Add test for issue #104

tests/test_issue104.py

@@ -0,0 +1,98 @@
+#!python3
+
+import os
+import time
+import shutil
+import unittest
+import psutil
+from chdb import session as chs
+
+tmp_dir = ".state_tmp_auxten_issue104"
+
+
+class TestIssue104(unittest.TestCase):
+    def setUp(self) -> None:
+        # shutil.rmtree(tmp_dir, ignore_errors=True)
+        return super().setUp()
+
+    def tearDown(self):
+        # shutil.rmtree(tmp_dir, ignore_errors=True)
+        return super().tearDown()
+
+    def test_issue104(self):
+        sess = chs.Session(tmp_dir)
+
+        sess.query("CREATE DATABASE IF NOT EXISTS test_db ENGINE = Atomic;")
+        # sess.query("CREATE DATABASE IF NOT EXISTS test_db ENGINE = Atomic;", "Debug")
+        sess.query("CREATE TABLE IF NOT EXISTS test_db.test_table (x String, y String) ENGINE = MergeTree ORDER BY tuple()")
+        sess.query("INSERT INTO test_db.test_table (x, y) VALUES ('A', 'B'), ('C', 'D');")
+
+        # show final thread count
+        print("Final thread count:", len(psutil.Process().threads()))
+
+        print("Original values:")
+        ret = sess.query("SELECT * FROM test_db.test_table", "Debug")
+        print(ret)
+        # self.assertEqual(str(ret), '"A","B"\n"C","D"\n')
+
+        # show final thread count
+        print("Final thread count:", len(psutil.Process().threads()))
+
+        print('Values after ALTER UPDATE in same query expected:')
+        ret = sess.query(
+            "ALTER TABLE test_db.test_table UPDATE y = 'updated1' WHERE x = 'A';"
+            "SELECT * FROM test_db.test_table WHERE x = 'A';")
+        print(ret)
+        self.assertEqual(str(ret), '"A","updated1"\n')
+
+        # show final thread count
+        print("Final thread count:", len(psutil.Process().threads()))
+
+        # print("Values after UPDATE in same query (expected 'A', 'updated'):")
+        # ret = sess.query(
+        #     "UPDATE test_db.test_table SET y = 'updated2' WHERE x = 'A';"
+        #     "SELECT * FROM test_db.test_table WHERE x = 'A';")
+        # print(ret)
+        # self.assertEqual(str(ret), '"A","updated2"\n')
+
+        print('Values after UPDATE expected:')
+        sess.query("ALTER TABLE test_db.test_table UPDATE y = 'updated2' WHERE x = 'A';"
+                   "ALTER TABLE test_db.test_table UPDATE y = 'updated3' WHERE x = 'A'")
+        ret = sess.query("SELECT * FROM test_db.test_table WHERE x = 'A'")
+        print(ret)
+        self.assertEqual(str(ret), '"A","updated3"\n')
+
+        # show final thread count
+        print("Final thread count:", len(psutil.Process().threads()))
+
+        print("Values after DELETE expected:")
+        sess.query("ALTER TABLE test_db.test_table DELETE WHERE x = 'A'")
+        ret = sess.query("SELECT * FROM test_db.test_table")
+        print(ret)
+        self.assertEqual(str(ret), '"C","D"\n')
+
+        # show final thread count
+        print("Final thread count:", len(psutil.Process().threads()))
+
+        print("Values after ALTER then OPTIMIZE expected:")
+        sess.query("ALTER TABLE test_db.test_table DELETE WHERE x = 'C'; OPTIMIZE TABLE test_db.test_table FINAL")
+        ret = sess.query("SELECT * FROM test_db.test_table")
+        print(ret)
+        self.assertEqual(str(ret), "")
+
+        print("Inserting 1000 rows")
+        sess.query("INSERT INTO test_db.test_table (x, y) SELECT toString(number), toString(number) FROM numbers(1000);")
+        ret = sess.query("SELECT count() FROM test_db.test_table", "Debug")
+        count = str(ret).count("\n")
+        print("Number of newline characters:", count)
+
+        # show final thread count
+        print("Final thread count:", len(psutil.Process().threads()))
+
+        time.sleep(3)
+        print("Final thread count after 3s:", len(psutil.Process().threads()))
+        self.assertEqual(len(psutil.Process().threads()), 1)
+
+
+if __name__ == "__main__":
+    unittest.main()