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refactor MapTaskList in multi physical planner (#3297)

pull/3293/head^2
SaitTalhaNisanci 2019-12-13 22:41:49 +03:00 committed by GitHub
parent 3b6b3f8c48
commit a2f2107e6a
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1 changed files with 58 additions and 53 deletions
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111
src/backend/distributed/planner/multi_physical_planner.c
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@ -194,6 +194,8 @@ static List * AssignDualHashTaskList(List *taskList);
static void AssignDataFetchDependencies(List *taskList);
static uint32 TaskListHighestTaskId(List *taskList);
static List * MapTaskList(MapMergeJob *mapMergeJob, List *filterTaskList);
static StringInfo CreateMapQueryString(MapMergeJob *mapMergeJob, Task *filterTask,
char *partitionColumnName);
static char * ColumnName(Var *column, List *rangeTableList);
static StringInfo SplitPointArrayString(ArrayType *splitPointObject,
Oid columnType, int32 columnTypeMod);
@ -4171,9 +4173,6 @@ MapTaskList(MapMergeJob *mapMergeJob, List *filterTaskList)
List *rangeTableList = filterQuery->rtable;
ListCell *filterTaskCell = NULL;
Var *partitionColumn = mapMergeJob->partitionColumn;
Oid partitionColumnType = partitionColumn->vartype;
char *partitionColumnTypeFullName = format_type_be_qualified(partitionColumnType);
int32 partitionColumnTypeMod = partitionColumn->vartypmod;
char *partitionColumnName = NULL;
List *groupClauseList = filterQuery->groupClause;
@ -4194,56 +4193,8 @@ MapTaskList(MapMergeJob *mapMergeJob, List *filterTaskList)
foreach(filterTaskCell, filterTaskList)
{
Task *filterTask = (Task *) lfirst(filterTaskCell);
uint64 jobId = filterTask->jobId;
uint32 taskId = filterTask->taskId;
/* wrap repartition query string around filter query string */
StringInfo mapQueryString = makeStringInfo();
char *filterQueryString = filterTask->queryString;
char *filterQueryEscapedText = quote_literal_cstr(filterQueryString);
PartitionType partitionType = mapMergeJob->partitionType;
if (partitionType == RANGE_PARTITION_TYPE)
{
ShardInterval **intervalArray = mapMergeJob->sortedShardIntervalArray;
uint32 intervalCount = mapMergeJob->partitionCount;
ArrayType *splitPointObject = SplitPointObject(intervalArray, intervalCount);
StringInfo splitPointString = SplitPointArrayString(splitPointObject,
partitionColumnType,
partitionColumnTypeMod);
appendStringInfo(mapQueryString, RANGE_PARTITION_COMMAND, jobId, taskId,
filterQueryEscapedText, partitionColumnName,
partitionColumnTypeFullName, splitPointString->data);
}
else if (partitionType == SINGLE_HASH_PARTITION_TYPE)
{
ShardInterval **intervalArray = mapMergeJob->sortedShardIntervalArray;
uint32 intervalCount = mapMergeJob->partitionCount;
ArrayType *splitPointObject = SplitPointObject(intervalArray, intervalCount);
StringInfo splitPointString = SplitPointArrayString(splitPointObject,
partitionColumnType,
partitionColumnTypeMod);
appendStringInfo(mapQueryString, HASH_PARTITION_COMMAND, jobId, taskId,
filterQueryEscapedText, partitionColumnName,
partitionColumnTypeFullName, splitPointString->data);
}
else
{
uint32 partitionCount = mapMergeJob->partitionCount;
ShardInterval **intervalArray =
GenerateSyntheticShardIntervalArray(partitionCount);
ArrayType *splitPointObject = SplitPointObject(intervalArray,
mapMergeJob->partitionCount);
StringInfo splitPointString =
SplitPointArrayString(splitPointObject, INT4OID, get_typmodin(INT4OID));
appendStringInfo(mapQueryString, HASH_PARTITION_COMMAND, jobId, taskId,
filterQueryEscapedText, partitionColumnName,
partitionColumnTypeFullName, splitPointString->data);
}
StringInfo mapQueryString = CreateMapQueryString(mapMergeJob, filterTask,
partitionColumnName);
/* convert filter query task into map task */
Task *mapTask = filterTask;
@ -4257,6 +4208,60 @@ MapTaskList(MapMergeJob *mapMergeJob, List *filterTaskList)
}
/*
* CreateMapQueryString creates and returns the map query string for the given filterTask.
*/
static StringInfo
CreateMapQueryString(MapMergeJob *mapMergeJob, Task *filterTask,
char *partitionColumnName)
{
uint64 jobId = filterTask->jobId;
uint32 taskId = filterTask->taskId;
/* wrap repartition query string around filter query string */
StringInfo mapQueryString = makeStringInfo();
char *filterQueryString = filterTask->queryString;
char *filterQueryEscapedText = quote_literal_cstr(filterQueryString);
PartitionType partitionType = mapMergeJob->partitionType;
Var *partitionColumn = mapMergeJob->partitionColumn;
Oid partitionColumnType = partitionColumn->vartype;
char *partitionColumnTypeFullName = format_type_be_qualified(partitionColumnType);
int32 partitionColumnTypeMod = partitionColumn->vartypmod;
ShardInterval **intervalArray = mapMergeJob->sortedShardIntervalArray;
uint32 intervalCount = mapMergeJob->partitionCount;
if (partitionType != SINGLE_HASH_PARTITION_TYPE && partitionType !=
RANGE_PARTITION_TYPE)
{
partitionColumnType = INT4OID;
partitionColumnTypeMod = get_typmodin(INT4OID);
intervalArray = GenerateSyntheticShardIntervalArray(intervalCount);
}
ArrayType *splitPointObject = SplitPointObject(intervalArray, intervalCount);
StringInfo splitPointString = SplitPointArrayString(splitPointObject,
partitionColumnType,
partitionColumnTypeMod);
char *partitionCommand = NULL;
if (partitionType == RANGE_PARTITION_TYPE)
{
partitionCommand = RANGE_PARTITION_COMMAND;
}
else
{
partitionCommand = HASH_PARTITION_COMMAND;
}
appendStringInfo(mapQueryString, partitionCommand, jobId, taskId,
filterQueryEscapedText, partitionColumnName,
partitionColumnTypeFullName, splitPointString->data);
return mapQueryString;
}
/*
* GenerateSyntheticShardIntervalArray returns a shard interval pointer array
* which has a uniform hash distribution for the given input partitionCount.