morrySnow commented on code in PR #30823:
URL: https://github.com/apache/doris/pull/30823#discussion_r1477835821


##########
fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4:
##########
@@ -663,6 +663,13 @@ primaryExpression
                 (INTERVAL unitsAmount=valueExpression  unit=datetimeUnit
                 | unitsAmount=valueExpression)
             RIGHT_PAREN                                                        
                #dateCeil
+    | name =(ARRAY_RANGE | SEQUENCE)
+            LEFT_PAREN
+                start=valueExpression COMMA
+                end=valueExpression COMMA
+                (INTERVAL unitsAmount=valueExpression unit=datetimeUnit
+                | unitsAmount=valueExpression)
+            RIGHT_PAREN                                                        
                #array_range

Review Comment:
   ```suggestion
               RIGHT_PAREN                                                      
                  #arrayRange
   ```



##########
fe/fe-core/src/main/antlr4/org/apache/doris/nereids/DorisParser.g4:
##########
@@ -907,6 +914,7 @@ nonReserved
     | ALIAS
     | ANALYZED
     | ARRAY
+    | ARRAY_RANGE

Review Comment:
   SEQUENCE?



##########
docs/en/docs/sql-manual/sql-functions/array-functions/sequence.md:
##########
@@ -0,0 +1,107 @@
+---
+{
+    "title": "SEQUENCE",
+    "language": "en"
+}
+---
+
+<!-- 
+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.
+-->
+
+## sequence
+
+<version since="dev">
+
+sequence
+
+</version>
+
+### description
+alias of array_range function

Review Comment:
   if it is only a alias, i think we'd better use one doc for good 
maintainability



##########
gensrc/script/doris_builtins_functions.py:
##########
@@ -827,9 +827,11 @@
         [['array_repeat'], 'ARRAY_VARCHAR', ['VARCHAR', 'BIGINT'], 
'ALWAYS_NOT_NULLABLE'],
         [['array_repeat'], 'ARRAY_STRING', ['STRING', 'BIGINT'], 
'ALWAYS_NOT_NULLABLE'],
 
-        [['array_range'], 'ARRAY_INT', ['INT'], 'ALWAYS_NULLABLE'],
-        [['array_range'], 'ARRAY_INT', ['INT', 'INT'], 'ALWAYS_NULLABLE'],
-        [['array_range'], 'ARRAY_INT', ['INT', 'INT', 'INT'], 
'ALWAYS_NULLABLE'],
+        [['array_range', 'sequence'], 'ARRAY_INT', ['INT'], 'ALWAYS_NULLABLE'],
+        [['array_range', 'sequence'], 'ARRAY_INT', ['INT', 'INT'], 
'ALWAYS_NULLABLE'],
+        [['array_range', 'sequence'], 'ARRAY_INT', ['INT', 'INT', 'INT'], 
'ALWAYS_NULLABLE'],
+        [['array_range', 'sequence'], 'ARRAY_DATETIMEV2', ['DATETIMEV2', 
'DATETIMEV2'], 'ALWAYS_NULLABLE'],
+        [['array_range', 'sequence'], 'ARRAY_DATETIMEV2', ['DATETIMEV2', 
'DATETIMEV2', 'INT'], 'ALWAYS_NULLABLE'],

Review Comment:
   this will allow `sequnce('2020-02-02', '2020-02-04', 2)` but we should only 
allow `sequnce('2020-02-02', '2020-02-04', interval 2 day)` in legacy planner



##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/ArrayRangeDayUnit.java:
##########
@@ -0,0 +1,84 @@
+// 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.AlwaysNullable;
+import 
org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
+import org.apache.doris.nereids.trees.expressions.shape.BinaryExpression;
+import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
+import org.apache.doris.nereids.types.ArrayType;
+import org.apache.doris.nereids.types.DateTimeV2Type;
+import org.apache.doris.nereids.types.IntegerType;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+
+import java.util.List;
+
+/**
+ * ScalarFunction 'array_range_day_unit'.
+ */
+public class ArrayRangeDayUnit extends ScalarFunction
+        implements BinaryExpression, ExplicitlyCastableSignature, 
AlwaysNullable {
+    private static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
+            FunctionSignature.ret(ArrayType.of(DateTimeV2Type.SYSTEM_DEFAULT))
+                .args(DateTimeV2Type.SYSTEM_DEFAULT, 
DateTimeV2Type.SYSTEM_DEFAULT),

Review Comment:
   i think we do not need two arg signature at all



##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/scalar/ArrayRangeDayUnit.java:
##########
@@ -0,0 +1,84 @@
+// 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.AlwaysNullable;
+import 
org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
+import org.apache.doris.nereids.trees.expressions.shape.BinaryExpression;
+import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
+import org.apache.doris.nereids.types.ArrayType;
+import org.apache.doris.nereids.types.DateTimeV2Type;
+import org.apache.doris.nereids.types.IntegerType;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+
+import java.util.List;
+
+/**
+ * ScalarFunction 'array_range_day_unit'.
+ */
+public class ArrayRangeDayUnit extends ScalarFunction
+        implements BinaryExpression, ExplicitlyCastableSignature, 
AlwaysNullable {
+    private static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
+            FunctionSignature.ret(ArrayType.of(DateTimeV2Type.SYSTEM_DEFAULT))
+                .args(DateTimeV2Type.SYSTEM_DEFAULT, 
DateTimeV2Type.SYSTEM_DEFAULT),
+            FunctionSignature.ret(ArrayType.of(DateTimeV2Type.SYSTEM_DEFAULT))
+                .args(DateTimeV2Type.SYSTEM_DEFAULT, 
DateTimeV2Type.SYSTEM_DEFAULT, IntegerType.INSTANCE)
+    );
+
+    /**
+     * constructor with 2 arguments.
+     */
+    public ArrayRangeDayUnit(Expression arg0, Expression arg1) {
+        super("array_range_day_unit", arg0, arg1);
+    }
+
+    /**
+     * constructor with 3 arguments.
+     */
+    public ArrayRangeDayUnit(Expression arg0, Expression arg1, Expression 
arg2) {
+        super("array_range_day_unit", arg0, arg1, arg2);
+    }
+
+    /**
+     * withChildren.
+     */
+    @Override
+    public ArrayRangeDayUnit withChildren(List<Expression> children) {
+        Preconditions.checkArgument(children.size() == 2
+                || children.size() == 3);

Review Comment:
   add check msg to avoid npe when check failed



##########
regression-test/suites/query_p0/sql_functions/array_functions/test_array_functions.groovy:
##########
@@ -335,4 +335,84 @@ suite("test_array_functions") {
 
     qt_sql """ select array_position(kadcml, kdcmls1), kadcml, kdcmls1 from 
fn_test;"""
 
+   /*
+    test scope:
+    1.array_range function with datetimev2 type
+    2.sequence function(alias of array_range) with int and datetimev2 type
+   */
+    def tableName5 = "tbl_test_sequence"
+    sql """drop TABLE if EXISTS ${tableName5};"""
+    sql """
+            CREATE TABLE IF NOT EXISTS ${tableName5} (
+                `test_id` int(11) NULL COMMENT "",
+                `k1` int(11) NULL COMMENT "",
+                `k2` int(11) NULL COMMENT "",
+                `k3` int(11) NULL COMMENT "",
+                `k4` datetimev2(0) NULL COMMENT "",
+                `k5` datetimev2(3) NULL COMMENT "",
+                `k6` datetimev2(6) NULL COMMENT "",              
+                `step` int(11) NULL COMMENT ""              
+            ) ENGINE=OLAP
+            DUPLICATE KEY(`test_id`)
+            DISTRIBUTED BY HASH(`test_id`) BUCKETS 1
+            PROPERTIES (
+            "replication_allocation" = "tag.location.default: 1",
+            "storage_format" = "V2"
+            );
+        """
+    sql """ INSERT INTO ${tableName5} (test_id, k1, k2, k3) VALUES(1,-1,3,5); 
"""
+    sql """ INSERT INTO ${tableName5} (test_id, k1, k2, k3) VALUES(2,1,3,5); 
"""
+    sql """ INSERT INTO ${tableName5} (test_id, k1, k2, k3) VALUES(3,2,10,2); 
"""
+    sql """ INSERT INTO ${tableName5} (test_id, k1, k2, k3) 
VALUES(4,3,NULL,NULL); """
+    sql """ INSERT INTO ${tableName5} (test_id, k1, k2, k3) VALUES(5,4,6,1); 
"""
+    sql """ INSERT INTO ${tableName5} (test_id, k1, k2, k3) VALUES(6,5,10,1); 
"""
+    sql """ INSERT INTO ${tableName5} (test_id, k1, k2, k3) 
VALUES(7,6,NULL,1); """
+    sql """ INSERT INTO ${tableName5} (test_id, k1, k2, k3) 
VALUES(8,7,10,NULL); """
+    sql """ INSERT INTO ${tableName5} (test_id, k1, k2, k3) 
VALUES(9,NULL,10,2); """
+    sql """ INSERT INTO ${tableName5} (test_id, k1, k2, k3) VALUES(10,8,2,2); 
"""
+    sql """ INSERT INTO ${tableName5} (test_id, k1, k2, k3) VALUES(11,9,10,6); 
"""
+    sql """ INSERT INTO ${tableName5} (test_id, k4, k5) VALUES(12, '2022-05-15 
12:00:00', '2022-05-18 12:00:00.123'); """
+    sql """ INSERT INTO ${tableName5} (test_id, k4, k6) VALUES(13, '2022-05-15 
12:00:00', '2022-05-18 12:00:00.123456'); """
+    sql """ INSERT INTO ${tableName5} (test_id, k4, k5, step) VALUES(14, 
'2022-05-15 12:00:00', '2022-05-18 12:00:00.123', 1); """
+    sql """ INSERT INTO ${tableName5} (test_id, k5, k6, step) VALUES(15, 
'2022-04-22 12:00:00.123', '2022-05-08 12:00:00.123456', 1); """
+    sql """ INSERT INTO ${tableName5} (test_id, k5, k6, step) VALUES(16, 
'2022-01-15 12:00:00.123', '2022-05-18 12:00:00.123456', 2); """
+    sql """ INSERT INTO ${tableName5} (test_id, k5, k6, step) VALUES(17, 
'2015-05-15 12:00:00.123', '2022-05-18 12:00:00.123456', 3); """
+    sql """ INSERT INTO ${tableName5} (test_id, k5, k6, step) VALUES(18, 
'2022-05-18 12:00:00.123', '2022-05-18 23:10:00.123456', 4); """
+    sql """ INSERT INTO ${tableName5} (test_id, k5, k6, step) VALUES(19, 
'2022-05-18 12:00:00.123', '2022-05-18 12:16:00', 5); """
+    sql """ INSERT INTO ${tableName5} (test_id, k5, k6, step) VALUES(20, 
'2022-05-18 12:00:10', '2022-05-18 12:00:30', 6); """
+    sql """ INSERT INTO ${tableName5} (test_id, k5, k6, step) VALUES(21, 
'2022-05-18 12:00:10', '2022-05-21 12:00:30', 2); """
+    sql """ INSERT INTO ${tableName5} (test_id, k5, k6, step) VALUES(22, 
'2022-05-22 12:00:10', '2022-05-25 12:00:30', 2); """
+    sql """ INSERT INTO ${tableName5} (test_id, k5, k6, step) VALUES(23, 
'2022-05-23 12:00:10', '2022-05-26 12:00:30', 2); """
+    sql """ INSERT INTO ${tableName5} (test_id, k5, k6, step) VALUES(24, 
'2022-05-27 12:00:10', '2022-05-30 12:00:30', 2); """
+
+    qt_table_select "SELECT k1, sequence(k1) from ${tableName5} where test_id 
< 12 ORDER BY test_id; """
+    qt_table_select "SELECT k1, sequence(k1,k2) from ${tableName5} where 
test_id < 12 ORDER BY test_id; """
+    qt_table_select "SELECT k1, sequence(k1,k2,k3) from ${tableName5} where 
test_id < 12 ORDER BY test_id; """
+    qt_table_select "SELECT k4, k5, sequence(k4, k5) from ${tableName5} where 
test_id = 12; """
+    qt_table_select "SELECT k4, k6, sequence(k4, k6) from ${tableName5} where 
test_id = 13; """
+    qt_table_select "SELECT k4, k5, step, sequence(k4, k5, interval step day) 
from ${tableName5} where test_id = 14; """
+    qt_table_select "SELECT k5, k6, step, sequence(k5, k6, interval step week) 
from ${tableName5} where test_id = 15; """
+    qt_table_select "SELECT k5, k6, step, sequence(k5, k6, interval step 
month) from ${tableName5} where test_id = 16; """
+    qt_table_select "SELECT k5, k6, step, sequence(k5, k6, interval step year) 
from ${tableName5} where test_id = 17; """
+    qt_table_select "SELECT k5, k6, step, sequence(k5, k6, interval step hour) 
from ${tableName5} where test_id = 18; """
+    qt_table_select "SELECT k5, k6, step, sequence(k5, k6, interval step 
minute) from ${tableName5} where test_id = 19; """
+    qt_table_select "SELECT k5, k6, step, sequence(k5, k6, interval step 
second) from ${tableName5} where test_id = 20; """
+    qt_table_select "SELECT k5, k6, step, sequence(k5, k6, interval step day) 
from ${tableName5} where test_id between 21 and 24 order by test_id; """
+    qt_const_select "select array_range(cast('2022-05-15 12:00:00' as 
datetimev2(0)), cast('2022-05-17 12:00:00' as datetimev2(0))); """
+    qt_const_select "select array_range(cast('2022-05-15 12:00:00' as 
datetimev2(0)), cast('2022-05-17 12:00:00' as datetimev2(0)), interval 1 day); 
"""
+    qt_const_select "select sequence(10); """
+    qt_const_select "select sequence(3, 10); """
+    qt_const_select "select sequence(3, 10, 2); """
+    qt_const_select "select sequence(cast('2022-05-15 12:00:00' as 
datetimev2(0)), cast('2022-05-17 12:00:00' as datetimev2(0))); """
+    qt_const_select "select sequence(cast('2022-05-15 12:00:00' as 
datetimev2(0)), cast('2022-05-17 12:00:00' as datetimev2(0)), interval 1 day); 
"""
+    qt_const_select "select sequence(cast('2022-05-01 12:00:00' as 
datetimev2(0)), cast('2022-05-17 12:00:00' as datetimev2(0)), interval 2 week); 
"""
+    qt_const_select "select sequence(cast('2022-01-15 12:00:00' as 
datetimev2(0)), cast('2022-05-17 12:00:00' as datetimev2(0)), interval 3 
month); """
+    qt_const_select "select sequence(cast('2019-05-15 12:00:00' as 
datetimev2(0)), cast('2022-05-17 12:00:00' as datetimev2(0)), interval 2 year); 
"""
+    qt_const_select "select sequence(cast('2022-05-18 12:00:10' as 
datetimev2(0)), cast('2022-05-18 22:00:30' as datetimev2(0)), interval 4 hour); 
"""
+    qt_const_select "select sequence(cast('2022-05-18 12:00:10' as 
datetimev2(0)), cast('2022-05-18 12:16:30' as datetimev2(0)), interval 5 
minute); """
+    qt_const_select "select sequence(cast('2022-05-18 12:00:10' as 
datetimev2(0)), cast('2022-05-18 12:00:30' as datetimev2(0)), interval 6 
second); """
+    qt_const_select "select sequence(cast('2022-05-18 12:00:10' as 
datetimev2(0)), cast('2022-05-18 22:00:30' as datetimev2(0)), interval -4 
hour); """
+    qt_const_select "select sequence(cast('2022-35-38 12:00:10' as 
datetimev2(0)), cast('2022-05-18 22:00:30' as datetimev2(0)), interval 4 hour); 
"""
+    qt_const_select "select sequence(cast('2022-05-15 12:00:00' as 
datetimev2(0)), cast('2022-35-37 12:00:00' as datetimev2(0))); """

Review Comment:
   maybe we need add some nagtive case, such as `sequence(1, 10, interval 10 
day)`, `sequence(cast('2022-35-38 12:00:10' as datetimev2(0)), cast('2022-05-18 
22:00:30' as datetimev2(0)), 4)` to ensure the function could work well



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