first commit

repositories/all_queries.py

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+queries_maria = {
+    "no_index": {
+        "query_1": """
+            ANALYZE SELECT name, title
+            FROM Auth IGNORE INDEX (idx_auth_pubid), Publ IGNORE INDEX(idx_publ_pubid)
+            WHERE Auth.pubID = Publ.pubID;
+        """,
+        "query_2": """
+            ANALYZE SELECT title
+            FROM Auth IGNORE INDEX (idx_auth_pubid), Publ IGNORE INDEX(idx_publ_pubid)
+            WHERE Auth.pubID = Publ.pubID AND Auth.name = 'Divesh Srivastava';
+        """,
+    },
+    "with_index": {
+        "query_1": """
+            ANALYZE SELECT name, title
+            FROM Auth, Publ
+            WHERE Auth.pubID = Publ.pubID;
+        """,
+        "query_2": """
+            ANALYZE SELECT title
+            FROM Auth, Publ
+            WHERE Auth.pubID = Publ.pubID AND Auth.name = 'Divesh Srivastava';
+        """,
+    },
+}
+
+queries_postgres = {
+    "no_index": {
+        "query_1": """
+            EXPLAIN ANALYZE SELECT name, title
+            FROM Auth, Publ
+            WHERE Auth.pubID = Publ.pubID;
+        """,
+        "query_2": """
+            EXPLAIN ANALYZE SELECT title
+            FROM Auth, Publ
+            WHERE Auth.pubID = Publ.pubID AND Auth.name = 'Divesh Srivastava';
+        """,
+    },
+    "with_index": {
+        "query_1": """
+            EXPLAIN ANALYZE SELECT name, title
+            FROM Auth, Publ
+            WHERE Auth.pubID = Publ.pubID;
+        """,
+        "query_2": """
+            EXPLAIN ANALYZE SELECT title
+            FROM Auth, Publ
+            WHERE Auth.pubID = Publ.pubID AND Auth.name = 'Divesh Srivastava';
+        """,
+    },
+}

repositories/hash_join_resolver.py

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+resolve = {
+    "postgresql": {
+        "disable": ["SET enable_nestloop = off", "SET enable_mergejoin = off"],
+        "reset": ["RESET enable_nestloop", "RESET enable_mergejoin"],
+    },
+    "mariadb": {
+        "disable": ["SET optimizer_switch='join_cache_hashed=on'", "SET join_cache_level=8"],
+        "reset": ["SET optimizer_switch=DEFAULT", "SET join_cache_level=DEFAULT"],
+    },
+}

repositories/nested_loop_resolver.py

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+# nestedLoopResolver.py
+resolve = {
+    "postgresql": {
+        "disable": ["SET enable_hashjoin = off", "SET enable_mergejoin = off"],
+        "reset": ["RESET enable_hashjoin", "RESET enable_mergejoin"],
+    },
+    "mariadb": {
+        "disable": ["SET optimizer_switch='block_nested_loop=off'"],
+        "reset": ["SET optimizer_switch=DEFAULT"],
+    },
+}

repositories/sort_merge_resolver.py

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+# sortMergeResolver.py
+resolve = {
+    "postgresql": {
+        "disable": ["SET enable_hashjoin = off", "SET enable_nestloop = off"],
+        "reset": ["RESET enable_hashjoin", "RESET enable_nestloop"],
+    },
+}