diff --git a/integration-tests/__tests__/alter-processor.spec.js b/integration-tests/__tests__/alter-processor.spec.js
index 13db05b55..b88024b0d 100644
--- a/integration-tests/__tests__/alter-processor.spec.js
+++ b/integration-tests/__tests__/alter-processor.spec.js
@@ -19,21 +19,35 @@ function checkTableStructure(t1, t2) {
 }
 
 async function testTableDiff(conn, driver, mangle) {
-  await driver.query(conn, 'create table t1 (col1 int not null)');
+  await driver.query(conn, `create table t0 (id int not null primary key)`);
 
+  await driver.query(
+    conn,
+    `create table t1 (
+    id int not null primary key, 
+    col_std int null, 
+    col_def int null default 12,
+    col_fk int null references t0(id),
+    col_idx int null
+  )`
+  );
+
+  await driver.query(conn, `create index idx1 on t1(col_idx)`);
+
+  const tget = x => x.tables.find(y => y.pureName == 't1');
   const structure1 = generateDbPairingId(extendDatabaseInfo(await driver.analyseFull(conn)));
   let structure2 = _.cloneDeep(structure1);
-  mangle(structure2.tables[0]);
+  mangle(tget(structure2));
   structure2 = extendDatabaseInfo(structure2);
 
-  const sql = getAlterTableScript(structure1.tables[0], structure2.tables[0], {}, structure2, driver);
+  const sql = getAlterTableScript(tget(structure1), tget(structure2), {}, structure2, driver);
   console.log('RUNNING ALTER SQL:', sql);
 
   await driver.query(conn, sql);
 
   const structure2Real = extendDatabaseInfo(await driver.analyseFull(conn));
 
-  checkTableStructure(structure2Real.tables[0], structure2.tables[0]);
+  checkTableStructure(tget(structure2Real), tget(structure2));
   // expect(stableStringify(structure2)).toEqual(stableStringify(structure2Real));
 }
 
@@ -50,14 +64,45 @@ describe('Alter processor', () => {
           autoIncrement: false,
         })
       );
-      // console.log('ENGINE', engine);
-      // for (const sql of initSql) await driver.query(conn, sql);
+    })
+  );
 
-      // await driver.query(conn, object.create1);
-      // const structure = await driver.analyseFull(conn);
+  test.each(engines.map(engine => [engine.label, engine]))(
+    'Drop column - %s',
+    testWrapper(async (conn, driver, engine) => {
+      await testTableDiff(conn, driver, tbl => (tbl.columns = tbl.columns.filter(x => x.columnName != 'col_std')));
+    })
+  );
 
-      // expect(structure[type].length).toEqual(1);
-      // expect(structure[type][0]).toEqual(type.includes('views') ? view1Match : obj1Match);
+  test.each(engines.map(engine => [engine.label, engine]))(
+    'Drop column with default - %s',
+    testWrapper(async (conn, driver, engine) => {
+      await testTableDiff(conn, driver, tbl => (tbl.columns = tbl.columns.filter(x => x.columnName != 'col_def')));
+    })
+  );
+
+  test.each(engines.map(engine => [engine.label, engine]))(
+    'Drop column with fk - %s',
+    testWrapper(async (conn, driver, engine) => {
+      await testTableDiff(conn, driver, tbl => (tbl.columns = tbl.columns.filter(x => x.columnName != 'col_fk')));
+    })
+  );
+
+  test.each(engines.map(engine => [engine.label, engine]))(
+    'Drop column with index - %s',
+    testWrapper(async (conn, driver, engine) => {
+      await testTableDiff(conn, driver, tbl => (tbl.columns = tbl.columns.filter(x => x.columnName != 'col_idx')));
+    })
+  );
+
+  test.each(engines.map(engine => [engine.label, engine]))(
+    'Change nullability - %s',
+    testWrapper(async (conn, driver, engine) => {
+      await testTableDiff(
+        conn,
+        driver,
+        tbl => (tbl.columns = tbl.columns.map(x => (x.columnName == 'col_std' ? { ...x, notNull: true } : x)))
+      );
     })
   );
 });
diff --git a/packages/tools/src/diffTools.ts b/packages/tools/src/diffTools.ts
index 3e04f48ea..d76033c38 100644
--- a/packages/tools/src/diffTools.ts
+++ b/packages/tools/src/diffTools.ts
@@ -217,7 +217,7 @@ function getTableConstraints(table: TableInfo) {
 function createPairs(oldList, newList, additionalCondition = null) {
   const res = [];
   for (const a of oldList) {
-    const b = newList.find(x => x.pairingId == a.pairingId || (additionalCondition && additionalCondition(a, b)));
+    const b = newList.find(x => x.pairingId == a.pairingId || (additionalCondition && additionalCondition(a, x)));
     if (b) {
       res.push([a, b]);
     } else {