/**
* Construct a conditional task given the current leaf task, the MoveWork and the MapredWork.
*
* @param conf HiveConf
* @param currTask current leaf task
* @param mvWork MoveWork for the move task
* @param mergeWork MapredWork for the merge task.
* @param inputPath the input directory of the merge/move task
* @return The conditional task
*/
private ConditionalTask createCondTask(
HiveConf conf,
Task<? extends Serializable> currTask,
MoveWork mvWork,
MapredWork mergeWork,
String inputPath) {
Task<? extends Serializable> mergeTask = TaskFactory.get(mergeWork, conf);
Task<? extends Serializable> moveTask = TaskFactory.get(mvWork, conf);
List<Serializable> listWorks = new ArrayList<Serializable>();
listWorks.add(mvWork);
listWorks.add(mergeWork);
ConditionalWork cndWork = new ConditionalWork(listWorks);
List<Task<? extends Serializable>> listTasks = new ArrayList<Task<? extends Serializable>>();
listTasks.add(moveTask);
listTasks.add(mergeTask);
ConditionalTask cndTsk = (ConditionalTask) TaskFactory.get(cndWork, conf);
cndTsk.setListTasks(listTasks);
// create resolver
cndTsk.setResolver(new ConditionalResolverMergeFiles());
ConditionalResolverMergeFilesCtx mrCtx =
new ConditionalResolverMergeFilesCtx(listTasks, inputPath);
cndTsk.setResolverCtx(mrCtx);
// make the conditional task as the child of the current leaf task
currTask.addDependentTask(cndTsk);
return cndTsk;
}
/**
* Construct a conditional task given the current leaf task, the MoveWork and the MapredWork.
*
* @param conf HiveConf
* @param currTask current leaf task
* @param mvWork MoveWork for the move task
* @param mergeWork MapredWork for the merge task.
* @param inputPath the input directory of the merge/move task
* @return The conditional task
*/
private ConditionalTask createCondTask(
HiveConf conf,
Task<? extends Serializable> currTask,
MoveWork mvWork,
MapredWork mergeWork,
String inputPath) {
// There are 3 options for this ConditionalTask:
// 1) Merge the partitions
// 2) Move the partitions (i.e. don't merge the partitions)
// 3) Merge some partitions and move other partitions (i.e. merge some partitions and don't
// merge others) in this case the merge is done first followed by the move to prevent
// conflicts.
Task<? extends Serializable> mergeOnlyMergeTask = TaskFactory.get(mergeWork, conf);
Task<? extends Serializable> moveOnlyMoveTask = TaskFactory.get(mvWork, conf);
Task<? extends Serializable> mergeAndMoveMergeTask = TaskFactory.get(mergeWork, conf);
Task<? extends Serializable> mergeAndMoveMoveTask = TaskFactory.get(mvWork, conf);
// NOTE! It is necessary merge task is the parent of the move task, and not
// the other way around, for the proper execution of the execute method of
// ConditionalTask
mergeAndMoveMergeTask.addDependentTask(mergeAndMoveMoveTask);
List<Serializable> listWorks = new ArrayList<Serializable>();
listWorks.add(mvWork);
listWorks.add(mergeWork);
ConditionalWork cndWork = new ConditionalWork(listWorks);
List<Task<? extends Serializable>> listTasks = new ArrayList<Task<? extends Serializable>>();
listTasks.add(moveOnlyMoveTask);
listTasks.add(mergeOnlyMergeTask);
listTasks.add(mergeAndMoveMergeTask);
ConditionalTask cndTsk = (ConditionalTask) TaskFactory.get(cndWork, conf);
cndTsk.setListTasks(listTasks);
// create resolver
cndTsk.setResolver(new ConditionalResolverMergeFiles());
ConditionalResolverMergeFilesCtx mrCtx =
new ConditionalResolverMergeFilesCtx(listTasks, inputPath);
cndTsk.setResolverCtx(mrCtx);
// make the conditional task as the child of the current leaf task
currTask.addDependentTask(cndTsk);
return cndTsk;
}
/**
* Add the StatsTask as a dependent task of the MoveTask because StatsTask will change the
* Table/Partition metadata. For atomicity, we should not change it before the data is actually
* there done by MoveTask.
*
* @param nd the FileSinkOperator whose results are taken care of by the MoveTask.
* @param mvTask The MoveTask that moves the FileSinkOperator's results.
* @param currTask The MapRedTask that the FileSinkOperator belongs to.
* @param hconf HiveConf
*/
private void addStatsTask(
FileSinkOperator nd, MoveTask mvTask, Task<? extends Serializable> currTask, HiveConf hconf) {
MoveWork mvWork = ((MoveTask) mvTask).getWork();
StatsWork statsWork = null;
if (mvWork.getLoadTableWork() != null) {
statsWork = new StatsWork(mvWork.getLoadTableWork());
} else if (mvWork.getLoadFileWork() != null) {
statsWork = new StatsWork(mvWork.getLoadFileWork());
}
assert statsWork != null : "Error when genereting StatsTask";
statsWork.setStatsReliable(hconf.getBoolVar(ConfVars.HIVE_STATS_RELIABLE));
MapredWork mrWork = (MapredWork) currTask.getWork();
// AggKey in StatsWork is used for stats aggregation while StatsAggPrefix
// in FileSinkDesc is used for stats publishing. They should be consistent.
statsWork.setAggKey(((FileSinkOperator) nd).getConf().getStatsAggPrefix());
Task<? extends Serializable> statsTask = TaskFactory.get(statsWork, hconf);
// mark the MapredWork and FileSinkOperator for gathering stats
nd.getConf().setGatherStats(true);
mrWork.setGatheringStats(true);
nd.getConf().setStatsReliable(hconf.getBoolVar(ConfVars.HIVE_STATS_RELIABLE));
nd.getConf()
.setMaxStatsKeyPrefixLength(hconf.getIntVar(ConfVars.HIVE_STATS_KEY_PREFIX_MAX_LENGTH));
// mrWork.addDestinationTable(nd.getConf().getTableInfo().getTableName());
// subscribe feeds from the MoveTask so that MoveTask can forward the list
// of dynamic partition list to the StatsTask
mvTask.addDependentTask(statsTask);
statsTask.subscribeFeed(mvTask);
}
/**
* handle partial scan command.
*
* <p>It is composed of PartialScanTask followed by StatsTask.
*/
private void handlePartialScanCommand(
TableScanOperator tableScan,
ParseContext parseContext,
StatsWork statsWork,
GenTezProcContext context,
Task<StatsWork> statsTask)
throws SemanticException {
String aggregationKey = tableScan.getConf().getStatsAggPrefix();
StringBuilder aggregationKeyBuffer = new StringBuilder(aggregationKey);
List<Path> inputPaths =
GenMapRedUtils.getInputPathsForPartialScan(tableScan, aggregationKeyBuffer);
aggregationKey = aggregationKeyBuffer.toString();
// scan work
PartialScanWork scanWork = new PartialScanWork(inputPaths);
scanWork.setMapperCannotSpanPartns(true);
scanWork.setAggKey(aggregationKey);
scanWork.setStatsTmpDir(tableScan.getConf().getTmpStatsDir(), parseContext.getConf());
// stats work
statsWork.setPartialScanAnalyzeCommand(true);
// partial scan task
DriverContext driverCxt = new DriverContext();
Task<PartialScanWork> partialScanTask = TaskFactory.get(scanWork, parseContext.getConf());
partialScanTask.initialize(parseContext.getConf(), null, driverCxt);
partialScanTask.setWork(scanWork);
statsWork.setSourceTask(partialScanTask);
// task dependency
context.rootTasks.remove(context.currentTask);
context.rootTasks.add(partialScanTask);
partialScanTask.addDependentTask(statsTask);
}
/**
* Table Sink encountered
*
* @param nd the table sink operator encountered
* @param opProcCtx context
*/
public Object process(
Node nd, Stack<Node> stack, NodeProcessorCtx opProcCtx, Object... nodeOutputs)
throws SemanticException {
TableScanOperator op = (TableScanOperator) nd;
GenMRProcContext ctx = (GenMRProcContext) opProcCtx;
ParseContext parseCtx = ctx.getParseCtx();
Map<Operator<? extends Serializable>, GenMapRedCtx> mapCurrCtx = ctx.getMapCurrCtx();
// create a dummy task
Task<? extends Serializable> currTask =
TaskFactory.get(GenMapRedUtils.getMapRedWork(), parseCtx.getConf());
Operator<? extends Serializable> currTopOp = op;
ctx.setCurrTask(currTask);
ctx.setCurrTopOp(currTopOp);
for (String alias : parseCtx.getTopOps().keySet()) {
Operator<? extends Serializable> currOp = parseCtx.getTopOps().get(alias);
if (currOp == op) {
String currAliasId = alias;
ctx.setCurrAliasId(currAliasId);
mapCurrCtx.put(op, new GenMapRedCtx(currTask, currTopOp, currAliasId));
return null;
}
}
assert false;
return null;
}
/**
* handle partial scan command. It is composed of PartialScanTask followed by StatsTask .
*
* @param op
* @param ctx
* @param parseCtx
* @param currTask
* @param parseInfo
* @param statsWork
* @param statsTask
* @throws SemanticException
*/
private void handlePartialScanCommand(
TableScanOperator op,
GenMRProcContext ctx,
ParseContext parseCtx,
Task<? extends Serializable> currTask,
StatsWork statsWork,
Task<StatsWork> statsTask)
throws SemanticException {
String aggregationKey = op.getConf().getStatsAggPrefix();
StringBuffer aggregationKeyBuffer = new StringBuffer(aggregationKey);
List<Path> inputPaths = GenMapRedUtils.getInputPathsForPartialScan(op, aggregationKeyBuffer);
aggregationKey = aggregationKeyBuffer.toString();
// scan work
PartialScanWork scanWork = new PartialScanWork(inputPaths);
scanWork.setMapperCannotSpanPartns(true);
scanWork.setAggKey(aggregationKey);
// stats work
statsWork.setPartialScanAnalyzeCommand(true);
// partial scan task
DriverContext driverCxt = new DriverContext();
Task<PartialScanWork> psTask = TaskFactory.get(scanWork, parseCtx.getConf());
psTask.initialize(parseCtx.getConf(), null, driverCxt);
psTask.setWork(scanWork);
// task dependency
ctx.getRootTasks().remove(currTask);
ctx.getRootTasks().add(psTask);
psTask.addDependentTask(statsTask);
List<Task<? extends Serializable>> parentTasks = new ArrayList<Task<? extends Serializable>>();
parentTasks.add(psTask);
statsTask.setParentTasks(parentTasks);
}
/**
* Returns dependencyTaskForMultiInsert initializing it if necessary.
*
* <p>dependencyTaskForMultiInsert serves as a mutual dependency for the final move tasks in a
* multi-insert query.
*
* @return
*/
public DependencyCollectionTask getDependencyTaskForMultiInsert() {
if (dependencyTaskForMultiInsert == null) {
dependencyTaskForMultiInsert =
(DependencyCollectionTask) TaskFactory.get(new DependencyCollectionWork(), conf);
}
return dependencyTaskForMultiInsert;
}
/**
* Add the StatsTask as a dependent task of the MoveTask because StatsTask will change the
* Table/Partition metadata. For atomicity, we should not change it before the data is actually
* there done by MoveTask.
*
* @param nd the FileSinkOperator whose results are taken care of by the MoveTask.
* @param mvTask The MoveTask that moves the FileSinkOperator's results.
* @param currTask The MapRedTask that the FileSinkOperator belongs to.
* @param hconf HiveConf
*/
private void addStatsTask(
FileSinkOperator nd, MoveTask mvTask, Task<? extends Serializable> currTask, HiveConf hconf) {
MoveWork mvWork = ((MoveTask) mvTask).getWork();
StatsWork statsWork = new StatsWork(mvWork.getLoadTableWork());
MapredWork mrWork = (MapredWork) currTask.getWork();
// AggKey in StatsWork is used for stats aggregation while StatsAggPrefix
// in FileSinkDesc is used for stats publishing. They should be consistent.
statsWork.setAggKey(((FileSinkOperator) nd).getConf().getStatsAggPrefix());
Task<? extends Serializable> statsTask = TaskFactory.get(statsWork, hconf);
// mark the MapredWork and FileSinkOperator for gathering stats
nd.getConf().setGatherStats(true);
mrWork.setGatheringStats(true);
// mrWork.addDestinationTable(nd.getConf().getTableInfo().getTableName());
// subscribe feeds from the MoveTask so that MoveTask can forward the list
// of dynamic partition list to the StatsTask
mvTask.addDependentTask(statsTask);
statsTask.subscribeFeed(mvTask);
}
/**
* Split the current plan by creating a temporary destination.
*
* @param op the reduce sink operator encountered
* @param opProcCtx processing context
*/
public static void splitPlan(ReduceSinkOperator op, GenMRProcContext opProcCtx)
throws SemanticException {
// Generate a new task
ParseContext parseCtx = opProcCtx.getParseCtx();
MapredWork cplan = getMapRedWork(parseCtx.getConf());
Task<? extends Serializable> redTask = TaskFactory.get(cplan, parseCtx.getConf());
Operator<? extends Serializable> reducer = op.getChildOperators().get(0);
// Add the reducer
cplan.setReducer(reducer);
ReduceSinkDesc desc = op.getConf();
cplan.setNumReduceTasks(new Integer(desc.getNumReducers()));
HashMap<Operator<? extends Serializable>, Task<? extends Serializable>> opTaskMap =
opProcCtx.getOpTaskMap();
opTaskMap.put(reducer, redTask);
Task<? extends Serializable> currTask = opProcCtx.getCurrTask();
splitTasks(op, currTask, redTask, opProcCtx, true, false, 0);
opProcCtx.getRootOps().add(op);
}
public static void mergeMapJoinUnion(UnionOperator union, GenMRProcContext ctx, int pos)
throws SemanticException {
ParseContext parseCtx = ctx.getParseCtx();
UnionProcContext uCtx = parseCtx.getUCtx();
UnionParseContext uPrsCtx = uCtx.getUnionParseContext(union);
assert uPrsCtx != null;
Task<? extends Serializable> currTask = ctx.getCurrTask();
GenMRUnionCtx uCtxTask = ctx.getUnionTask(union);
Task<? extends Serializable> uTask = null;
union.getParentOperators().get(pos);
MapredWork uPlan = null;
// union is encountered for the first time
if (uCtxTask == null) {
uCtxTask = new GenMRUnionCtx();
uPlan = GenMapRedUtils.getMapRedWork(parseCtx.getConf());
uTask = TaskFactory.get(uPlan, parseCtx.getConf());
uCtxTask.setUTask(uTask);
ctx.setUnionTask(union, uCtxTask);
} else {
uTask = uCtxTask.getUTask();
uPlan = (MapredWork) uTask.getWork();
}
// If there is a mapjoin at position 'pos'
if (uPrsCtx.getMapJoinSubq(pos)) {
GenMRMapJoinCtx mjCtx = ctx.getMapJoinCtx(ctx.getCurrMapJoinOp());
String taskTmpDir = mjCtx.getTaskTmpDir();
if (uPlan.getPathToAliases().get(taskTmpDir) == null) {
uPlan.getPathToAliases().put(taskTmpDir, new ArrayList<String>());
uPlan.getPathToAliases().get(taskTmpDir).add(taskTmpDir);
uPlan.getPathToPartitionInfo().put(taskTmpDir, new PartitionDesc(mjCtx.getTTDesc(), null));
uPlan.getAliasToWork().put(taskTmpDir, mjCtx.getRootMapJoinOp());
}
for (Task t : currTask.getParentTasks()) {
t.addDependentTask(uTask);
}
try {
boolean notDone = true;
while (notDone) {
for (Task t : currTask.getParentTasks()) {
t.removeDependentTask(currTask);
}
notDone = false;
}
} catch (ConcurrentModificationException e) {
}
} else {
setTaskPlan(ctx.getCurrAliasId(), ctx.getCurrTopOp(), uPlan, false, ctx);
}
ctx.setCurrTask(uTask);
ctx.setCurrAliasId(null);
ctx.setCurrTopOp(null);
ctx.setCurrMapJoinOp(null);
ctx.getMapCurrCtx().put(union, new GenMapRedCtx(ctx.getCurrTask(), null, null));
}
@SuppressWarnings("unchecked")
@Override
public Object process(
Node nd, Stack<Node> stack, NodeProcessorCtx procContext, Object... nodeOutputs)
throws SemanticException {
GenTezProcContext context = (GenTezProcContext) procContext;
TableScanOperator tableScan = (TableScanOperator) nd;
ParseContext parseContext = context.parseContext;
Class<? extends InputFormat> inputFormat =
tableScan.getConf().getTableMetadata().getInputFormatClass();
if (parseContext.getQueryProperties().isAnalyzeCommand()) {
assert tableScan.getChildOperators() == null || tableScan.getChildOperators().size() == 0;
String alias = null;
for (String a : parseContext.getTopOps().keySet()) {
if (tableScan == parseContext.getTopOps().get(a)) {
alias = a;
}
}
assert alias != null;
TezWork tezWork = context.currentTask.getWork();
if (inputFormat.equals(OrcInputFormat.class)) {
// For ORC, all the following statements are the same
// ANALYZE TABLE T [PARTITION (...)] COMPUTE STATISTICS
// ANALYZE TABLE T [PARTITION (...)] COMPUTE STATISTICS partialscan;
// ANALYZE TABLE T [PARTITION (...)] COMPUTE STATISTICS noscan;
// There will not be any Tez job above this task
StatsNoJobWork snjWork =
new StatsNoJobWork(tableScan.getConf().getTableMetadata().getTableSpec());
snjWork.setStatsReliable(
parseContext.getConf().getBoolVar(HiveConf.ConfVars.HIVE_STATS_RELIABLE));
// If partition is specified, get pruned partition list
Set<Partition> confirmedParts = GenMapRedUtils.getConfirmedPartitionsForScan(tableScan);
if (confirmedParts.size() > 0) {
Table source = tableScan.getConf().getTableMetadata();
List<String> partCols = GenMapRedUtils.getPartitionColumns(tableScan);
PrunedPartitionList partList =
new PrunedPartitionList(source, confirmedParts, partCols, false);
snjWork.setPrunedPartitionList(partList);
}
Task<StatsNoJobWork> snjTask = TaskFactory.get(snjWork, parseContext.getConf());
snjTask.setParentTasks(null);
context.rootTasks.remove(context.currentTask);
context.rootTasks.add(snjTask);
return true;
} else {
// ANALYZE TABLE T [PARTITION (...)] COMPUTE STATISTICS;
// The plan consists of a simple TezTask followed by a StatsTask.
// The Tez task is just a simple TableScanOperator
StatsWork statsWork = new StatsWork(tableScan.getConf().getTableMetadata().getTableSpec());
statsWork.setAggKey(tableScan.getConf().getStatsAggPrefix());
statsWork.setStatsTmpDir(tableScan.getConf().getTmpStatsDir());
statsWork.setSourceTask(context.currentTask);
statsWork.setStatsReliable(
parseContext.getConf().getBoolVar(HiveConf.ConfVars.HIVE_STATS_RELIABLE));
Task<StatsWork> statsTask = TaskFactory.get(statsWork, parseContext.getConf());
context.currentTask.addDependentTask(statsTask);
// ANALYZE TABLE T [PARTITION (...)] COMPUTE STATISTICS noscan;
// The plan consists of a StatsTask only.
if (parseContext.getQueryProperties().isNoScanAnalyzeCommand()) {
statsTask.setParentTasks(null);
statsWork.setNoScanAnalyzeCommand(true);
context.rootTasks.remove(context.currentTask);
context.rootTasks.add(statsTask);
}
// ANALYZE TABLE T [PARTITION (...)] COMPUTE STATISTICS partialscan;
if (parseContext.getQueryProperties().isPartialScanAnalyzeCommand()) {
handlePartialScanCommand(tableScan, parseContext, statsWork, context, statsTask);
}
// NOTE: here we should use the new partition predicate pushdown API to get a list of pruned
// list,
// and pass it to setTaskPlan as the last parameter
Set<Partition> confirmedPartns = GenMapRedUtils.getConfirmedPartitionsForScan(tableScan);
PrunedPartitionList partitions = null;
if (confirmedPartns.size() > 0) {
Table source = tableScan.getConf().getTableMetadata();
List<String> partCols = GenMapRedUtils.getPartitionColumns(tableScan);
partitions = new PrunedPartitionList(source, confirmedPartns, partCols, false);
}
MapWork w = utils.createMapWork(context, tableScan, tezWork, partitions);
w.setGatheringStats(true);
return true;
}
}
return null;
}
@Override
public void analyzeInternal(ASTNode ast) throws SemanticException {
isLocal = false;
isOverWrite = false;
Tree fromTree = ast.getChild(0);
Tree tableTree = ast.getChild(1);
if (ast.getChildCount() == 4) {
isLocal = true;
isOverWrite = true;
}
if (ast.getChildCount() == 3) {
if (ast.getChild(2).getText().toLowerCase().equals("local")) {
isLocal = true;
} else {
isOverWrite = true;
}
}
// initialize load path
URI fromURI;
try {
String fromPath = stripQuotes(fromTree.getText());
fromURI = initializeFromURI(fromPath);
} catch (IOException e) {
throw new SemanticException(ErrorMsg.INVALID_PATH.getMsg(fromTree, e.getMessage()), e);
} catch (URISyntaxException e) {
throw new SemanticException(ErrorMsg.INVALID_PATH.getMsg(fromTree, e.getMessage()), e);
}
// initialize destination table/partition
tableSpec ts = new tableSpec(db, conf, (ASTNode) tableTree);
if (ts.tableHandle.isOffline()) {
throw new SemanticException(
ErrorMsg.OFFLINE_TABLE_OR_PARTITION.getMsg(":Table " + ts.tableName));
}
if (ts.tableHandle.isView()) {
throw new SemanticException(ErrorMsg.DML_AGAINST_VIEW.getMsg());
}
if (ts.tableHandle.isNonNative()) {
throw new SemanticException(ErrorMsg.LOAD_INTO_NON_NATIVE.getMsg());
}
if (ts.tableHandle.isStoredAsSubDirectories()) {
throw new SemanticException(ErrorMsg.LOAD_INTO_STORED_AS_DIR.getMsg());
}
URI toURI =
(ts.partHandle != null)
? ts.partHandle.getDataLocation()
: ts.tableHandle.getDataLocation();
List<FieldSchema> parts = ts.tableHandle.getPartitionKeys();
if ((parts != null && parts.size() > 0) && (ts.partSpec == null || ts.partSpec.size() == 0)) {
throw new SemanticException(ErrorMsg.NEED_PARTITION_ERROR.getMsg());
}
// make sure the arguments make sense
applyConstraints(fromURI, toURI, fromTree, isLocal);
Task<? extends Serializable> rTask = null;
// create copy work
if (isLocal) {
// if the local keyword is specified - we will always make a copy. this
// might seem redundant in the case
// that the hive warehouse is also located in the local file system - but
// that's just a test case.
String copyURIStr = ctx.getExternalTmpFileURI(toURI);
URI copyURI = URI.create(copyURIStr);
rTask = TaskFactory.get(new CopyWork(fromURI.toString(), copyURIStr), conf);
fromURI = copyURI;
}
// create final load/move work
String loadTmpPath = ctx.getExternalTmpFileURI(toURI);
Map<String, String> partSpec = ts.getPartSpec();
if (partSpec == null) {
partSpec = new LinkedHashMap<String, String>();
outputs.add(new WriteEntity(ts.tableHandle));
} else {
try {
Partition part = Hive.get().getPartition(ts.tableHandle, partSpec, false);
if (part != null) {
if (part.isOffline()) {
throw new SemanticException(
ErrorMsg.OFFLINE_TABLE_OR_PARTITION.getMsg(ts.tableName + ":" + part.getName()));
}
outputs.add(new WriteEntity(part));
} else {
outputs.add(new WriteEntity(ts.tableHandle));
}
} catch (HiveException e) {
throw new SemanticException(e);
}
}
LoadTableDesc loadTableWork =
new LoadTableDesc(
fromURI.toString(),
loadTmpPath,
Utilities.getTableDesc(ts.tableHandle),
partSpec,
isOverWrite);
Task<? extends Serializable> childTask =
TaskFactory.get(new MoveWork(getInputs(), getOutputs(), loadTableWork, null, true), conf);
if (rTask != null) {
rTask.addDependentTask(childTask);
} else {
rTask = childTask;
}
rootTasks.add(rTask);
// The user asked for stats to be collected.
// Some stats like number of rows require a scan of the data
// However, some other stats, like number of files, do not require a complete scan
// Update the stats which do not require a complete scan.
Task<? extends Serializable> statTask = null;
if (conf.getBoolVar(HiveConf.ConfVars.HIVESTATSAUTOGATHER)) {
StatsWork statDesc = new StatsWork(loadTableWork);
statDesc.setNoStatsAggregator(true);
statDesc.setClearAggregatorStats(true);
statDesc.setStatsReliable(conf.getBoolVar(HiveConf.ConfVars.HIVE_STATS_RELIABLE));
statTask = TaskFactory.get(statDesc, conf);
}
// HIVE-3334 has been filed for load file with index auto update
if (HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVEINDEXAUTOUPDATE)) {
IndexUpdater indexUpdater = new IndexUpdater(loadTableWork, getInputs(), conf);
try {
List<Task<? extends Serializable>> indexUpdateTasks = indexUpdater.generateUpdateTasks();
for (Task<? extends Serializable> updateTask : indexUpdateTasks) {
// LOAD DATA will either have a copy & move or just a move,
// we always want the update to be dependent on the move
childTask.addDependentTask(updateTask);
if (statTask != null) {
updateTask.addDependentTask(statTask);
}
}
} catch (HiveException e) {
console.printInfo(
"WARNING: could not auto-update stale indexes, indexes are not out of sync");
}
} else if (statTask != null) {
childTask.addDependentTask(statTask);
}
}
/**
* Table Sink encountered.
*
* @param nd the table sink operator encountered
* @param opProcCtx context
*/
public Object process(
Node nd, Stack<Node> stack, NodeProcessorCtx opProcCtx, Object... nodeOutputs)
throws SemanticException {
TableScanOperator op = (TableScanOperator) nd;
GenMRProcContext ctx = (GenMRProcContext) opProcCtx;
ParseContext parseCtx = ctx.getParseCtx();
Class<? extends InputFormat> inputFormat =
op.getConf().getTableMetadata().getInputFormatClass();
Map<Operator<? extends OperatorDesc>, GenMapRedCtx> mapCurrCtx = ctx.getMapCurrCtx();
// create a dummy MapReduce task
MapredWork currWork = GenMapRedUtils.getMapRedWork(parseCtx);
MapRedTask currTask = (MapRedTask) TaskFactory.get(currWork, parseCtx.getConf());
Operator<? extends OperatorDesc> currTopOp = op;
ctx.setCurrTask(currTask);
ctx.setCurrTopOp(currTopOp);
for (String alias : parseCtx.getTopOps().keySet()) {
Operator<? extends OperatorDesc> currOp = parseCtx.getTopOps().get(alias);
if (currOp == op) {
String currAliasId = alias;
ctx.setCurrAliasId(currAliasId);
mapCurrCtx.put(op, new GenMapRedCtx(currTask, currAliasId));
if (parseCtx.getQueryProperties().isAnalyzeCommand()) {
boolean partialScan = parseCtx.getQueryProperties().isPartialScanAnalyzeCommand();
boolean noScan = parseCtx.getQueryProperties().isNoScanAnalyzeCommand();
if (inputFormat.equals(OrcInputFormat.class)) {
// For ORC, all the following statements are the same
// ANALYZE TABLE T [PARTITION (...)] COMPUTE STATISTICS
// ANALYZE TABLE T [PARTITION (...)] COMPUTE STATISTICS partialscan;
// ANALYZE TABLE T [PARTITION (...)] COMPUTE STATISTICS noscan;
// There will not be any MR or Tez job above this task
StatsNoJobWork snjWork =
new StatsNoJobWork(op.getConf().getTableMetadata().getTableSpec());
snjWork.setStatsReliable(
parseCtx.getConf().getBoolVar(HiveConf.ConfVars.HIVE_STATS_RELIABLE));
// If partition is specified, get pruned partition list
Set<Partition> confirmedParts = GenMapRedUtils.getConfirmedPartitionsForScan(op);
if (confirmedParts.size() > 0) {
Table source = op.getConf().getTableMetadata();
List<String> partCols = GenMapRedUtils.getPartitionColumns(op);
PrunedPartitionList partList =
new PrunedPartitionList(source, confirmedParts, partCols, false);
snjWork.setPrunedPartitionList(partList);
}
Task<StatsNoJobWork> snjTask = TaskFactory.get(snjWork, parseCtx.getConf());
ctx.setCurrTask(snjTask);
ctx.setCurrTopOp(null);
ctx.getRootTasks().clear();
ctx.getRootTasks().add(snjTask);
} else {
// ANALYZE TABLE T [PARTITION (...)] COMPUTE STATISTICS;
// The plan consists of a simple MapRedTask followed by a StatsTask.
// The MR task is just a simple TableScanOperator
StatsWork statsWork = new StatsWork(op.getConf().getTableMetadata().getTableSpec());
statsWork.setAggKey(op.getConf().getStatsAggPrefix());
statsWork.setSourceTask(currTask);
statsWork.setStatsReliable(
parseCtx.getConf().getBoolVar(HiveConf.ConfVars.HIVE_STATS_RELIABLE));
Task<StatsWork> statsTask = TaskFactory.get(statsWork, parseCtx.getConf());
currTask.addDependentTask(statsTask);
if (!ctx.getRootTasks().contains(currTask)) {
ctx.getRootTasks().add(currTask);
}
// ANALYZE TABLE T [PARTITION (...)] COMPUTE STATISTICS noscan;
// The plan consists of a StatsTask only.
if (noScan) {
statsTask.setParentTasks(null);
statsWork.setNoScanAnalyzeCommand(true);
ctx.getRootTasks().remove(currTask);
ctx.getRootTasks().add(statsTask);
}
// ANALYZE TABLE T [PARTITION (...)] COMPUTE STATISTICS partialscan;
if (partialScan) {
handlePartialScanCommand(op, ctx, parseCtx, currTask, statsWork, statsTask);
}
currWork.getMapWork().setGatheringStats(true);
if (currWork.getReduceWork() != null) {
currWork.getReduceWork().setGatheringStats(true);
}
// NOTE: here we should use the new partition predicate pushdown API to get a list of
// pruned list,
// and pass it to setTaskPlan as the last parameter
Set<Partition> confirmedPartns = GenMapRedUtils.getConfirmedPartitionsForScan(op);
if (confirmedPartns.size() > 0) {
Table source = op.getConf().getTableMetadata();
List<String> partCols = GenMapRedUtils.getPartitionColumns(op);
PrunedPartitionList partList =
new PrunedPartitionList(source, confirmedPartns, partCols, false);
GenMapRedUtils.setTaskPlan(currAliasId, currTopOp, currTask, false, ctx, partList);
} else { // non-partitioned table
GenMapRedUtils.setTaskPlan(currAliasId, currTopOp, currTask, false, ctx);
}
}
}
return true;
}
}
assert false;
return null;
}