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Implement explicit date/time precision per SQL99 spec.

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Use CAST() mechanism to define CURRENT_TIME and CURRENT_TIMESTAMP.
This commit is contained in:
Thomas G. Lockhart 2001-10-05 06:37:42 +00:00
parent c24e5ddf5f
commit bd97e4e7be
1 changed files with 45 additions and 44 deletions
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89
src/backend/parser/gram.y
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@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.258 2001/10/03 20:54:21 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.259 2001/10/05 06:37:42 thomas Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -4251,8 +4251,8 @@ ConstDatetime: datetime
*/
$$->timezone = $5;
if (($3 < 0) || ($3 > 13))
elog(ERROR,"TIMESTAMP %s precision %d must be beween 0 and %d",
($5? " WITH TIME ZONE": ""), 0, 13);
elog(ERROR,"TIMESTAMP(%d) %s precision must be beween %d and %d",
$3, ($5? " WITH TIME ZONE": ""), 0, 13);
$$->typmod = $3;
}
| TIMESTAMP opt_timezone_x
@ -4276,8 +4276,8 @@ ConstDatetime: datetime
else
$$->name = xlateSqlType("time");
if (($3 < 0) || ($3 > 13))
elog(ERROR,"TIME %s precision %d must be beween 0 and %d",
($5? " WITH TIME ZONE": ""), 0, 13);
elog(ERROR,"TIME(%d) %s precision must be beween %d and %d",
$3, ($5? " WITH TIME ZONE": ""), 0, 13);
$$->typmod = $3;
}
| TIME opt_timezone
@ -4911,7 +4911,7 @@ c_expr: attr
*/
A_Const *s = makeNode(A_Const);
TypeName *t = makeNode(TypeName);
FuncCall *n = makeNode(FuncCall);
TypeName *d = makeNode(TypeName);
s->val.type = T_String;
s->val.val.str = "now";
@ -4921,12 +4921,12 @@ c_expr: attr
t->setof = FALSE;
t->typmod = -1;
n->funcname = xlateSqlType("date");
n->args = makeList1(s);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
d = makeNode(TypeName);
d->name = xlateSqlType("date");
d->setof = FALSE;
d->typmod = -1;
$$ = (Node *)n;
$$ = (Node *)makeTypeCast((Node *)s, d);
}
| CURRENT_TIME
{
@ -4936,7 +4936,7 @@ c_expr: attr
*/
A_Const *s = makeNode(A_Const);
TypeName *t = makeNode(TypeName);
FuncCall *n = makeNode(FuncCall);
TypeName *d = makeNode(TypeName);
s->val.type = T_String;
s->val.val.str = "now";
@ -4946,12 +4946,12 @@ c_expr: attr
t->setof = FALSE;
t->typmod = -1;
n->funcname = xlateSqlType("time");
n->args = makeList1(s);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
d = makeNode(TypeName);
d->name = xlateSqlType("time");
d->setof = FALSE;
d->typmod = 0;
$$ = (Node *)n;
$$ = (Node *)makeTypeCast((Node *)s, d);
}
| CURRENT_TIME '(' Iconst ')'
{
@ -4961,7 +4961,7 @@ c_expr: attr
*/
A_Const *s = makeNode(A_Const);
TypeName *t = makeNode(TypeName);
FuncCall *n = makeNode(FuncCall);
TypeName *d = makeNode(TypeName);
s->val.type = T_String;
s->val.val.str = "now";
@ -4971,26 +4971,25 @@ c_expr: attr
t->setof = FALSE;
t->typmod = -1;
n->funcname = xlateSqlType("time");
n->args = makeList1(s);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
d = makeNode(TypeName);
d->name = xlateSqlType("timetz");
d->setof = FALSE;
if (($3 < 0) || ($3 > 13))
elog(ERROR,"CURRENT_TIME(%d) precision must be between %d and %d",
$3, 0, 13);
d->typmod = $3;
if ($3 != 0)
elog(NOTICE,"CURRENT_TIME(%d) precision not implemented"
"; zero used instead",$3);
$$ = (Node *)n;
$$ = (Node *)makeTypeCast((Node *)s, d);
}
| CURRENT_TIMESTAMP
{
/*
* Translate as "timestamp('now'::text)".
* Translate as "timestamptz('now'::text)".
* See comments for CURRENT_DATE.
*/
A_Const *s = makeNode(A_Const);
TypeName *t = makeNode(TypeName);
FuncCall *n = makeNode(FuncCall);
TypeName *d = makeNode(TypeName);
s->val.type = T_String;
s->val.val.str = "now";
@ -5000,12 +4999,15 @@ c_expr: attr
t->setof = FALSE;
t->typmod = -1;
n->funcname = xlateSqlType("timestamp");
n->args = makeList1(s);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
/* SQL99 mandates a default precision of 6
* for timestamp. - thomas 2001-10-04
*/
d = makeNode(TypeName);
d->name = xlateSqlType("timestamptz");
d->setof = FALSE;
d->typmod = 6;
$$ = (Node *)n;
$$ = (Node *)makeTypeCast((Node *)s, d);
}
| CURRENT_TIMESTAMP '(' Iconst ')'
{
@ -5015,7 +5017,7 @@ c_expr: attr
*/
A_Const *s = makeNode(A_Const);
TypeName *t = makeNode(TypeName);
FuncCall *n = makeNode(FuncCall);
TypeName *d = makeNode(TypeName);
s->val.type = T_String;
s->val.val.str = "now";
@ -5025,16 +5027,15 @@ c_expr: attr
t->setof = FALSE;
t->typmod = -1;
n->funcname = xlateSqlType("timestamp");
n->args = makeList1(s);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
d = makeNode(TypeName);
d->name = xlateSqlType("timestamptz");
d->setof = FALSE;
if (($3 < 0) || ($3 > 13))
elog(ERROR,"CURRENT_TIMESTAMP(%d) precision must be beween %d and %d",
$3, 0, 13);
d->typmod = $3;
if ($3 != 0)
elog(NOTICE,"CURRENT_TIMESTAMP(%d) precision not implemented"
"; zero used instead",$3);
$$ = (Node *)n;
$$ = (Node *)makeTypeCast((Node *)s, d);
}
| CURRENT_USER
{