[BugFix] Deletion task failed when using datetime as a deletion predicate

be/src/storage/utils.cpp

@@ -323,7 +323,7 @@ bool valid_decimal(const string& value_str, uint32_t precision, uint32_t frac) {
 bool valid_datetime(const string& value_str) {
     const char* datetime_pattern =
             "((?:\\d){4})-((?:\\d){2})-((?:\\d){2})[ ]*"
-            "(((?:\\d){2}):((?:\\d){2}):((?:\\d){2}))?";
+            "(((?:\\d){2}):((?:\\d){2}):((?:\\d){2})(\\.(\\d{1,6}))?)?";
     boost::regex e(datetime_pattern);
     boost::smatch what;
 

be/test/storage/utils_test.cpp

@@ -57,4 +57,13 @@ TEST_F(TestUtils, test_is_tracker_hit_hard_limit) {
     ASSERT_TRUE(!is_tracker_hit_hard_limit(tracker.get(), 4));
 }
 
+TEST_F(TestUtils, test_valid_datetime) {
+    ASSERT_TRUE(valid_datetime("2020-01-01 00:00:00"));
+    ASSERT_TRUE(valid_datetime("2020-01-01 00:00:00.0"));
+    ASSERT_TRUE(valid_datetime("2020-01-01 00:00:00.01"));
+    ASSERT_TRUE(valid_datetime("2020-01-01 00:00:00.012345"));
+    ASSERT_TRUE(valid_datetime("2020-01-01 00:00:00.1230"));
+    ASSERT_FALSE(valid_datetime("2020-01-01 00:00:00.0123456"));
+}
+
 } // namespace starrocks

test/sql/test_datetime/R/test_datetime

@@ -39,4 +39,44 @@ select * from test_datetime order by c1;
 11	2020-01-01 00:00:00.123400
 12	2020-01-01 00:00:00.123450
 13	2020-01-01 00:00:00.123450
+-- !result
+delete from test_datetime where c2 = '2020-01-01 00:00:00';
+-- result:
+-- !result
+delete from test_datetime where c2 = '2020-01-01 00:00:00.0';
+-- result:
+-- !result
+delete from test_datetime where c2 = '2020-01-01 00:00:00.012';
+-- result:
+-- !result
+select * from test_datetime order by c1;
+-- result:
+3	2020-01-01 00:00:00.010000
+5	2020-01-01 00:00:00.012300
+6	2020-01-01 00:00:00.012340
+7	2020-01-01 00:00:00.012345
+8	2020-01-01 00:00:00.100000
+9	2020-01-01 00:00:00.120000
+10	2020-01-01 00:00:00.123000
+11	2020-01-01 00:00:00.123400
+12	2020-01-01 00:00:00.123450
+13	2020-01-01 00:00:00.123450
+-- !result
+delete from test_datetime where c2 = '2020-01-01 00:00:00.1';
+-- result:
+-- !result
+delete from test_datetime where c2 = '2020-01-01 00:00:00.123';
+-- result:
+-- !result
+delete from test_datetime where c2 = '2020-01-01 00:00:00.123450';
+-- result:
+-- !result
+select * from test_datetime order by c1;
+-- result:
+3	2020-01-01 00:00:00.010000
+5	2020-01-01 00:00:00.012300
+6	2020-01-01 00:00:00.012340
+7	2020-01-01 00:00:00.012345
+9	2020-01-01 00:00:00.120000
+11	2020-01-01 00:00:00.123400
 -- !result

test/sql/test_datetime/T/test_datetime

@@ -22,4 +22,16 @@ insert into test_datetime values
 (12, '2020-01-01 00:00:00.12345'),
 (13, '2020-01-01 00:00:00.123450');
 
+select * from test_datetime order by c1;
+
+delete from test_datetime where c2 = '2020-01-01 00:00:00';
+delete from test_datetime where c2 = '2020-01-01 00:00:00.0';
+delete from test_datetime where c2 = '2020-01-01 00:00:00.012';
+
+select * from test_datetime order by c1;
+
+delete from test_datetime where c2 = '2020-01-01 00:00:00.1';
+delete from test_datetime where c2 = '2020-01-01 00:00:00.123';
+delete from test_datetime where c2 = '2020-01-01 00:00:00.123450';
+
 select * from test_datetime order by c1;