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

Example 66 with SemanticRule

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

the class AnnotateWithStatistics method transform.

@Override
public ParseContext transform(ParseContext pctx) throws SemanticException {
    AnnotateStatsProcCtx aspCtx = new AnnotateStatsProcCtx(pctx);
    // create a walker which walks the tree in a BFS manner while maintaining the
    // operator stack. The dispatcher generates the plan from the operator tree
    Map<SemanticRule, SemanticNodeProcessor> opRules = new LinkedHashMap<SemanticRule, SemanticNodeProcessor>();
    opRules.put(new RuleRegExp("TS", TableScanOperator.getOperatorName() + "%"), StatsRulesProcFactory.getTableScanRule());
    opRules.put(new RuleRegExp("SEL", SelectOperator.getOperatorName() + "%"), StatsRulesProcFactory.getSelectRule());
    opRules.put(new RuleRegExp("FIL", FilterOperator.getOperatorName() + "%"), StatsRulesProcFactory.getFilterRule());
    opRules.put(new RuleRegExp("GBY", GroupByOperator.getOperatorName() + "%"), StatsRulesProcFactory.getGroupByRule());
    opRules.put(new RuleRegExp("JOIN", CommonJoinOperator.getOperatorName() + "%|" + MapJoinOperator.getOperatorName() + "%"), StatsRulesProcFactory.getJoinRule());
    opRules.put(new RuleRegExp("LIM", LimitOperator.getOperatorName() + "%"), StatsRulesProcFactory.getLimitRule());
    opRules.put(new RuleRegExp("RS", ReduceSinkOperator.getOperatorName() + "%"), StatsRulesProcFactory.getReduceSinkRule());
    opRules.put(new RuleRegExp("UDTF", UDTFOperator.getOperatorName() + "%"), StatsRulesProcFactory.getUDTFRule());
    opRules.put(new RuleRegExp("LVJ", LateralViewJoinOperator.getOperatorName() + "%"), StatsRulesProcFactory.getLateralViewJoinRule());
    // The dispatcher fires the processor corresponding to the closest matching
    // rule and passes the context along
    SemanticDispatcher disp = new DefaultRuleDispatcher(StatsRulesProcFactory.getDefaultRule(), opRules, aspCtx);
    SemanticGraphWalker ogw = new LevelOrderWalker(disp, 0);
    // Create a list of topop nodes
    ArrayList<Node> topNodes = new ArrayList<Node>();
    topNodes.addAll(pctx.getTopOps().values());
    ogw.startWalking(topNodes, null);
    return pctx;
}