[fix](DECIMAL) error DECIMAL cat to BOOLEAN

be/src/vec/data_types/data_type_decimal.h

@@ -474,16 +474,21 @@ void convert_from_decimals(RealTo* dst, const RealFrom* src, UInt32 scale_from,
     // from decimal to integer
     MaxFieldType multiplier = DataTypeDecimal<MaxFieldType>::get_scale_multiplier(scale_from);
     for (size_t i = 0; i < size; i++) {
-        auto tmp = static_cast<MaxFieldType>(src[i]).value / multiplier.value;
-        if constexpr (narrow_integral) {
-            if (tmp < min_result.value || tmp > max_result.value) {
-                throw Exception(ErrorCode::ARITHMETIC_OVERFLOW_ERRROR,
-                                "Arithmetic overflow, convert failed from {}, "
-                                "expected data is [{}, {}]",
-                                tmp, min_result.value, max_result.value);
+        // uint8_t now use as boolean in doris
+        if constexpr (std::is_same_v<RealTo, UInt8>) {
+            dst[i] = static_cast<MaxFieldType>(src[i]).value != 0;
+        } else {
+            auto tmp = static_cast<MaxFieldType>(src[i]).value / multiplier.value;
+            if constexpr (narrow_integral) {
+                if (tmp < min_result.value || tmp > max_result.value) {
+                    throw Exception(ErrorCode::ARITHMETIC_OVERFLOW_ERRROR,
+                                    "Arithmetic overflow, convert failed from {}, "
+                                    "expected data is [{}, {}]",
+                                    tmp, min_result.value, max_result.value);
+                }
             }
+            dst[i] = tmp;
         }
-        dst[i] = tmp;
     }
 }
 

regression-test/data/correctness/test_cast_decimalv3_as_bool.out

@@ -0,0 +1,14 @@
+-- This file is automatically generated. You should know what you did if you want to edit this
+-- !select1 --
+0.000	13131.213132100	0E-16
+0.000	2131231.231000000	2.3323000E-9
+3.141	0E-9	123123.2131231231322130
+
+-- !select2 --
+false	true	false
+false	true	true
+true	false	true
+
+-- !select3 --
+true	1	true	false
+

regression-test/suites/correctness/test_cast_decimalv3_as_bool.groovy

@@ -0,0 +1,52 @@
+// 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_cast_decimalv3_as_bool") {
+     sql """ DROP TABLE IF EXISTS cast_decimalv3_as_bool """
+     sql """
+        CREATE TABLE IF NOT EXISTS cast_decimalv3_as_bool (
+            `id` int(11) ,
+            `k1` decimalv3(9,3) ,
+            `k2` decimalv3(18,9) ,
+            `k3` decimalv3(38,16) ,
+        )
+        UNIQUE KEY(`id`)
+        DISTRIBUTED BY HASH(`id`) BUCKETS 10
+        PROPERTIES (
+        "enable_unique_key_merge_on_write" = "true",
+        "replication_num" = "1"
+        );
+    """
+    sql """
+        set enable_nereids_planner=true,enable_fold_constant_by_be = false
+    """
+    sql """
+        INSERT INTO cast_decimalv3_as_bool VALUES
+        (1,0.00001,13131.2131321,0.000000000000000000),
+        (2,0.00000,2131231.231,0.0000000023323),
+        (3,3.141414,0.0000000000,123123.213123123132213);
+    """
+    qt_select1 """
+        select k1,k2,k3 from cast_decimalv3_as_bool order by id
+    """
+    qt_select2 """
+        select cast(k1 as boolean), cast(k2 as boolean) , cast(k3 as boolean) from cast_decimalv3_as_bool order by id
+    """ 
+    qt_select3"""
+        select cast(3.00001 as boolean),  cast(cast(3.00001 as  boolean) as int),cast(0.001 as boolean),cast(0.000 as boolean);
+    """
+}

regression-test/suites/query_p0/sql_functions/case_function/test_case_function_null.groovy

@@ -188,7 +188,7 @@ suite("test_case_function_null", "query,p0,arrow_flight_sql") {
 
     qt_sql_case1 """
         SELECT SUM(
-            CASE (((NULL BETWEEN NULL AND NULL)) and (CAST(0.4716 AS BOOLEAN)))
+            CASE (((NULL BETWEEN NULL AND NULL)) and (CAST(0.000 AS BOOLEAN)))
             WHEN ((CAST('-1530390546' AS VARCHAR)) LIKE ('-1678299490'))
             THEN (- (+ case_null2.c0))
             WHEN CASE (NULL IN (NULL))
@@ -199,7 +199,7 @@ suite("test_case_function_null", "query,p0,arrow_flight_sql") {
     """
 
     qt_sql_case2 """
-        SELECT SUM(CASE (((NULL BETWEEN NULL AND NULL)) and (CAST(0.4716 AS BOOLEAN)))
+        SELECT SUM(CASE (((NULL BETWEEN NULL AND NULL)) and (CAST(0.000 AS BOOLEAN)))
             WHEN ((CAST('-1530390546' AS VARCHAR)) LIKE ('-1678299490'))
             THEN (- (+ case_null2.c0))
             END)
@@ -211,7 +211,7 @@ suite("test_case_function_null", "query,p0,arrow_flight_sql") {
 
     qt_sql_case1 """
         SELECT SUM(
-            CASE (((NULL BETWEEN NULL AND NULL)) and (CAST(0.4716 AS BOOLEAN)))
+            CASE (((NULL BETWEEN NULL AND NULL)) and (CAST(0.000 AS BOOLEAN)))
             WHEN ((CAST('-1530390546' AS VARCHAR)) LIKE ('-1678299490'))
             THEN (- (+ case_null2.c0))
             WHEN CASE (NULL IN (NULL))
@@ -222,7 +222,7 @@ suite("test_case_function_null", "query,p0,arrow_flight_sql") {
     """
 
     qt_sql_case2 """
-        SELECT SUM(CASE (((NULL BETWEEN NULL AND NULL)) and (CAST(0.4716 AS BOOLEAN)))
+        SELECT SUM(CASE (((NULL BETWEEN NULL AND NULL)) and (CAST(0.000 AS BOOLEAN)))
             WHEN ((CAST('-1530390546' AS VARCHAR)) LIKE ('-1678299490'))
             THEN (- (+ case_null2.c0))
             END)