</replaceable> | REFERENCES
<replaceable class="parameter">referenced table</replaceable>
(<replaceable class="parameter">referenced column</replaceable>)
[ MATCH <replaceable class="parameter">match type</replaceable> ]
[ ON DELETE <replaceable class="parameter">action</replaceable> ]
[ ON UPDATE <replaceable class="parameter">action</replaceable> ]
[ [ NOT ] DEFERRABLE ]
[ INITIALLY <replaceable class="parameter"> check time </replaceable> ] }
[, ...]
</synopsis>
</para>
......@@ -920,6 +928,278 @@ ERROR: Cannot insert a duplicate key into a unique index.
</para>
</refsect3>
</refsect2>
<refsect2 id="R2-SQL-REFERENCES-1">
<refsect2info>
<date>2000-02-04</date>
</refsect2info>
<title>
REFERENCES Constraint
</title>
<synopsis>
[ CONSTRAINT <replaceable class="parameter">name</replaceable> ] REFERENCES
<replaceable class="parameter">referenced table</replaceable> [ ( <replaceable class="parameter"> referenced column</replaceable> ) ]
[ MATCH <replaceable class="parameter">matchtype</replaceable> ]
[ ON DELETE <replaceable class="parameter">action</replaceable> ]
[ ON UPDATE <replaceable class="parameter">action</replaceable> ]
[ [ NOT ] DEFERRABLE ]
[ INITIALLY <replaceable class="parameter"> check time </replaceable> ]
</synopsis>
<para>
The REFERENCES constraint specifies a rule that a column
value is checked against the values of another column.
REFERENCES can also be specified as part of
a FOREIGN KEY table constraint.
</para>
<refsect3 id="R3-SQL-REFERENCES-1">
<title>Inputs</title>
<para>
<variablelist>
<varlistentry>
<term>CONSTRAINT <replaceable class="PARAMETER">name</replaceable></term>
<listitem>
<para>
An arbitrary name for the constraint.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">referenced table</replaceable></term>
<listitem>
<para>
The table that contains the data to check against.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">referenced column</replaceable></term>
<listitem>
<para>
The column in the <replaceable class="parameter">referenced table</replaceable>
to check the data against. If this is not specified, the PRIMARY KEY of the
<replaceable class="parameter">referenced table</replaceable> is used.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>MATCH <replaceable class="parameter">matchtype</replaceable></term>
<listitem>
<para>
The type of comparison to do between the table data. There are three
types of matching, MATCH FULL, MATCH PARTIAL, and the unspecified match type
used if no match type is specified.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>ON DELETE <replaceable class="parameter">action</replaceable></term>
<listitem>
<para>
The action to do when a referenced row in the referenced table is being
deleted. There are the following actions.
<variablelist>
<varlistentry>
<term>CASCADE</term>
<listitem>
<para>
Delete any rows referencing the deleted row.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RESTRICT</term>
<listitem>
<para>
Disallow deletion of rows being referenced.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>SET NULL</term>
<listitem>
<para>
Set the referencing column values to NULL.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>SET DEFAULT</term>
<listitem>
<para>
Set the referencing column values to their default value.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>NO ACTION</term>
<listitem>
<para>
Do nothing.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>ON UPDATE <replaceable class="parameter">action</replaceable></term>
<listitem>
<para>
The action to do when a referenced column in the referenced table is being
updated to a new value. If the row is updated, but the referenced column
is not changed, no action is done. There are the following actions.
<variablelist>
<varlistentry>
<term>CASCADE</term>
<listitem>
<para>
Update the value of the referencing column to the new value of the
referenced column.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RESTRICT</term>
<listitem>
<para>
Disallow update of row being referenced.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>SET NULL</term>
<listitem>
<para>
Set the referencing column values to NULL.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>SET DEFAULT</term>
<listitem>
<para>
Set the referencing column values to their default value.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>NO ACTION</term>
<listitem>
<para>
Do nothing.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term> [ NOT ] DEFERRABLE </term>
<listitem>
<para>
Tells the trigger manager whether this constraint may be
deferred to the end of transaction.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>INITIALLY <replaceable class="parameter"> check time </replaceable></term>
<listitem>
<para>
<replaceable class="parameter">check time</replaceable> has two possible values
which specify the default time to check the constraint.
<variablelist>
<varlistentry>
<term>DEFERRED</term>
<para>
Check this constraint at the end of the transaction.
</para>
</varlistentry>
<varlistentry>
<term>IMMEDIATE</term>
<para>
Check this constraint after each statement.
</para>
</varlistentry>
</variablelist>
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect3>
<refsect3 id="R3-SQL-REFERENCES-2">
<refsect3info>
<date>2000-02-04</date>
</refsect3info>
<title>
Outputs
</title>
<para>
<variablelist>
<varlistentry>
<term><replaceable>status</replaceable></term>
<listitem>
<para>
<variablelist>
<varlistentry>
<term><computeroutput>
ERROR: <replaceable class="parameter">name</replaceable> referential integrity violation - key referenced from
<replaceable class="parameter">table</replaceable> not found in <replaceable class="parameter">referenced table</replaceable>
</computeroutput></term>
<listitem>
<para>
This error occurs at runtime if one tries to insert a value
into a column which does not have a matching column in the
referenced table.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect3>
<refsect3 id="R3-SQL-REFERENCES-3">
<title>Description</title>
<para>
The REFERENCES column constraint specifies that a column of a
table must only contain values which match against values
in a referenced column of a referenced table.
</para>
<para>
A value added to this column are matched against the
values of the referenced table and referenced column using
the given match type.
In addition, when the referenced column data is changed,
actions are run upon this column's matching data.
</para>
</refsect3>
<refsect3 id="R3-SQL-REFERENCES-4">
<refsect3info>
<date>1998-09-11</date>
</refsect3info>
<title>
Notes
</title>
<para>
Currently <productname>Postgres</productname> only supports
MATCH FULL and an unspecified MATCH type.
In addition, the referenced columns are supposed to be
the columns of a UNIQUE constraint in the referenced table,
however <productname>Postgres</productname> does not
enforce this.
</para>
</refsect3>
</refsect1>
<refsect1 id="R1-SQL-TABLECONSTRAINT-1">
......@@ -930,6 +1210,14 @@ ERROR: Cannot insert a duplicate key into a unique index.
<synopsis>
[ CONSTRAINT name ] { PRIMARY KEY | UNIQUE } ( <replaceable class="parameter">column</replaceable> [, ...] )
[ CONSTRAINT name ] CHECK ( <replaceable>constraint</replaceable> )
[ CONSTRAINT name ] FOREIGN KEY ( <replaceable class="parameter">column</replaceable> [, ...] )
REFERENCES <replaceable class="parameter">referenced table</replaceable>
(<replaceable class="parameter">referenced column</replaceable> [, ...] )
[ MATCH <match type> ]
[ ON DELETE <replaceable class="parameter">action</replaceable> ]
[ ON UPDATE <replaceable class="parameter">action</replaceable> ]
[ [ NOT ] DEFERRABLE ]
[ INITIALLY <replaceable class="parameter"> check time </replaceable> ]
</synopsis>
</para>
<refsect2 id="R2-SQL-TABLECONSTRAINT-1">
......@@ -1174,6 +1462,270 @@ CREATE TABLE distributors (
information.
</para>
</refsect3>
</refsect2>
<refsect2 id="R2-SQL-REFERENCES-1">
<refsect2info>
<date>2000-02-04</date>
</refsect2info>
<title>
REFERENCES Constraint
</title>
<synopsis>
[ CONSTRAINT <replaceable class="parameter">name</replaceable> ]
FOREIGN KEY ( <replaceable class="parameter">column</replaceable> [, ...] ) REFERENCES
<replaceable class="parameter">referenced table</replaceable> [ ( <replaceable class="parameter">referenced column</replaceable> [, ...] ) ]
[ MATCH <replaceable class="parameter">matchtype</replaceable> ]
[ ON DELETE <replaceable class="parameter">action</replaceable> ]
[ ON UPDATE <replaceable class="parameter">action</replaceable> ]
[ [ NOT ] DEFERRABLE ]
[ INITIALLY <replaceable class="parameter"> check time </replaceable> ]
</synopsis>
<para>
The REFERENCES constraint specifies a rule that a column
value is checked against the values of another column.
REFERENCES can also be specified as part of
a FOREIGN KEY table constraint.
</para>
<refsect3 id="R3-SQL-REFERENCES-1">
<title>Inputs</title>
<para>
<variablelist>
<varlistentry>
<term>CONSTRAINT <replaceable class="PARAMETER">name</replaceable></term>
<listitem>
<para>
An arbitrary name for the constraint.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="PARAMETER">column</replaceable> [, ...]</term>
<listitem>
<para>
The names of one or more columns in the table.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">referenced table</replaceable></term>
<listitem>
<para>
The table that contains the data to check against.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">referenced column</replaceable> [, ...]</term>
<listitem>
<para>
One or more column in the <replaceable class="parameter">referenced table</replaceable>
to check the data against. If this is not specified, the PRIMARY KEY of the
<replaceable class="parameter">referenced table</replaceable> is used.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>MATCH <replaceable class="parameter">matchtype</replaceable></term>
<listitem>
<para>
The type of comparison to do between the table data. There are three
types of matching, MATCH FULL, MATCH PARTIAL, and the unspecified match type
used if no match type is specified.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>ON DELETE <replaceable class="parameter">action</replaceable></term>
<listitem>
<para>
The action to do when a referenced row in the referenced table is being
deleted. There are the following actions.
<variablelist>
<varlistentry>
<term>CASCADE</term>
<listitem>
<para>
Delete any rows referencing the deleted row.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RESTRICT</term>
<listitem>
<para>
Disallow deletion of rows being referenced.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>SET NULL</term>
<listitem>
<para>
Set the referencing column values to NULL.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>SET DEFAULT</term>
<listitem>
<para>
Set the referencing column values to their default value.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>NO ACTION</term>
<listitem>
<para>
Do nothing.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>ON UPDATE <replaceable class="parameter">action</replaceable></term>
<listitem>
<para>
The action to do when a referenced column in the referenced table is being
updated to a new value. If the row is updated, but the referenced column
is not changed, no action is done. There are the following actions.
<variablelist>
<varlistentry>
<term>CASCADE</term>
<listitem>
<para>
Update the value of the referencing column to the new value of the
referenced column.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>RESTRICT</term>
<listitem>
<para>
Disallow update of row being referenced.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>SET NULL</term>
<listitem>
<para>
Set the referencing column values to NULL.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>SET DEFAULT</term>
<listitem>
<para>
Set the referencing column values to their default value.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>NO ACTION</term>
<listitem>
<para>
Do nothing.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term> [ NOT ] DEFERRABLE </term>
<listitem>
<para>
Tells the trigger manager whether this constraint may be
deferred to the end of transaction.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>INITIALLY <replaceable class="parameter"> check time </replaceable></term>
<listitem>
<para>
<replaceable class="parameter">check time</replaceable> has two possible values
which specify the default time to check the constraint.
<variablelist>
<varlistentry>
<term>DEFERRED</term>
<para>
Check this constraint at the end of the transaction.
</para>
</varlistentry>
<varlistentry>
<term>IMMEDIATE</term>
<para>
Check this constraint after each statement.
</para>
</varlistentry>
</variablelist>
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect3>
<refsect3 id="R3-SQL-REFERENCES-2">
<refsect3info>
<date>2000-02-04</date>
</refsect3info>
<title>
Outputs
</title>
<para>
<variablelist>
<varlistentry>
<term><replaceable>status</replaceable></term>
<listitem>
<para>
<variablelist>
<varlistentry>
<term><computeroutput>
ERROR: <replaceable class="parameter">name</replaceable> referential integrity violation - key referenced from
<replaceable class="parameter">table</replaceable> not found in <replaceable class="parameter">referenced table</replaceable>
</computeroutput></term>
<listitem>
<para>
This error occurs at runtime if one tries to insert a value
into a column which does not have a matching column in the
referenced table.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect3>
<refsect3>
<title>Description</title>
<para>
The FOREIGN KEY constraint specifies a rule that a group of one
or more distinct columns of a table are related to a group
of distinct columns in the referenced table.
</para>
<para>
The FOREIGN KEY table constraint is similar to that for column constraints,
with the additional capability of encompassing multiple columns.
</para>
<para>
Refer to the section on the FOREIGN KEY column constraint for more
information.
</para>
</refsect3>
</refsect2>
......
doc/src/sgml/ref/pg_dump.sgml
View file @ f947bbb3
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.16 2000/04/04 05:22:45 tgl Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.17 2000/04/11 14:43:54 momjian Exp $
Postgres documentation
-->
......@@ -362,6 +362,16 @@ dumpSequence(<replaceable class="parameter">table</replaceable>): SELECT failed
Large objects are ignored and must be dealt with manually.
</para>
</listitem>
<listitem>
<para>
When doing a data only dump, <application>pg_dump</application> emits queries
to disable triggers on user tables before inserting the data and queries to
reenable them after the data has been inserted. If the restore is stopped
in the middle, the system catalogs may be left in the wrong state.
</para>
</listitem>
</itemizedlist>
</para>
</refsect1>
......
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