chore: add more transaction test

tests/sqllogictests/suites/stage/copy_into_txn.sql

@@ -0,0 +1,113 @@
+#################################################################################################################
+# test avoiding duplicates when copy stage files into a table
+#################################################################################################################
+
+statement ok
+create or replace database test_txn_copy;
+
+statement ok
+use test_txn_copy;
+
+statement ok
+create table t1(c int);
+
+onlyif mysql
+statement ok
+begin;
+
+query
+copy into t1 from @data/csv/numbers.csv file_format = (type = CSV);
+----
+csv/numbers.csv 18 0 NULL NULL
+
+query I
+select count(*) from t1;
+----
+18
+
+query
+copy into t1 from @data/csv/numbers.csv file_format = (type = CSV);
+----
+
+
+query I
+select count(*) from t1;
+----
+18
+
+onlyif mysql
+statement ok
+commit;
+
+query I
+select count(*) from t1;
+----
+18
+
+query
+copy into t1 from @data/csv/numbers.csv file_format = (type = CSV);
+----
+
+
+query I
+select count(*) from t1;
+----
+18
+
+#################################################################################################################
+# test when txn is aborted, the stage files are not purged
+#################################################################################################################
+
+statement ok
+create or replace database test_txn_copy_1;
+
+statement ok
+use test_txn_copy_1;
+
+statement ok
+create table t1(c int);
+
+onlyif mysql
+statement ok
+begin;
+
+onlyif mysql
+query
+copy into t1 from @data/csv/numbers.csv file_format = (type = CSV) purge = true;
+----
+csv/numbers.csv 18 0 NULL NULL
+
+onlyif mysql
+statement error 1025
+select * from t100;
+
+onlyif mysql
+statement error 4002
+select * from t1;
+
+onlyif mysql
+statement ok
+commit;
+
+onlyif mysql
+query I
+select count(*) from t1;
+----
+0
+
+onlyif mysql
+statement ok
+create table t2(c int);
+
+onlyif mysql
+query
+copy into t2 from @data/csv/numbers.csv file_format = (type = CSV);
+----
+csv/numbers.csv 18 0 NULL NULL
+
+onlyif mysql
+query I
+select count(*) from t2;
+----
+18
+