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Code

Rewrite ExecPartitionCheckEmitError for clarity

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The original was hard to follow and failed to comply with DRY principle.

Discussion: https://postgr.es/m/20181206222221.g5witbsklvqthjll@alvherre.pgsql
This commit is contained in:
Alvaro Herrera 2018-12-28 14:47:05 -03:00
parent f7ea1a4233
commit e8b0e6b82d
1 changed files with 21 additions and 15 deletions
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36
src/backend/executor/execMain.c
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@ -1837,25 +1837,26 @@ ExecPartitionCheckEmitError(ResultRelInfo *resultRelInfo,
TupleTableSlot *slot,
EState *estate)
{
Relation rel = resultRelInfo->ri_RelationDesc;
Relation orig_rel = rel;
TupleDesc tupdesc = RelationGetDescr(rel);
Oid root_relid;
TupleDesc tupdesc;
char *val_desc;
Bitmapset *modifiedCols;
Bitmapset *insertedCols;
Bitmapset *updatedCols;
/*
* Need to first convert the tuple to the root partitioned table's row
* type. For details, check similar comments in ExecConstraints().
* If the tuple has been routed, it's been converted to the partition's
* rowtype, which might differ from the root table's. We must convert it
* back to the root table's rowtype so that val_desc in the error message
* matches the input tuple.
*/
if (resultRelInfo->ri_PartitionRoot)
{
TupleDesc old_tupdesc = RelationGetDescr(rel);
TupleDesc old_tupdesc;
AttrNumber *map;
rel = resultRelInfo->ri_PartitionRoot;
tupdesc = RelationGetDescr(rel);
root_relid = RelationGetRelid(resultRelInfo->ri_PartitionRoot);
tupdesc = RelationGetDescr(resultRelInfo->ri_PartitionRoot);
old_tupdesc = RelationGetDescr(resultRelInfo->ri_RelationDesc);
/* a reverse map */
map = convert_tuples_by_name_map_if_req(old_tupdesc, tupdesc,
gettext_noop("could not convert row type"));
@ -1868,11 +1869,16 @@ ExecPartitionCheckEmitError(ResultRelInfo *resultRelInfo,
slot = execute_attr_map_slot(map, slot,
MakeTupleTableSlot(tupdesc, &TTSOpsVirtual));
}
else
{
root_relid = RelationGetRelid(resultRelInfo->ri_RelationDesc);
tupdesc = RelationGetDescr(resultRelInfo->ri_RelationDesc);
}
insertedCols = GetInsertedColumns(resultRelInfo, estate);
updatedCols = GetUpdatedColumns(resultRelInfo, estate);
modifiedCols = bms_union(insertedCols, updatedCols);
val_desc = ExecBuildSlotValueDescription(RelationGetRelid(rel),
modifiedCols = bms_add_members(GetInsertedColumns(resultRelInfo, estate),
GetUpdatedColumns(resultRelInfo, estate));
val_desc = ExecBuildSlotValueDescription(root_relid,
slot,
tupdesc,
modifiedCols,
@ -1880,7 +1886,7 @@ ExecPartitionCheckEmitError(ResultRelInfo *resultRelInfo,
ereport(ERROR,
(errcode(ERRCODE_CHECK_VIOLATION),
errmsg("new row for relation \"%s\" violates partition constraint",
RelationGetRelationName(orig_rel)),
RelationGetRelationName(resultRelInfo->ri_RelationDesc)),
val_desc ? errdetail("Failing row contains %s.", val_desc) : 0));
}