[Feature](function)Support Function Time

be/src/vec/functions/function_date_or_datetime_computation.cpp

@@ -136,6 +136,7 @@ void register_function_date_time_computation(SimpleFunctionFactory& factory) {
     factory.register_function<FunctionMicroSecToDateTime>();
     factory.register_function<FunctionMilliSecToDateTime>();
     factory.register_function<FunctionSecToDateTime>();
+    factory.register_function<FunctionTime>();
 
     // alias
     factory.register_alias("days_add", "date_add");

be/src/vec/functions/function_date_or_datetime_computation.h

@@ -995,4 +995,32 @@ class CurrentDateFunctionBuilder : public FunctionBuilderImpl {
     }
 };
 
+class FunctionTime : public IFunction {
+public:
+    static constexpr auto name = "time";
+    static FunctionPtr create() { return std::make_shared<FunctionTime>(); }
+    String get_name() const override { return name; }
+    size_t get_number_of_arguments() const override { return 1; }
+
+    DataTypePtr get_return_type_impl(const DataTypes& arguments) const override {
+        return std::make_shared<DataTypeTimeV2>();
+    }
+
+    Status execute_impl(FunctionContext* context, Block& block, const ColumnNumbers& arguments,
+                        uint32_t result, size_t input_rows_count) const override {
+        DCHECK_EQ(arguments.size(), 1);
+        ColumnPtr col = block.get_by_position(arguments[0]).column;
+        const auto* arg = assert_cast<const ColumnUInt64*>(col.get());
+        auto res = ColumnFloat64::create(input_rows_count);
+        auto& res_data = res->get_data();
+        for (int i = 0; i < arg->size(); i++) {
+            auto v = arg->get_element(i);
+            res_data[i] = TimeValue::make_time((v & 0x1f00000000) >> 32, (v & 0xfc000000) >> 26,
+                                               (v & 0x3f00000) >> 20);
+        }
+        block.replace_by_position(result, std::move(res));
+        return Status::OK();
+    }
+};
+
 } // namespace doris::vectorized

fe/fe-core/src/main/java/org/apache/doris/catalog/BuiltinScalarFunctions.java

@@ -425,6 +425,7 @@
 import org.apache.doris.nereids.trees.expressions.functions.scalar.SubstringIndex;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Tan;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Tanh;
+import org.apache.doris.nereids.trees.expressions.functions.scalar.Time;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.TimeDiff;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.TimeToSec;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Timestamp;
@@ -917,6 +918,7 @@ public class BuiltinScalarFunctions implements FunctionHelper {
             scalar(SubstringIndex.class, "substring_index"),
             scalar(Tan.class, "tan"),
             scalar(Tanh.class, "tanh"),
+            scalar(Time.class, "time"),
             scalar(TimeDiff.class, "timediff"),
             scalar(TimeToSec.class, "time_to_sec"),
             scalar(Timestamp.class, "timestamp"),

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/Time.java

@@ -0,0 +1,68 @@
+// 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.doris.nereids.trees.expressions.functions.scalar;
+
+import org.apache.doris.catalog.FunctionSignature;
+import org.apache.doris.nereids.trees.expressions.Expression;
+import org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
+import org.apache.doris.nereids.trees.expressions.functions.PropagateNullableOnDateLikeV2Args;
+import org.apache.doris.nereids.trees.expressions.shape.BinaryExpression;
+import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
+import org.apache.doris.nereids.types.DateTimeV2Type;
+import org.apache.doris.nereids.types.TimeV2Type;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+
+import java.util.List;
+
+/**
+ * ScalarFunction 'time'. This class is generated by GenerateFunction.
+ */
+public class Time extends ScalarFunction
+        implements BinaryExpression, ExplicitlyCastableSignature, PropagateNullableOnDateLikeV2Args {
+
+    private static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
+            FunctionSignature.ret(TimeV2Type.INSTANCE).args(DateTimeV2Type.SYSTEM_DEFAULT));
+
+    /**
+     * constructor with 1 argument.
+     */
+    public Time(Expression arg) {
+        super("time", arg);
+    }
+
+    /**
+     * withChildren.
+     */
+    @Override
+    public Time withChildren(List<Expression> children) {
+        Preconditions.checkArgument(children.size() == 1);
+        return new Time(children.get(0));
+    }
+
+    @Override
+    public List<FunctionSignature> getSignatures() {
+        return SIGNATURES;
+    }
+
+    @Override
+    public <R, C> R accept(ExpressionVisitor<R, C> visitor, C context) {
+        return visitor.visitTime(this, context);
+    }
+}

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/visitor/ScalarFunctionVisitor.java

@@ -423,6 +423,7 @@
 import org.apache.doris.nereids.trees.expressions.functions.scalar.SubstringIndex;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Tan;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Tanh;
+import org.apache.doris.nereids.trees.expressions.functions.scalar.Time;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.TimeDiff;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.Timestamp;
 import org.apache.doris.nereids.trees.expressions.functions.scalar.ToBase64;
@@ -2065,6 +2066,10 @@ default R visitTanh(Tanh tanh, C context) {
         return visitScalarFunction(tanh, context);
     }
 
+    default R visitTime(Time time, C context) {
+        return visitScalarFunction(time, context);
+    }
+
     default R visitTimeDiff(TimeDiff timeDiff, C context) {
         return visitScalarFunction(timeDiff, context);
     }

regression-test/data/query_p0/sql_functions/datetime_functions/test_time.out

@@ -0,0 +1,18 @@
+-- This file is automatically generated. You should know what you did if you want to edit this
+-- !sql --
+12:12:12
+
+-- !sql --
+\N
+
+-- !sql --
+\N
+
+-- !sql --
+\N
+
+-- !sql_time --
+\N
+13:21:03
+13:22:03
+14:21:03

regression-test/suites/query_p0/sql_functions/datetime_functions/test_time.groovy

@@ -0,0 +1,46 @@
+// 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.
+
+suite("test_time") {
+    qt_sql """ select time('2025-1-1 12:12:12') """
+    qt_sql """ select time('2025-1-1 12:12:61') """
+    qt_sql """ select time('2025-1-1 12:61:12') """
+    qt_sql """ select time('2025-1-1 25:12:12') """
+    def tableName = "test_time_function"
+
+    sql """ DROP TABLE IF EXISTS ${tableName} """
+    sql """
+            CREATE TABLE IF NOT EXISTS ${tableName} (
+                test_time datetimev2 NULL COMMENT ""
+            ) ENGINE=OLAP
+            DUPLICATE KEY(test_time)
+            COMMENT "OLAP"
+            DISTRIBUTED BY HASH(test_time) BUCKETS 1
+            PROPERTIES (
+                "replication_allocation" = "tag.location.default: 1",
+                "in_memory" = "false",
+                "storage_format" = "V2"
+            )
+        """
+    sql """ insert into ${tableName} values 
+                ("2019-08-01 13:21:03"),
+                ("2019-08-01 13:22:03"),
+                ("2019-08-01 14:21:03"),
+                (null);
+    """
+    qt_sql_time "select time(test_time) from ${tableName}";
+}