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A word about constraint nature of DEFAULT.

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This commit is contained in:
Vadim B. Mikheev
1997-10-02 02:50:22 +00:00
parent 127f21c788
commit 61a72beda5
1 changed files with 4 additions and 2 deletions
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6
src/man/create_table.l
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@ -1,13 +1,13 @@
.\" This is -*-nroff-*- .\" This is -*-nroff-*-
.\" XXX standard disclaimer belongs here.... .\" XXX standard disclaimer belongs here....
.\" $Header: /cvsroot/pgsql/src/man/Attic/create_table.l,v 1.9 1997/10/01 17:05:13 thomas Exp $ .\" $Header: /cvsroot/pgsql/src/man/Attic/create_table.l,v 1.10 1997/10/02 02:50:22 vadim Exp $
.TH "CREATE TABLE" SQL 09/25/97 PostgreSQL .TH "CREATE TABLE" SQL 09/25/97 PostgreSQL
.SH NAME .SH NAME
create table \(em create a new class create table \(em create a new class
.SH SYNOPSIS .SH SYNOPSIS
.nf .nf
\fBcreate table\fR classname \fB(\fPattname type [not null] [\fBdefault\fP value] \fBcreate table\fR classname \fB(\fPattname type [not null] [\fBdefault\fP value]
[\fB,\fP attname type [\fBnot null\fP] [\fBdefault\fP value] ]\fB )\fP [\fB,\fP attname type [\fBdefault\fP value] [\fBnot null\fP] ]\fB )\fP
[\fBinherits\fR \fB(\fR classname [\fB,\fR classname] \fB)\fR] [\fBinherits\fR \fB(\fR classname [\fB,\fR classname] \fB)\fR]
[\fBconstraint\fR cname \fBcheck\fR \fB(\fR test \fB)\fR [, \fBcheck\fR \fB(\fR test \fB)\fR ] ] [\fBconstraint\fR cname \fBcheck\fR \fB(\fR test \fB)\fR [, \fBcheck\fR \fB(\fR test \fB)\fR ] ]
[\fBarchive\fR \fB=\fR archive_mode] [\fBarchive\fR \fB=\fR archive_mode]
@ -29,6 +29,8 @@ Each attribute may be specified to be non-null and
each may have a default value, specified by the each may have a default value, specified by the
.IR default .IR default
clause which is the keyword "default" followed by a constant or expression. clause which is the keyword "default" followed by a constant or expression.
\fBNote\fR: DEFAULT in version 6.2 works like constraint - there is no
way to insert NULL into an attribute having DEFAULT value.
.PP .PP
Each array attribute stores arrays that must have the same number of Each array attribute stores arrays that must have the same number of
dimensions but may have different sizes and array index bounds. An dimensions but may have different sizes and array index bounds. An