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Add support for multi-row VALUES clauses as part of INSERT statements

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(e.g. "INSERT ... VALUES (...), (...), ...") and elsewhere as allowed
by the spec. (e.g. similar to a FROM clause subselect). initdb required.
Joe Conway and Tom Lane.
This commit is contained in:
Joe Conway
2006-08-02 01:59:48 +00:00
parent d307c428cb
commit 9caafda579
40 changed files with 1877 additions and 313 deletions
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60
src/backend/parser/parse_expr.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/parse_expr.c,v 1.195 2006/07/14 14:52:22 momjian Exp $
* $PostgreSQL: pgsql/src/backend/parser/parse_expr.c,v 1.196 2006/08/02 01:59:46 joe Exp $
*
*-------------------------------------------------------------------------
*/
@ -1281,56 +1281,9 @@ static Node *
transformRowExpr(ParseState *pstate, RowExpr *r)
{
RowExpr *newr = makeNode(RowExpr);
List *newargs = NIL;
ListCell *arg;
/* Transform the field expressions */
foreach(arg, r->args)
{
Node *e = (Node *) lfirst(arg);
Node *newe;
/*
* Check for "something.*". Depending on the complexity of the
* "something", the star could appear as the last name 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)
{
/* It is something.*, expand into multiple items */
newargs = list_concat(newargs,
ExpandColumnRefStar(pstate, cref,
false));
continue;
}
}
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)
{
/* It is something.*, expand into multiple items */
newargs = list_concat(newargs,
ExpandIndirectionStar(pstate, ind,
false));
continue;
}
}
/*
* Not "something.*", so transform as a single expression
*/
newe = transformExpr(pstate, e);
newargs = lappend(newargs, newe);
}
newr->args = newargs;
newr->args = transformExpressionList(pstate, r->args);
/* Barring later casting, we consider the type RECORD */
newr->row_typeid = RECORDOID;
@ -1526,6 +1479,15 @@ transformWholeRowRef(ParseState *pstate, char *schemaname, char *relname,
sublevels_up);
}
break;
case RTE_VALUES:
toid = RECORDOID;
/* returns composite; same as relation case */
result = (Node *) makeVar(vnum,
InvalidAttrNumber,
toid,
-1,
sublevels_up);
break;
default:
/*