SQL: Improve painless script generated from IN (#35055)

Replace standard `||` and `==` painless operators with new `in` method introduced in `InternalSqlScriptUtils`. This allows the list of values to become a script variable which is replaced each time with the list of values provided by the user. Move In to the same package as InPipe & InProcessor Follow up to #34750 Co-authored-by: Costin Leau <costin.leau@gmail.com>
elastic · Nov 1, 2018 · c94aeef · c94aeef
1 parent e350f0a
commit c94aeef
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Showing 19 changed files with 79 additions and 81 deletions.
diff --git a/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/analysis/analyzer/Verifier.java b/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/analysis/analyzer/Verifier.java
@@ -19,7 +19,7 @@
 import org.elasticsearch.xpack.sql.expression.function.Functions;
 import org.elasticsearch.xpack.sql.expression.function.Score;
 import org.elasticsearch.xpack.sql.expression.function.scalar.ScalarFunction;
-import org.elasticsearch.xpack.sql.expression.predicate.In;
+import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.In;
 import org.elasticsearch.xpack.sql.plan.logical.Aggregate;
 import org.elasticsearch.xpack.sql.plan.logical.Distinct;
 import org.elasticsearch.xpack.sql.plan.logical.Filter;

diff --git a/.../sql/src/main/java/org/elasticsearch/xpack/sql/expression/function/scalar/Processors.java b/.../sql/src/main/java/org/elasticsearch/xpack/sql/expression/function/scalar/Processors.java
@@ -88,4 +88,12 @@ public static List<NamedWriteableRegistry.Entry> getNamedWriteables() {
         entries.add(new Entry(Processor.class, SubstringFunctionProcessor.NAME, SubstringFunctionProcessor::new));
         return entries;
     }
-}
+
+    public static List<Object> process(List<Processor> processors, Object input) {
+        List<Object> values = new ArrayList<>(processors.size());
+        for (Processor p : processors) {
+            values.add(p.process(input));
+        }
+        return values;
+    }
+}
diff --git a/.../elasticsearch/xpack/sql/expression/function/scalar/whitelist/InternalSqlScriptUtils.java b/.../elasticsearch/xpack/sql/expression/function/scalar/whitelist/InternalSqlScriptUtils.java
@@ -27,10 +27,12 @@
 import org.elasticsearch.xpack.sql.expression.predicate.operator.arithmetic.BinaryArithmeticProcessor.BinaryArithmeticOperation;
 import org.elasticsearch.xpack.sql.expression.predicate.operator.arithmetic.UnaryArithmeticProcessor.UnaryArithmeticOperation;
 import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.BinaryComparisonProcessor.BinaryComparisonOperation;
+import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.InProcessor;
 import org.elasticsearch.xpack.sql.expression.predicate.regex.RegexProcessor.RegexOperation;
 import org.elasticsearch.xpack.sql.util.StringUtils;
 
 import java.time.ZonedDateTime;
+import java.util.List;
 import java.util.Map;
 
 /**
@@ -113,6 +115,10 @@ public static Boolean notNull(Object expression) {
         return IsNotNullProcessor.apply(expression);
     }
 
+    public static Boolean in(Object value, List<Object> values) {
+        return InProcessor.apply(value, values);
+    }
+
     //
     // Regex
     //
@@ -375,4 +381,4 @@ public static String substring(String s, Number start, Number length) {
     public static String ucase(String s) {
         return (String) StringOperation.UCASE.apply(s);
     }
-}
+}
diff --git a/...k/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/expression/gen/script/Scripts.java b/...k/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/expression/gen/script/Scripts.java
@@ -87,4 +87,4 @@ public static ScriptTemplate binaryMethod(String methodName, ScriptTemplate left
                     .build(),
                 dataType);
     }
-}
+}
diff --git a/...ch/xpack/sql/expression/predicate/In.java → ...ion/predicate/operator/comparison/In.java b/...ch/xpack/sql/expression/predicate/In.java → ...ion/predicate/operator/comparison/In.java
@@ -3,20 +3,17 @@
  * or more contributor license agreements. Licensed under the Elastic License;
  * you may not use this file except in compliance with the Elastic License.
  */
-package org.elasticsearch.xpack.sql.expression.predicate;
+package org.elasticsearch.xpack.sql.expression.predicate.operator.comparison;
 
 import org.elasticsearch.xpack.sql.expression.Attribute;
 import org.elasticsearch.xpack.sql.expression.Expression;
 import org.elasticsearch.xpack.sql.expression.Expressions;
+import org.elasticsearch.xpack.sql.expression.Foldables;
 import org.elasticsearch.xpack.sql.expression.NamedExpression;
 import org.elasticsearch.xpack.sql.expression.function.scalar.ScalarFunctionAttribute;
 import org.elasticsearch.xpack.sql.expression.gen.pipeline.Pipe;
-import org.elasticsearch.xpack.sql.expression.gen.script.Params;
-import org.elasticsearch.xpack.sql.expression.gen.script.ParamsBuilder;
 import org.elasticsearch.xpack.sql.expression.gen.script.ScriptTemplate;
 import org.elasticsearch.xpack.sql.expression.gen.script.ScriptWeaver;
-import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.Comparisons;
-import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.InPipe;
 import org.elasticsearch.xpack.sql.tree.Location;
 import org.elasticsearch.xpack.sql.tree.NodeInfo;
 import org.elasticsearch.xpack.sql.type.DataType;
@@ -30,7 +27,6 @@
 import java.util.StringJoiner;
 import java.util.stream.Collectors;
 
-import static java.lang.String.format;
 import static org.elasticsearch.xpack.sql.expression.gen.script.ParamsBuilder.paramsBuilder;
 
 public class In extends NamedExpression implements ScriptWeaver {
@@ -84,24 +80,12 @@ public boolean foldable() {
 
     @Override
     public Boolean fold() {
-        if (value.dataType() == DataType.NULL) {
+        // Optimization for early return and Query folding to LocalExec
+        if (value.dataType() == DataType.NULL ||
+            list.size() == 1 && list.get(0).dataType() == DataType.NULL) {
             return null;
         }
-        if (list.size() == 1 && list.get(0).dataType() == DataType.NULL) {
-            return false;
-        }
-
-        Object foldedLeftValue = value.fold();
-        Boolean result = false;
-        for (Expression rightValue : list) {
-            Boolean compResult = Comparisons.eq(foldedLeftValue, rightValue.fold());
-            if (compResult == null) {
-                result = null;
-            } else if (compResult) {
-                return true;
-            }
-        }
-        return result;
+        return InProcessor.apply(value.fold(), Foldables.valuesOf(list, value.dataType()));
     }
 
     @Override
@@ -122,34 +106,18 @@ public Attribute toAttribute() {
 
     @Override
     public ScriptTemplate asScript() {
-        StringJoiner sj = new StringJoiner(" || ");
         ScriptTemplate leftScript = asScript(value);
-        List<Params> rightParams = new ArrayList<>();
-        String scriptPrefix = leftScript + "==";
-        LinkedHashSet<Object> values = list.stream().map(Expression::fold).collect(Collectors.toCollection(LinkedHashSet::new));
-        for (Object valueFromList : values) {
-            // if checked against null => false
-            if (valueFromList != null) {
-                if (valueFromList instanceof Expression) {
-                    ScriptTemplate rightScript = asScript((Expression) valueFromList);
-                    sj.add(scriptPrefix + rightScript.template());
-                    rightParams.add(rightScript.params());
-                } else {
-                    if (valueFromList instanceof String) {
-                        sj.add(scriptPrefix + '"' + valueFromList + '"');
-                    } else {
-                        sj.add(scriptPrefix + valueFromList.toString());
-                    }
-                }
-            }
-        }
-
-        ParamsBuilder paramsBuilder = paramsBuilder().script(leftScript.params());
-        for (Params p : rightParams) {
-            paramsBuilder = paramsBuilder.script(p);
-        }
-
-        return new ScriptTemplate(format(Locale.ROOT, "%s", sj.toString()), paramsBuilder.build(), dataType());
+        // remove duplicates
+        List<Object> values = new ArrayList<>(new LinkedHashSet<>(Foldables.valuesOf(list, value.dataType())));
+        values.removeIf(Objects::isNull);
+
+        return new ScriptTemplate(
+            formatTemplate(String.format(Locale.ROOT, "{sql}.in(%s, {})", leftScript.template())),
+            paramsBuilder()
+                .script(leftScript.params())
+                .variable(values)
+                .build(),
+            dataType());
     }
 
     @Override

diff --git a/...ava/org/elasticsearch/xpack/sql/expression/predicate/operator/comparison/InProcessor.java b/...ava/org/elasticsearch/xpack/sql/expression/predicate/operator/comparison/InProcessor.java
@@ -7,6 +7,7 @@
 
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
+import org.elasticsearch.xpack.sql.expression.function.scalar.Processors;
 import org.elasticsearch.xpack.sql.expression.gen.processor.Processor;
 
 import java.io.IOException;
@@ -19,7 +20,7 @@ public class InProcessor implements Processor {
 
     private final List<Processor> processsors;
 
-    public InProcessor(List<Processor> processors) {
+    InProcessor(List<Processor> processors) {
         this.processsors = processors;
     }
 
@@ -40,14 +41,17 @@ public final void writeTo(StreamOutput out) throws IOException {
     @Override
     public Object process(Object input) {
         Object leftValue = processsors.get(processsors.size() - 1).process(input);
-        Boolean result = false;
+        return apply(leftValue, Processors.process(processsors.subList(0, processsors.size() - 1), leftValue));
+    }
 
-        for (int i = 0; i < processsors.size() - 1; i++) {
-            Boolean compResult = Comparisons.eq(leftValue, processsors.get(i).process(input));
+    public static Boolean apply(Object input, List<Object> values) {
+        Boolean result = Boolean.FALSE;
+        for (Object v : values) {
+            Boolean compResult = Comparisons.eq(input, v);
             if (compResult == null) {
                 result = null;
-            } else if (compResult) {
-                return true;
+            } else if (compResult == Boolean.TRUE) {
+                return Boolean.TRUE;
             }
         }
         return result;

diff --git a/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/optimizer/Optimizer.java b/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/optimizer/Optimizer.java
@@ -39,7 +39,6 @@
 import org.elasticsearch.xpack.sql.expression.predicate.BinaryOperator;
 import org.elasticsearch.xpack.sql.expression.predicate.BinaryOperator.Negateable;
 import org.elasticsearch.xpack.sql.expression.predicate.BinaryPredicate;
-import org.elasticsearch.xpack.sql.expression.predicate.In;
 import org.elasticsearch.xpack.sql.expression.predicate.IsNotNull;
 import org.elasticsearch.xpack.sql.expression.predicate.Predicates;
 import org.elasticsearch.xpack.sql.expression.predicate.Range;
@@ -50,6 +49,7 @@
 import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.Equals;
 import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.GreaterThan;
 import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.GreaterThanOrEqual;
+import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.In;
 import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.LessThan;
 import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.LessThanOrEqual;
 import org.elasticsearch.xpack.sql.plan.logical.Aggregate;

diff --git a/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/parser/ExpressionBuilder.java b/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/parser/ExpressionBuilder.java
@@ -24,7 +24,7 @@
 import org.elasticsearch.xpack.sql.expression.function.Function;
 import org.elasticsearch.xpack.sql.expression.function.UnresolvedFunction;
 import org.elasticsearch.xpack.sql.expression.function.scalar.Cast;
-import org.elasticsearch.xpack.sql.expression.predicate.In;
+import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.In;
 import org.elasticsearch.xpack.sql.expression.predicate.IsNotNull;
 import org.elasticsearch.xpack.sql.expression.predicate.Range;
 import org.elasticsearch.xpack.sql.expression.predicate.fulltext.MatchQueryPredicate;

diff --git a/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/planner/QueryFolder.java b/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/planner/QueryFolder.java
@@ -30,7 +30,7 @@
 import org.elasticsearch.xpack.sql.expression.gen.pipeline.Pipe;
 import org.elasticsearch.xpack.sql.expression.gen.pipeline.UnaryPipe;
 import org.elasticsearch.xpack.sql.expression.gen.processor.Processor;
-import org.elasticsearch.xpack.sql.expression.predicate.In;
+import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.In;
 import org.elasticsearch.xpack.sql.plan.physical.AggregateExec;
 import org.elasticsearch.xpack.sql.plan.physical.EsQueryExec;
 import org.elasticsearch.xpack.sql.plan.physical.FilterExec;

diff --git a/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/planner/QueryTranslator.java b/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/planner/QueryTranslator.java
@@ -31,7 +31,7 @@
 import org.elasticsearch.xpack.sql.expression.function.scalar.datetime.DateTimeFunction;
 import org.elasticsearch.xpack.sql.expression.function.scalar.datetime.DateTimeHistogramFunction;
 import org.elasticsearch.xpack.sql.expression.gen.script.ScriptTemplate;
-import org.elasticsearch.xpack.sql.expression.predicate.In;
+import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.In;
 import org.elasticsearch.xpack.sql.expression.predicate.IsNotNull;
 import org.elasticsearch.xpack.sql.expression.predicate.Range;
 import org.elasticsearch.xpack.sql.expression.predicate.fulltext.MatchQueryPredicate;

diff --git a/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/querydsl/query/TermsQuery.java b/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/querydsl/query/TermsQuery.java
@@ -9,7 +9,7 @@
 import org.elasticsearch.xpack.sql.expression.Expression;
 import org.elasticsearch.xpack.sql.expression.Foldables;
 import org.elasticsearch.xpack.sql.tree.Location;
-import org.elasticsearch.xpack.sql.type.DataType;
+import org.elasticsearch.xpack.sql.type.DataTypes;
 
 import java.util.Collections;
 import java.util.LinkedHashSet;
@@ -27,7 +27,7 @@ public class TermsQuery extends LeafQuery {
     public TermsQuery(Location location, String term, List<Expression> values) {
         super(location);
         this.term = term;
-        values.removeIf(e -> e.dataType() == DataType.NULL);
+        values.removeIf(e -> DataTypes.isNull(e.dataType()));
         if (values.isEmpty()) {
             this.values = Collections.emptySet();
         } else {

diff --git a/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/type/DataTypeConversion.java b/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/type/DataTypeConversion.java
@@ -105,6 +105,9 @@ public static Conversion conversionFor(DataType from, DataType to) {
         if (to == DataType.NULL) {
             return Conversion.NULL;
         }
+        if (from == DataType.NULL) {
+            return Conversion.NULL;
+        }
 
         Conversion conversion = conversion(from, to);
         if (conversion == null) {

diff --git a/x-pack/plugin/sql/src/main/resources/org/elasticsearch/xpack/sql/plugin/sql_whitelist.txt b/x-pack/plugin/sql/src/main/resources/org/elasticsearch/xpack/sql/plugin/sql_whitelist.txt
@@ -24,6 +24,7 @@ class org.elasticsearch.xpack.sql.expression.function.scalar.whitelist.InternalS
   Boolean lte(Object, Object)
   Boolean gt(Object, Object)
   Boolean gte(Object, Object)
+  Boolean in(Object, java.util.List)
 
 #
 # Logical
@@ -107,4 +108,4 @@ class org.elasticsearch.xpack.sql.expression.function.scalar.whitelist.InternalS
   String  space(Number)
   String  substring(String, Number, Number)
   String  ucase(String)
-}
+}
diff --git a/...xpression/predicate/InProcessorTests.java → ...operator/comparison/InProcessorTests.java b/...xpression/predicate/InProcessorTests.java → ...operator/comparison/InProcessorTests.java
@@ -3,15 +3,14 @@
  * or more contributor license agreements. Licensed under the Elastic License;
  * you may not use this file except in compliance with the Elastic License.
  */
-package org.elasticsearch.xpack.sql.expression.predicate;
+package org.elasticsearch.xpack.sql.expression.predicate.operator.comparison;
 
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.io.stream.Writeable.Reader;
 import org.elasticsearch.test.AbstractWireSerializingTestCase;
 import org.elasticsearch.xpack.sql.expression.Literal;
 import org.elasticsearch.xpack.sql.expression.function.scalar.Processors;
 import org.elasticsearch.xpack.sql.expression.gen.processor.ConstantProcessor;
-import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.InProcessor;
 
 import java.util.Arrays;
 

diff --git a/...ack/sql/expression/predicate/InTests.java → ...redicate/operator/comparison/InTests.java b/...ack/sql/expression/predicate/InTests.java → ...redicate/operator/comparison/InTests.java
@@ -3,7 +3,7 @@
  * or more contributor license agreements. Licensed under the Elastic License;
  * you may not use this file except in compliance with the Elastic License.
  */
-package org.elasticsearch.xpack.sql.expression.predicate;
+package org.elasticsearch.xpack.sql.expression.predicate.operator.comparison;
 
 import org.elasticsearch.test.ESTestCase;
 import org.elasticsearch.xpack.sql.expression.Literal;

diff --git a/x-pack/plugin/sql/src/test/java/org/elasticsearch/xpack/sql/optimizer/OptimizerTests.java b/x-pack/plugin/sql/src/test/java/org/elasticsearch/xpack/sql/optimizer/OptimizerTests.java
@@ -35,7 +35,7 @@
 import org.elasticsearch.xpack.sql.expression.function.scalar.string.Ascii;
 import org.elasticsearch.xpack.sql.expression.function.scalar.string.Repeat;
 import org.elasticsearch.xpack.sql.expression.predicate.BinaryOperator;
-import org.elasticsearch.xpack.sql.expression.predicate.In;
+import org.elasticsearch.xpack.sql.expression.predicate.operator.comparison.In;
 import org.elasticsearch.xpack.sql.expression.predicate.IsNotNull;
 import org.elasticsearch.xpack.sql.expression.predicate.Range;
 import org.elasticsearch.xpack.sql.expression.predicate.logical.And;
@@ -345,7 +345,7 @@ public void testConstantFoldingIn_LeftValueNotFoldable() {
     public void testConstantFoldingIn_RightValueIsNull() {
         In in = new In(EMPTY, getFieldAttribute(), Arrays.asList(NULL, NULL));
         Literal result= (Literal) new ConstantFolding().rule(in);
-        assertEquals(false, result.value());
+        assertNull(result.value());
     }
 
     public void testConstantFoldingIn_LeftValueIsNull() {

diff --git a/...ck/plugin/sql/src/test/java/org/elasticsearch/xpack/sql/planner/QueryTranslatorTests.java b/...ck/plugin/sql/src/test/java/org/elasticsearch/xpack/sql/planner/QueryTranslatorTests.java
@@ -33,6 +33,7 @@
 import java.util.Map;
 import java.util.TimeZone;
 
+import static org.hamcrest.Matchers.endsWith;
 import static org.hamcrest.core.StringStartsWith.startsWith;
 
 public class QueryTranslatorTests extends ESTestCase {
@@ -208,12 +209,11 @@ public void testTranslateInExpression_WhereClause_Painless() {
         QueryTranslation translation = QueryTranslator.toQuery(condition, false);
         assertNull(translation.aggFilter);
         assertTrue(translation.query instanceof ScriptQuery);
-        ScriptQuery sq = (ScriptQuery) translation.query;
-        assertEquals("InternalSqlScriptUtils.nullSafeFilter(" +
-            "InternalSqlScriptUtils.power(InternalSqlScriptUtils.docValue(doc,params.v0),params.v1)==10 || " +
-            "InternalSqlScriptUtils.power(InternalSqlScriptUtils.docValue(doc,params.v0),params.v1)==20)",
-            sq.script().toString());
-        assertEquals("[{v=int}, {v=2}]", sq.script().params().toString());
+        ScriptQuery sc = (ScriptQuery) translation.query;
+        assertEquals("InternalSqlScriptUtils.nullSafeFilter(InternalSqlScriptUtils.in(" +
+                "InternalSqlScriptUtils.power(InternalSqlScriptUtils.docValue(doc,params.v0),params.v1), params.v2))",
+            sc.script().toString());
+        assertEquals("[{v=int}, {v=2}, {v=[10.0, 20.0]}]", sc.script().params().toString());
     }
 
     public void testTranslateInExpression_HavingClause_Painless() {
@@ -225,9 +225,10 @@ public void testTranslateInExpression_HavingClause_Painless() {
         QueryTranslation translation = QueryTranslator.toQuery(condition, true);
         assertNull(translation.query);
         AggFilter aggFilter = translation.aggFilter;
-        assertEquals("InternalSqlScriptUtils.nullSafeFilter(params.a0==10 || params.a0==20)",
+        assertEquals("InternalSqlScriptUtils.nullSafeFilter(InternalSqlScriptUtils.in(params.a0, params.v0))",
             aggFilter.scriptTemplate().toString());
         assertThat(aggFilter.scriptTemplate().params().toString(), startsWith("[{a=MAX(int){a->"));
+        assertThat(aggFilter.scriptTemplate().params().toString(), endsWith(", {v=[10, 20]}]"));
     }
 
     public void testTranslateInExpression_HavingClause_PainlessOneArg() {
@@ -239,9 +240,10 @@ public void testTranslateInExpression_HavingClause_PainlessOneArg() {
         QueryTranslation translation = QueryTranslator.toQuery(condition, true);
         assertNull(translation.query);
         AggFilter aggFilter = translation.aggFilter;
-        assertEquals("InternalSqlScriptUtils.nullSafeFilter(params.a0==10)",
+        assertEquals("InternalSqlScriptUtils.nullSafeFilter(InternalSqlScriptUtils.in(params.a0, params.v0))",
             aggFilter.scriptTemplate().toString());
         assertThat(aggFilter.scriptTemplate().params().toString(), startsWith("[{a=MAX(int){a->"));
+        assertThat(aggFilter.scriptTemplate().params().toString(), endsWith(", {v=[10]}]"));
 
     }
 
@@ -254,8 +256,9 @@ public void testTranslateInExpression_HavingClause_PainlessAndNullHandling() {
         QueryTranslation translation = QueryTranslator.toQuery(condition, true);
         assertNull(translation.query);
         AggFilter aggFilter = translation.aggFilter;
-        assertEquals("InternalSqlScriptUtils.nullSafeFilter(params.a0==10 || params.a0==20 || params.a0==30)",
+        assertEquals("InternalSqlScriptUtils.nullSafeFilter(InternalSqlScriptUtils.in(params.a0, params.v0))",
             aggFilter.scriptTemplate().toString());
         assertThat(aggFilter.scriptTemplate().params().toString(), startsWith("[{a=MAX(int){a->"));
+        assertThat(aggFilter.scriptTemplate().params().toString(), endsWith(", {v=[10, 20, 30]}]"));
     }
 }