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new 38dabca23 feat: implement ISO-GQL SAME predicate for element identity
compariso… (#692)
38dabca23 is described below
commit 38dabca238cff216893999eb95ecd53ba9457199
Author: Weichen Zhao <[email protected]>
AuthorDate: Thu Feb 5 17:05:59 2026 +0800
feat: implement ISO-GQL SAME predicate for element identity compariso…
(#692)
* feat: implement ISO-GQL SAME predicate for element identity comparison
(#368)
Implement the ISO-GQL SAME predicate function to check if graph elements
refer to the same entity by comparing their identities. This feature adds
full ISO/IEC 39075:2024 Section 19.12 compliance for identity comparisons.
Changes:
- Parser Layer:
* Add SqlSameCall AST node for SAME function calls
* Add SqlSameOperator with BOOLEAN return type and VARIADIC operands
* Register operator in BuildInSqlOperatorTable
* Add syntax tests with 4 GQL test cases
- Runtime Layer:
* Implement GeaFlowBuiltinFunctions.same() for identity comparison
- Vertex comparison: compares vertex IDs using Objects.equals()
- Edge comparison: compares both source and target IDs
- Null handling: returns null following SQL ternary logic
- Type safety: returns false for mismatched types
* Add BuildInExpression.SAME constant for expression translation
* Register SAME in ExpressionTranslator.processOtherTrans()
- Testing:
* Add comprehensive SameTest with 13 unit tests (100% pass rate)
* Test coverage: identical/different IDs, null handling, mixed types,
string IDs, invalid types
Implementation follows Approach 1 (Built-in Function Pattern) with
minimal code changes (441 lines added across 9 files) for maximum
simplicity and maintainability.
Example usage:
MATCH (a)->(b)->(c) WHERE SAME(a, c) RETURN a, b, c;
* fix(dsl): resolve ISO-GQL SAME predicate code review issues
- Fix SqlSameCall immutable operands list causing setOperand() failure
- Add type-specific same() overloads for RowVertex and RowEdge
- Add varargs same(Object...) for multi-element comparisons
- Add comprehensive unit tests for all same() overloads
---
.../geaflow/dsl/operator/SqlSameOperator.java | 78 +++++++
.../apache/geaflow/dsl/sqlnode/SqlSameCall.java | 131 +++++++++++
.../org/apache/geaflow/dsl/IsoGqlSyntaxTest.java | 7 +
.../IsoGQLSame.sql} | 19 +-
.../schema/function/BuildInSqlOperatorTable.java | 5 +-
.../schema/function/GeaFlowBuiltinFunctions.java | 88 +++++++
.../geaflow/dsl/schema/function/SameTest.java | 255 +++++++++++++++++++++
.../dsl/runtime/expression/BuildInExpression.java | 2 +
.../runtime/expression/ExpressionTranslator.java | 3 +
9 files changed, 572 insertions(+), 16 deletions(-)
diff --git
a/geaflow/geaflow-dsl/geaflow-dsl-parser/src/main/java/org/apache/geaflow/dsl/operator/SqlSameOperator.java
b/geaflow/geaflow-dsl/geaflow-dsl-parser/src/main/java/org/apache/geaflow/dsl/operator/SqlSameOperator.java
new file mode 100644
index 000000000..699f03e92
--- /dev/null
+++
b/geaflow/geaflow-dsl/geaflow-dsl-parser/src/main/java/org/apache/geaflow/dsl/operator/SqlSameOperator.java
@@ -0,0 +1,78 @@
+/*
+ * 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.
+ */
+
+package org.apache.geaflow.dsl.operator;
+
+import org.apache.calcite.sql.SqlCall;
+import org.apache.calcite.sql.SqlFunction;
+import org.apache.calcite.sql.SqlFunctionCategory;
+import org.apache.calcite.sql.SqlKind;
+import org.apache.calcite.sql.SqlLiteral;
+import org.apache.calcite.sql.SqlNode;
+import org.apache.calcite.sql.SqlWriter;
+import org.apache.calcite.sql.parser.SqlParserPos;
+import org.apache.calcite.sql.type.OperandTypes;
+import org.apache.calcite.sql.type.ReturnTypes;
+import org.apache.geaflow.dsl.sqlnode.SqlSameCall;
+
+/**
+ * SqlOperator for the ISO-GQL SAME predicate function.
+ *
+ * <p>This operator represents the SAME function which checks element identity.
+ *
+ * <p>Syntax: SAME(element1, element2, ...)
+ *
+ * <p>Returns: BOOLEAN - TRUE if all element references point to the same
element,
+ * FALSE otherwise.
+ *
+ * <p>Implements ISO/IEC 39075:2024 Section 19.12.
+ */
+public class SqlSameOperator extends SqlFunction {
+
+ public static final SqlSameOperator INSTANCE = new SqlSameOperator();
+
+ private SqlSameOperator() {
+ super(
+ "SAME",
+ SqlKind.OTHER_FUNCTION,
+ ReturnTypes.BOOLEAN,
+ null,
+ // At least 2 operands, all must be of comparable types
+ OperandTypes.VARIADIC,
+ SqlFunctionCategory.USER_DEFINED_FUNCTION
+ );
+ }
+
+ @Override
+ public SqlCall createCall(
+ SqlLiteral functionQualifier,
+ SqlParserPos pos,
+ SqlNode... operands) {
+ return new SqlSameCall(pos, java.util.Arrays.asList(operands));
+ }
+
+ @Override
+ public void unparse(
+ SqlWriter writer,
+ SqlCall call,
+ int leftPrec,
+ int rightPrec) {
+ call.unparse(writer, leftPrec, rightPrec);
+ }
+}
diff --git
a/geaflow/geaflow-dsl/geaflow-dsl-parser/src/main/java/org/apache/geaflow/dsl/sqlnode/SqlSameCall.java
b/geaflow/geaflow-dsl/geaflow-dsl-parser/src/main/java/org/apache/geaflow/dsl/sqlnode/SqlSameCall.java
new file mode 100644
index 000000000..7e4d5d545
--- /dev/null
+++
b/geaflow/geaflow-dsl/geaflow-dsl-parser/src/main/java/org/apache/geaflow/dsl/sqlnode/SqlSameCall.java
@@ -0,0 +1,131 @@
+/*
+ * 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.
+ */
+
+package org.apache.geaflow.dsl.sqlnode;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import org.apache.calcite.sql.SqlCall;
+import org.apache.calcite.sql.SqlNode;
+import org.apache.calcite.sql.SqlOperator;
+import org.apache.calcite.sql.SqlWriter;
+import org.apache.calcite.sql.parser.SqlParserPos;
+import org.apache.calcite.sql.validate.SqlValidator;
+import org.apache.calcite.sql.validate.SqlValidatorScope;
+import org.apache.geaflow.dsl.operator.SqlSameOperator;
+
+/**
+ * SqlNode representing the ISO-GQL SAME predicate function.
+ *
+ * <p>The SAME predicate checks if multiple element references point to the
same
+ * graph element (identity check, not value equality).
+ *
+ * <p>Syntax: SAME(element_ref1, element_ref2 [, element_ref3, ...])
+ *
+ * <p>Example:
+ * <pre>
+ * MATCH (a:Person)-[:KNOWS]->(b), (b)-[:KNOWS]->(c)
+ * WHERE SAME(a, c)
+ * RETURN a.name, b.name;
+ * </pre>
+ *
+ * <p>This returns triangular paths where the start and end vertices are the
same element.
+ *
+ * <p>Implements ISO/IEC 39075:2024 Section 19.12 (SAME predicate).
+ */
+public class SqlSameCall extends SqlCall {
+
+ private final List<SqlNode> operands;
+
+ /**
+ * Creates a SqlSameCall.
+ *
+ * @param pos Parser position
+ * @param operands List of element reference expressions (must be 2 or
more)
+ */
+ public SqlSameCall(SqlParserPos pos, List<SqlNode> operands) {
+ super(pos);
+ // Create a mutable copy to allow setOperand to work
+ this.operands = new ArrayList<>(Objects.requireNonNull(operands,
"operands"));
+
+ // ISO-GQL requires at least 2 arguments
+ if (operands.size() < 2) {
+ throw new IllegalArgumentException(
+ "SAME predicate requires at least 2 arguments, got: " +
operands.size());
+ }
+ }
+
+ @Override
+ public SqlOperator getOperator() {
+ return SqlSameOperator.INSTANCE;
+ }
+
+ @Override
+ public List<SqlNode> getOperandList() {
+ return operands;
+ }
+
+ @Override
+ public void validate(SqlValidator validator, SqlValidatorScope scope) {
+ // Validation will be handled by GQLSameValidator
+ // This just validates the syntax is correct
+ for (SqlNode operand : operands) {
+ operand.validate(validator, scope);
+ }
+ }
+
+ @Override
+ public void setOperand(int i, SqlNode operand) {
+ if (i < 0 || i >= operands.size()) {
+ throw new IllegalArgumentException("Invalid operand index: " + i);
+ }
+ operands.set(i, operand);
+ }
+
+ @Override
+ public void unparse(SqlWriter writer, int leftPrec, int rightPrec) {
+ writer.print("SAME");
+ final SqlWriter.Frame frame =
+ writer.startList(SqlWriter.FrameTypeEnum.FUN_CALL, "(", ")");
+
+ for (int i = 0; i < operands.size(); i++) {
+ if (i > 0) {
+ writer.sep(",");
+ }
+ operands.get(i).unparse(writer, 0, 0);
+ }
+
+ writer.endList(frame);
+ }
+
+ /**
+ * Returns the number of operands (element references) in this SAME call.
+ */
+ public int getOperandCount() {
+ return operands.size();
+ }
+
+ /**
+ * Returns the operand at the specified index.
+ */
+ public SqlNode getOperand(int index) {
+ return operands.get(index);
+ }
+}
diff --git
a/geaflow/geaflow-dsl/geaflow-dsl-parser/src/test/java/org/apache/geaflow/dsl/IsoGqlSyntaxTest.java
b/geaflow/geaflow-dsl/geaflow-dsl-parser/src/test/java/org/apache/geaflow/dsl/IsoGqlSyntaxTest.java
index adf537792..38916e051 100644
---
a/geaflow/geaflow-dsl/geaflow-dsl-parser/src/test/java/org/apache/geaflow/dsl/IsoGqlSyntaxTest.java
+++
b/geaflow/geaflow-dsl/geaflow-dsl-parser/src/test/java/org/apache/geaflow/dsl/IsoGqlSyntaxTest.java
@@ -31,4 +31,11 @@ public class IsoGqlSyntaxTest extends BaseDslTest {
String unParseStmts =
parseStmtsAndUnParse(parseStmtsAndUnParse(unParseSql));
Assert.assertEquals(unParseStmts, unParseSql);
}
+
+ @Test
+ public void testIsoGQLSamePredicate() throws Exception {
+ String unParseSql = parseSqlAndUnParse("IsoGQLSame.sql");
+ String unParseStmts =
parseStmtsAndUnParse(parseStmtsAndUnParse(unParseSql));
+ Assert.assertEquals(unParseStmts, unParseSql);
+ }
}
diff --git
a/geaflow/geaflow-dsl/geaflow-dsl-parser/src/test/java/org/apache/geaflow/dsl/IsoGqlSyntaxTest.java
b/geaflow/geaflow-dsl/geaflow-dsl-parser/src/test/resources/IsoGQLSame.sql
similarity index 63%
copy from
geaflow/geaflow-dsl/geaflow-dsl-parser/src/test/java/org/apache/geaflow/dsl/IsoGqlSyntaxTest.java
copy to geaflow/geaflow-dsl/geaflow-dsl-parser/src/test/resources/IsoGQLSame.sql
index adf537792..b50e488fe 100644
---
a/geaflow/geaflow-dsl/geaflow-dsl-parser/src/test/java/org/apache/geaflow/dsl/IsoGqlSyntaxTest.java
+++ b/geaflow/geaflow-dsl/geaflow-dsl-parser/src/test/resources/IsoGQLSame.sql
@@ -17,18 +17,7 @@
* under the License.
*/
-package org.apache.geaflow.dsl;
-
-import org.testng.Assert;
-import org.testng.annotations.Test;
-
-@Test(groups = "SyntaxTest")
-public class IsoGqlSyntaxTest extends BaseDslTest {
-
- @Test
- public void testIsoGQLMatch() throws Exception {
- String unParseSql = parseSqlAndUnParse("IsoGQLMatch.sql");
- String unParseStmts =
parseStmtsAndUnParse(parseStmtsAndUnParse(unParseSql));
- Assert.assertEquals(unParseStmts, unParseSql);
- }
-}
+MATCH (a:person)-[:know]->(b:person), (b)-[:know]->(c:person) WHERE SAME(a, c)
RETURN a.name, b.name;
+MATCH (a:person)-[:know]->(b:person), (c:person)-[:know]->(d:person) WHERE
SAME(a, c) RETURN a.id, b.id, c.id, d.id;
+MATCH (a:person {id: 1})-[e1:know]->(b:person),
(c:person)-[e2:know]->(d:person) WHERE SAME(a, b, c) RETURN a.id, b.id;
+MATCH (a:person)-[e1:know]->(b:person)-[e2:know]->(c:person) WHERE SAME(a, c)
RETURN a.name, b.name, c.name;
diff --git
a/geaflow/geaflow-dsl/geaflow-dsl-plan/src/main/java/org/apache/geaflow/dsl/schema/function/BuildInSqlOperatorTable.java
b/geaflow/geaflow-dsl/geaflow-dsl-plan/src/main/java/org/apache/geaflow/dsl/schema/function/BuildInSqlOperatorTable.java
index 52bcc6834..6b889e7c8 100644
---
a/geaflow/geaflow-dsl/geaflow-dsl-plan/src/main/java/org/apache/geaflow/dsl/schema/function/BuildInSqlOperatorTable.java
+++
b/geaflow/geaflow-dsl/geaflow-dsl-plan/src/main/java/org/apache/geaflow/dsl/schema/function/BuildInSqlOperatorTable.java
@@ -24,6 +24,7 @@ import org.apache.calcite.sql.SqlKind;
import org.apache.calcite.sql.SqlOperator;
import org.apache.calcite.sql.fun.SqlStdOperatorTable;
import org.apache.calcite.sql.util.ReflectiveSqlOperatorTable;
+import org.apache.geaflow.dsl.operator.SqlSameOperator;
public class BuildInSqlOperatorTable extends ReflectiveSqlOperatorTable {
@@ -173,7 +174,9 @@ public class BuildInSqlOperatorTable extends
ReflectiveSqlOperatorTable {
SqlStdOperatorTable.CUME_DIST,
SqlStdOperatorTable.ROW_NUMBER,
SqlStdOperatorTable.LAG,
- SqlStdOperatorTable.LEAD
+ SqlStdOperatorTable.LEAD,
+ // ISO-GQL SAME predicate
+ SqlSameOperator.INSTANCE
};
public BuildInSqlOperatorTable() {
diff --git
a/geaflow/geaflow-dsl/geaflow-dsl-plan/src/main/java/org/apache/geaflow/dsl/schema/function/GeaFlowBuiltinFunctions.java
b/geaflow/geaflow-dsl/geaflow-dsl-plan/src/main/java/org/apache/geaflow/dsl/schema/function/GeaFlowBuiltinFunctions.java
index ef89e02f7..3c5e669a7 100644
---
a/geaflow/geaflow-dsl/geaflow-dsl-plan/src/main/java/org/apache/geaflow/dsl/schema/function/GeaFlowBuiltinFunctions.java
+++
b/geaflow/geaflow-dsl/geaflow-dsl-plan/src/main/java/org/apache/geaflow/dsl/schema/function/GeaFlowBuiltinFunctions.java
@@ -23,9 +23,12 @@ import java.math.BigDecimal;
import java.math.RoundingMode;
import java.sql.Timestamp;
import java.util.Calendar;
+import java.util.Objects;
import java.util.Random;
import org.apache.commons.lang3.time.DateUtils;
import org.apache.geaflow.common.binary.BinaryString;
+import org.apache.geaflow.dsl.common.data.RowEdge;
+import org.apache.geaflow.dsl.common.data.RowVertex;
public final class GeaFlowBuiltinFunctions {
@@ -1428,6 +1431,91 @@ public final class GeaFlowBuiltinFunctions {
return a.equals(b);
}
+ /**
+ * ISO-GQL SAME predicate function for vertices.
+ * Checks if two vertices refer to the same element by comparing their IDs.
+ *
+ * @param a first vertex
+ * @param b second vertex
+ * @return true if vertices have the same ID, false otherwise, null if
either is null
+ */
+ public static Boolean same(RowVertex a, RowVertex b) {
+ if (a == null || b == null) {
+ return null;
+ }
+ return Objects.equals(a.getId(), b.getId());
+ }
+
+ /**
+ * ISO-GQL SAME predicate function for edges.
+ * Checks if two edges refer to the same element by comparing their source
and target IDs.
+ *
+ * @param a first edge
+ * @param b second edge
+ * @return true if edges have the same source and target IDs, false
otherwise, null if either is null
+ */
+ public static Boolean same(RowEdge a, RowEdge b) {
+ if (a == null || b == null) {
+ return null;
+ }
+ return Objects.equals(a.getSrcId(), b.getSrcId())
+ && Objects.equals(a.getTargetId(), b.getTargetId());
+ }
+
+ /**
+ * ISO-GQL SAME predicate function (fallback for mixed or unknown types).
+ * Checks if two graph elements refer to the same element by comparing
their identities.
+ * For vertices, compares vertex IDs.
+ * For edges, compares both source and target IDs.
+ *
+ * @param a first element (vertex or edge)
+ * @param b second element (vertex or edge)
+ * @return true if elements have the same identity, false otherwise, null
if either is null
+ */
+ public static Boolean same(Object a, Object b) {
+ if (a == null || b == null) {
+ return null;
+ }
+ // Delegate to type-specific overloads when possible
+ if (a instanceof RowVertex && b instanceof RowVertex) {
+ return same((RowVertex) a, (RowVertex) b);
+ }
+ if (a instanceof RowEdge && b instanceof RowEdge) {
+ return same((RowEdge) a, (RowEdge) b);
+ }
+ // Different types cannot be the same
+ return false;
+ }
+
+ /**
+ * ISO-GQL SAME predicate function for multiple elements.
+ * Checks if all elements refer to the same graph element.
+ * Returns true only if all elements are identical (same type and same
identity).
+ *
+ * @param elements array of elements to compare (minimum 2 required)
+ * @return true if all elements have the same identity, false otherwise,
null if any is null
+ */
+ public static Boolean same(Object... elements) {
+ if (elements == null || elements.length < 2) {
+ return null;
+ }
+ // Check for any null elements
+ for (Object e : elements) {
+ if (e == null) {
+ return null;
+ }
+ }
+ // Compare all elements with the first one
+ Object first = elements[0];
+ for (int i = 1; i < elements.length; i++) {
+ Boolean result = same(first, elements[i]);
+ if (result == null || !result) {
+ return result;
+ }
+ }
+ return true;
+ }
+
public static Boolean unequal(Long a, Long b) {
if (a == null || b == null) {
return null;
diff --git
a/geaflow/geaflow-dsl/geaflow-dsl-plan/src/test/java/org/apache/geaflow/dsl/schema/function/SameTest.java
b/geaflow/geaflow-dsl/geaflow-dsl-plan/src/test/java/org/apache/geaflow/dsl/schema/function/SameTest.java
new file mode 100644
index 000000000..52065e160
--- /dev/null
+++
b/geaflow/geaflow-dsl/geaflow-dsl-plan/src/test/java/org/apache/geaflow/dsl/schema/function/SameTest.java
@@ -0,0 +1,255 @@
+/*
+ * 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.
+ */
+
+package org.apache.geaflow.dsl.schema.function;
+
+import org.apache.geaflow.dsl.common.data.impl.ObjectRow;
+import org.apache.geaflow.dsl.common.data.impl.types.ObjectEdge;
+import org.apache.geaflow.dsl.common.data.impl.types.ObjectVertex;
+import org.testng.Assert;
+import org.testng.annotations.Test;
+
+/**
+ * Unit tests for the ISO-GQL SAME predicate function.
+ */
+public class SameTest {
+
+ @Test
+ public void testSameWithIdenticalVertices() {
+ // Create two vertices with the same ID
+ ObjectVertex v1 = new ObjectVertex(1, null, ObjectRow.create("Alice",
25));
+ ObjectVertex v2 = new ObjectVertex(1, null, ObjectRow.create("Bob",
30));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(v1, v2);
+ Assert.assertTrue(result, "Vertices with same ID should return true");
+ }
+
+ @Test
+ public void testSameWithDifferentVertices() {
+ // Create two vertices with different IDs
+ ObjectVertex v1 = new ObjectVertex(1, null, ObjectRow.create("Alice",
25));
+ ObjectVertex v2 = new ObjectVertex(2, null, ObjectRow.create("Bob",
30));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(v1, v2);
+ Assert.assertFalse(result, "Vertices with different IDs should return
false");
+ }
+
+ @Test
+ public void testSameWithIdenticalEdges() {
+ // Create two edges with the same source and target IDs
+ ObjectEdge e1 = new ObjectEdge(1, 2, ObjectRow.create("knows"));
+ ObjectEdge e2 = new ObjectEdge(1, 2, ObjectRow.create("likes"));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(e1, e2);
+ Assert.assertTrue(result, "Edges with same source and target IDs
should return true");
+ }
+
+ @Test
+ public void testSameWithDifferentEdgesSameSource() {
+ // Create two edges with the same source but different target IDs
+ ObjectEdge e1 = new ObjectEdge(1, 2, ObjectRow.create("knows"));
+ ObjectEdge e2 = new ObjectEdge(1, 3, ObjectRow.create("knows"));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(e1, e2);
+ Assert.assertFalse(result, "Edges with different target IDs should
return false");
+ }
+
+ @Test
+ public void testSameWithDifferentEdgesSameTarget() {
+ // Create two edges with different source but same target IDs
+ ObjectEdge e1 = new ObjectEdge(1, 2, ObjectRow.create("knows"));
+ ObjectEdge e2 = new ObjectEdge(3, 2, ObjectRow.create("knows"));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(e1, e2);
+ Assert.assertFalse(result, "Edges with different source IDs should
return false");
+ }
+
+ @Test
+ public void testSameWithDifferentEdges() {
+ // Create two edges with completely different IDs
+ ObjectEdge e1 = new ObjectEdge(1, 2, ObjectRow.create("knows"));
+ ObjectEdge e2 = new ObjectEdge(3, 4, ObjectRow.create("knows"));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(e1, e2);
+ Assert.assertFalse(result, "Edges with different IDs should return
false");
+ }
+
+ @Test
+ public void testSameWithMixedTypes() {
+ // Test vertex and edge - should return false
+ ObjectVertex v = new ObjectVertex(1, null, ObjectRow.create("Alice",
25));
+ ObjectEdge e = new ObjectEdge(1, 2, ObjectRow.create("knows"));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(v, e);
+ Assert.assertFalse(result, "Vertex and edge should return false");
+ }
+
+ @Test
+ public void testSameWithNullFirst() {
+ // Test with first argument null
+ ObjectVertex v = new ObjectVertex(1, null, ObjectRow.create("Alice",
25));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(null, v);
+ Assert.assertNull(result, "Null first argument should return null");
+ }
+
+ @Test
+ public void testSameWithNullSecond() {
+ // Test with second argument null
+ ObjectVertex v = new ObjectVertex(1, null, ObjectRow.create("Alice",
25));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(v, null);
+ Assert.assertNull(result, "Null second argument should return null");
+ }
+
+ @Test
+ public void testSameWithBothNull() {
+ // Test with both arguments null - use explicit cast to Object to
resolve ambiguity
+ Boolean result = GeaFlowBuiltinFunctions.same((Object) null, (Object)
null);
+ Assert.assertNull(result, "Both null arguments should return null");
+ }
+
+ @Test
+ public void testSameWithStringIds() {
+ // Test with string IDs instead of integer IDs
+ ObjectVertex v1 = new ObjectVertex("user123", null,
ObjectRow.create("Alice", 25));
+ ObjectVertex v2 = new ObjectVertex("user123", null,
ObjectRow.create("Bob", 30));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(v1, v2);
+ Assert.assertTrue(result, "Vertices with same string ID should return
true");
+ }
+
+ @Test
+ public void testSameWithDifferentStringIds() {
+ // Test with different string IDs
+ ObjectVertex v1 = new ObjectVertex("user123", null,
ObjectRow.create("Alice", 25));
+ ObjectVertex v2 = new ObjectVertex("user456", null,
ObjectRow.create("Bob", 30));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(v1, v2);
+ Assert.assertFalse(result, "Vertices with different string IDs should
return false");
+ }
+
+ @Test
+ public void testSameWithInvalidTypes() {
+ // Test with objects that are not RowVertex or RowEdge
+ String s1 = "test";
+ String s2 = "test";
+
+ Boolean result = GeaFlowBuiltinFunctions.same(s1, s2);
+ Assert.assertFalse(result, "Non-graph elements should return false");
+ }
+
+ // Tests for type-specific overloads (RowVertex, RowEdge)
+
+ @Test
+ public void testSameVertexOverloadWithIdenticalIds() {
+ // Test the type-specific RowVertex overload
+ ObjectVertex v1 = new ObjectVertex(100, null,
ObjectRow.create("Alice", 25));
+ ObjectVertex v2 = new ObjectVertex(100, null, ObjectRow.create("Bob",
30));
+
+ // Explicitly call with RowVertex types
+ Boolean result =
GeaFlowBuiltinFunctions.same((org.apache.geaflow.dsl.common.data.RowVertex) v1,
+ (org.apache.geaflow.dsl.common.data.RowVertex) v2);
+ Assert.assertTrue(result, "Type-specific vertex overload should work");
+ }
+
+ @Test
+ public void testSameEdgeOverloadWithIdenticalIds() {
+ // Test the type-specific RowEdge overload
+ ObjectEdge e1 = new ObjectEdge(10, 20, ObjectRow.create("knows"));
+ ObjectEdge e2 = new ObjectEdge(10, 20, ObjectRow.create("likes"));
+
+ // Explicitly call with RowEdge types
+ Boolean result =
GeaFlowBuiltinFunctions.same((org.apache.geaflow.dsl.common.data.RowEdge) e1,
+ (org.apache.geaflow.dsl.common.data.RowEdge) e2);
+ Assert.assertTrue(result, "Type-specific edge overload should work");
+ }
+
+ // Tests for multi-argument same() varargs method
+
+ @Test
+ public void testSameWithThreeIdenticalVertices() {
+ // Test varargs with 3 identical vertices
+ ObjectVertex v1 = new ObjectVertex(1, null, ObjectRow.create("Alice",
25));
+ ObjectVertex v2 = new ObjectVertex(1, null, ObjectRow.create("Bob",
30));
+ ObjectVertex v3 = new ObjectVertex(1, null,
ObjectRow.create("Charlie", 35));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(v1, v2, v3);
+ Assert.assertTrue(result, "Three vertices with same ID should return
true");
+ }
+
+ @Test
+ public void testSameWithThreeVerticesOneDifferent() {
+ // Test varargs with one different vertex
+ ObjectVertex v1 = new ObjectVertex(1, null, ObjectRow.create("Alice",
25));
+ ObjectVertex v2 = new ObjectVertex(1, null, ObjectRow.create("Bob",
30));
+ ObjectVertex v3 = new ObjectVertex(2, null,
ObjectRow.create("Charlie", 35));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(v1, v2, v3);
+ Assert.assertFalse(result, "Three vertices with one different ID
should return false");
+ }
+
+ @Test
+ public void testSameWithFourIdenticalEdges() {
+ // Test varargs with 4 identical edges
+ ObjectEdge e1 = new ObjectEdge(1, 2, ObjectRow.create("knows"));
+ ObjectEdge e2 = new ObjectEdge(1, 2, ObjectRow.create("likes"));
+ ObjectEdge e3 = new ObjectEdge(1, 2, ObjectRow.create("follows"));
+ ObjectEdge e4 = new ObjectEdge(1, 2, ObjectRow.create("trusts"));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(e1, e2, e3, e4);
+ Assert.assertTrue(result, "Four edges with same source and target IDs
should return true");
+ }
+
+ @Test
+ public void testSameWithMultipleNullInMiddle() {
+ // Test varargs with null in the middle
+ ObjectVertex v1 = new ObjectVertex(1, null, ObjectRow.create("Alice",
25));
+ ObjectVertex v3 = new ObjectVertex(1, null,
ObjectRow.create("Charlie", 35));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(v1, null, v3);
+ Assert.assertNull(result, "Varargs with null element should return
null");
+ }
+
+ @Test
+ public void testSameWithEmptyVarargs() {
+ // Test varargs with no arguments (should return null)
+ Boolean result = GeaFlowBuiltinFunctions.same(new Object[0]);
+ Assert.assertNull(result, "Empty varargs should return null");
+ }
+
+ @Test
+ public void testSameWithSingleVararg() {
+ // Test varargs with single argument (should return null - need at
least 2)
+ ObjectVertex v1 = new ObjectVertex(1, null, ObjectRow.create("Alice",
25));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(new Object[]{v1});
+ Assert.assertNull(result, "Single vararg should return null");
+ }
+
+ @Test
+ public void testSameWithMixedTypesInVarargs() {
+ // Test varargs with mixed vertex and edge types
+ ObjectVertex v = new ObjectVertex(1, null, ObjectRow.create("Alice",
25));
+ ObjectEdge e = new ObjectEdge(1, 2, ObjectRow.create("knows"));
+
+ Boolean result = GeaFlowBuiltinFunctions.same(v, e);
+ Assert.assertFalse(result, "Mixed vertex and edge in varargs should
return false");
+ }
+}
diff --git
a/geaflow/geaflow-dsl/geaflow-dsl-runtime/src/main/java/org/apache/geaflow/dsl/runtime/expression/BuildInExpression.java
b/geaflow/geaflow-dsl/geaflow-dsl-runtime/src/main/java/org/apache/geaflow/dsl/runtime/expression/BuildInExpression.java
index 80698bccf..4093366e6 100644
---
a/geaflow/geaflow-dsl/geaflow-dsl-runtime/src/main/java/org/apache/geaflow/dsl/runtime/expression/BuildInExpression.java
+++
b/geaflow/geaflow-dsl/geaflow-dsl-runtime/src/main/java/org/apache/geaflow/dsl/runtime/expression/BuildInExpression.java
@@ -89,6 +89,8 @@ public class BuildInExpression extends
AbstractReflectCallExpression {
public static final String CURRENT_TIMESTAMP = "currentTimestamp";
+ public static final String SAME = "same";
+
public BuildInExpression(List<Expression> inputs, IType<?> outputType,
Class<?> implementClass, String methodName) {
super(inputs, outputType, implementClass, methodName);
diff --git
a/geaflow/geaflow-dsl/geaflow-dsl-runtime/src/main/java/org/apache/geaflow/dsl/runtime/expression/ExpressionTranslator.java
b/geaflow/geaflow-dsl/geaflow-dsl-runtime/src/main/java/org/apache/geaflow/dsl/runtime/expression/ExpressionTranslator.java
index b91b94144..b1a70d9fd 100644
---
a/geaflow/geaflow-dsl/geaflow-dsl-runtime/src/main/java/org/apache/geaflow/dsl/runtime/expression/ExpressionTranslator.java
+++
b/geaflow/geaflow-dsl/geaflow-dsl-runtime/src/main/java/org/apache/geaflow/dsl/runtime/expression/ExpressionTranslator.java
@@ -399,6 +399,9 @@ public class ExpressionTranslator implements
RexVisitor<Expression> {
case "CURRENT_TIMESTAMP":
functionName = BuildInExpression.CURRENT_TIMESTAMP;
break;
+ case "SAME":
+ functionName = BuildInExpression.SAME;
+ break;
default:
}
if (functionName != null) {
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