mirror of
https://github.com/postgres/postgres.git
synced 2025-04-25 21:42:33 +03:00
Fix the raw-parsetree representation of star (as in SELECT * FROM or
SELECT foo.*) so that it cannot be confused with a quoted identifier "*". Instead create a separate node type A_Star to represent this notation. Per pgsql-hackers discussion of 2007-Sep-27.
This commit is contained in:
Tom Lane
parent
6253f9de67
commit
449a00fbbd
@ -13,7 +13,7 @@
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/catalog/namespace.c,v 1.109 2008/07/16 16:55:23 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/catalog/namespace.c,v 1.110 2008/08/30 01:39:13 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -2189,6 +2189,9 @@ makeRangeVarFromNameList(List *names)
|
||||
*
|
||||
* This is used primarily to form error messages, and so we do not quote
|
||||
* the list elements, for the sake of legibility.
|
||||
*
|
||||
* In most scenarios the list elements should always be Value strings,
|
||||
* but we also allow A_Star for the convenience of ColumnRef processing.
|
||||
*/
|
||||
char *
|
||||
NameListToString(List *names)
|
||||
@ -2200,9 +2203,18 @@ NameListToString(List *names)
|
||||
|
||||
foreach(l, names)
|
||||
{
|
||||
Node *name = (Node *) lfirst(l);
|
||||
|
||||
if (l != list_head(names))
|
||||
appendStringInfoChar(&string, '.');
|
||||
appendStringInfoString(&string, strVal(lfirst(l)));
|
||||
|
||||
if (IsA(name, String))
|
||||
appendStringInfoString(&string, strVal(name));
|
||||
else if (IsA(name, A_Star))
|
||||
appendStringInfoString(&string, "*");
|
||||
else
|
||||
elog(ERROR, "unexpected node type in name list: %d",
|
||||
(int) nodeTag(name));
|
||||
}
|
||||
|
||||
return string.data;
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/commands/async.c,v 1.140 2008/03/26 21:10:37 alvherre Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/commands/async.c,v 1.141 2008/08/30 01:39:13 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -274,24 +274,16 @@ Async_Listen(const char *relname)
|
||||
void
|
||||
Async_Unlisten(const char *relname)
|
||||
{
|
||||
/* Handle specially the `unlisten "*"' command */
|
||||
if ((!relname) || (*relname == '\0') || (strcmp(relname, "*") == 0))
|
||||
{
|
||||
Async_UnlistenAll();
|
||||
}
|
||||
else
|
||||
{
|
||||
if (Trace_notify)
|
||||
elog(DEBUG1, "Async_Unlisten(%s,%d)", relname, MyProcPid);
|
||||
if (Trace_notify)
|
||||
elog(DEBUG1, "Async_Unlisten(%s,%d)", relname, MyProcPid);
|
||||
|
||||
queue_listen(LISTEN_UNLISTEN, relname);
|
||||
}
|
||||
queue_listen(LISTEN_UNLISTEN, relname);
|
||||
}
|
||||
|
||||
/*
|
||||
* Async_UnlistenAll
|
||||
*
|
||||
* This is invoked by UNLISTEN "*" command, and also at backend exit.
|
||||
* This is invoked by UNLISTEN * command, and also at backend exit.
|
||||
*/
|
||||
void
|
||||
Async_UnlistenAll(void)
|
||||
|
||||
@ -15,7 +15,7 @@
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.402 2008/08/28 23:09:45 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.403 2008/08/30 01:39:13 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -1697,6 +1697,14 @@ _copyFuncCall(FuncCall *from)
|
||||
return newnode;
|
||||
}
|
||||
|
||||
static A_Star *
|
||||
_copyAStar(A_Star *from)
|
||||
{
|
||||
A_Star *newnode = makeNode(A_Star);
|
||||
|
||||
return newnode;
|
||||
}
|
||||
|
||||
static A_Indices *
|
||||
_copyAIndices(A_Indices *from)
|
||||
{
|
||||
@ -3589,6 +3597,9 @@ copyObject(void *from)
|
||||
case T_FuncCall:
|
||||
retval = _copyFuncCall(from);
|
||||
break;
|
||||
case T_A_Star:
|
||||
retval = _copyAStar(from);
|
||||
break;
|
||||
case T_A_Indices:
|
||||
retval = _copyAIndices(from);
|
||||
break;
|
||||
|
||||
@ -22,7 +22,7 @@
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.329 2008/08/28 23:09:46 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.330 2008/08/30 01:39:13 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -1765,6 +1765,12 @@ _equalFuncCall(FuncCall *a, FuncCall *b)
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool
|
||||
_equalAStar(A_Star *a, A_Star *b)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool
|
||||
_equalAIndices(A_Indices *a, A_Indices *b)
|
||||
{
|
||||
@ -2531,6 +2537,9 @@ equal(void *a, void *b)
|
||||
case T_FuncCall:
|
||||
retval = _equalFuncCall(a, b);
|
||||
break;
|
||||
case T_A_Star:
|
||||
retval = _equalAStar(a, b);
|
||||
break;
|
||||
case T_A_Indices:
|
||||
retval = _equalAIndices(a, b);
|
||||
break;
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.336 2008/08/28 23:09:46 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.337 2008/08/30 01:39:14 tgl Exp $
|
||||
*
|
||||
* NOTES
|
||||
* Every node type that can appear in stored rules' parsetrees *must*
|
||||
@ -1989,6 +1989,12 @@ _outAConst(StringInfo str, A_Const *node)
|
||||
WRITE_LOCATION_FIELD(location);
|
||||
}
|
||||
|
||||
static void
|
||||
_outA_Star(StringInfo str, A_Star *node)
|
||||
{
|
||||
WRITE_NODE_TYPE("A_STAR");
|
||||
}
|
||||
|
||||
static void
|
||||
_outA_Indices(StringInfo str, A_Indices *node)
|
||||
{
|
||||
@ -2467,6 +2473,9 @@ _outNode(StringInfo str, void *obj)
|
||||
case T_A_Const:
|
||||
_outAConst(str, obj);
|
||||
break;
|
||||
case T_A_Star:
|
||||
_outA_Star(str, obj);
|
||||
break;
|
||||
case T_A_Indices:
|
||||
_outA_Indices(str, obj);
|
||||
break;
|
||||
|
||||
@ -11,7 +11,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.619 2008/08/28 23:09:47 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.620 2008/08/30 01:39:14 tgl Exp $
|
||||
*
|
||||
* HISTORY
|
||||
* AUTHOR DATE MAJOR EVENT
|
||||
@ -89,7 +89,7 @@ static bool QueryIsRule = FALSE;
|
||||
*/
|
||||
/*#define __YYSCLASS*/
|
||||
|
||||
static Node *makeColumnRef(char *relname, List *indirection, int location);
|
||||
static Node *makeColumnRef(char *colname, List *indirection, int location);
|
||||
static Node *makeTypeCast(Node *arg, TypeName *typename, int location);
|
||||
static Node *makeStringConst(char *str, int location);
|
||||
static Node *makeStringConstCast(char *str, int location, TypeName *typename);
|
||||
@ -102,6 +102,7 @@ static Node *makeBoolAConst(bool state, int location);
|
||||
static FuncCall *makeOverlaps(List *largs, List *rargs, int location);
|
||||
static void check_qualified_name(List *names);
|
||||
static List *check_func_name(List *names);
|
||||
static List *check_indirection(List *indirection);
|
||||
static List *extractArgTypes(List *parameters);
|
||||
static SelectStmt *findLeftmostSelect(SelectStmt *node);
|
||||
static void insertSelectOptions(SelectStmt *stmt,
|
||||
@ -5144,9 +5145,7 @@ UnlistenStmt:
|
||||
| UNLISTEN '*'
|
||||
{
|
||||
UnlistenStmt *n = makeNode(UnlistenStmt);
|
||||
n->relation = makeNode(RangeVar);
|
||||
n->relation->relname = "*";
|
||||
n->relation->schemaname = NULL;
|
||||
n->relation = NULL;
|
||||
$$ = (Node *)n;
|
||||
}
|
||||
;
|
||||
@ -5999,7 +5998,7 @@ insert_column_item:
|
||||
{
|
||||
$$ = makeNode(ResTarget);
|
||||
$$->name = $1;
|
||||
$$->indirection = $2;
|
||||
$$->indirection = check_indirection($2);
|
||||
$$->val = NULL;
|
||||
$$->location = @1;
|
||||
}
|
||||
@ -6138,7 +6137,7 @@ set_target:
|
||||
{
|
||||
$$ = makeNode(ResTarget);
|
||||
$$->name = $1;
|
||||
$$->indirection = $2;
|
||||
$$->indirection = check_indirection($2);
|
||||
$$->val = NULL; /* upper production sets this */
|
||||
$$->location = @1;
|
||||
}
|
||||
@ -7842,7 +7841,7 @@ c_expr: columnref { $$ = $1; }
|
||||
{
|
||||
A_Indirection *n = makeNode(A_Indirection);
|
||||
n->arg = (Node *) p;
|
||||
n->indirection = $2;
|
||||
n->indirection = check_indirection($2);
|
||||
$$ = (Node *) n;
|
||||
}
|
||||
else
|
||||
@ -7854,7 +7853,7 @@ c_expr: columnref { $$ = $1; }
|
||||
{
|
||||
A_Indirection *n = makeNode(A_Indirection);
|
||||
n->arg = $2;
|
||||
n->indirection = $4;
|
||||
n->indirection = check_indirection($4);
|
||||
$$ = (Node *)n;
|
||||
}
|
||||
else
|
||||
@ -8409,7 +8408,7 @@ xml_attribute_el: a_expr AS ColLabel
|
||||
{
|
||||
$$ = makeNode(ResTarget);
|
||||
$$->name = $3;
|
||||
$$->indirection = NULL;
|
||||
$$->indirection = NIL;
|
||||
$$->val = (Node *) $1;
|
||||
$$->location = @1;
|
||||
}
|
||||
@ -8417,7 +8416,7 @@ xml_attribute_el: a_expr AS ColLabel
|
||||
{
|
||||
$$ = makeNode(ResTarget);
|
||||
$$->name = NULL;
|
||||
$$->indirection = NULL;
|
||||
$$->indirection = NIL;
|
||||
$$->val = (Node *) $1;
|
||||
$$->location = @1;
|
||||
}
|
||||
@ -8724,7 +8723,7 @@ indirection_el:
|
||||
}
|
||||
| '.' '*'
|
||||
{
|
||||
$$ = (Node *) makeString("*");
|
||||
$$ = (Node *) makeNode(A_Star);
|
||||
}
|
||||
| '[' a_expr ']'
|
||||
{
|
||||
@ -8833,7 +8832,7 @@ target_el: a_expr AS ColLabel
|
||||
| '*'
|
||||
{
|
||||
ColumnRef *n = makeNode(ColumnRef);
|
||||
n->fields = list_make1(makeString("*"));
|
||||
n->fields = list_make1(makeNode(A_Star));
|
||||
n->location = @1;
|
||||
|
||||
$$ = makeNode(ResTarget);
|
||||
@ -9511,7 +9510,7 @@ SpecialRuleRelation:
|
||||
%%
|
||||
|
||||
static Node *
|
||||
makeColumnRef(char *relname, List *indirection, int location)
|
||||
makeColumnRef(char *colname, List *indirection, int location)
|
||||
{
|
||||
/*
|
||||
* Generate a ColumnRef node, with an A_Indirection node added if there
|
||||
@ -9533,23 +9532,30 @@ makeColumnRef(char *relname, List *indirection, int location)
|
||||
if (nfields == 0)
|
||||
{
|
||||
/* easy case - all indirection goes to A_Indirection */
|
||||
c->fields = list_make1(makeString(relname));
|
||||
i->indirection = indirection;
|
||||
c->fields = list_make1(makeString(colname));
|
||||
i->indirection = check_indirection(indirection);
|
||||
}
|
||||
else
|
||||
{
|
||||
/* got to split the list in two */
|
||||
i->indirection = list_copy_tail(indirection, nfields);
|
||||
i->indirection = check_indirection(list_copy_tail(indirection,
|
||||
nfields));
|
||||
indirection = list_truncate(indirection, nfields);
|
||||
c->fields = lcons(makeString(relname), indirection);
|
||||
c->fields = lcons(makeString(colname), indirection);
|
||||
}
|
||||
i->arg = (Node *) c;
|
||||
return (Node *) i;
|
||||
}
|
||||
else if (IsA(lfirst(l), A_Star))
|
||||
{
|
||||
/* We only allow '*' at the end of a ColumnRef */
|
||||
if (lnext(l) != NULL)
|
||||
yyerror("improper use of \"*\"");
|
||||
}
|
||||
nfields++;
|
||||
}
|
||||
/* No subscripting, so all indirection gets added to field list */
|
||||
c->fields = lcons(makeString(relname), indirection);
|
||||
c->fields = lcons(makeString(colname), indirection);
|
||||
return (Node *) c;
|
||||
}
|
||||
|
||||
@ -9712,8 +9718,6 @@ check_qualified_name(List *names)
|
||||
{
|
||||
if (!IsA(lfirst(i), String))
|
||||
yyerror("syntax error");
|
||||
else if (strcmp(strVal(lfirst(i)), "*") == 0)
|
||||
yyerror("syntax error");
|
||||
}
|
||||
}
|
||||
|
||||
@ -9731,12 +9735,31 @@ check_func_name(List *names)
|
||||
{
|
||||
if (!IsA(lfirst(i), String))
|
||||
yyerror("syntax error");
|
||||
else if (strcmp(strVal(lfirst(i)), "*") == 0)
|
||||
yyerror("syntax error");
|
||||
}
|
||||
return names;
|
||||
}
|
||||
|
||||
/* check_indirection --- check the result of indirection production
|
||||
*
|
||||
* We only allow '*' at the end of the list, but it's hard to enforce that
|
||||
* in the grammar, so do it here.
|
||||
*/
|
||||
static List *
|
||||
check_indirection(List *indirection)
|
||||
{
|
||||
ListCell *l;
|
||||
|
||||
foreach(l, indirection)
|
||||
{
|
||||
if (IsA(lfirst(l), A_Star))
|
||||
{
|
||||
if (lnext(l) != NULL)
|
||||
yyerror("improper use of \"*\"");
|
||||
}
|
||||
}
|
||||
return indirection;
|
||||
}
|
||||
|
||||
/* extractArgTypes()
|
||||
* Given a list of FunctionParameter nodes, extract a list of just the
|
||||
* argument types (TypeNames) for input parameters only. This is what
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/parser/parse_clause.c,v 1.177 2008/08/28 23:09:47 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/parser/parse_clause.c,v 1.178 2008/08/30 01:39:14 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -1181,7 +1181,8 @@ findTargetlistEntry(ParseState *pstate, Node *node, List **tlist, int clause)
|
||||
*----------
|
||||
*/
|
||||
if (IsA(node, ColumnRef) &&
|
||||
list_length(((ColumnRef *) node)->fields) == 1)
|
||||
list_length(((ColumnRef *) node)->fields) == 1 &&
|
||||
IsA(linitial(((ColumnRef *) node)->fields), String))
|
||||
{
|
||||
char *name = strVal(linitial(((ColumnRef *) node)->fields));
|
||||
int location = ((ColumnRef *) node)->location;
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/parser/parse_expr.c,v 1.232 2008/08/28 23:09:47 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/parser/parse_expr.c,v 1.233 2008/08/30 01:39:14 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -334,6 +334,13 @@ transformIndirection(ParseState *pstate, Node *basenode, List *indirection)
|
||||
|
||||
if (IsA(n, A_Indices))
|
||||
subscripts = lappend(subscripts, n);
|
||||
else if (IsA(n, A_Star))
|
||||
{
|
||||
ereport(ERROR,
|
||||
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
||||
errmsg("row expansion via \"*\" is not supported here"),
|
||||
parser_errposition(pstate, exprLocation(basenode))));
|
||||
}
|
||||
else
|
||||
{
|
||||
Assert(IsA(n, String));
|
||||
@ -403,10 +410,14 @@ transformColumnRef(ParseState *pstate, ColumnRef *cref)
|
||||
{
|
||||
case 1:
|
||||
{
|
||||
char *name = strVal(linitial(cref->fields));
|
||||
Node *field1 = (Node *) linitial(cref->fields);
|
||||
char *name1;
|
||||
|
||||
Assert(IsA(field1, String));
|
||||
name1 = strVal(field1);
|
||||
|
||||
/* Try to identify as an unqualified column */
|
||||
node = colNameToVar(pstate, name, false, cref->location);
|
||||
node = colNameToVar(pstate, name1, false, cref->location);
|
||||
|
||||
if (node == NULL)
|
||||
{
|
||||
@ -419,7 +430,7 @@ transformColumnRef(ParseState *pstate, ColumnRef *cref)
|
||||
* have used VALUE as a column name in the past.)
|
||||
*/
|
||||
if (pstate->p_value_substitute != NULL &&
|
||||
strcmp(name, "value") == 0)
|
||||
strcmp(name1, "value") == 0)
|
||||
{
|
||||
node = (Node *) copyObject(pstate->p_value_substitute);
|
||||
|
||||
@ -442,32 +453,40 @@ transformColumnRef(ParseState *pstate, ColumnRef *cref)
|
||||
* PostQUEL-inspired syntax. The preferred form now is
|
||||
* "rel.*".
|
||||
*/
|
||||
if (refnameRangeTblEntry(pstate, NULL, name,
|
||||
if (refnameRangeTblEntry(pstate, NULL, name1,
|
||||
&levels_up) != NULL)
|
||||
node = transformWholeRowRef(pstate, NULL, name,
|
||||
node = transformWholeRowRef(pstate, NULL, name1,
|
||||
cref->location);
|
||||
else
|
||||
ereport(ERROR,
|
||||
(errcode(ERRCODE_UNDEFINED_COLUMN),
|
||||
errmsg("column \"%s\" does not exist",
|
||||
name),
|
||||
name1),
|
||||
parser_errposition(pstate, cref->location)));
|
||||
}
|
||||
break;
|
||||
}
|
||||
case 2:
|
||||
{
|
||||
char *name1 = strVal(linitial(cref->fields));
|
||||
char *name2 = strVal(lsecond(cref->fields));
|
||||
Node *field1 = (Node *) linitial(cref->fields);
|
||||
Node *field2 = (Node *) lsecond(cref->fields);
|
||||
char *name1;
|
||||
char *name2;
|
||||
|
||||
Assert(IsA(field1, String));
|
||||
name1 = strVal(field1);
|
||||
|
||||
/* Whole-row reference? */
|
||||
if (strcmp(name2, "*") == 0)
|
||||
if (IsA(field2, A_Star))
|
||||
{
|
||||
node = transformWholeRowRef(pstate, NULL, name1,
|
||||
cref->location);
|
||||
break;
|
||||
}
|
||||
|
||||
Assert(IsA(field2, String));
|
||||
name2 = strVal(field2);
|
||||
|
||||
/* Try to identify as a once-qualified column */
|
||||
node = qualifiedNameToVar(pstate, NULL, name1, name2, true,
|
||||
cref->location);
|
||||
@ -490,18 +509,29 @@ transformColumnRef(ParseState *pstate, ColumnRef *cref)
|
||||
}
|
||||
case 3:
|
||||
{
|
||||
char *name1 = strVal(linitial(cref->fields));
|
||||
char *name2 = strVal(lsecond(cref->fields));
|
||||
char *name3 = strVal(lthird(cref->fields));
|
||||
Node *field1 = (Node *) linitial(cref->fields);
|
||||
Node *field2 = (Node *) lsecond(cref->fields);
|
||||
Node *field3 = (Node *) lthird(cref->fields);
|
||||
char *name1;
|
||||
char *name2;
|
||||
char *name3;
|
||||
|
||||
Assert(IsA(field1, String));
|
||||
name1 = strVal(field1);
|
||||
Assert(IsA(field2, String));
|
||||
name2 = strVal(field2);
|
||||
|
||||
/* Whole-row reference? */
|
||||
if (strcmp(name3, "*") == 0)
|
||||
if (IsA(field3, A_Star))
|
||||
{
|
||||
node = transformWholeRowRef(pstate, name1, name2,
|
||||
cref->location);
|
||||
break;
|
||||
}
|
||||
|
||||
Assert(IsA(field3, String));
|
||||
name3 = strVal(field3);
|
||||
|
||||
/* Try to identify as a twice-qualified column */
|
||||
node = qualifiedNameToVar(pstate, name1, name2, name3, true,
|
||||
cref->location);
|
||||
@ -520,10 +550,21 @@ transformColumnRef(ParseState *pstate, ColumnRef *cref)
|
||||
}
|
||||
case 4:
|
||||
{
|
||||
char *name1 = strVal(linitial(cref->fields));
|
||||
char *name2 = strVal(lsecond(cref->fields));
|
||||
char *name3 = strVal(lthird(cref->fields));
|
||||
char *name4 = strVal(lfourth(cref->fields));
|
||||
Node *field1 = (Node *) linitial(cref->fields);
|
||||
Node *field2 = (Node *) lsecond(cref->fields);
|
||||
Node *field3 = (Node *) lthird(cref->fields);
|
||||
Node *field4 = (Node *) lfourth(cref->fields);
|
||||
char *name1;
|
||||
char *name2;
|
||||
char *name3;
|
||||
char *name4;
|
||||
|
||||
Assert(IsA(field1, String));
|
||||
name1 = strVal(field1);
|
||||
Assert(IsA(field2, String));
|
||||
name2 = strVal(field2);
|
||||
Assert(IsA(field3, String));
|
||||
name3 = strVal(field3);
|
||||
|
||||
/*
|
||||
* We check the catalog name and then ignore it.
|
||||
@ -536,13 +577,16 @@ transformColumnRef(ParseState *pstate, ColumnRef *cref)
|
||||
parser_errposition(pstate, cref->location)));
|
||||
|
||||
/* Whole-row reference? */
|
||||
if (strcmp(name4, "*") == 0)
|
||||
if (IsA(field4, A_Star))
|
||||
{
|
||||
node = transformWholeRowRef(pstate, name2, name3,
|
||||
cref->location);
|
||||
break;
|
||||
}
|
||||
|
||||
Assert(IsA(field4, String));
|
||||
name4 = strVal(field4);
|
||||
|
||||
/* Try to identify as a twice-qualified column */
|
||||
node = qualifiedNameToVar(pstate, name2, name3, name4, true,
|
||||
cref->location);
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/parser/parse_target.c,v 1.162 2008/08/28 23:09:48 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/parser/parse_target.c,v 1.163 2008/08/30 01:39:14 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -109,14 +109,14 @@ transformTargetList(ParseState *pstate, List *targetlist)
|
||||
|
||||
/*
|
||||
* Check for "something.*". Depending on the complexity of the
|
||||
* "something", the star could appear as the last name in ColumnRef,
|
||||
* "something", the star could appear as the last field in ColumnRef,
|
||||
* or as the last indirection item in A_Indirection.
|
||||
*/
|
||||
if (IsA(res->val, ColumnRef))
|
||||
{
|
||||
ColumnRef *cref = (ColumnRef *) res->val;
|
||||
|
||||
if (strcmp(strVal(llast(cref->fields)), "*") == 0)
|
||||
if (IsA(llast(cref->fields), A_Star))
|
||||
{
|
||||
/* It is something.*, expand into multiple items */
|
||||
p_target = list_concat(p_target,
|
||||
@ -128,10 +128,8 @@ transformTargetList(ParseState *pstate, List *targetlist)
|
||||
else if (IsA(res->val, A_Indirection))
|
||||
{
|
||||
A_Indirection *ind = (A_Indirection *) res->val;
|
||||
Node *lastitem = llast(ind->indirection);
|
||||
|
||||
if (IsA(lastitem, String) &&
|
||||
strcmp(strVal(lastitem), "*") == 0)
|
||||
if (IsA(llast(ind->indirection), A_Star))
|
||||
{
|
||||
/* It is something.*, expand into multiple items */
|
||||
p_target = list_concat(p_target,
|
||||
@ -176,14 +174,14 @@ transformExpressionList(ParseState *pstate, List *exprlist)
|
||||
|
||||
/*
|
||||
* Check for "something.*". Depending on the complexity of the
|
||||
* "something", the star could appear as the last name in ColumnRef,
|
||||
* "something", the star could appear as the last field in ColumnRef,
|
||||
* or as the last indirection item in A_Indirection.
|
||||
*/
|
||||
if (IsA(e, ColumnRef))
|
||||
{
|
||||
ColumnRef *cref = (ColumnRef *) e;
|
||||
|
||||
if (strcmp(strVal(llast(cref->fields)), "*") == 0)
|
||||
if (IsA(llast(cref->fields), A_Star))
|
||||
{
|
||||
/* It is something.*, expand into multiple items */
|
||||
result = list_concat(result,
|
||||
@ -195,10 +193,8 @@ transformExpressionList(ParseState *pstate, List *exprlist)
|
||||
else if (IsA(e, A_Indirection))
|
||||
{
|
||||
A_Indirection *ind = (A_Indirection *) e;
|
||||
Node *lastitem = llast(ind->indirection);
|
||||
|
||||
if (IsA(lastitem, String) &&
|
||||
strcmp(strVal(lastitem), "*") == 0)
|
||||
if (IsA(llast(ind->indirection), A_Star))
|
||||
{
|
||||
/* It is something.*, expand into multiple items */
|
||||
result = list_concat(result,
|
||||
@ -560,6 +556,13 @@ transformAssignmentIndirection(ParseState *pstate,
|
||||
if (((A_Indices *) n)->lidx != NULL)
|
||||
isSlice = true;
|
||||
}
|
||||
else if (IsA(n, A_Star))
|
||||
{
|
||||
ereport(ERROR,
|
||||
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
||||
errmsg("row expansion via \"*\" is not supported here"),
|
||||
parser_errposition(pstate, location)));
|
||||
}
|
||||
else
|
||||
{
|
||||
FieldStore *fstore;
|
||||
@ -809,7 +812,7 @@ checkInsertTargets(ParseState *pstate, List *cols, List **attrnos)
|
||||
* ExpandColumnRefStar()
|
||||
* Transforms foo.* into a list of expressions or targetlist entries.
|
||||
*
|
||||
* This handles the case where '*' appears as the last or only name in a
|
||||
* This handles the case where '*' appears as the last or only item in a
|
||||
* ColumnRef. The code is shared between the case of foo.* at the top level
|
||||
* in a SELECT target list (where we want TargetEntry nodes in the result)
|
||||
* and foo.* in a ROW() or VALUES() construct (where we want just bare
|
||||
@ -830,13 +833,9 @@ ExpandColumnRefStar(ParseState *pstate, ColumnRef *cref,
|
||||
* (e.g., SELECT * FROM emp, dept)
|
||||
*
|
||||
* Since the grammar only accepts bare '*' at top level of SELECT, we
|
||||
* need not handle the targetlist==false case here. However, we must
|
||||
* test for it because the grammar currently fails to distinguish a
|
||||
* quoted name "*" from a real asterisk.
|
||||
* need not handle the targetlist==false case here.
|
||||
*/
|
||||
if (!targetlist)
|
||||
elog(ERROR, "invalid use of *");
|
||||
|
||||
Assert(targetlist);
|
||||
return ExpandAllTables(pstate);
|
||||
}
|
||||
else
|
||||
@ -1226,7 +1225,7 @@ FigureColnameInternal(Node *node, char **name)
|
||||
{
|
||||
Node *i = lfirst(l);
|
||||
|
||||
if (strcmp(strVal(i), "*") != 0)
|
||||
if (IsA(i, String))
|
||||
fname = strVal(i);
|
||||
}
|
||||
if (fname)
|
||||
@ -1242,13 +1241,12 @@ FigureColnameInternal(Node *node, char **name)
|
||||
char *fname = NULL;
|
||||
ListCell *l;
|
||||
|
||||
/* find last field name, if any, ignoring "*" */
|
||||
/* find last field name, if any, ignoring "*" and subscripts */
|
||||
foreach(l, ind->indirection)
|
||||
{
|
||||
Node *i = lfirst(l);
|
||||
|
||||
if (IsA(i, String) &&
|
||||
strcmp(strVal(i), "*") != 0)
|
||||
if (IsA(i, String))
|
||||
fname = strVal(i);
|
||||
}
|
||||
if (fname)
|
||||
|
||||
@ -8,7 +8,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/parser/parse_type.c,v 1.97 2008/04/29 20:44:49 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/parser/parse_type.c,v 1.98 2008/08/30 01:39:14 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -305,7 +305,8 @@ typenameTypeMod(ParseState *pstate, const TypeName *typename, Type typ)
|
||||
{
|
||||
ColumnRef *cr = (ColumnRef *) tm;
|
||||
|
||||
if (list_length(cr->fields) == 1)
|
||||
if (list_length(cr->fields) == 1 &&
|
||||
IsA(linitial(cr->fields), String))
|
||||
cstr = strVal(linitial(cr->fields));
|
||||
}
|
||||
if (!cstr)
|
||||
|
||||
@ -10,7 +10,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/tcop/utility.c,v 1.296 2008/08/13 00:07:50 alvherre Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/tcop/utility.c,v 1.297 2008/08/30 01:39:14 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -817,7 +817,10 @@ ProcessUtility(Node *parsetree,
|
||||
{
|
||||
UnlistenStmt *stmt = (UnlistenStmt *) parsetree;
|
||||
|
||||
Async_Unlisten(stmt->relation->relname);
|
||||
if (stmt->relation)
|
||||
Async_Unlisten(stmt->relation->relname);
|
||||
else
|
||||
Async_UnlistenAll();
|
||||
}
|
||||
break;
|
||||
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/nodes/nodes.h,v 1.210 2008/08/29 22:49:07 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/include/nodes/nodes.h,v 1.211 2008/08/30 01:39:14 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -324,6 +324,7 @@ typedef enum NodeTag
|
||||
T_ParamRef,
|
||||
T_A_Const,
|
||||
T_FuncCall,
|
||||
T_A_Star,
|
||||
T_A_Indices,
|
||||
T_A_Indirection,
|
||||
T_A_ArrayExpr,
|
||||
|
||||
@ -13,7 +13,7 @@
|
||||
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.372 2008/08/28 23:09:48 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.373 2008/08/30 01:39:14 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -178,8 +178,10 @@ typedef struct TypeName
|
||||
/*
|
||||
* ColumnRef - specifies a reference to a column, or possibly a whole tuple
|
||||
*
|
||||
* The "fields" list must be nonempty; its last component may be "*"
|
||||
* instead of a regular field name.
|
||||
* The "fields" list must be nonempty. It can contain string Value nodes
|
||||
* (representing names) and A_Star nodes (representing occurrence of a '*').
|
||||
* Currently, A_Star must appear only as the last list element --- the grammar
|
||||
* is responsible for enforcing this!
|
||||
*
|
||||
* Note: any array subscripting or selection of fields from composite columns
|
||||
* is represented by an A_Indirection node above the ColumnRef. However,
|
||||
@ -189,7 +191,7 @@ typedef struct TypeName
|
||||
typedef struct ColumnRef
|
||||
{
|
||||
NodeTag type;
|
||||
List *fields; /* field names (list of Value strings) */
|
||||
List *fields; /* field names (Value strings) or A_Star */
|
||||
int location; /* token location, or -1 if unknown */
|
||||
} ColumnRef;
|
||||
|
||||
@ -271,35 +273,46 @@ typedef struct FuncCall
|
||||
} FuncCall;
|
||||
|
||||
/*
|
||||
* A_Indices - array reference or bounds ([lidx:uidx] or [uidx])
|
||||
* A_Star - '*' representing all columns of a table or compound field
|
||||
*
|
||||
* This can appear within ColumnRef.fields, A_Indirection.indirection, and
|
||||
* ResTarget.indirection lists.
|
||||
*/
|
||||
typedef struct A_Star
|
||||
{
|
||||
NodeTag type;
|
||||
} A_Star;
|
||||
|
||||
/*
|
||||
* A_Indices - array subscript or slice bounds ([lidx:uidx] or [uidx])
|
||||
*/
|
||||
typedef struct A_Indices
|
||||
{
|
||||
NodeTag type;
|
||||
Node *lidx; /* could be NULL */
|
||||
Node *lidx; /* NULL if it's a single subscript */
|
||||
Node *uidx;
|
||||
} A_Indices;
|
||||
|
||||
/*
|
||||
* A_Indirection - select a field and/or array element from an expression
|
||||
*
|
||||
* The indirection list can contain both A_Indices nodes (representing
|
||||
* subscripting) and string Value nodes (representing field selection
|
||||
* --- the string value is the name of the field to select). For example,
|
||||
* a complex selection operation like
|
||||
* The indirection list can contain A_Indices nodes (representing
|
||||
* subscripting), string Value nodes (representing field selection --- the
|
||||
* string value is the name of the field to select), and A_Star nodes
|
||||
* (representing selection of all fields of a composite type).
|
||||
* For example, a complex selection operation like
|
||||
* (foo).field1[42][7].field2
|
||||
* would be represented with a single A_Indirection node having a 4-element
|
||||
* indirection list.
|
||||
*
|
||||
* Note: as of Postgres 8.0, we don't support arrays of composite values,
|
||||
* so cases in which a field select follows a subscript aren't actually
|
||||
* semantically legal. However the parser is prepared to handle such.
|
||||
* Currently, A_Star must appear only as the last list element --- the grammar
|
||||
* is responsible for enforcing this!
|
||||
*/
|
||||
typedef struct A_Indirection
|
||||
{
|
||||
NodeTag type;
|
||||
Node *arg; /* the thing being selected from */
|
||||
List *indirection; /* subscripts and/or field names */
|
||||
List *indirection; /* subscripts and/or field names and/or * */
|
||||
} A_Indirection;
|
||||
|
||||
/*
|
||||
@ -334,7 +347,7 @@ typedef struct ResTarget
|
||||
{
|
||||
NodeTag type;
|
||||
char *name; /* column name or NULL */
|
||||
List *indirection; /* subscripts and field names, or NIL */
|
||||
List *indirection; /* subscripts, field names, and '*', or NIL */
|
||||
Node *val; /* the value expression to compute or assign */
|
||||
int location; /* token location, or -1 if unknown */
|
||||
} ResTarget;
|
||||
@ -1739,7 +1752,7 @@ typedef struct NotifyStmt
|
||||
typedef struct ListenStmt
|
||||
{
|
||||
NodeTag type;
|
||||
RangeVar *relation; /* qualified name to listen on */
|
||||
RangeVar *relation; /* name to listen on */
|
||||
} ListenStmt;
|
||||
|
||||
/* ----------------------
|
||||
@ -1749,7 +1762,7 @@ typedef struct ListenStmt
|
||||
typedef struct UnlistenStmt
|
||||
{
|
||||
NodeTag type;
|
||||
RangeVar *relation; /* qualified name to unlisten on, or '*' */
|
||||
RangeVar *relation; /* name to unlisten on, or NULL for all */
|
||||
} UnlistenStmt;
|
||||
|
||||
/* ----------------------
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user