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SOLR-1297: Added Sort By Function capability 

git-svn-id: https://svn.apache.org/repos/asf/lucene/solr/trunk@889997 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Grant Ingersoll 2009-12-12 23:00:27 +00:00
parent 3867797830
commit 0589889950
5 changed files with 430 additions and 55 deletions
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2
CHANGES.txt
View File

@ -58,6 +58,8 @@ New Features
* SOLR-1625: Add regexp support for TermsComponent (Uri Boness via noble)
* SOLR-1297: Add sort by Function capability (gsingers)
Optimizations
----------------------

145
src/java/org/apache/solr/search/QueryParsing.java
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@ -41,6 +41,7 @@ import org.apache.solr.schema.FieldType;
import org.apache.solr.schema.IndexSchema;
import org.apache.solr.schema.SchemaField;
import org.apache.solr.search.function.FunctionQuery;
import org.apache.solr.search.function.ValueSource;
import java.io.IOException;
import java.util.ArrayList;
@ -216,7 +217,6 @@ public class QueryParsing {
}
private static Pattern sortSep = Pattern.compile(",");
/**
* Returns null if the sortSpec is the standard sort desc.
@ -240,18 +240,84 @@ public class QueryParsing {
*/
public static Sort parseSort(String sortSpec, IndexSchema schema) {
if (sortSpec == null || sortSpec.length() == 0) return null;
char[] chars = sortSpec.toCharArray();
int i = 0;
StringBuilder buffer = new StringBuilder(sortSpec.length());
String sort = null;
String order = null;
int functionDepth = 0;
boolean score = true;
List<SortField> lst = new ArrayList<SortField>(5);
boolean needOrder = false;
while (i < chars.length) {
if (Character.isWhitespace(chars[i]) && functionDepth == 0) {
if (buffer.length() == 0) {
//do nothing
} else {
if (needOrder == false) {
sort = buffer.toString().trim();
buffer.setLength(0);
needOrder = true;
} else {
order = buffer.toString().trim();
buffer.setLength(0);
needOrder = false;
}
}
} else if (chars[i] == '(' && functionDepth == 0) {
buffer.append(chars[i]);
functionDepth++;
} else if (chars[i] == ')' && functionDepth > 0) {
buffer.append(chars[i]);
functionDepth--;//close up one layer
} else if (chars[i] == ',' && functionDepth == 0) {//can either be a separator of sort declarations, or a separator in a function
//we have a separator between sort declarations,
// We may need an order still, but then evaluate it, as we should have everything we need
if (needOrder == true && buffer.length() > 0){
order = buffer.toString().trim();
buffer.setLength(0);
needOrder = false;
}
score = processSort(schema, sort, order, lst);
sort = null;
order = null;
buffer.setLength(0);//get ready for the next one, if there is one
} else if (chars[i] == ',' && functionDepth > 0) {
//we are in a function
buffer.append(chars[i]);
} else {
//just a regular old char, add it to the buffer
buffer.append(chars[i]);
}
i++;
}
if (buffer.length() > 0 && needOrder){//see if we have anything left, at most it should be an order
order = buffer.toString().trim();
buffer.setLength(0);
needOrder = false;
}
String[] parts = sortSep.split(sortSpec.trim());
if (parts.length == 0) return null;
//do some sanity checks
if (functionDepth != 0){
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "Unable to parse sort spec, mismatched parentheses: " + sortSpec);
}
if (buffer.length() > 0){//there's something wrong, as everything should have been parsed by now
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "Unable to parse sort spec: " + sortSpec);
}
if (needOrder == false && sort != null && sort.equals("") == false && order != null && order.equals("") == false){//handle the last declaration
score = processSort(schema, sort, order, lst);
}
//If the normal case (by score desc) do nothing
if (lst.size() == 1 && score == true && lst.get(0).getReverse() == false) {
return null; // do normal scoring...
}
return new Sort((SortField[]) lst.toArray(new SortField[lst.size()]));
}
SortField[] lst = new SortField[parts.length];
for (int i = 0; i < parts.length; i++) {
String part = parts[i].trim();
private static boolean processSort(IndexSchema schema, String sort, String order, List<SortField> lst) {
boolean score = false;
if (sort != null && order != null) {
boolean top = true;
//determine the ordering, ascending or descending
int idx = part.indexOf(' ');
if (idx > 0) {
String order = part.substring(idx + 1).trim();
if ("desc".equals(order) || "top".equals(order)) {
top = true;
} else if ("asc".equals(order) || "bottom".equals(order)) {
@ -259,39 +325,60 @@ public class QueryParsing {
} else {
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "Unknown sort order: " + order);
}
part = part.substring(0, idx).trim();
} else {
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "Missing sort order.");
}
//figure out the field or score
if ("score".equals(part)) {
//we got the order, now deal with the sort
if ("score".equals(sort)) {
score = true;
if (top) {
// If there is only one thing in the list, just do the regular thing...
if (parts.length == 1) {
return null; // do normal scoring...
}
lst[i] = SortField.FIELD_SCORE;
lst.add(SortField.FIELD_SCORE);
} else {
lst[i] = new SortField(null, SortField.SCORE, true);
lst.add(new SortField(null, SortField.SCORE, true));
}
} else if (DOCID.equals(part)) {
lst[i] = new SortField(null, SortField.DOC, top);
} else if (DOCID.equals(sort)) {
lst.add(new SortField(null, SortField.DOC, top));
} else {
//See if we have a Field first, then see if it is a function, then throw an exception
// getField could throw an exception if the name isn't found
SchemaField f = null;
try {
f = schema.getField(part);
f = schema.getField(sort);
}
catch (SolrException e) {
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "can not sort on undefined field: " + part, e);
//Not an error just yet
}
if (f != null) {
if (f == null || !f.indexed()) {
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "can not sort on unindexed field: " + part);
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "can not sort on unindexed field: " + sort);
}
lst[i] = f.getType().getSortField(f, top);
lst.add(f.getType().getSortField(f, top));
} else {
//See if we have a function:
FunctionQuery query = null;
try {
query = parseFunction(sort, schema);
if (query != null) {
ValueSource valueSource = query.getValueSource();
//We have a function query
try {
lst.add(valueSource.getSortField(top));
} catch (IOException e) {
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "error getting the sort for this function: " + sort, e);
}
} else {
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "can not sort on undefined function: " + sort);
}
} catch (ParseException e) {
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "can not sort on undefined field or function: " + sort, e);
}
}
}
return new Sort(lst);
} else if (sort == null) {//no sort value
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST,
"Must declare sort field or function");
} else if (order == null) {
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "Missing sort order: ");
}
return score;
}

115
src/java/org/apache/solr/search/function/ValueSource.java
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@ -18,13 +18,19 @@
package org.apache.solr.search.function;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.*;
import org.apache.solr.search.function.DocValues;
import org.apache.lucene.search.Explanation;
import org.apache.lucene.search.FieldComparator;
import org.apache.lucene.search.FieldComparatorSource;
import org.apache.lucene.search.Scorer;
import org.apache.lucene.search.Searcher;
import org.apache.lucene.search.SortField;
import java.io.IOException;
import java.io.Serializable;
import java.util.IdentityHashMap;
import java.util.Map;
import java.util.HashMap;
import java.util.Collections;
/**
* Instantiates {@link org.apache.solr.search.function.DocValues} for a particular reader.
@ -40,7 +46,8 @@ public abstract class ValueSource implements Serializable {
return getValues(null, reader);
}
/** Gets the values for this reader and the context that was previously
/**
* Gets the values for this reader and the context that was previously
* passed to createWeight()
*/
public DocValues getValues(Map context, IndexReader reader) throws IOException {
@ -51,23 +58,113 @@ public abstract class ValueSource implements Serializable {
public abstract int hashCode();
/** description of field, used in explain() */
/**
* description of field, used in explain()
*/
public abstract String description();
public String toString() {
return description();
}
/** Implementations should propagate createWeight to sub-ValueSources which can optionally store
/**
* Get the SortField for this ValueSource. Uses the {@link #getValues(java.util.Map, org.apache.lucene.index.IndexReader)}
* to populate the SortField.
*
* @param reverse true if the order should be reversed.
* @return The {@link org.apache.lucene.search.SortField} for the ValueSource
* @throws IOException if there was a problem reading the values.
*/
public SortField getSortField(boolean reverse) throws IOException {
//should we pass in the description for the field name?
//Hmm, Lucene is going to intern whatever we pass in, not sure I like that
//and we can't pass in null, either, as that throws an illegal arg. exception
return new SortField(description(), new ValueSourceComparatorSource(), reverse);
}
/**
* Implementations should propagate createWeight to sub-ValueSources which can optionally store
* weight info in the context. The context object will be passed to getValues()
* where this info can be retrieved. */
* where this info can be retrieved.
*/
public void createWeight(Map context, Searcher searcher) throws IOException {
}
/** Returns a new non-threadsafe context map. */
/**
* Returns a new non-threadsafe context map.
*/
public static Map newContext() {
return new IdentityHashMap();
}
class ValueSourceComparatorSource extends FieldComparatorSource {
public ValueSourceComparatorSource() {
}
public FieldComparator newComparator(String fieldname, int numHits,
int sortPos, boolean reversed) throws IOException {
return new ValueSourceComparator(numHits);
}
}
/**
* Implement a {@link org.apache.lucene.search.FieldComparator} that works
* off of the {@link org.apache.solr.search.function.DocValues} for a ValueSource
* instead of the normal Lucene FieldComparator that works off of a FieldCache.
*/
class ValueSourceComparator extends FieldComparator {
private final double[] values;
private DocValues docVals;
private double bottom;
ValueSourceComparator(int numHits) {
values = new double[numHits];
}
public int compare(int slot1, int slot2) {
final double v1 = values[slot1];
final double v2 = values[slot2];
if (v1 > v2) {
return 1;
} else if (v1 < v2) {
return -1;
} else {
return 0;
}
}
public int compareBottom(int doc) {
final double v2 = docVals.doubleVal(doc);
if (bottom > v2) {
return 1;
} else if (bottom < v2) {
return -1;
} else {
return 0;
}
}
public void copy(int slot, int doc) {
values[slot] = docVals.doubleVal(doc);
}
public void setNextReader(IndexReader reader, int docBase) throws IOException {
docVals = getValues(Collections.emptyMap(), reader);
}
public void setBottom(final int bottom) {
this.bottom = values[bottom];
}
public Comparable value(int slot) {
return Double.valueOf(values[slot]);
}
}
}
@ -86,7 +183,9 @@ class ValueSourceScorer extends Scorer {
setCheckDeletes(true);
}
public IndexReader getReader() { return reader; }
public IndexReader getReader() {
return reader;
}
public void setCheckDeletes(boolean checkDeletes) {
this.checkDeletes = checkDeletes && reader.hasDeletions();

95
src/test/org/apache/solr/search/QueryParsingTest.java
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@ -43,8 +43,14 @@ public class QueryParsingTest extends AbstractSolrTestCase {
IndexSchema schema = h.getCore().getSchema();
sort = QueryParsing.parseSort("score desc", schema);
assertNull("sort", sort);//only 1 thing in the list, no Sort specified
sort = QueryParsing.parseSort("weight desc", schema);
sort = QueryParsing.parseSort("score asc", schema);
SortField[] flds = sort.getSort();
assertEquals(flds[0].getType(), SortField.SCORE);
assertTrue(flds[0].getReverse());
sort = QueryParsing.parseSort("weight desc", schema);
flds = sort.getSort();
assertEquals(flds[0].getType(), SortField.FLOAT);
assertEquals(flds[0].getField(), "weight");
assertEquals(flds[0].getReverse(), true);
@ -79,13 +85,71 @@ public class QueryParsingTest extends AbstractSolrTestCase {
flds = sort.getSort();
assertEquals(flds[0].getType(), SortField.FLOAT);
assertEquals(flds[0].getField(), "weight");
assertEquals(flds[1].getType(), SortField.LONG);
assertEquals(flds[1].getField(), "bday");
assertEquals(flds[1].getType(), SortField.LONG);
//handles trailing commas
sort = QueryParsing.parseSort("weight desc,", schema);
flds = sort.getSort();
assertEquals(flds[0].getType(), SortField.FLOAT);
assertEquals(flds[0].getField(), "weight");
//test functions
sort = QueryParsing.parseSort("pow(weight, 2) desc", schema);
flds = sort.getSort();
assertEquals(flds[0].getType(), SortField.CUSTOM);
//Not thrilled about the fragility of string matching here, but...
//the value sources get wrapped, so the out field is different than the input
assertEquals(flds[0].getField(), "pow(float(weight),const(2.0))");
sort = QueryParsing.parseSort("pow(weight, 2) desc", schema);
flds = sort.getSort();
assertEquals(flds[0].getType(), SortField.CUSTOM);
//Not thrilled about the fragility of string matching here, but...
//the value sources get wrapped, so the out field is different than the input
assertEquals(flds[0].getField(), "pow(float(weight),const(2.0))");
sort = QueryParsing.parseSort("pow(weight, 2) desc, weight desc, bday asc", schema);
flds = sort.getSort();
assertEquals(flds[0].getType(), SortField.CUSTOM);
//Not thrilled about the fragility of string matching here, but...
//the value sources get wrapped, so the out field is different than the input
assertEquals(flds[0].getField(), "pow(float(weight),const(2.0))");
assertEquals(flds[1].getType(), SortField.FLOAT);
assertEquals(flds[1].getField(), "weight");
assertEquals(flds[2].getField(), "bday");
assertEquals(flds[2].getType(), SortField.LONG);
//handles trailing commas
sort = QueryParsing.parseSort("weight desc,", schema);
flds = sort.getSort();
assertEquals(flds[0].getType(), SortField.FLOAT);
assertEquals(flds[0].getField(), "weight");
try {
//bad number of parens, but the function parser can handle an extra close
sort = QueryParsing.parseSort("pow(weight,2)) desc, bday asc", schema);
} catch (SolrException e) {
assertTrue(false);
}
//Test literals in functions
sort = QueryParsing.parseSort("strdist(foo_s, \"junk\", jw) desc", schema);
flds = sort.getSort();
assertEquals(flds[0].getType(), SortField.CUSTOM);
//the value sources get wrapped, so the out field is different than the input
assertEquals(flds[0].getField(), "strdist(str(foo_s),literal(junk), dist=org.apache.lucene.search.spell.JaroWinklerDistance)");
sort = QueryParsing.parseSort("", schema);
assertNull(sort);
}
public void testBad() throws Exception {
Sort sort;
IndexSchema schema = h.getCore().getSchema();
//test some bad vals
try {
sort = QueryParsing.parseSort("weight, desc", schema);
@ -93,12 +157,39 @@ public class QueryParsingTest extends AbstractSolrTestCase {
} catch (SolrException e) {
//expected
}
try {
sort = QueryParsing.parseSort("w", schema);
assertTrue(false);
} catch (SolrException e) {
//expected
}
try {
sort = QueryParsing.parseSort("weight desc, bday", schema);
assertTrue(false);
} catch (SolrException e) {
}
try {
//bad number of commas
sort = QueryParsing.parseSort("pow(weight,,2) desc, bday asc", schema);
assertTrue(false);
} catch (SolrException e) {
}
try {
//bad function
sort = QueryParsing.parseSort("pow() desc, bday asc", schema);
assertTrue(false);
} catch (SolrException e) {
}
try {
//bad number of parens
sort = QueryParsing.parseSort("pow((weight,2) desc, bday asc", schema);
assertTrue(false);
} catch (SolrException e) {
}
}
}

96
src/test/org/apache/solr/search/function/SortByFunctionTest.java Normal file
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@ -0,0 +1,96 @@
package org.apache.solr.search.function;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import org.apache.solr.util.AbstractSolrTestCase;
/**
*
*
**/
public class SortByFunctionTest extends AbstractSolrTestCase {
public String getSchemaFile() {
return "schema.xml";
}
public String getSolrConfigFile() {
return "solrconfig.xml";
}
public void test() throws Exception {
assertU(adoc("id", "1", "x_td", "0", "y_td", "2", "w_td", "25", "z_td", "5", "f_t", "ipod"));
assertU(adoc("id", "2", "x_td", "2", "y_td", "2", "w_td", "15", "z_td", "5", "f_t", "ipod ipod ipod ipod ipod"));
assertU(adoc("id", "3", "x_td", "3", "y_td", "2", "w_td", "55", "z_td", "5", "f_t", "ipod ipod ipod ipod ipod ipod ipod ipod ipod"));
assertU(adoc("id", "4", "x_td", "4", "y_td", "2", "w_td", "45", "z_td", "5", "f_t", "ipod ipod ipod ipod ipod ipod ipod"));
assertU(commit());
assertQ(req("fl", "*,score", "q", "*:*"),
"//*[@numFound='4']",
"//float[@name='score']='1.0'",
"//result/doc[1]/int[@name='id'][.='1']",
"//result/doc[2]/int[@name='id'][.='2']",
"//result/doc[3]/int[@name='id'][.='3']",
"//result/doc[4]/int[@name='id'][.='4']"
);
assertQ(req("fl", "*,score", "q", "*:*", "sort", "score desc"),
"//*[@numFound='4']",
"//float[@name='score']='1.0'",
"//result/doc[1]/int[@name='id'][.='1']",
"//result/doc[2]/int[@name='id'][.='2']",
"//result/doc[3]/int[@name='id'][.='3']",
"//result/doc[4]/int[@name='id'][.='4']"
);
assertQ(req("fl", "id,score", "q", "f_t:ipod", "sort", "score desc"),
"//*[@numFound='4']",
"//result/doc[1]/int[@name='id'][.='1']",
"//result/doc[2]/int[@name='id'][.='4']",
"//result/doc[3]/int[@name='id'][.='2']",
"//result/doc[4]/int[@name='id'][.='3']"
);
assertQ(req("fl", "*,score", "q", "*:*", "sort", "sum(x_td, y_td) desc"),
"//*[@numFound='4']",
"//float[@name='score']='1.0'",
"//result/doc[1]/int[@name='id'][.='4']",
"//result/doc[2]/int[@name='id'][.='3']",
"//result/doc[3]/int[@name='id'][.='2']",
"//result/doc[4]/int[@name='id'][.='1']"
);
assertQ(req("fl", "*,score", "q", "*:*", "sort", "sum(x_td, y_td) asc"),
"//*[@numFound='4']",
"//float[@name='score']='1.0'",
"//result/doc[1]/int[@name='id'][.='1']",
"//result/doc[2]/int[@name='id'][.='2']",
"//result/doc[3]/int[@name='id'][.='3']",
"//result/doc[4]/int[@name='id'][.='4']"
);
//the function is equal, w_td separates
assertQ(req("q", "*:*", "fl", "id", "sort", "sum(z_td, y_td) asc, w_td asc"),
"//*[@numFound='4']",
"//result/doc[1]/int[@name='id'][.='2']",
"//result/doc[2]/int[@name='id'][.='1']",
"//result/doc[3]/int[@name='id'][.='4']",
"//result/doc[4]/int[@name='id'][.='3']"
);
}
}
/*
<lst name="responseHeader"><int name="status">0</int><int name="QTime">93</int></lst><result name="response" numFound="4" start="0" maxScore="1.0"><doc><float name="score">1.0</float><int name="id">4</int><int name="intDefault">42</int><arr name="multiDefault"><str>muLti-Default</str></arr><date name="timestamp">2009-12-12T12:59:46.412Z</date><arr name="x_td"><double>4.0</double></arr><arr name="y_td"><double>2.0</double></arr></doc><doc><float name="score">1.0</float><int name="id">3</int><int name="intDefault">42</int><arr name="multiDefault"><str>muLti-Default</str></arr><date name="timestamp">2009-12-12T12:59:46.409Z</date><arr name="x_td"><double>3.0</double></arr><arr name="y_td"><double>2.0</double></arr></doc><doc><float name="score">1.0</float><int name="id">2</int><int name="intDefault">42</int><arr name="multiDefault"><str>muLti-Default</str></arr><date name="timestamp">2009-12-12T12:59:46.406Z</date><arr name="x_td"><double>2.0</double></arr><arr name="y_td"><double>2.0</double></arr></doc><doc><float name="score">1.0</float><int name="id">1</int><int name="intDefault">42</int><arr name="multiDefault"><str>muLti-Default</str></arr><date name="timestamp">2009-12-12T12:59:46.361Z</date><arr name="x_td"><double>0.0</double></arr><arr name="y_td"><double>2.0</double></arr></doc></result>
*/