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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 * 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 * HISTORY
* AUTHOR DATE MAJOR EVENT * AUTHOR DATE MAJOR EVENT
@ -4251,8 +4251,8 @@ ConstDatetime: datetime
*/ */
$$->timezone = $5; $$->timezone = $5;
if (($3 < 0) || ($3 > 13)) if (($3 < 0) || ($3 > 13))
elog(ERROR,"TIMESTAMP %s precision %d must be beween 0 and %d", elog(ERROR,"TIMESTAMP(%d) %s precision must be beween %d and %d",
($5? " WITH TIME ZONE": ""), 0, 13); $3, ($5? " WITH TIME ZONE": ""), 0, 13);
$$->typmod = $3; $$->typmod = $3;
} }
| TIMESTAMP opt_timezone_x | TIMESTAMP opt_timezone_x
@ -4276,8 +4276,8 @@ ConstDatetime: datetime
else else
$$->name = xlateSqlType("time"); $$->name = xlateSqlType("time");
if (($3 < 0) || ($3 > 13)) if (($3 < 0) || ($3 > 13))
elog(ERROR,"TIME %s precision %d must be beween 0 and %d", elog(ERROR,"TIME(%d) %s precision must be beween %d and %d",
($5? " WITH TIME ZONE": ""), 0, 13); $3, ($5? " WITH TIME ZONE": ""), 0, 13);
$$->typmod = $3; $$->typmod = $3;
} }
| TIME opt_timezone | TIME opt_timezone
@ -4911,7 +4911,7 @@ c_expr: attr
*/ */
A_Const *s = makeNode(A_Const); A_Const *s = makeNode(A_Const);
TypeName *t = makeNode(TypeName); TypeName *t = makeNode(TypeName);
FuncCall *n = makeNode(FuncCall); TypeName *d = makeNode(TypeName);
s->val.type = T_String; s->val.type = T_String;
s->val.val.str = "now"; s->val.val.str = "now";
@ -4921,12 +4921,12 @@ c_expr: attr
t->setof = FALSE; t->setof = FALSE;
t->typmod = -1; t->typmod = -1;
n->funcname = xlateSqlType("date"); d = makeNode(TypeName);
n->args = makeList1(s); d->name = xlateSqlType("date");
n->agg_star = FALSE; d->setof = FALSE;
n->agg_distinct = FALSE; d->typmod = -1;
$$ = (Node *)n; $$ = (Node *)makeTypeCast((Node *)s, d);
} }
| CURRENT_TIME | CURRENT_TIME
{ {
@ -4936,7 +4936,7 @@ c_expr: attr
*/ */
A_Const *s = makeNode(A_Const); A_Const *s = makeNode(A_Const);
TypeName *t = makeNode(TypeName); TypeName *t = makeNode(TypeName);
FuncCall *n = makeNode(FuncCall); TypeName *d = makeNode(TypeName);
s->val.type = T_String; s->val.type = T_String;
s->val.val.str = "now"; s->val.val.str = "now";
@ -4946,12 +4946,12 @@ c_expr: attr
t->setof = FALSE; t->setof = FALSE;
t->typmod = -1; t->typmod = -1;
n->funcname = xlateSqlType("time"); d = makeNode(TypeName);
n->args = makeList1(s); d->name = xlateSqlType("time");
n->agg_star = FALSE; d->setof = FALSE;
n->agg_distinct = FALSE; d->typmod = 0;
$$ = (Node *)n; $$ = (Node *)makeTypeCast((Node *)s, d);
} }
| CURRENT_TIME '(' Iconst ')' | CURRENT_TIME '(' Iconst ')'
{ {
@ -4961,7 +4961,7 @@ c_expr: attr
*/ */
A_Const *s = makeNode(A_Const); A_Const *s = makeNode(A_Const);
TypeName *t = makeNode(TypeName); TypeName *t = makeNode(TypeName);
FuncCall *n = makeNode(FuncCall); TypeName *d = makeNode(TypeName);
s->val.type = T_String; s->val.type = T_String;
s->val.val.str = "now"; s->val.val.str = "now";
@ -4971,26 +4971,25 @@ c_expr: attr
t->setof = FALSE; t->setof = FALSE;
t->typmod = -1; t->typmod = -1;
n->funcname = xlateSqlType("time"); d = makeNode(TypeName);
n->args = makeList1(s); d->name = xlateSqlType("timetz");
n->agg_star = FALSE; d->setof = FALSE;
n->agg_distinct = 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) $$ = (Node *)makeTypeCast((Node *)s, d);
elog(NOTICE,"CURRENT_TIME(%d) precision not implemented"
"; zero used instead",$3);
$$ = (Node *)n;
} }
| CURRENT_TIMESTAMP | CURRENT_TIMESTAMP
{ {
/* /*
* Translate as "timestamp('now'::text)". * Translate as "timestamptz('now'::text)".
* See comments for CURRENT_DATE. * See comments for CURRENT_DATE.
*/ */
A_Const *s = makeNode(A_Const); A_Const *s = makeNode(A_Const);
TypeName *t = makeNode(TypeName); TypeName *t = makeNode(TypeName);
FuncCall *n = makeNode(FuncCall); TypeName *d = makeNode(TypeName);
s->val.type = T_String; s->val.type = T_String;
s->val.val.str = "now"; s->val.val.str = "now";
@ -5000,12 +4999,15 @@ c_expr: attr
t->setof = FALSE; t->setof = FALSE;
t->typmod = -1; t->typmod = -1;
n->funcname = xlateSqlType("timestamp"); /* SQL99 mandates a default precision of 6
n->args = makeList1(s); * for timestamp. - thomas 2001-10-04
n->agg_star = FALSE; */
n->agg_distinct = FALSE; d = makeNode(TypeName);
d->name = xlateSqlType("timestamptz");
d->setof = FALSE;
d->typmod = 6;
$$ = (Node *)n; $$ = (Node *)makeTypeCast((Node *)s, d);
} }
| CURRENT_TIMESTAMP '(' Iconst ')' | CURRENT_TIMESTAMP '(' Iconst ')'
{ {
@ -5015,7 +5017,7 @@ c_expr: attr
*/ */
A_Const *s = makeNode(A_Const); A_Const *s = makeNode(A_Const);
TypeName *t = makeNode(TypeName); TypeName *t = makeNode(TypeName);
FuncCall *n = makeNode(FuncCall); TypeName *d = makeNode(TypeName);
s->val.type = T_String; s->val.type = T_String;
s->val.val.str = "now"; s->val.val.str = "now";
@ -5025,16 +5027,15 @@ c_expr: attr
t->setof = FALSE; t->setof = FALSE;
t->typmod = -1; t->typmod = -1;
n->funcname = xlateSqlType("timestamp"); d = makeNode(TypeName);
n->args = makeList1(s); d->name = xlateSqlType("timestamptz");
n->agg_star = FALSE; d->setof = FALSE;
n->agg_distinct = 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) $$ = (Node *)makeTypeCast((Node *)s, d);
elog(NOTICE,"CURRENT_TIMESTAMP(%d) precision not implemented"
"; zero used instead",$3);
$$ = (Node *)n;
} }
| CURRENT_USER | CURRENT_USER
{ {