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Make sure resdomno for update/insert match attribute number for 

rewrite system.  Restructure parse_target to make it easier to
understand.
This commit is contained in:
Bruce Momjian 1998-08-25 03:17:29 +00:00
parent a06ba33cfd
commit 0fc13f582a
3 changed files with 227 additions and 196 deletions
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8
src/backend/parser/parse_clause.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_clause.c,v 1.23 1998/08/05 04:49:09 scrappy Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_clause.c,v 1.24 1998/08/25 03:17:26 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -272,14 +272,14 @@ findTargetlistEntry(ParseState *pstate, Node *node, List *tlist, int clause)
switch(nodeTag(node))
{
case T_Attr:
target_result = transformTargetIdent(pstate, node, makeNode(TargetEntry),
target_result = MakeTargetEntryIdent(pstate, node,
&((Attr*)node)->relname, NULL,
((Attr*)node)->relname, TRUE);
lappend(tlist, target_result);
break;
case T_Ident:
target_result = transformTargetIdent(pstate, node, makeNode(TargetEntry),
target_result = MakeTargetEntryIdent(pstate, node,
&((Ident*)node)->name, NULL,
((Ident*)node)->name, TRUE);
lappend(tlist, target_result);
@ -294,7 +294,7 @@ findTargetlistEntry(ParseState *pstate, Node *node, List *tlist, int clause)
case T_FuncCall:
case T_A_Expr:
target_result = MakeTargetlistExpr(pstate, "resjunk", expr, FALSE, TRUE);
target_result = MakeTargetEntryExpr(pstate, "resjunk", expr, FALSE, TRUE);
lappend(tlist, target_result);
break;

408
src/backend/parser/parse_target.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.22 1998/08/23 14:43:46 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_target.c,v 1.23 1998/08/25 03:17:28 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -40,7 +40,7 @@ SizeTargetExpr(ParseState *pstate,
int32 attrtypmod);
/* transformTargetIdent()
/* MakeTargetEntryIdent()
* Transforms an Ident Node to a Target Entry
* Created this function to allow the ORDER/GROUP BY clause to be able
* to construct a TargetEntry from an Ident.
@ -52,13 +52,12 @@ SizeTargetExpr(ParseState *pstate,
* - thomas 1998-06-02
*/
TargetEntry *
transformTargetIdent(ParseState *pstate,
MakeTargetEntryIdent(ParseState *pstate,
#if FALSE
Ident *ident,
#else
Node *node,
#endif
TargetEntry *tent,
char **resname,
char *refname,
char *colname,
@ -66,7 +65,7 @@ transformTargetIdent(ParseState *pstate,
{
Node *expr = NULL;
Oid attrtype_target;
TargetEntry *tent = makeNode(TargetEntry);
if (pstate->p_is_insert)
{
@ -93,6 +92,7 @@ transformTargetIdent(ParseState *pstate,
target_colname = *resname;
/* this looks strange to me, returning an empty TargetEntry bjm 1998/08/24 */
if (target_colname == NULL || colname == NULL)
return (tent);
@ -115,7 +115,7 @@ transformTargetIdent(ParseState *pstate,
attrtypmod_target = get_atttypmod(pstate->p_target_relation->rd_id, resdomno_target);
#ifdef PARSEDEBUG
printf("transformTargetIdent- transform type %d to %d\n",
printf("MakeTargetEntryIdent- transform type %d to %d\n",
attrtype_id, attrtype_target);
#endif
if ((attrtype_id != attrtype_target)
@ -125,7 +125,7 @@ printf("transformTargetIdent- transform type %d to %d\n",
{
expr = coerce_type(pstate, node, attrtype_id, attrtype_target);
expr = transformExpr(pstate, expr, EXPR_COLUMN_FIRST);
tent = MakeTargetlistExpr(pstate, *resname, expr, FALSE, FALSE);
tent = MakeTargetEntryExpr(pstate, *resname, expr, FALSE, FALSE);
expr = tent->expr;
}
else
@ -155,7 +155,7 @@ printf("transformTargetIdent- transform type %d to %d\n",
name = ((*resname != NULL)? *resname: colname);
#ifdef PARSEDEBUG
printf("transformTargetIdent- call transformIdent()\n");
printf("MakeTargetEntryIdent- call transformIdent()\n");
#endif
#if FALSE
expr = transformIdent(pstate, (Node *) ident, EXPR_COLUMN_FIRST);
@ -170,7 +170,7 @@ printf("transformTargetIdent- call transformIdent()\n");
type_mod = -1;
#ifdef PARSEDEBUG
printf("transformTargetIdent- attrtype_target = %d; type_mod = %d\n", attrtype_target, type_mod);
printf("MakeTargetEntryIdent- attrtype_target = %d; type_mod = %d\n", attrtype_target, type_mod);
#endif
tent->resdom = makeResdom((AttrNumber) pstate->p_last_resno++,
@ -184,10 +184,10 @@ printf("transformTargetIdent- attrtype_target = %d; type_mod = %d\n", attrtype_t
}
return (tent);
} /* transformTargetIdent() */
} /* MakeTargetEntryIdent() */
/* MakeTargetlistExpr()
/* MakeTargetEntryExpr()
* Make a TargetEntry from an expression.
* arrayRef is a list of transformed A_Indices.
*
@ -200,7 +200,7 @@ printf("transformTargetIdent- attrtype_target = %d; type_mod = %d\n", attrtype_t
* - daveh@insightdist.com 1998-07-31
*/
TargetEntry *
MakeTargetlistExpr(ParseState *pstate,
MakeTargetEntryExpr(ParseState *pstate,
char *colname,
Node *expr,
List *arrayRef,
@ -213,11 +213,10 @@ MakeTargetlistExpr(ParseState *pstate,
int resdomno;
Relation rd;
bool attrisset;
TargetEntry *tent;
Resdom *resnode;
if (expr == NULL)
elog(ERROR, "MakeTargetlistExpr: invalid use of NULL expression");
elog(ERROR, "MakeTargetEntryExpr: invalid use of NULL expression");
type_id = exprType(expr);
if (nodeTag(expr) == T_Var)
@ -225,7 +224,7 @@ MakeTargetlistExpr(ParseState *pstate,
else
type_mod = -1;
/* Processes target columns that will be receiving results */
/* Process target columns that will be receiving results */
if (pstate->p_is_insert || pstate->p_is_update)
{
/*
@ -266,7 +265,7 @@ MakeTargetlistExpr(ParseState *pstate,
}
#ifdef PARSEDEBUG
printf("MakeTargetlistExpr: attrtypmod is %d\n", (int4) attrtypmod);
printf("MakeTargetEntryExpr: attrtypmod is %d\n", (int4) attrtypmod);
#endif
/* Apparently going to a fixed-length string?
@ -329,12 +328,199 @@ printf("MakeTargetlistExpr: attrtypmod is %d\n", (int4) attrtypmod);
(Oid) 0,
resjunk);
tent = makeTargetEntry(resnode, expr);
return makeTargetEntry(resnode, expr);
} /* MakeTargetEntryExpr() */
/*
* MakeTargetlistComplex()
* pMake a TargetEntry from an complex node.
*/
static TargetEntry *
MakeTargetEntryComplex(ParseState *pstate,
ResTarget *res)
{
Node *expr = transformExpr(pstate, (Node *) res->val, EXPR_COLUMN_FIRST);
#ifdef PARSEDEBUG
printf("transformTargetList: decode T_Expr\n");
#endif
handleTargetColname(pstate, &res->name, NULL, NULL);
/* note indirection has not been transformed */
if (pstate->p_is_insert && res->indirection != NIL)
{
/* this is an array assignment */
char *val;
char *str,
*save_str;
List *elt;
int i = 0,
ndims;
int lindx[MAXDIM],
uindx[MAXDIM];
int resdomno;
Relation rd;
Value *constval;
if (exprType(expr) != UNKNOWNOID || !IsA(expr, Const))
elog(ERROR, "yyparse: string constant expected");
val = (char *) textout((struct varlena *)
((Const *) expr)->constvalue);
str = save_str = (char *) palloc(strlen(val) + MAXDIM * 25 + 2);
foreach(elt, res->indirection)
{
A_Indices *aind = (A_Indices *) lfirst(elt);
aind->uidx = transformExpr(pstate, aind->uidx, EXPR_COLUMN_FIRST);
if (!IsA(aind->uidx, Const))
elog(ERROR, "Array Index for Append should be a constant");
uindx[i] = ((Const *) aind->uidx)->constvalue;
if (aind->lidx != NULL)
{
aind->lidx = transformExpr(pstate, aind->lidx, EXPR_COLUMN_FIRST);
if (!IsA(aind->lidx, Const))
elog(ERROR, "Array Index for Append should be a constant");
lindx[i] = ((Const *) aind->lidx)->constvalue;
}
else
lindx[i] = 1;
if (lindx[i] > uindx[i])
elog(ERROR, "yyparse: lower index cannot be greater than upper index");
sprintf(str, "[%d:%d]", lindx[i], uindx[i]);
str += strlen(str);
i++;
}
sprintf(str, "=%s", val);
rd = pstate->p_target_relation;
Assert(rd != NULL);
resdomno = attnameAttNum(rd, res->name);
ndims = attnumAttNelems(rd, resdomno);
if (i != ndims)
elog(ERROR, "yyparse: array dimensions do not match");
constval = makeNode(Value);
constval->type = T_String;
constval->val.str = save_str;
return MakeTargetEntryExpr(pstate, res->name,
(Node *) make_const(constval),
NULL, FALSE);
pfree(save_str);
}
else
{
char *colname = res->name;
/* this is not an array assignment */
if (colname == NULL)
{
/*
* if you're wondering why this is here, look
* at the yacc grammar for why a name can be
* missing. -ay
*/
colname = FigureColname(expr, res->val);
}
if (res->indirection)
{
List *ilist = res->indirection;
while (ilist != NIL)
{
A_Indices *ind = lfirst(ilist);
ind->lidx = transformExpr(pstate, ind->lidx, EXPR_COLUMN_FIRST);
ind->uidx = transformExpr(pstate, ind->uidx, EXPR_COLUMN_FIRST);
ilist = lnext(ilist);
}
}
res->name = colname;
return MakeTargetEntryExpr(pstate, res->name, expr,
res->indirection, FALSE);
}
}
/*
* MakeTargetlistComplex()
* pMake a TargetEntry from an complex node.
*/
static TargetEntry *
MakeTargetEntryAttr(ParseState *pstate,
ResTarget *res)
{
Oid type_id;
int32 type_mod;
Attr *att = (Attr *) res->val;
Node *result;
char *attrname;
char *resname;
Resdom *resnode;
int resdomno;
List *attrs = att->attrs;
TargetEntry *tent;
Oid relid;
attrname = strVal(lfirst(att->attrs));
/*
* Target item is fully specified: ie.
* relation.attribute
*/
#ifdef PARSEDEBUG
printf("transformTargetList: decode T_Attr\n");
#endif
result = ParseNestedFuncOrColumn(pstate, att, &pstate->p_last_resno, EXPR_COLUMN_FIRST);
handleTargetColname(pstate, &res->name, att->relname, attrname);
if (att->indirection != NIL)
{
List *ilist = att->indirection;
while (ilist != NIL)
{
A_Indices *ind = lfirst(ilist);
ind->lidx = transformExpr(pstate, ind->lidx, EXPR_COLUMN_FIRST);
ind->uidx = transformExpr(pstate, ind->uidx, EXPR_COLUMN_FIRST);
ilist = lnext(ilist);
}
result = (Node *) make_array_ref(result, att->indirection);
}
type_id = exprType(result);
if (nodeTag(result) == T_Var)
type_mod = ((Var *) result)->vartypmod;
else
type_mod = -1;
/* move to last entry */
while (lnext(attrs) != NIL)
attrs = lnext(attrs);
resname = (res->name) ? res->name : strVal(lfirst(attrs));
if (pstate->p_is_insert || pstate->p_is_update)
{
/*
* insert or update query -- insert, update work only on one
* relation, so multiple occurence of same resdomno is bogus
*/
relid = refnameRangeTableEntry(pstate, att->relname)->relid;
resdomno = get_attnum(relid, attrname);
}
else
resdomno = pstate->p_last_resno++;
resnode = makeResdom((AttrNumber) resdomno,
(Oid) type_id,
type_mod,
resname,
(Index) 0,
(Oid) 0,
0);
tent = makeNode(TargetEntry);
tent->resdom = resnode;
tent->expr = result;
return tent;
} /* MakeTargetlistExpr() */
}
/* transformTargetList()
* Turns a list of ResTarget's into a list of TargetEntry's.
*/
@ -347,22 +533,19 @@ transformTargetList(ParseState *pstate, List *targetlist)
while (targetlist != NIL)
{
ResTarget *res = (ResTarget *) lfirst(targetlist);
TargetEntry *tent = makeNode(TargetEntry);
TargetEntry *tent = NULL;
switch (nodeTag(res->val))
{
case T_Ident:
{
char *identname;
#if FALSE
char *resname;
#endif
#ifdef PARSEDEBUG
printf("transformTargetList: decode T_Ident\n");
#endif
identname = ((Ident *) res->val)->name;
tent = transformTargetIdent(pstate, (Node *)res->val, tent, &res->name, NULL, identname, FALSE);
tent = MakeTargetEntryIdent(pstate, (Node *)res->val, &res->name, NULL, identname, FALSE);
break;
}
case T_ParamNo:
@ -370,120 +553,14 @@ printf("transformTargetList: decode T_Ident\n");
case T_A_Const:
case T_A_Expr:
{
Node *expr = transformExpr(pstate, (Node *) res->val, EXPR_COLUMN_FIRST);
#ifdef PARSEDEBUG
printf("transformTargetList: decode T_Expr\n");
#endif
handleTargetColname(pstate, &res->name, NULL, NULL);
/* note indirection has not been transformed */
if (pstate->p_is_insert && res->indirection != NIL)
{
/* this is an array assignment */
char *val;
char *str,
*save_str;
List *elt;
int i = 0,
ndims;
int lindx[MAXDIM],
uindx[MAXDIM];
int resdomno;
Relation rd;
Value *constval;
if (exprType(expr) != UNKNOWNOID || !IsA(expr, Const))
elog(ERROR, "yyparse: string constant expected");
val = (char *) textout((struct varlena *)
((Const *) expr)->constvalue);
str = save_str = (char *) palloc(strlen(val) + MAXDIM * 25 + 2);
foreach(elt, res->indirection)
{
A_Indices *aind = (A_Indices *) lfirst(elt);
aind->uidx = transformExpr(pstate, aind->uidx, EXPR_COLUMN_FIRST);
if (!IsA(aind->uidx, Const))
elog(ERROR, "Array Index for Append should be a constant");
uindx[i] = ((Const *) aind->uidx)->constvalue;
if (aind->lidx != NULL)
{
aind->lidx = transformExpr(pstate, aind->lidx, EXPR_COLUMN_FIRST);
if (!IsA(aind->lidx, Const))
elog(ERROR, "Array Index for Append should be a constant");
lindx[i] = ((Const *) aind->lidx)->constvalue;
}
else
lindx[i] = 1;
if (lindx[i] > uindx[i])
elog(ERROR, "yyparse: lower index cannot be greater than upper index");
sprintf(str, "[%d:%d]", lindx[i], uindx[i]);
str += strlen(str);
i++;
}
sprintf(str, "=%s", val);
rd = pstate->p_target_relation;
Assert(rd != NULL);
resdomno = attnameAttNum(rd, res->name);
ndims = attnumAttNelems(rd, resdomno);
if (i != ndims)
elog(ERROR, "yyparse: array dimensions do not match");
constval = makeNode(Value);
constval->type = T_String;
constval->val.str = save_str;
tent = MakeTargetlistExpr(pstate, res->name,
(Node *) make_const(constval),
NULL, FALSE);
pfree(save_str);
}
else
{
char *colname = res->name;
/* this is not an array assignment */
if (colname == NULL)
{
/*
* if you're wondering why this is here, look
* at the yacc grammar for why a name can be
* missing. -ay
*/
colname = FigureColname(expr, res->val);
}
if (res->indirection)
{
List *ilist = res->indirection;
while (ilist != NIL)
{
A_Indices *ind = lfirst(ilist);
ind->lidx = transformExpr(pstate, ind->lidx, EXPR_COLUMN_FIRST);
ind->uidx = transformExpr(pstate, ind->uidx, EXPR_COLUMN_FIRST);
ilist = lnext(ilist);
}
}
res->name = colname;
tent = MakeTargetlistExpr(pstate, res->name, expr,
res->indirection, FALSE);
}
tent = MakeTargetEntryComplex(pstate, res);
break;
}
case T_Attr:
{
Oid type_id;
int32 type_mod;
Attr *att = (Attr *) res->val;
Node *result;
bool expand_star = false;
char *attrname;
char *resname;
Resdom *resnode;
List *attrs = att->attrs;
Attr *att = (Attr *) res->val;
/*
* Target item is a single '*', expand all tables (eg.
* SELECT * FROM emp)
@ -494,16 +571,7 @@ printf("transformTargetList: decode T_Expr\n");
p_target = tail_p_target = ExpandAllTables(pstate);
else
lnext(tail_p_target) = ExpandAllTables(pstate);
while (lnext(tail_p_target) != NIL)
/* make sure we point to the last target entry */
tail_p_target = lnext(tail_p_target);
/*
* skip rest of while loop
*/
targetlist = lnext(targetlist);
continue;
expand_star = true;
}
/*
@ -526,60 +594,24 @@ printf("transformTargetList: decode T_Expr\n");
lnext(tail_p_target) =
expandAll(pstate, att->relname, att->relname,
&pstate->p_last_resno);
expand_star = true;
}
if (expand_star)
{
while (lnext(tail_p_target) != NIL)
/* make sure we point to the last target entry */
tail_p_target = lnext(tail_p_target);
/*
* skip the rest of the while loop
* skip rest of while loop
*/
targetlist = lnext(targetlist);
continue;
}
/*
* Target item is fully specified: ie.
* relation.attribute
*/
#ifdef PARSEDEBUG
printf("transformTargetList: decode T_Attr\n");
#endif
result = ParseNestedFuncOrColumn(pstate, att, &pstate->p_last_resno, EXPR_COLUMN_FIRST);
handleTargetColname(pstate, &res->name, att->relname, attrname);
if (att->indirection != NIL)
{
List *ilist = att->indirection;
while (ilist != NIL)
{
A_Indices *ind = lfirst(ilist);
ind->lidx = transformExpr(pstate, ind->lidx, EXPR_COLUMN_FIRST);
ind->uidx = transformExpr(pstate, ind->uidx, EXPR_COLUMN_FIRST);
ilist = lnext(ilist);
}
result = (Node *) make_array_ref(result, att->indirection);
}
type_id = exprType(result);
if (nodeTag(result) == T_Var)
type_mod = ((Var *) result)->vartypmod;
else
type_mod = -1;
/* move to last entry */
while (lnext(attrs) != NIL)
attrs = lnext(attrs);
resname = (res->name) ? res->name : strVal(lfirst(attrs));
resnode = makeResdom((AttrNumber) pstate->p_last_resno++,
(Oid) type_id,
type_mod,
resname,
(Index) 0,
(Oid) 0,
0);
tent->resdom = resnode;
tent->expr = result;
break;
{
tent = MakeTargetEntryAttr(pstate, res);
break;
}
}
default:
/* internal error */

7
src/include/parser/parse_target.h
View File

@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: parse_target.h,v 1.9 1998/08/05 04:49:15 scrappy Exp $
* $Id: parse_target.h,v 1.10 1998/08/25 03:17:29 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -25,9 +25,8 @@
extern List *transformTargetList(ParseState *pstate, List *targetlist);
extern List *makeTargetNames(ParseState *pstate, List *cols);
extern TargetEntry *
transformTargetIdent(ParseState *pstate,
MakeTargetEntryIdent(ParseState *pstate,
Node *node,
TargetEntry *tent,
char **resname,
char *refname,
char *colname,
@ -35,7 +34,7 @@ transformTargetIdent(ParseState *pstate,
extern Node *
CoerceTargetExpr(ParseState *pstate, Node *expr,
Oid type_id, Oid attrtype);
TargetEntry * MakeTargetlistExpr(ParseState *pstate,
TargetEntry * MakeTargetEntryExpr(ParseState *pstate,
char *colname,
Node *expr,
List *arrayRef,