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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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14
src/include/nodes/execnodes.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/nodes/execnodes.h,v 1.116 2004/05/10 22:44:49 tgl Exp $
* $PostgreSQL: pgsql/src/include/nodes/execnodes.h,v 1.117 2004/06/09 19:08:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -574,6 +574,18 @@ typedef struct FieldSelectState
TupleDesc argdesc; /* tupdesc for most recent input */
} FieldSelectState;
/* ----------------
* FieldStoreState node
* ----------------
*/
typedef struct FieldStoreState
{
ExprState xprstate;
ExprState *arg; /* input tuple value */
List *newvals; /* new value(s) for field(s) */
TupleDesc argdesc; /* tupdesc for most recent input */
} FieldStoreState;
/* ----------------
* CaseExprState node
* ----------------