diff --git a/packages/engines/default/DatabaseAnalyser.js b/packages/engines/default/DatabaseAnalyser.js
index af3c68d8f..251b49a4f 100644
--- a/packages/engines/default/DatabaseAnalyser.js
+++ b/packages/engines/default/DatabaseAnalyser.js
@@ -21,9 +21,9 @@ class DatabaseAnalyser {
 
   /** @returns {Promise<import('@dbgate/types').DatabaseModification[]>} */
   async getModifications() {
-    if (this.structure != null) throw new Error('DatabaseAnalyse.getModifications - structure must not be filled');
+    if (this.structure == null) throw new Error('DatabaseAnalyse.getModifications - structure must be filled');
 
-    return [];
+    return null;
   }
 
   async fullAnalysis() {
@@ -34,6 +34,11 @@ class DatabaseAnalyser {
     this.structure = structure;
 
     this.modifications = await this.getModifications();
+    if (this.modifications == null) {
+      // modifications not implemented, perform full analysis
+      this.structure = null;
+      return this._runAnalysis();
+    }
     if (this.modifications.length == 0) return null;
     console.log('DB modifications detected:', this.modifications);
     return this._runAnalysis();
diff --git a/packages/engines/mssql/index.js b/packages/engines/mssql/index.js
index 2f2f84a32..fcea0209c 100644
--- a/packages/engines/mssql/index.js
+++ b/packages/engines/mssql/index.js
@@ -109,11 +109,11 @@ const driver = {
   },
   async analyseFull(pool) {
     const analyser = new MsSqlAnalyser(pool, this);
-    return await analyser.fullAnalysis();
+    return analyser.fullAnalysis();
   },
   async analyseIncremental(pool, structure) {
     const analyser = new MsSqlAnalyser(pool, this);
-    return await analyser.incrementalAnalysis(structure);
+    return analyser.incrementalAnalysis(structure);
   },
   createDumper() {
     return new MsSqlDumper(this);
diff --git a/packages/engines/mysql/MySqlAnalyser.js b/packages/engines/mysql/MySqlAnalyser.js
index 995d22028..bcf9cd1ff 100644
--- a/packages/engines/mysql/MySqlAnalyser.js
+++ b/packages/engines/mysql/MySqlAnalyser.js
@@ -15,25 +15,27 @@ class MySqlAnalyser extends DatabaseAnalayser {
     res = res.replace('#DATABASE#', this.pool._database_name);
     return res;
   }
-  async runAnalysis() {
+  async _runAnalysis() {
     const tables = await this.driver.query(this.pool, this.createQuery('tables'));
     const columns = await this.driver.query(this.pool, this.createQuery('columns'));
     //   const pkColumns = await this.driver.query(this.pool, this.createQuery('primary_keys.sql'));
     //   const fkColumns = await this.driver.query(this.pool, this.createQuery('foreign_keys.sql'));
 
-    this.result.tables = tables.rows.map((table) => ({
-      ...table,
-      columns: columns.rows
-        .filter((col) => col.pureName == table.pureName)
-        .map(({ isNullable, extra, ...col }) => ({
-          ...col,
-          notNull: !isNullable,
-          autoIncrement: extra && extra.toLowerCase().includes('auto_increment'),
-        })),
-      foreignKeys: [],
-      // primaryKey: extractPrimaryKeys(table, pkColumns.rows),
-      // foreignKeys: extractForeignKeys(table, fkColumns.rows),
-    }));
+    return this.mergeAnalyseResult({
+      tables: tables.rows.map((table) => ({
+        ...table,
+        columns: columns.rows
+          .filter((col) => col.pureName == table.pureName)
+          .map(({ isNullable, extra, ...col }) => ({
+            ...col,
+            notNull: !isNullable,
+            autoIncrement: extra && extra.toLowerCase().includes('auto_increment'),
+          })),
+        foreignKeys: [],
+        // primaryKey: extractPrimaryKeys(table, pkColumns.rows),
+        // foreignKeys: extractForeignKeys(table, fkColumns.rows),
+      })),
+    });
   }
 }
 
diff --git a/packages/engines/mysql/index.js b/packages/engines/mysql/index.js
index 4962d452f..670ae9bc4 100644
--- a/packages/engines/mysql/index.js
+++ b/packages/engines/mysql/index.js
@@ -42,8 +42,11 @@ const driver = {
   },
   async analyseFull(pool) {
     const analyser = new MySqlAnalyser(pool, this);
-    await analyser.runAnalysis();
-    return analyser.result;
+    return analyser.fullAnalysis();
+  },
+  async analyseIncremental(pool, structure) {
+    const analyser = new MySqlAnalyser(pool, this);
+    return analyser.incrementalAnalysis(structure);
   },
   async listDatabases(connection) {
     const { rows } = await this.query(connection, "show databases");
diff --git a/packages/engines/postgres/PostgreAnalyser.js b/packages/engines/postgres/PostgreAnalyser.js
index 007bff8da..4c0436e54 100644
--- a/packages/engines/postgres/PostgreAnalyser.js
+++ b/packages/engines/postgres/PostgreAnalyser.js
@@ -14,24 +14,26 @@ class MySqlAnalyser extends DatabaseAnalayser {
     res = res.replace('=[OBJECT_ID_CONDITION]', ' is not null');
     return res;
   }
-  async runAnalysis() {
+  async _runAnalysis() {
     const tables = await this.driver.query(this.pool, this.createQuery('tableModifications'));
     const columns = await this.driver.query(this.pool, this.createQuery('columns'));
     //   const pkColumns = await this.driver.query(this.pool, this.createQuery('primary_keys.sql'));
     //   const fkColumns = await this.driver.query(this.pool, this.createQuery('foreign_keys.sql'));
 
-    this.result.tables = tables.rows.map((table) => ({
-      ...table,
-      columns: columns.rows
-        .filter((col) => col.pureName == table.pureName && col.schemaName == table.schemaName)
-        .map(({ isNullable, ...col }) => ({
-          ...col,
-          notNull: !isNullable,
-        })),
-      foreignKeys: [],
-      // primaryKey: extractPrimaryKeys(table, pkColumns.rows),
-      // foreignKeys: extractForeignKeys(table, fkColumns.rows),
-    }));
+    return this.mergeAnalyseResult({
+      tables: tables.rows.map((table) => ({
+        ...table,
+        columns: columns.rows
+          .filter((col) => col.pureName == table.pureName && col.schemaName == table.schemaName)
+          .map(({ isNullable, ...col }) => ({
+            ...col,
+            notNull: !isNullable,
+          })),
+        foreignKeys: [],
+        // primaryKey: extractPrimaryKeys(table, pkColumns.rows),
+        // foreignKeys: extractForeignKeys(table, fkColumns.rows),
+      })),
+    });
   }
 }
 
diff --git a/packages/engines/postgres/index.js b/packages/engines/postgres/index.js
index b1aa3c6a3..df55521c1 100644
--- a/packages/engines/postgres/index.js
+++ b/packages/engines/postgres/index.js
@@ -29,8 +29,11 @@ const driver = {
   },
   async analyseFull(pool) {
     const analyser = new PostgreAnalyser(pool, this);
-    await analyser.runAnalysis();
-    return analyser.result;
+    return analyser.fullAnalysis();
+  },
+  async analyseIncremental(pool, structure) {
+    const analyser = new PostgreAnalyser(pool, this);
+    return analyser.incrementalAnalysis(structure);
   },
   createDumper() {
     return new PostgreDumper(this);
diff --git a/packages/types/dbinfo.d.ts b/packages/types/dbinfo.d.ts
index d0a8a5efe..e8b280b3a 100644
--- a/packages/types/dbinfo.d.ts
+++ b/packages/types/dbinfo.d.ts
@@ -1,4 +1,4 @@
-import { DbType } from './DbType';
+import { DbType } from './dbtypes';
 
 export interface NamedObjectInfo {
   pureName: string;