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Tweak CREATE SEQUENCE grammar to be more SQL1999 standards compliant. 

Neil Conway
This commit is contained in:
Bruce Momjian 2002-11-10 00:10:20 +00:00
parent ebb531836a
commit 3eabc4490e
3 changed files with 34 additions and 19 deletions
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25
doc/src/sgml/ref/create_sequence.sgml
View File

@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_sequence.sgml,v 1.28 2002/05/18 15:44:47 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_sequence.sgml,v 1.29 2002/11/10 00:10:20 momjian Exp $
PostgreSQL documentation
-->
@ -21,9 +21,9 @@ PostgreSQL documentation
<date>1999-07-20</date>
</refsynopsisdivinfo>
<synopsis>
CREATE [ TEMPORARY | TEMP ] SEQUENCE <replaceable class="parameter">seqname</replaceable> [ INCREMENT <replaceable class="parameter">increment</replaceable> ]
CREATE [ TEMPORARY | TEMP ] SEQUENCE <replaceable class="parameter">seqname</replaceable> [ INCREMENT [ BY ] <replaceable class="parameter">increment</replaceable> ]
[ MINVALUE <replaceable class="parameter">minvalue</replaceable> ] [ MAXVALUE <replaceable class="parameter">maxvalue</replaceable> ]
[ START <replaceable class="parameter">start</replaceable> ] [ CACHE <replaceable class="parameter">cache</replaceable> ] [ CYCLE ]
[ START [ WITH ] <replaceable class="parameter">start</replaceable> ] [ CACHE <replaceable class="parameter">cache</replaceable> ] [ [ NO ] CYCLE ]
</synopsis>
<refsect2 id="R2-SQL-CREATESEQUENCE-1">
@ -130,8 +130,8 @@ CREATE [ TEMPORARY | TEMP ] SEQUENCE <replaceable class="parameter">seqname</rep
<term>CYCLE</term>
<listitem>
<para>
The optional CYCLE keyword may be used to enable the sequence
to wrap around when the
The optional <option>CYCLE</option> keyword may be used to enable
the sequence to wrap around when the
<replaceable class="parameter">maxvalue</replaceable> or
<replaceable class="parameter">minvalue</replaceable> has been
reached by
@ -140,11 +140,22 @@ CREATE [ TEMPORARY | TEMP ] SEQUENCE <replaceable class="parameter">seqname</rep
<replaceable class="parameter">minvalue</replaceable> or
<replaceable class="parameter">maxvalue</replaceable>,
respectively.
Without CYCLE, after the limit is reached <function>nextval</> calls
will return an error.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>NO CYCLE</term>
<listitem>
<para>
If the optional <option>NO CYCLE</option> keyword is specified, any
calls to <function>nextval</function> after the sequence has reached
its maximum value will return an error. If neither
<option>CYCLE</option> or <option>NO CYCLE</option> are specified,
<option>NO CYCLE</option> is the default.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>

8
src/backend/commands/sequence.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/sequence.c,v 1.88 2002/09/22 19:42:50 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/sequence.c,v 1.89 2002/11/10 00:10:20 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -798,11 +798,7 @@ init_params(CreateSeqStmt *seq, Form_pg_sequence new)
else if (strcmp(defel->defname, "cache") == 0)
cache_value = defel;
else if (strcmp(defel->defname, "cycle") == 0)
{
if (defel->arg != (Node *) NULL)
elog(ERROR, "DefineSequence: CYCLE ??");
new->is_cycled = true;
}
new->is_cycled = (defel->arg != NULL);
else
elog(ERROR, "DefineSequence: option \"%s\" not recognized",
defel->defname);

20
src/backend/parser/gram.y
View File

@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.374 2002/11/09 23:56:39 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.375 2002/11/10 00:10:20 momjian Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -1893,11 +1893,15 @@ OptSeqElem: CACHE NumericOnly
}
| CYCLE
{
$$ = makeDefElem("cycle", (Node *)NULL);
$$ = makeDefElem("cycle", (Node *)true);
}
| INCREMENT NumericOnly
| NO CYCLE
{
$$ = makeDefElem("increment", (Node *)$2);
$$ = makeDefElem("cycle", (Node *)false);
}
| INCREMENT opt_by NumericOnly
{
$$ = makeDefElem("increment", (Node *)$3);
}
| MAXVALUE NumericOnly
{
@ -1907,12 +1911,16 @@ OptSeqElem: CACHE NumericOnly
{
$$ = makeDefElem("minvalue", (Node *)$2);
}
| START NumericOnly
| START opt_with NumericOnly
{
$$ = makeDefElem("start", (Node *)$2);
$$ = makeDefElem("start", (Node *)$3);
}
;
opt_by: BY {}
| /* empty */ {}
;
NumericOnly:
FloatOnly { $$ = $1; }
| IntegerOnly { $$ = $1; }