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> Huh, I don't know where I got the idea you were (or someone else was?)

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> in the position that attislocal should be reset.  I'll clean everything
> up and submit the patch I had originally made.

All right, this is it.  This patch merely checks if child tables have
the column.  If atttypid and atttypmod are the same, the attributes'
attinhcount is incremented; else the operation is aborted.  If child
tables don't have the column, recursively add it.

attislocal is not touched in any case.

Alvaro Herrera
This commit is contained in:
Bruce Momjian 2002-10-19 02:09:45 +00:00
parent bab3d29fba
commit cabad378fc
1 changed files with 38 additions and 7 deletions
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43
src/backend/commands/tablecmds.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.45 2002/09/28 20:00:19 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/tablecmds.c,v 1.46 2002/10/19 02:09:45 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -1643,22 +1643,53 @@ AlterTableAddColumn(Oid myrelid,
colDefChild->inhcount = 1;
colDefChild->is_local = false;
/* this routine is actually in the planner */
children = find_all_inheritors(myrelid);
/* we only need direct inheritors */
children = find_inheritance_children(myrelid);
/*
* find_all_inheritors does the recursive search of the
* inheritance hierarchy, so all we have to do is process all of
* the relids in the list that it returns.
* If the child has a column with same name and type,
* increment its attinhcount and continue. If it has
* different type, abort. If it doesn't have a column
* with the same name, add it.
*/
foreach(child, children)
{
Oid childrelid = lfirsti(child);
HeapTuple tuple;
Form_pg_attribute childatt;
if (childrelid == myrelid)
continue;
attrdesc = heap_openr(AttributeRelationName, RowExclusiveLock);
tuple = SearchSysCacheCopyAttName(childrelid, colDef->colname);
if (!HeapTupleIsValid(tuple))
{
heap_close(attrdesc, RowExclusiveLock);
AlterTableAddColumn(childrelid, false, true, colDefChild);
continue;
}
childatt = (Form_pg_attribute) GETSTRUCT(tuple);
typeTuple = typenameType(colDef->typename);
tform = (Form_pg_type) GETSTRUCT(typeTuple);
if (HeapTupleGetOid(typeTuple) != childatt->atttypid ||
colDef->typename->typemod != childatt->atttypmod)
elog(ERROR, "ALTER TABLE: child table %u has different "
"type for column \"%s\"",
childrelid, colDef->colname);
childatt->attinhcount++;
simple_heap_update(attrdesc, &tuple->t_self, tuple);
CatalogUpdateIndexes(attrdesc, tuple);
elog(NOTICE, "ALTER TABLE: merging definition of column "
"\"%s\" for child %u", colDef->colname, childrelid);
heap_close(attrdesc, RowExclusiveLock);
heap_freetuple(tuple);
ReleaseSysCache(typeTuple);
}
}
else