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Support assignment to subfields of composite columns in UPDATE and INSERT.

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As a side effect, cause subscripts in INSERT targetlists to do something
more or less sensible; previously we evaluated such subscripts and then
effectively ignored them.  Another side effect is that UPDATE-ing an
element or slice of an array value that is NULL now produces a non-null
result, namely an array containing just the assigned-to positions.
This commit is contained in:
Tom Lane
2004-06-09 19:08:20 +00:00
parent 3a0df651da
commit 7e64dbc6b5
27 changed files with 1468 additions and 574 deletions
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85
src/backend/nodes/outfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.238 2004/05/30 23:40:27 neilc Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.239 2004/06/09 19:08:15 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@ -745,6 +745,17 @@ _outFieldSelect(StringInfo str, FieldSelect *node)
WRITE_INT_FIELD(resulttypmod);
}
static void
_outFieldStore(StringInfo str, FieldStore *node)
{
WRITE_NODE_TYPE("FIELDSTORE");
WRITE_NODE_FIELD(arg);
WRITE_NODE_FIELD(newvals);
WRITE_NODE_FIELD(fieldnums);
WRITE_OID_FIELD(resulttype);
}
static void
_outRelabelType(StringInfo str, RelabelType *node)
{
@ -1166,8 +1177,24 @@ _outSelectStmt(StringInfo str, SelectStmt *node)
{
WRITE_NODE_TYPE("SELECT");
/* XXX this is pretty durn incomplete */
WRITE_NODE_FIELD(whereClause);
WRITE_NODE_FIELD(distinctClause);
WRITE_NODE_FIELD(into);
WRITE_NODE_FIELD(intoColNames);
WRITE_ENUM_FIELD(intoHasOids, ContainsOids);
WRITE_NODE_FIELD(targetList);
WRITE_NODE_FIELD(fromClause);
WRITE_NODE_FIELD(whereClause);
WRITE_NODE_FIELD(groupClause);
WRITE_NODE_FIELD(havingClause);
WRITE_NODE_FIELD(sortClause);
WRITE_NODE_FIELD(limitOffset);
WRITE_NODE_FIELD(limitCount);
WRITE_NODE_FIELD(forUpdate);
WRITE_ENUM_FIELD(op, SetOperation);
WRITE_BOOL_FIELD(all);
WRITE_NODE_FIELD(larg);
WRITE_NODE_FIELD(rarg);
}
static void
@ -1181,6 +1208,15 @@ _outFuncCall(StringInfo str, FuncCall *node)
WRITE_BOOL_FIELD(agg_distinct);
}
static void
_outDefElem(StringInfo str, DefElem *node)
{
WRITE_NODE_TYPE("DEFELEM");
WRITE_STRING_FIELD(defname);
WRITE_NODE_FIELD(arg);
}
static void
_outColumnDef(StringInfo str, ColumnDef *node)
{
@ -1439,7 +1475,6 @@ _outColumnRef(StringInfo str, ColumnRef *node)
WRITE_NODE_TYPE("COLUMNREF");
WRITE_NODE_FIELD(fields);
WRITE_NODE_FIELD(indirection);
}
static void
@ -1448,29 +1483,45 @@ _outParamRef(StringInfo str, ParamRef *node)
WRITE_NODE_TYPE("PARAMREF");
WRITE_INT_FIELD(number);
WRITE_NODE_FIELD(fields);
WRITE_NODE_FIELD(indirection);
}
static void
_outAConst(StringInfo str, A_Const *node)
{
WRITE_NODE_TYPE("CONST ");
WRITE_NODE_TYPE("A_CONST");
_outValue(str, &(node->val));
WRITE_NODE_FIELD(typename);
}
static void
_outExprFieldSelect(StringInfo str, ExprFieldSelect *node)
_outA_Indices(StringInfo str, A_Indices *node)
{
WRITE_NODE_TYPE("EXPRFIELDSELECT");
WRITE_NODE_TYPE("A_INDICES");
WRITE_NODE_FIELD(lidx);
WRITE_NODE_FIELD(uidx);
}
static void
_outA_Indirection(StringInfo str, A_Indirection *node)
{
WRITE_NODE_TYPE("A_INDIRECTION");
WRITE_NODE_FIELD(arg);
WRITE_NODE_FIELD(fields);
WRITE_NODE_FIELD(indirection);
}
static void
_outResTarget(StringInfo str, ResTarget *node)
{
WRITE_NODE_TYPE("RESTARGET");
WRITE_STRING_FIELD(name);
WRITE_NODE_FIELD(indirection);
WRITE_NODE_FIELD(val);
}
static void
_outConstraint(StringInfo str, Constraint *node)
{
@ -1666,6 +1717,9 @@ _outNode(StringInfo str, void *obj)
case T_FieldSelect:
_outFieldSelect(str, obj);
break;
case T_FieldStore:
_outFieldStore(str, obj);
break;
case T_RelabelType:
_outRelabelType(str, obj);
break;
@ -1815,8 +1869,14 @@ _outNode(StringInfo str, void *obj)
case T_A_Const:
_outAConst(str, obj);
break;
case T_ExprFieldSelect:
_outExprFieldSelect(str, obj);
case T_A_Indices:
_outA_Indices(str, obj);
break;
case T_A_Indirection:
_outA_Indirection(str, obj);
break;
case T_ResTarget:
_outResTarget(str, obj);
break;
case T_Constraint:
_outConstraint(str, obj);
@ -1827,6 +1887,9 @@ _outNode(StringInfo str, void *obj)
case T_FuncCall:
_outFuncCall(str, obj);
break;
case T_DefElem:
_outDefElem(str, obj);
break;
default: