Examples with Dispatcher org.apache.hadoop.hive.ql.lib.Dispatcher used on opensource projects

Example 86 with Dispatcher

use of org.apache.hadoop.hive.ql.lib.Dispatcher in project hive by apache.

the class Generator method transform.

/* (non-Javadoc)
   * @see org.apache.hadoop.hive.ql.optimizer.Transform#transform(org.apache.hadoop.hive.ql.parse.ParseContext)
   */
@Override
public ParseContext transform(ParseContext pctx) throws SemanticException {
    if (hooks != null && hooks.contains(ATLAS_HOOK_CLASSNAME)) {
        // Atlas would be interested in lineage information for insert,load,create etc.
        if (!pctx.getQueryProperties().isCTAS() && !pctx.getQueryProperties().isMaterializedView() && pctx.getQueryProperties().isQuery() && pctx.getCreateTable() == null && pctx.getCreateViewDesc() == null && (pctx.getLoadTableWork() == null || pctx.getLoadTableWork().isEmpty())) {
            LOG.debug("Not evaluating lineage");
            return pctx;
        }
    }
    Index index = pctx.getQueryState().getLineageState().getIndex();
    if (index == null) {
        index = new Index();
    }
    long sTime = System.currentTimeMillis();
    // Create the lineage context
    LineageCtx lCtx = new LineageCtx(pctx, index);
    Map<Rule, NodeProcessor> opRules = new LinkedHashMap<Rule, NodeProcessor>();
    opRules.put(new RuleRegExp("R1", TableScanOperator.getOperatorName() + "%"), OpProcFactory.getTSProc());
    opRules.put(new RuleRegExp("R2", ScriptOperator.getOperatorName() + "%"), OpProcFactory.getTransformProc());
    opRules.put(new RuleRegExp("R3", UDTFOperator.getOperatorName() + "%"), OpProcFactory.getTransformProc());
    opRules.put(new RuleRegExp("R4", SelectOperator.getOperatorName() + "%"), OpProcFactory.getSelProc());
    opRules.put(new RuleRegExp("R5", GroupByOperator.getOperatorName() + "%"), OpProcFactory.getGroupByProc());
    opRules.put(new RuleRegExp("R6", UnionOperator.getOperatorName() + "%"), OpProcFactory.getUnionProc());
    opRules.put(new RuleRegExp("R7", CommonJoinOperator.getOperatorName() + "%|" + MapJoinOperator.getOperatorName() + "%"), OpProcFactory.getJoinProc());
    opRules.put(new RuleRegExp("R8", ReduceSinkOperator.getOperatorName() + "%"), OpProcFactory.getReduceSinkProc());
    opRules.put(new RuleRegExp("R9", LateralViewJoinOperator.getOperatorName() + "%"), OpProcFactory.getLateralViewJoinProc());
    opRules.put(new RuleRegExp("R10", PTFOperator.getOperatorName() + "%"), OpProcFactory.getTransformProc());
    opRules.put(new RuleRegExp("R11", FilterOperator.getOperatorName() + "%"), OpProcFactory.getFilterProc());
    // The dispatcher fires the processor corresponding to the closest matching rule and passes the context along
    Dispatcher disp = new DefaultRuleDispatcher(OpProcFactory.getDefaultProc(), opRules, lCtx);
    GraphWalker ogw = new LevelOrderWalker(disp, 2);
    // Create a list of topop nodes
    ArrayList<Node> topNodes = new ArrayList<Node>();
    topNodes.addAll(pctx.getTopOps().values());
    ogw.startWalking(topNodes, null);
    LOG.debug("Time taken for lineage transform={}", (System.currentTimeMillis() - sTime));
    return pctx;
}

Example 87 with Dispatcher

use of org.apache.hadoop.hive.ql.lib.Dispatcher in project hive by apache.

the class PcrExprProcFactory method walkExprTree.

/**
 * Remove partition conditions when necessary from the the expression tree.
 *
 * @param tabAlias
 *          the table alias
 * @param parts
 *          the list of all pruned partitions for the table
 * @param vcs
 *          virtual columns referenced
 * @param pred
 *          expression tree of the target filter operator
 * @return the node information of the root expression
 * @throws SemanticException
 */
public static NodeInfoWrapper walkExprTree(String tabAlias, ArrayList<Partition> parts, List<VirtualColumn> vcs, ExprNodeDesc pred) throws SemanticException {
    // Create the walker, the rules dispatcher and the context.
    PcrExprProcCtx pprCtx = new PcrExprProcCtx(tabAlias, parts, vcs);
    Map<Rule, NodeProcessor> exprRules = new LinkedHashMap<Rule, NodeProcessor>();
    exprRules.put(new RuleRegExp("R1", ExprNodeColumnDesc.class.getName() + "%"), getColumnProcessor());
    exprRules.put(new RuleRegExp("R2", ExprNodeFieldDesc.class.getName() + "%"), getFieldProcessor());
    exprRules.put(new RuleRegExp("R5", ExprNodeGenericFuncDesc.class.getName() + "%"), getGenericFuncProcessor());
    // The dispatcher fires the processor corresponding to the closest matching
    // rule and passes the context along
    Dispatcher disp = new DefaultRuleDispatcher(getDefaultExprProcessor(), exprRules, pprCtx);
    GraphWalker egw = new DefaultGraphWalker(disp);
    List<Node> startNodes = new ArrayList<Node>();
    startNodes.add(pred);
    HashMap<Node, Object> outputMap = new HashMap<Node, Object>();
    egw.startWalking(startNodes, outputMap);
    // Return the wrapper of the root node
    return (NodeInfoWrapper) outputMap.get(pred);
}

Example 88 with Dispatcher

use of org.apache.hadoop.hive.ql.lib.Dispatcher in project hive by apache.

the class BucketingSortingInferenceOptimizer method inferBucketingSorting.

/**
 * For each map reduce task, if it has a reducer, infer whether or not the final output of the
 * reducer is bucketed and/or sorted
 *
 * @param mapRedTasks
 * @throws SemanticException
 */
private void inferBucketingSorting(List<ExecDriver> mapRedTasks) throws SemanticException {
    for (ExecDriver mapRedTask : mapRedTasks) {
        // of the outputs of intermediate map reduce jobs.
        if (!mapRedTask.getWork().isFinalMapRed()) {
            continue;
        }
        if (mapRedTask.getWork().getReduceWork() == null) {
            continue;
        }
        Operator<? extends OperatorDesc> reducer = mapRedTask.getWork().getReduceWork().getReducer();
        // uses sampling, which means it's not bucketed
        boolean disableBucketing = mapRedTask.getWork().getMapWork().getSamplingType() > 0;
        BucketingSortingCtx bCtx = new BucketingSortingCtx(disableBucketing);
        // RuleRegExp rules are used to match operators anywhere in the tree
        // RuleExactMatch rules are used to specify exactly what the tree should look like
        // In particular, this guarantees that the first operator is the reducer
        // (and its parent(s) are ReduceSinkOperators) since it begins walking the tree from
        // the reducer.
        Map<Rule, NodeProcessor> opRules = new LinkedHashMap<Rule, NodeProcessor>();
        opRules.put(new RuleRegExp("R1", SelectOperator.getOperatorName() + "%"), BucketingSortingOpProcFactory.getSelProc());
        // Matches only GroupByOperators which are reducers, rather than map group by operators,
        // or multi group by optimization specific operators
        opRules.put(new RuleExactMatch("R2", new String[] { GroupByOperator.getOperatorName() }), BucketingSortingOpProcFactory.getGroupByProc());
        // Matches only JoinOperators which are reducers, rather than map joins, SMB map joins, etc.
        opRules.put(new RuleExactMatch("R3", new String[] { JoinOperator.getOperatorName() }), BucketingSortingOpProcFactory.getJoinProc());
        opRules.put(new RuleRegExp("R5", FileSinkOperator.getOperatorName() + "%"), BucketingSortingOpProcFactory.getFileSinkProc());
        opRules.put(new RuleRegExp("R7", FilterOperator.getOperatorName() + "%"), BucketingSortingOpProcFactory.getFilterProc());
        opRules.put(new RuleRegExp("R8", LimitOperator.getOperatorName() + "%"), BucketingSortingOpProcFactory.getLimitProc());
        opRules.put(new RuleRegExp("R9", LateralViewForwardOperator.getOperatorName() + "%"), BucketingSortingOpProcFactory.getLateralViewForwardProc());
        opRules.put(new RuleRegExp("R10", LateralViewJoinOperator.getOperatorName() + "%"), BucketingSortingOpProcFactory.getLateralViewJoinProc());
        // Matches only ForwardOperators which are preceded by some other operator in the tree,
        // in particular it can't be a reducer (and hence cannot be one of the ForwardOperators
        // added by the multi group by optimization)
        opRules.put(new RuleRegExp("R11", ".+" + ForwardOperator.getOperatorName() + "%"), BucketingSortingOpProcFactory.getForwardProc());
        // Matches only ForwardOperators which are reducers and are followed by GroupByOperators
        // (specific to the multi group by optimization)
        opRules.put(new RuleExactMatch("R12", new String[] { ForwardOperator.getOperatorName(), GroupByOperator.getOperatorName() }), BucketingSortingOpProcFactory.getMultiGroupByProc());
        // The dispatcher fires the processor corresponding to the closest matching rule and passes
        // the context along
        Dispatcher disp = new DefaultRuleDispatcher(BucketingSortingOpProcFactory.getDefaultProc(), opRules, bCtx);
        GraphWalker ogw = new PreOrderWalker(disp);
        // Create a list of topop nodes
        ArrayList<Node> topNodes = new ArrayList<Node>();
        topNodes.add(reducer);
        ogw.startWalking(topNodes, null);
        mapRedTask.getWork().getMapWork().getBucketedColsByDirectory().putAll(bCtx.getBucketedColsByDirectory());
        mapRedTask.getWork().getMapWork().getSortedColsByDirectory().putAll(bCtx.getSortedColsByDirectory());
    }
}

Example 89 with Dispatcher

use of org.apache.hadoop.hive.ql.lib.Dispatcher in project hive by apache.

the class NullScanOptimizer method resolve.

@Override
public PhysicalContext resolve(PhysicalContext pctx) throws SemanticException {
    Map<Rule, NodeProcessor> opRules = new LinkedHashMap<Rule, NodeProcessor>();
    opRules.put(new RuleRegExp("R1", TableScanOperator.getOperatorName() + "%.*" + FilterOperator.getOperatorName() + "%"), new WhereFalseProcessor());
    Dispatcher disp = new NullScanTaskDispatcher(pctx, opRules);
    GraphWalker ogw = new DefaultGraphWalker(disp);
    ArrayList<Node> topNodes = new ArrayList<Node>();
    topNodes.addAll(pctx.getRootTasks());
    ogw.startWalking(topNodes, null);
    opRules.clear();
    opRules.put(new RuleRegExp("R1", TableScanOperator.getOperatorName() + "%"), new TSMarker());
    opRules.put(new RuleRegExp("R2", LimitOperator.getOperatorName() + "%"), new Limit0Processor());
    disp = new NullScanTaskDispatcher(pctx, opRules);
    ogw = new DefaultGraphWalker(disp);
    topNodes = new ArrayList<Node>();
    topNodes.addAll(pctx.getRootTasks());
    ogw.startWalking(topNodes, null);
    return pctx;
}

Example 90 with Dispatcher

use of org.apache.hadoop.hive.ql.lib.Dispatcher in project hive by apache.

the class TezCompiler method removeSemiJoinCyclesDueToMapsideJoins.

private static void removeSemiJoinCyclesDueToMapsideJoins(OptimizeTezProcContext procCtx) throws SemanticException {
    if (!procCtx.conf.getBoolVar(ConfVars.TEZ_DYNAMIC_SEMIJOIN_REDUCTION) || procCtx.parseContext.getRsToSemiJoinBranchInfo().size() == 0) {
        return;
    }
    Map<Rule, NodeProcessor> opRules = new LinkedHashMap<Rule, NodeProcessor>();
    opRules.put(new RuleRegExp("R1", MapJoinOperator.getOperatorName() + "%" + MapJoinOperator.getOperatorName() + "%"), new SemiJoinCycleRemovalDueToMapsideJoins());
    opRules.put(new RuleRegExp("R2", MapJoinOperator.getOperatorName() + "%" + CommonMergeJoinOperator.getOperatorName() + "%"), new SemiJoinCycleRemovalDueToMapsideJoins());
    opRules.put(new RuleRegExp("R3", CommonMergeJoinOperator.getOperatorName() + "%" + MapJoinOperator.getOperatorName() + "%"), new SemiJoinCycleRemovalDueToMapsideJoins());
    opRules.put(new RuleRegExp("R4", CommonMergeJoinOperator.getOperatorName() + "%" + CommonMergeJoinOperator.getOperatorName() + "%"), new SemiJoinCycleRemovalDueToMapsideJoins());
    SemiJoinCycleRemovalDueTOMapsideJoinContext ctx = new SemiJoinCycleRemovalDueTOMapsideJoinContext();
    Dispatcher disp = new DefaultRuleDispatcher(null, opRules, ctx);
    List<Node> topNodes = new ArrayList<Node>();
    topNodes.addAll(procCtx.parseContext.getTopOps().values());
    GraphWalker ogw = new PreOrderOnceWalker(disp);
    ogw.startWalking(topNodes, null);
    // process the list
    ParseContext pCtx = procCtx.parseContext;
    for (Operator<?> parentJoin : ctx.childParentMap.keySet()) {
        Operator<?> childJoin = ctx.childParentMap.get(parentJoin);
        if (parentJoin.getChildOperators().size() == 1) {
            continue;
        }
        for (Operator<?> child : parentJoin.getChildOperators()) {
            if (!(child instanceof SelectOperator)) {
                continue;
            }
            while (child.getChildOperators().size() > 0) {
                child = child.getChildOperators().get(0);
            }
            if (!(child instanceof ReduceSinkOperator)) {
                continue;
            }
            ReduceSinkOperator rs = ((ReduceSinkOperator) child);
            SemiJoinBranchInfo sjInfo = pCtx.getRsToSemiJoinBranchInfo().get(rs);
            if (sjInfo == null) {
                continue;
            }
            TableScanOperator ts = sjInfo.getTsOp();
            // cycle with childJoin.
            for (Operator<?> parent : childJoin.getParentOperators()) {
                if (parent == parentJoin) {
                    continue;
                }
                assert parent instanceof ReduceSinkOperator;
                while (parent.getParentOperators().size() > 0) {
                    parent = parent.getParentOperators().get(0);
                }
                if (parent == ts) {
                    // We have a cycle!
                    if (sjInfo.getIsHint()) {
                        throw new SemanticException("Removing hinted semijoin as it is creating cycles with mapside joins " + rs + " : " + ts);
                    }
                    if (LOG.isDebugEnabled()) {
                        LOG.debug("Semijoin cycle due to mapjoin. Removing semijoin " + OperatorUtils.getOpNamePretty(rs) + " - " + OperatorUtils.getOpNamePretty(ts));
                    }
                    GenTezUtils.removeBranch(rs);
                    GenTezUtils.removeSemiJoinOperator(pCtx, rs, ts);
                }
            }
        }
    }
}