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Improve the logic some more

pull/1250/head
Onder Kalaci 2017-02-23 10:50:37 +02:00
parent 4c22ed9ec2
commit 56ec4e9b77
2 changed files with 68 additions and 41 deletions
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70
src/backend/distributed/planner/multi_router_planner.c
View File

@ -801,6 +801,7 @@ AllRelationRestrictionsContainUninstantiatedQual(
List *joinInfo = list_copy(restriction->relOptInfo->joininfo);
List *allRestrictions = list_concat(baseRestrictInfo, joinInfo);
ListCell *restrictionCell = NULL;
Var *relationPartitionKey = NULL;
bool relationHasRestriction = false;
if (ContainsFalseClause(extract_actual_clauses(allRestrictions, true)))
@ -814,6 +815,8 @@ AllRelationRestrictionsContainUninstantiatedQual(
continue;
}
relationPartitionKey = PartitionKey(restriction->relationId);
foreach(restrictionCell, allRestrictions)
{
RestrictInfo *restrictInfo = (RestrictInfo *) lfirst(restrictionCell);
@ -821,7 +824,7 @@ AllRelationRestrictionsContainUninstantiatedQual(
relationHasRestriction = relationHasRestriction ||
HasUninstantiatedQualWalker(
(Node *) restrictInfo->clause,
NULL);
relationPartitionKey);
if (relationHasRestriction)
{
@ -843,24 +846,75 @@ AllRelationRestrictionsContainUninstantiatedQual(
static bool
HasUninstantiatedQualWalker(Node *node, void *context)
{
Param *param = NULL;
Var *relationPartitionColumn = (Var *) context;
if (node == NULL)
{
return false;
}
if (IsA(node, Param))
if (IsA(node, OpExpr) && list_length(((OpExpr *) node)->args) == 2)
{
param = (Param *) node;
}
OpExpr *op = (OpExpr *) node;
Node *leftop = get_leftop((Expr *) op);
Node *rightop = get_rightop((Expr *) op);
Param *param = NULL;
Var *currentColumn = NULL;
if (param && param->paramid == UNINSTANTIATED_PARAMETER_ID)
{
/* look for the Params */
if (IsA(leftop, Param))
{
param = (Param *) leftop;
/*
* Before instantiating the qual, ensure that it is equal to
* the partition key.
*/
if (IsA(rightop, Var))
{
currentColumn = (Var *) rightop;
}
}
else if (IsA(rightop, Param))
{
param = (Param *) rightop;
/*
* Before instantiating the qual, ensure that it is equal to
* the partition key.
*/
if (IsA(leftop, Var))
{
currentColumn = (Var *) leftop;
}
}
else
{
return expression_tree_walker(node, HasUninstantiatedQualWalker, context);
}
if (!(param && param->paramid == UNINSTANTIATED_PARAMETER_ID))
{
return false;
}
/* ensure that it is the relation's partition column */
if (relationPartitionColumn && currentColumn &&
currentColumn->varattno != relationPartitionColumn->varattno)
{
return false;
}
/*
* We still return true here given that finding the parameter is the
* actual goal of the walker. We only hit here once the query includes
* (partitionColumn = Const) on the query and we artificially added
* the uninstantiated parameter to the query.
*/
return true;
}
return expression_tree_walker(node, HasUninstantiatedQualWalker, NULL);
return expression_tree_walker(node, HasUninstantiatedQualWalker, context);
}

39
src/test/regress/expected/multi_insert_select.out
View File

@ -1322,22 +1322,14 @@ SELECT
raw_events_first.user_id
FROM
raw_events_first LEFT JOIN raw_events_second ON raw_events_first.user_id = raw_events_second.value_1;
DEBUG: predicate pruning for shardId 13300001
DEBUG: predicate pruning for shardId 13300002
DEBUG: predicate pruning for shardId 13300003
ERROR: cannot perform distributed planning for the given modification
DETAIL: Select query cannot be pushed down to the worker.
ERROR: cannot plan distributed query since all join conditions in the query need include two distribution keys using an equality operator
-- same as the above with INNER JOIN
INSERT INTO agg_events (user_id)
SELECT
raw_events_first.user_id
FROM
raw_events_first INNER JOIN raw_events_second ON raw_events_first.user_id = raw_events_second.value_1;
DEBUG: predicate pruning for shardId 13300001
DEBUG: predicate pruning for shardId 13300002
DEBUG: predicate pruning for shardId 13300003
ERROR: cannot perform distributed planning for the given modification
DETAIL: Select query cannot be pushed down to the worker.
ERROR: cannot plan distributed query since all join conditions in the query need include two distribution keys using an equality operator
-- a not meaningful query
INSERT INTO agg_events
(user_id)
@ -1359,11 +1351,7 @@ SELECT
raw_events_first.user_id
FROM
raw_events_first INNER JOIN raw_events_second ON raw_events_first.user_id = raw_events_second.value_1;
DEBUG: predicate pruning for shardId 13300001
DEBUG: predicate pruning for shardId 13300002
DEBUG: predicate pruning for shardId 13300003
ERROR: cannot perform distributed planning for the given modification
DETAIL: Select query cannot be pushed down to the worker.
ERROR: cannot plan distributed query since all join conditions in the query need include two distribution keys using an equality operator
-- although we do not support pushing down JOINs on non-partition
-- columns here it is safe to push it down given that we're looking for
-- a specific value (i.e., user_id = 10) on the joining column.
@ -1453,11 +1441,7 @@ SELECT
FROM
raw_events_first INNER JOIN raw_events_second ON raw_events_first.user_id = raw_events_second.value_1
WHERE raw_events_first.value_1 IN (10, 11,12) OR raw_events_second.user_id IN (1,2,3,4);
DEBUG: predicate pruning for shardId 13300001
DEBUG: predicate pruning for shardId 13300002
DEBUG: predicate pruning for shardId 13300003
ERROR: cannot perform distributed planning for the given modification
DETAIL: Select query cannot be pushed down to the worker.
ERROR: cannot plan distributed query since all join conditions in the query need include two distribution keys using an equality operator
-- implicit join on non partition column should also not be pushed down
INSERT INTO agg_events
(user_id)
@ -1507,14 +1491,7 @@ FROM
ON (f.id = f2.id)) as outer_most
GROUP BY
outer_most.id;
DEBUG: predicate pruning for shardId 13300001
DEBUG: predicate pruning for shardId 13300002
DEBUG: predicate pruning for shardId 13300003
DEBUG: predicate pruning for shardId 13300005
DEBUG: predicate pruning for shardId 13300006
DEBUG: predicate pruning for shardId 13300007
ERROR: cannot perform distributed planning for the given modification
DETAIL: Select query cannot be pushed down to the worker.
ERROR: cannot plan distributed query since all join conditions in the query need include two distribution keys using an equality operator
-- not equals on the partition column cannot be pushed down
INSERT INTO agg_events
(value_4_agg,
@ -1762,11 +1739,7 @@ SELECT user_id
FROM raw_events_first
WHERE user_id IN (SELECT value_2
FROM raw_events_second);
DEBUG: predicate pruning for shardId 13300001
DEBUG: predicate pruning for shardId 13300002
DEBUG: predicate pruning for shardId 13300003
ERROR: cannot perform distributed planning for the given modification
DETAIL: Select query cannot be pushed down to the worker.
ERROR: cannot plan distributed query since all join conditions in the query need include two distribution keys using an equality operator
-- we currently not support grouping sets
INSERT INTO agg_events
(user_id,