support uuid type for "into outfile" clause (#5741)

support uuid type for "into outfile" clause

Approved by: @yingfeng, @fengttt, @daviszhen, @aressu1985

.gitignore

@@ -30,6 +30,7 @@ path_to_file
 test/resources/into_outfile/outfile_float_2.csv
 test/resources/into_outfile/outfile_integer_numbers_1.csv
 test/resources/into_outfile/outfile_time_date_2.csv
+test/resources/into_outfile/outfile_uuid.csv
 test/resources/into_outfile_2/outfile_float_2.csv
 test/resources/into_outfile_2/outfile_integer_numbers_1.csv
 test/resources/into_outfile_2/outfile_time_date_2.csv

pkg/frontend/export.go

@@ -375,6 +375,14 @@ func exportDataToCSVFile(oq *outputQueue) error {
 			if err = formatOutputString(oq, []byte(jsonStr), symbol[i], closeby, flag[i]); err != nil {
 				return err
 			}
+		case defines.MYSQL_TYPE_UUID:
+			value, err := oq.mrs.GetString(0, i)
+			if err != nil {
+				return err
+			}
+			if err = formatOutputString(oq, []byte(value), symbol[i], closeby, flag[i]); err != nil {
+				return err
+			}
 		case defines.MYSQL_TYPE_TIME:
 			return moerr.NewInternalError("unsupported DATE/DATETIME/TIMESTAMP/MYSQL_TYPE_TIME")
 		default:

test/cases/load_data/load_data.result

@@ -311,4 +311,11 @@ load data infile '$resources/load_data/uuid.csv' into table t7;
 select * from t7;
 a
 deec3a94-4653-11ed-940e-f6efd850eccd
+select * from t7 into outfile '$resources/into_outfile/outfile_uuid.csv';
+a
+delete from t7;
+load data infile '$resources/into_outfile/outfile_uuid.csv' into table t7 ignore 1 lines;
+select * from t7;
+a
+deec3a94-4653-11ed-940e-f6efd850eccd
 drop table t7;
\ No newline at end of file

test/cases/load_data/load_data.sql

@@ -189,4 +189,8 @@ drop table t6;
 create table t7 (a uuid);
 load data infile '$resources/load_data/uuid.csv' into table t7;
 select * from t7;
+select * from t7 into outfile '$resources/into_outfile/outfile_uuid.csv';
+delete from t7;
+load data infile '$resources/into_outfile/outfile_uuid.csv' into table t7 ignore 1 lines;
+select * from t7;
 drop table t7;