*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/access/common/tupdesc.c,v 1.111 2005/04/14 22:34:48 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/access/common/tupdesc.c,v 1.112 2005/10/15 02:49:08 momjian Exp $
*
* NOTES
* some of the executor utility code such as "ExecTypeFromTL" should be
* Allocate enough memory for the tuple descriptor, including the
* attribute rows, and set up the attribute row pointers.
*
- * Note: we assume that sizeof(struct tupleDesc) is a multiple of
- * the struct pointer alignment requirement, and hence we don't need
- * to insert alignment padding between the struct and the array of
- * attribute row pointers.
+ * Note: we assume that sizeof(struct tupleDesc) is a multiple of the struct
+ * pointer alignment requirement, and hence we don't need to insert
+ * alignment padding between the struct and the array of attribute row
+ * pointers.
*/
attroffset = sizeof(struct tupleDesc) + natts * sizeof(Form_pg_attribute);
attroffset = MAXALIGN(attroffset);
Form_pg_attribute attr2 = tupdesc2->attrs[i];
/*
- * We do not need to check every single field here: we can
- * disregard attrelid and attnum (which were used to place the row
- * in the attrs array in the first place). It might look like we
- * could dispense with checking attlen/attbyval/attalign, since these
- * are derived from atttypid; but in the case of dropped columns
- * we must check them (since atttypid will be zero for all dropped
- * columns) and in general it seems safer to check them always.
+ * We do not need to check every single field here: we can disregard
+ * attrelid and attnum (which were used to place the row in the attrs
+ * array in the first place). It might look like we could dispense
+ * with checking attlen/attbyval/attalign, since these are derived
+ * from atttypid; but in the case of dropped columns we must check
+ * them (since atttypid will be zero for all dropped columns) and in
+ * general it seems safer to check them always.
*
- * attcacheoff must NOT be checked since it's possibly not set
- * in both copies.
+ * attcacheoff must NOT be checked since it's possibly not set in both
+ * copies.
*/
if (strcmp(NameStr(attr1->attname), NameStr(attr2->attname)) != 0)
return false;
AttrDefault *defval2 = constr2->defval;
/*
- * We can't assume that the items are always read from the
- * system catalogs in the same order; so use the adnum field
- * to identify the matching item to compare.
+ * We can't assume that the items are always read from the system
+ * catalogs in the same order; so use the adnum field to identify
+ * the matching item to compare.
*/
for (j = 0; j < n; defval2++, j++)
{
ConstrCheck *check2 = constr2->check;
/*
- * Similarly, don't assume that the checks are always read in
- * the same order; match them up by name and contents. (The
- * name *should* be unique, but...)
+ * Similarly, don't assume that the checks are always read in the
+ * same order; match them up by name and contents. (The name
+ * *should* be unique, but...)
*/
for (j = 0; j < n; check2++, j++)
{
/*
* Note: attributeName can be NULL, because the planner doesn't always
- * fill in valid resname values in targetlists, particularly for
- * resjunk attributes.
+ * fill in valid resname values in targetlists, particularly for resjunk
+ * attributes.
*/
if (attributeName != NULL)
namestrcpy(&(att->attname), attributeName);
ColumnDef *entry = lfirst(l);
/*
- * for each entry in the list, get the name and type information
- * from the list and have TupleDescInitEntry fill in the attribute
+ * for each entry in the list, get the name and type information from
+ * the list and have TupleDescInitEntry fill in the attribute
* information we need.
*/
attnum++;
desc->attrs[attnum - 1]->attnotnull = entry->is_not_null;
/*
- * Note we copy only pre-cooked default expressions. Digestion of
- * raw ones is someone else's problem.
+ * Note we copy only pre-cooked default expressions. Digestion of raw
+ * ones is someone else's problem.
*/
if (entry->cooked_default != NULL)
{
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