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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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35
src/backend/nodes/copyfuncs.c
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@@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.284 2004/05/30 23:40:27 neilc Exp $
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.285 2004/06/09 19:08:15 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -844,6 +844,22 @@ _copyFieldSelect(FieldSelect *from)
return newnode;
}
/*
* _copyFieldStore
*/
static FieldStore *
_copyFieldStore(FieldStore *from)
{
FieldStore *newnode = makeNode(FieldStore);
COPY_NODE_FIELD(arg);
COPY_NODE_FIELD(newvals);
COPY_NODE_FIELD(fieldnums);
COPY_SCALAR_FIELD(resulttype);
return newnode;
}
/*
* _copyRelabelType
*/
@@ -1275,7 +1291,6 @@ _copyColumnRef(ColumnRef *from)
ColumnRef *newnode = makeNode(ColumnRef);
COPY_NODE_FIELD(fields);
COPY_NODE_FIELD(indirection);
return newnode;
}
@@ -1286,8 +1301,6 @@ _copyParamRef(ParamRef *from)
ParamRef *newnode = makeNode(ParamRef);
COPY_SCALAR_FIELD(number);
COPY_NODE_FIELD(fields);
COPY_NODE_FIELD(indirection);
return newnode;
}
@@ -1347,13 +1360,12 @@ _copyAIndices(A_Indices *from)
return newnode;
}
static ExprFieldSelect *
_copyExprFieldSelect(ExprFieldSelect *from)
static A_Indirection *
_copyA_Indirection(A_Indirection *from)
{
ExprFieldSelect *newnode = makeNode(ExprFieldSelect);
A_Indirection *newnode = makeNode(A_Indirection);
COPY_NODE_FIELD(arg);
COPY_NODE_FIELD(fields);
COPY_NODE_FIELD(indirection);
return newnode;
@@ -2648,6 +2660,9 @@ copyObject(void *from)
case T_FieldSelect:
retval = _copyFieldSelect(from);
break;
case T_FieldStore:
retval = _copyFieldStore(from);
break;
case T_RelabelType:
retval = _copyRelabelType(from);
break;
@@ -2984,8 +2999,8 @@ copyObject(void *from)
case T_A_Indices:
retval = _copyAIndices(from);
break;
case T_ExprFieldSelect:
retval = _copyExprFieldSelect(from);
case T_A_Indirection:
retval = _copyA_Indirection(from);
break;
case T_ResTarget:
retval = _copyResTarget(from);