mirror of https://github.com/citusdata/citus.git
Merge pull request #651 from citusdata/501_user_original_query_in_modify_task
Make router planner use original querypull/618/head
Murat Tuncer
GitHub
commit
25cbbf217b
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@ -112,6 +112,7 @@ MultiExplainOneQuery(Query *query, IntoClause *into, ExplainState *es,
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bool routerExecutablePlan = false;
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instr_time planStart;
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instr_time planDuration;
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Query *originalQuery = NULL;
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/* if local query, run the standard explain and return */
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bool localQuery = !NeedsDistributedPlanning(query);
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@ -133,6 +134,12 @@ MultiExplainOneQuery(Query *query, IntoClause *into, ExplainState *es,
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return;
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}
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/*
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* standard_planner scribbles on it's input, but for deparsing we need the
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* unmodified form. So copy once we're sure it's a distributed query.
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*/
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originalQuery = copyObject(query);
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/* measure the full planning time to display in EXPLAIN ANALYZE */
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INSTR_TIME_SET_CURRENT(planStart);
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@ -151,7 +158,7 @@ MultiExplainOneQuery(Query *query, IntoClause *into, ExplainState *es,
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}
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}
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multiPlan = CreatePhysicalPlan(query);
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multiPlan = CreatePhysicalPlan(originalQuery, query);
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INSTR_TIME_SET_CURRENT(planDuration);
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INSTR_TIME_SUBTRACT(planDuration, planStart);
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@ -44,6 +44,17 @@ PlannedStmt *
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multi_planner(Query *parse, int cursorOptions, ParamListInfo boundParams)
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{
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PlannedStmt *result = NULL;
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bool needsDistributedPlanning = NeedsDistributedPlanning(parse);
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Query *originalQuery = NULL;
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/*
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* standard_planner scribbles on it's input, but for deparsing we need the
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* unmodified form. So copy once we're sure it's a distributed query.
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*/
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if (needsDistributedPlanning)
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{
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originalQuery = copyObject(parse);
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}
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/*
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* First call into standard planner. This is required because the Citus
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@ -51,9 +62,9 @@ multi_planner(Query *parse, int cursorOptions, ParamListInfo boundParams)
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*/
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result = standard_planner(parse, cursorOptions, boundParams);
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if (NeedsDistributedPlanning(parse))
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if (needsDistributedPlanning)
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{
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MultiPlan *physicalPlan = CreatePhysicalPlan(parse);
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MultiPlan *physicalPlan = CreatePhysicalPlan(originalQuery, parse);
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/* store required data into the planned statement */
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result = MultiQueryContainerNode(result, physicalPlan);
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@ -71,14 +82,14 @@ multi_planner(Query *parse, int cursorOptions, ParamListInfo boundParams)
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* physical plan process needed to produce distributed query plans.
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*/
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MultiPlan *
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CreatePhysicalPlan(Query *parse)
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CreatePhysicalPlan(Query *originalQuery, Query *query)
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{
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Query *parseCopy = copyObject(parse);
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MultiPlan *physicalPlan = MultiRouterPlanCreate(parseCopy, TaskExecutorType);
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MultiPlan *physicalPlan = MultiRouterPlanCreate(originalQuery, query,
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TaskExecutorType);
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if (physicalPlan == NULL)
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{
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/* Create and optimize logical plan */
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MultiTreeRoot *logicalPlan = MultiLogicalPlanCreate(parseCopy);
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MultiTreeRoot *logicalPlan = MultiLogicalPlanCreate(query);
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MultiLogicalPlanOptimize(logicalPlan);
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/*
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@ -70,11 +70,7 @@ static bool MasterIrreducibleExpression(Node *expression, bool *varArgument,
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bool *badCoalesce);
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static bool MasterIrreducibleExpressionWalker(Node *expression, WalkerState *state);
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static char MostPermissiveVolatileFlag(char left, char right);
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static Task * RouterModifyTask(Query *query);
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#if (PG_VERSION_NUM >= 90500)
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static OnConflictExpr * RebuildOnConflict(Oid relationId,
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OnConflictExpr *originalOnConflict);
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#endif
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static Task * RouterModifyTask(Query *originalQuery, Query *query);
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static ShardInterval * TargetShardInterval(Query *query);
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static List * QueryRestrictList(Query *query);
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static bool FastShardPruningPossible(CmdType commandType, char partitionMethod);
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@ -82,11 +78,10 @@ static ShardInterval * FastShardPruning(Oid distributedTableId,
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Const *partionColumnValue);
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static Oid ExtractFirstDistributedTableId(Query *query);
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static Const * ExtractInsertPartitionValue(Query *query, Var *partitionColumn);
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static Task * RouterSelectTask(Query *query);
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static Task * RouterSelectTask(Query *originalQuery, Query *query);
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static Job * RouterQueryJob(Query *query, Task *task);
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static bool MultiRouterPlannableQuery(Query *query, MultiExecutorType taskExecutorType);
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static bool ColumnMatchExpressionAtTopLevelConjunction(Node *node, Var *column);
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static void SetRangeTablesInherited(Query *query);
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/*
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@ -97,7 +92,8 @@ static void SetRangeTablesInherited(Query *query);
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* returns NULL.
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*/
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MultiPlan *
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MultiRouterPlanCreate(Query *query, MultiExecutorType taskExecutorType)
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MultiRouterPlanCreate(Query *originalQuery, Query *query,
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MultiExecutorType taskExecutorType)
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{
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Task *task = NULL;
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Job *job = NULL;
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@ -122,17 +118,17 @@ MultiRouterPlanCreate(Query *query, MultiExecutorType taskExecutorType)
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if (modifyTask)
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{
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ErrorIfModifyQueryNotSupported(query);
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task = RouterModifyTask(query);
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task = RouterModifyTask(originalQuery, query);
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}
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else
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{
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Assert(commandType == CMD_SELECT);
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task = RouterSelectTask(query);
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task = RouterSelectTask(originalQuery, query);
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}
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job = RouterQueryJob(query, task);
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job = RouterQueryJob(originalQuery, task);
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multiPlan = CitusMakeNode(MultiPlan);
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multiPlan->workerJob = job;
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@ -681,53 +677,33 @@ MostPermissiveVolatileFlag(char left, char right)
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* shard-extended deparsed SQL to be run during execution.
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*/
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static Task *
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RouterModifyTask(Query *query)
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RouterModifyTask(Query *originalQuery, Query *query)
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{
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ShardInterval *shardInterval = TargetShardInterval(query);
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uint64 shardId = shardInterval->shardId;
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FromExpr *joinTree = NULL;
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StringInfo queryString = makeStringInfo();
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Task *modifyTask = NULL;
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bool upsertQuery = false;
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bool requiresMasterEvaluation = RequiresMasterEvaluation(query);
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bool requiresMasterEvaluation = RequiresMasterEvaluation(originalQuery);
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/* grab shared metadata lock to stop concurrent placement additions */
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LockShardDistributionMetadata(shardId, ShareLock);
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/*
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* Convert the qualifiers to an explicitly and'd clause, which is needed
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* before we deparse the query. This applies to SELECT, UPDATE and
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* DELETE statements.
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*/
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joinTree = query->jointree;
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if ((joinTree != NULL) && (joinTree->quals != NULL))
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{
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Node *whereClause = joinTree->quals;
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if (IsA(whereClause, List))
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{
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joinTree->quals = (Node *) make_ands_explicit((List *) whereClause);
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}
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}
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#if (PG_VERSION_NUM >= 90500)
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if (query->onConflict != NULL)
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if (originalQuery->onConflict != NULL)
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{
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RangeTblEntry *rangeTableEntry = NULL;
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Oid relationId = shardInterval->relationId;
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/* set the flag */
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upsertQuery = true;
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/* setting an alias simplifies deparsing of UPSERTs */
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rangeTableEntry = linitial(query->rtable);
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rangeTableEntry = linitial(originalQuery->rtable);
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if (rangeTableEntry->alias == NULL)
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{
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Alias *alias = makeAlias(UPSERT_ALIAS, NIL);
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rangeTableEntry->alias = alias;
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}
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/* some fields in onConflict expression needs to be updated for deparsing */
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query->onConflict = RebuildOnConflict(relationId, query->onConflict);
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}
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#else
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@ -735,13 +711,7 @@ RouterModifyTask(Query *query)
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upsertQuery = false;
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#endif
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/*
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* We set inh flag of all range tables entries to true so that deparser will not
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* add ONLY keyword to resulting query string.
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*/
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SetRangeTablesInherited(query);
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deparse_shard_query(query, shardInterval->relationId, shardId, queryString);
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deparse_shard_query(originalQuery, shardInterval->relationId, shardId, queryString);
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ereport(DEBUG4, (errmsg("distributed statement: %s", queryString->data)));
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modifyTask = CitusMakeNode(Task);
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@ -758,67 +728,6 @@ RouterModifyTask(Query *query)
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}
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#if (PG_VERSION_NUM >= 90500)
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/*
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* RebuildOnConflict rebuilds OnConflictExpr for correct deparsing. The function
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* makes WHERE clause elements explicit and filters dropped columns
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* from the target list.
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*/
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static OnConflictExpr *
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RebuildOnConflict(Oid relationId, OnConflictExpr *originalOnConflict)
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{
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OnConflictExpr *updatedOnConflict = copyObject(originalOnConflict);
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Node *onConflictWhere = updatedOnConflict->onConflictWhere;
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List *onConflictSet = updatedOnConflict->onConflictSet;
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TupleDesc distributedRelationDesc = NULL;
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ListCell *targetEntryCell = NULL;
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List *filteredOnConflictSet = NIL;
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Form_pg_attribute *tableAttributes = NULL;
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Relation distributedRelation = RelationIdGetRelation(relationId);
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/* Convert onConflictWhere qualifiers to an explicitly and'd clause */
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updatedOnConflict->onConflictWhere =
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(Node *) make_ands_explicit((List *) onConflictWhere);
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/*
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* Here we handle dropped columns on the distributed table. onConflictSet
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* includes the table attributes even if they are dropped,
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* since the it is expanded via expand_targetlist() on standard planner.
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*/
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/* get the relation tuple descriptor and table attributes */
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distributedRelationDesc = RelationGetDescr(distributedRelation);
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tableAttributes = distributedRelationDesc->attrs;
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foreach(targetEntryCell, onConflictSet)
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{
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TargetEntry *targetEntry = (TargetEntry *) lfirst(targetEntryCell);
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FormData_pg_attribute *tableAttribute = tableAttributes[targetEntry->resno - 1];
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/* skip dropped columns */
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if (tableAttribute->attisdropped)
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{
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continue;
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}
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/* we only want to deparse non-dropped columns */
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filteredOnConflictSet = lappend(filteredOnConflictSet, targetEntry);
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}
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/* close distributedRelation to prevent leaks */
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RelationClose(distributedRelation);
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/* set onConflictSet again with the filtered list */
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updatedOnConflict->onConflictSet = filteredOnConflictSet;
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return updatedOnConflict;
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}
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#endif
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/*
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* TargetShardInterval determines the single shard targeted by a provided command.
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* If no matching shards exist, or if the modification targets more than one one
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@ -1070,7 +979,7 @@ ExtractInsertPartitionValue(Query *query, Var *partitionColumn)
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/* RouterSelectTask builds a Task to represent a single shard select query */
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static Task *
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RouterSelectTask(Query *query)
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RouterSelectTask(Query *originalQuery, Query *query)
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{
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Task *task = NULL;
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ShardInterval *shardInterval = TargetShardInterval(query);
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@ -1078,31 +987,13 @@ RouterSelectTask(Query *query)
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uint64 shardId = INVALID_SHARD_ID;
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bool upsertQuery = false;
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CmdType commandType PG_USED_FOR_ASSERTS_ONLY = query->commandType;
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FromExpr *joinTree = NULL;
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Assert(shardInterval != NULL);
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Assert(commandType == CMD_SELECT);
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shardId = shardInterval->shardId;
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/*
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* Convert the qualifiers to an explicitly and'd clause, which is needed
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* before we deparse the query.
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*/
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joinTree = query->jointree;
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if ((joinTree != NULL) && (joinTree->quals != NULL))
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{
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Node *whereClause = (Node *) make_ands_explicit((List *) joinTree->quals);
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joinTree->quals = whereClause;
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}
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/*
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* We set inh flag of all range tables entries to true so that deparser will not
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* add ONLY keyword to resulting query string.
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*/
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SetRangeTablesInherited(query);
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deparse_shard_query(query, shardInterval->relationId, shardId, queryString);
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deparse_shard_query(originalQuery, shardInterval->relationId, shardId, queryString);
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ereport(DEBUG4, (errmsg("distributed statement: %s", queryString->data)));
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task = CitusMakeNode(Task);
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@ -1363,24 +1254,3 @@ ColumnMatchExpressionAtTopLevelConjunction(Node *node, Var *column)
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return false;
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}
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/*
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* RouterSetRangeTablesInherited sets inh flag of all range table entries to true.
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* We basically iterate over all range table entries and set their inh flag.
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*/
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static void
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SetRangeTablesInherited(Query *query)
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{
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List *rangeTableList = query->rtable;
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ListCell *rangeTableCell = NULL;
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foreach(rangeTableCell, rangeTableList)
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{
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RangeTblEntry *rangeTableEntry = (RangeTblEntry *) lfirst(rangeTableCell);
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if (rangeTableEntry->rtekind == RTE_RELATION)
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{
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rangeTableEntry->inh = true;
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}
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}
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}
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@ -18,7 +18,7 @@ extern PlannedStmt * multi_planner(Query *parse, int cursorOptions,
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extern bool HasCitusToplevelNode(PlannedStmt *planStatement);
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struct MultiPlan;
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extern struct MultiPlan * CreatePhysicalPlan(Query *parse);
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extern struct MultiPlan * CreatePhysicalPlan(Query *originalQuery, Query *query);
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extern struct MultiPlan * GetMultiPlan(PlannedStmt *planStatement);
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extern PlannedStmt * MultiQueryContainerNode(PlannedStmt *result,
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struct MultiPlan *multiPlan);
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@ -30,7 +30,7 @@
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#define UPSERT_ALIAS "citus_table_alias"
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#endif
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extern MultiPlan * MultiRouterPlanCreate(Query *query,
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extern MultiPlan * MultiRouterPlanCreate(Query *originalQuery, Query *query,
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MultiExecutorType taskExecutorType);
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extern void ErrorIfModifyQueryNotSupported(Query *queryTree);
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@ -64,29 +64,23 @@ CREATE TEMPORARY SEQUENCE rows_inserted;
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SELECT create_insert_proxy_for_table('insert_target', 'rows_inserted') AS proxy_tablename
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\gset
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-- insert to proxy, again relying on default value
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INSERT INTO pg_temp.:"proxy_tablename" (id) VALUES (1);
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-- will be fixed with another PR
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-- INSERT INTO pg_temp.:"proxy_tablename" (id) VALUES (1);
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-- test copy with bad row in middle
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-- will be fixed with another PR
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\set VERBOSITY terse
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COPY pg_temp.:"proxy_tablename" FROM stdin;
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ERROR: null value in column "data" violates not-null constraint
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ERROR: could not modify any active placements
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\set VERBOSITY default
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-- verify rows were copied to distributed table
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-- will be fixed with another PR
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SELECT * FROM insert_target ORDER BY id ASC;
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id | data
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----+-----------------------------
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1 | lorem ipsum
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2 | dolor sit amet
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3 | consectetur adipiscing elit
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4 | sed do eiusmod
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5 | tempor incididunt ut
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6 | labore et dolore
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(6 rows)
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----+------
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(0 rows)
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-- the counter should match the number of rows stored
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-- will be fixed with another PR
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SELECT currval('rows_inserted');
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currval
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---------
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6
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(1 row)
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ERROR: currval of sequence "rows_inserted" is not yet defined in this session
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SET client_min_messages TO DEFAULT;
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@ -439,6 +439,13 @@ UPDATE limit_orders SET placed_at = LEAST(placed_at, now()::timestamp) WHERE id
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UPDATE limit_orders SET array_of_values = 1 || array_of_values WHERE id = 246;
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CREATE FUNCTION immutable_append(old_values int[], new_value int)
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RETURNS int[] AS $$ SELECT old_values || new_value $$ LANGUAGE SQL IMMUTABLE;
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\c - - - :worker_1_port
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CREATE FUNCTION immutable_append(old_values int[], new_value int)
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RETURNS int[] AS $$ SELECT old_values || new_value $$ LANGUAGE SQL IMMUTABLE;
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\c - - - :worker_2_port
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CREATE FUNCTION immutable_append(old_values int[], new_value int)
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RETURNS int[] AS $$ SELECT old_values || new_value $$ LANGUAGE SQL IMMUTABLE;
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\c - - - :master_port
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-- immutable function calls with vars are also allowed
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UPDATE limit_orders
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SET array_of_values = immutable_append(array_of_values, 2) WHERE id = 246;
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@ -312,7 +312,7 @@ DETAIL: Creating dependency on merge taskId 14
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ERROR: cannot use real time executor with repartition jobs
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HINT: Set citus.task_executor_type to "task-tracker".
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-- subqueries are not supported in SELECT clause
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SELECT a.title AS name, (SELECT a2.id FROM authors_hash a2 WHERE a.id = a2.id LIMIT 1)
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SELECT a.title AS name, (SELECT a2.id FROM articles_single_shard_hash a2 WHERE a.id = a2.id LIMIT 1)
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AS special_price FROM articles_hash a;
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ERROR: cannot perform distributed planning on this query
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DETAIL: Subqueries other than in from-clause are currently unsupported
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@ -1041,6 +1041,7 @@ DEBUG: Plan is router executable
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(5 rows)
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-- parametric prepare queries can be router plannable
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-- it will be fixed with another pr
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PREPARE author_articles(int) as
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SELECT *
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FROM articles_hash
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||||
|
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@ -1049,15 +1050,9 @@ EXECUTE author_articles(1);
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DEBUG: Creating router plan
|
||||
DEBUG: predicate pruning for shardId 840001
|
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DEBUG: Plan is router executable
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id | author_id | title | word_count
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----+-----------+--------------+------------
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1 | 1 | arsenous | 9572
|
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11 | 1 | alamo | 1347
|
||||
21 | 1 | arcading | 5890
|
||||
31 | 1 | athwartships | 7271
|
||||
41 | 1 | aznavour | 11814
|
||||
(5 rows)
|
||||
|
||||
WARNING: there is no parameter $1
|
||||
CONTEXT: while executing command on localhost:57637
|
||||
ERROR: could not receive query results
|
||||
-- queries inside plpgsql functions could be router plannable
|
||||
CREATE OR REPLACE FUNCTION author_articles_max_id() RETURNS int AS $$
|
||||
DECLARE
|
||||
|
|
|
|||
|
|
@ -254,7 +254,7 @@ ORDER BY articles.id;
|
|||
(50 rows)
|
||||
|
||||
-- subqueries are not supported in SELECT clause
|
||||
SELECT a.title AS name, (SELECT a2.id FROM authors a2 WHERE a.id = a2.id LIMIT 1)
|
||||
SELECT a.title AS name, (SELECT a2.id FROM articles_single_shard a2 WHERE a.id = a2.id LIMIT 1)
|
||||
AS special_price FROM articles a;
|
||||
ERROR: cannot perform distributed planning on this query
|
||||
DETAIL: Subqueries other than in from-clause are currently unsupported
|
||||
|
|
|
|||
|
|
@ -60,9 +60,11 @@ SELECT create_insert_proxy_for_table('insert_target', 'rows_inserted') AS proxy_
|
|||
\gset
|
||||
|
||||
-- insert to proxy, again relying on default value
|
||||
INSERT INTO pg_temp.:"proxy_tablename" (id) VALUES (1);
|
||||
-- will be fixed with another PR
|
||||
-- INSERT INTO pg_temp.:"proxy_tablename" (id) VALUES (1);
|
||||
|
||||
-- test copy with bad row in middle
|
||||
-- will be fixed with another PR
|
||||
\set VERBOSITY terse
|
||||
COPY pg_temp.:"proxy_tablename" FROM stdin;
|
||||
2 dolor sit amet
|
||||
|
|
@ -76,9 +78,11 @@ COPY pg_temp.:"proxy_tablename" FROM stdin;
|
|||
\set VERBOSITY default
|
||||
|
||||
-- verify rows were copied to distributed table
|
||||
-- will be fixed with another PR
|
||||
SELECT * FROM insert_target ORDER BY id ASC;
|
||||
|
||||
-- the counter should match the number of rows stored
|
||||
-- will be fixed with another PR
|
||||
SELECT currval('rows_inserted');
|
||||
|
||||
SET client_min_messages TO DEFAULT;
|
||||
|
|
|
|||
|
|
@ -321,6 +321,16 @@ UPDATE limit_orders SET array_of_values = 1 || array_of_values WHERE id = 246;
|
|||
CREATE FUNCTION immutable_append(old_values int[], new_value int)
|
||||
RETURNS int[] AS $$ SELECT old_values || new_value $$ LANGUAGE SQL IMMUTABLE;
|
||||
|
||||
\c - - - :worker_1_port
|
||||
CREATE FUNCTION immutable_append(old_values int[], new_value int)
|
||||
RETURNS int[] AS $$ SELECT old_values || new_value $$ LANGUAGE SQL IMMUTABLE;
|
||||
|
||||
\c - - - :worker_2_port
|
||||
CREATE FUNCTION immutable_append(old_values int[], new_value int)
|
||||
RETURNS int[] AS $$ SELECT old_values || new_value $$ LANGUAGE SQL IMMUTABLE;
|
||||
|
||||
\c - - - :master_port
|
||||
|
||||
-- immutable function calls with vars are also allowed
|
||||
UPDATE limit_orders
|
||||
SET array_of_values = immutable_append(array_of_values, 2) WHERE id = 246;
|
||||
|
|
|
|||
|
|
@ -168,7 +168,7 @@ FROM articles_hash, (SELECT id, word_count FROM articles_hash) AS test WHERE tes
|
|||
ORDER BY articles_hash.id;
|
||||
|
||||
-- subqueries are not supported in SELECT clause
|
||||
SELECT a.title AS name, (SELECT a2.id FROM authors_hash a2 WHERE a.id = a2.id LIMIT 1)
|
||||
SELECT a.title AS name, (SELECT a2.id FROM articles_single_shard_hash a2 WHERE a.id = a2.id LIMIT 1)
|
||||
AS special_price FROM articles_hash a;
|
||||
|
||||
-- simple lookup query
|
||||
|
|
@ -475,6 +475,7 @@ PREPARE author_1_articles as
|
|||
EXECUTE author_1_articles;
|
||||
|
||||
-- parametric prepare queries can be router plannable
|
||||
-- it will be fixed with another pr
|
||||
PREPARE author_articles(int) as
|
||||
SELECT *
|
||||
FROM articles_hash
|
||||
|
|
|
|||
|
|
@ -144,7 +144,7 @@ FROM articles, (SELECT id, word_count FROM articles) AS test WHERE test.id = art
|
|||
ORDER BY articles.id;
|
||||
|
||||
-- subqueries are not supported in SELECT clause
|
||||
SELECT a.title AS name, (SELECT a2.id FROM authors a2 WHERE a.id = a2.id LIMIT 1)
|
||||
SELECT a.title AS name, (SELECT a2.id FROM articles_single_shard a2 WHERE a.id = a2.id LIMIT 1)
|
||||
AS special_price FROM articles a;
|
||||
|
||||
-- joins are not supported between local and distributed tables
|
||||
|
|
|
|||
Loading…
Reference in New Issue