dsmiley commented on a change in pull request #1171: SOLR-13892: Add
'top-level' docValues Join implementation
URL: https://github.com/apache/lucene-solr/pull/1171#discussion_r370281149
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File path: solr/core/src/java/org/apache/solr/search/JoinQParserPlugin.java
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@@ -59,67 +60,124 @@
import org.apache.solr.search.join.ScoreJoinQParserPlugin;
import org.apache.solr.util.RTimer;
import org.apache.solr.util.RefCounted;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
public class JoinQParserPlugin extends QParserPlugin {
+ private static final Logger log =
LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+
public static final String NAME = "join";
+ /** Choose the internal algorithm */
+ private static final String METHOD = "method";
+
+ private static class JoinParams {
+ final String fromField;
+ final String fromCore;
+ final Query fromQuery;
+ final long fromCoreOpenTime;
+ final String toField;
+
+ public JoinParams(String fromField, String fromCore, Query fromQuery, long
fromCoreOpenTime, String toField) {
+ this.fromField = fromField;
+ this.fromCore = fromCore;
+ this.fromQuery = fromQuery;
+ this.fromCoreOpenTime = fromCoreOpenTime;
+ this.toField = toField;
+ }
+ }
+
+ private enum Method {
+ index {
+ @Override
+ Query makeFilter(QParser qparser) throws SyntaxError {
+ final JoinParams jParams = parseJoin(qparser);
+ final JoinQuery q = new JoinQuery(jParams.fromField, jParams.toField,
jParams.fromCore, jParams.fromQuery);
+ q.fromCoreOpenTime = jParams.fromCoreOpenTime;
+ return q;
+ }
+ },
+ dvWithScore {
+ @Override
+ Query makeFilter(QParser qparser) throws SyntaxError {
+ return new ScoreJoinQParserPlugin().createParser(qparser.qstr,
qparser.localParams, qparser.params, qparser.req).parse();
+ }
+ },
+ topLevelDV {
+ @Override
+ Query makeFilter(QParser qparser) throws SyntaxError {
+ final JoinParams jParams = parseJoin(qparser);
+ final JoinQuery q = new TopLevelJoinQuery(jParams.fromField,
jParams.toField, jParams.fromCore, jParams.fromQuery);
+ q.fromCoreOpenTime = jParams.fromCoreOpenTime;
+ return q;
+ }
+ };
+
+ abstract Query makeFilter(QParser qparser) throws SyntaxError;
+
+ JoinParams parseJoin(QParser qparser) throws SyntaxError {
+ final String fromField = qparser.getParam("from");
+ final String fromIndex = qparser.getParam("fromIndex");
+ final String toField = qparser.getParam("to");
+ final String v = qparser.localParams.get("v");
Review comment:
Use `QueryParsing.V` thus also signals this isn't special
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