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

Example 16 with DefaultGraphWalker

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

the class BucketMapJoinOptimizer method transform.

public ParseContext transform(ParseContext pctx) throws SemanticException {
    Map<Rule, NodeProcessor> opRules = new LinkedHashMap<Rule, NodeProcessor>();
    BucketJoinProcCtx bucketMapJoinOptimizeCtx = new BucketJoinProcCtx(pctx.getConf());
    // process map joins with no reducers pattern
    opRules.put(new RuleRegExp("R1", MapJoinOperator.getOperatorName() + "%"), getBucketMapjoinProc(pctx));
    // The dispatcher fires the processor corresponding to the closest matching
    // rule and passes the context along
    Dispatcher disp = new DefaultRuleDispatcher(getDefaultProc(), opRules, bucketMapJoinOptimizeCtx);
    GraphWalker ogw = new DefaultGraphWalker(disp);
    // Create a list of topop nodes
    List<Node> topNodes = new ArrayList<Node>();
    topNodes.addAll(pctx.getTopOps().values());
    ogw.startWalking(topNodes, null);
    return pctx;
}

Example 17 with DefaultGraphWalker

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

the class BucketingSortingReduceSinkOptimizer method transform.

@Override
public ParseContext transform(ParseContext pctx) throws SemanticException {
    Map<Rule, NodeProcessor> opRules = new LinkedHashMap<Rule, NodeProcessor>();
    // process reduce sink added by hive.enforce.bucketing or hive.enforce.sorting
    opRules.put(new RuleRegExp("R1", ReduceSinkOperator.getOperatorName() + "%" + SelectOperator.getOperatorName() + "%" + FileSinkOperator.getOperatorName() + "%"), getBucketSortReduceSinkProc(pctx));
    // The dispatcher fires the processor corresponding to the closest matching rule
    Dispatcher disp = new DefaultRuleDispatcher(getDefaultProc(), opRules, null);
    GraphWalker ogw = new DefaultGraphWalker(disp);
    // Create a list of top nodes
    ArrayList<Node> topNodes = new ArrayList<Node>();
    topNodes.addAll(pctx.getTopOps().values());
    ogw.startWalking(topNodes, null);
    return pctx;
}

Example 18 with DefaultGraphWalker

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

the class SparkReduceSinkMapJoinProc method hasGroupBy.

private boolean hasGroupBy(Operator<? extends OperatorDesc> mapjoinOp, GenSparkProcContext context) throws SemanticException {
    List<Operator<? extends OperatorDesc>> childOps = mapjoinOp.getChildOperators();
    Map<Rule, NodeProcessor> rules = new LinkedHashMap<Rule, NodeProcessor>();
    SparkMapJoinFollowedByGroupByProcessor processor = new SparkMapJoinFollowedByGroupByProcessor();
    rules.put(new RuleRegExp("GBY", GroupByOperator.getOperatorName() + "%"), processor);
    Dispatcher disp = new DefaultRuleDispatcher(null, rules, context);
    GraphWalker ogw = new DefaultGraphWalker(disp);
    ArrayList<Node> topNodes = new ArrayList<Node>();
    topNodes.addAll(childOps);
    ogw.startWalking(topNodes, null);
    return processor.getHasGroupBy();
}

Example 19 with DefaultGraphWalker

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

the class SkewJoinResolver method resolve.

@Override
public PhysicalContext resolve(PhysicalContext pctx) throws SemanticException {
    Dispatcher disp = new SkewJoinTaskDispatcher(pctx);
    GraphWalker ogw = new DefaultGraphWalker(disp);
    ArrayList<Node> topNodes = new ArrayList<Node>();
    topNodes.addAll(pctx.getRootTasks());
    ogw.startWalking(topNodes, null);
    return pctx;
}

Example 20 with DefaultGraphWalker

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

the class MetadataOnlyOptimizer 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() + "%"), new TableScanProcessor());
    opRules.put(new RuleRegExp("R2", GroupByOperator.getOperatorName() + "%.*" + FileSinkOperator.getOperatorName() + "%"), new FileSinkProcessor());
    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);
    return pctx;
}