diff --git a/plugins/org.jkiss.dbeaver.ext.mockdata/plugin.xml b/plugins/org.jkiss.dbeaver.ext.mockdata/plugin.xml
index 70ad0778ddb110a6bc70906767a76a779e62248f..1204dd6cd6b6c76e5c7253f2274cfecee655d82f 100644
--- a/plugins/org.jkiss.dbeaver.ext.mockdata/plugin.xml
+++ b/plugins/org.jkiss.dbeaver.ext.mockdata/plugin.xml
@@ -43,7 +43,7 @@
                 <property id="template" label="Template" type="string" description="Source of substrings"
                     defaultValue="Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."/>
                 <property id="minLength" label="Min Length" type="integer" defaultValue="1" description="Minimum length"/>
-                <property id="maxLength" label="Max Length" type="integer" description="Maximum length (0 means the column length)"/>
+                <property id="maxLength" label="Max Length" type="integer" defaultValue="100" description="Maximum length (0 means the column length)"/>
 
                 <property id="nulls" label="NULLs" type="integer" defaultValue="10" description="NULL values (%)"/>
             </propertyGroup>
diff --git a/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/MockDataExecuteWizard.java b/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/MockDataExecuteWizard.java
index 55c4dec352210ec744d6ccc348a8f59adbe5623e..79f0c4f37230fc9bc991aace1eb9ef16d00a0544 100644
--- a/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/MockDataExecuteWizard.java
+++ b/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/MockDataExecuteWizard.java
@@ -174,7 +174,7 @@ public class MockDataExecuteWizard  extends AbstractToolWizard<DBSDataManipulato
                 } catch (Exception e) {
                     String message = "    Error removing the data: " + e.getMessage() + ".";
                     log.error(message, e);
-                    logPage.appendLog(message, true);
+                    logPage.appendLog(message + "\n", true);
                 } finally {
                     monitor.done();
                 }
@@ -242,9 +242,19 @@ public class MockDataExecuteWizard  extends AbstractToolWizard<DBSDataManipulato
                         }
                         insertStats.accumulate(batch.execute(session));
                     }
+                    catch (Exception e) {
+                        String message = "    Error generating Mock Data: " + e.getMessage() + ".";
+                        log.error(message, e);
+                        logPage.appendLog(message + "\n", true);
+                        if (e instanceof DBException) {
+                            throw e;
+                        }
+                    }
                     finally {
-                        batch.close();
-                        batch = null;
+                        if (batch != null) {
+                            batch.close();
+                            batch = null;
+                        }
                     }
                 }
 
diff --git a/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/MockDataSettings.java b/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/MockDataSettings.java
index b6f502beb436b3354868968cc1557b0e66fc0c79..5e753586d78e2fd791b75d6e80e0dfe0cb0a34e4 100644
--- a/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/MockDataSettings.java
+++ b/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/MockDataSettings.java
@@ -42,7 +42,9 @@ public class MockDataSettings {
     public static final String PROP_REMOVE_OLD_DATA = "removeOldData"; //$NON-NLS-1$
     public static final String PROP_ROWS_NUMBER = "rowsNumber"; //$NON-NLS-1$
 
+    public static final String KEY_SELECTED_ATTRIBUTE = "selectedAttribute"; //$NON-NLS-1$
     public static final String KEY_SELECTED_GENERATOR = "selectedGenerator"; //$NON-NLS-1$
+    public static final String KEY_PRESET_ID = "presetId"; //$NON-NLS-1$
     public static final String KEY_GENERATOR_SECTION = "GENERATOR_SECTION"; //$NON-NLS-1$
 
     private DBSEntity dbsEntity;
@@ -51,6 +53,7 @@ public class MockDataSettings {
     private boolean removeOldData;
     private long rowsNumber = 1000;
 
+    private String selectedAttribute; // attribute.name
     private Map<String, MockGeneratorDescriptor> generatorDescriptors = new HashMap<>(); // generatorId -> MockGeneratorDescriptor
     private Map<String, AttributeGeneratorProperties> attributeGenerators = new HashMap<>(); // attribute.name -> generators properties
 
@@ -105,6 +108,14 @@ public class MockDataSettings {
         return attributes;
     }
 
+    public String getSelectedAttribute() {
+        return selectedAttribute;
+    }
+
+    public void setSelectedAttribute(String selectedAttribute) {
+        this.selectedAttribute = selectedAttribute;
+    }
+
     private void putGenerator(AttributeGeneratorProperties generatorProperties, MockGeneratorDescriptor generator) {
         generatorDescriptors.put(generator.getId(), generator);
         generatorProperties.putGeneratorPropertySource(generator.getId(), new PropertySourceCustom(generator.getProperties(), null));
@@ -158,6 +169,7 @@ public class MockDataSettings {
         }
 
         // load selected generators
+        selectedAttribute = dialogSettings.get(KEY_SELECTED_ATTRIBUTE);
         VoidProgressMonitor voidProgressMonitor = new VoidProgressMonitor();
         IDialogSettings tableSection = UIUtils.getSettingsSection(dialogSettings, dbsEntity.getName());
         for (Map.Entry<String, AttributeGeneratorProperties> entry : attributeGenerators.entrySet()) {
@@ -167,6 +179,7 @@ public class MockDataSettings {
             if (selectedGeneratorId != null) {
                 AttributeGeneratorProperties attrGeneratorProperties = entry.getValue();
                 attrGeneratorProperties.setSelectedGeneratorId(selectedGeneratorId);
+                attrGeneratorProperties.setPresetId(attributeSection.get(KEY_PRESET_ID));
 
                 PropertySourceCustom generatorPropertySource = attrGeneratorProperties.getGeneratorPropertySource(selectedGeneratorId);
                 IDialogSettings generatorSection = UIUtils.getSettingsSection(attributeSection, KEY_GENERATOR_SECTION);
@@ -190,6 +203,7 @@ public class MockDataSettings {
         dialogSettings.put(PROP_ROWS_NUMBER, rowsNumber);
 
         // save selected generators
+        dialogSettings.put(KEY_SELECTED_ATTRIBUTE, selectedAttribute);
         IDialogSettings tableSection = UIUtils.getSettingsSection(dialogSettings, dbsEntity.getName());
         for (Map.Entry<String, AttributeGeneratorProperties> attrEntry : attributeGenerators.entrySet()) {
             String attributeName = attrEntry.getKey();
@@ -198,6 +212,7 @@ public class MockDataSettings {
             IDialogSettings attributeSection = UIUtils.getSettingsSection(tableSection, attributeName);
             String selectedGeneratorId = attrGeneratorProperties.getSelectedGeneratorId();
             attributeSection.put(KEY_SELECTED_GENERATOR, selectedGeneratorId);
+            attributeSection.put(KEY_PRESET_ID, attrGeneratorProperties.getPresetId());
 
             IDialogSettings generatorSection = UIUtils.getSettingsSection(attributeSection, KEY_GENERATOR_SECTION);
             PropertySourceCustom generatorPropertySource = attrGeneratorProperties.getGeneratorPropertySource(selectedGeneratorId);
@@ -212,12 +227,17 @@ public class MockDataSettings {
 
     public class AttributeGeneratorProperties {
         private final DBSAttributeBase attribute;
-        private String selectedGeneratorId = null; // id
+        private String selectedGeneratorId = null;
+        private String presetId = null;
         private Map<String, PropertySourceCustom> generators = new HashMap<>(); // generatorId -> PropertySourceCustom
+
         public AttributeGeneratorProperties(DBSAttributeBase attribute) {
             this.attribute = attribute;
         }
-        public DBSAttributeBase getAttribute() { return attribute; }
+
+        public DBSAttributeBase getAttribute() {
+            return attribute;
+        }
 
         public String getSelectedGeneratorId() {
             if (selectedGeneratorId == null && !CommonUtils.isEmpty(getGenerators())) {
@@ -234,7 +254,10 @@ public class MockDataSettings {
             if ((selectedGeneratorId == null || !generatorDescriptors.keySet().contains(selectedGeneratorId)) && !CommonUtils.isEmpty(getGenerators())) {
                 selectedGeneratorId = getGenerators().iterator().next();
             }
-            this.selectedGeneratorId = selectedGeneratorId;
+            if (this.selectedGeneratorId != selectedGeneratorId) {
+                this.selectedGeneratorId = selectedGeneratorId;
+                presetId = null;
+            }
             return selectedGeneratorId;
         }
 
@@ -249,6 +272,14 @@ public class MockDataSettings {
             return generators.get(generatorId);
         }
 
+        public String getPresetId() {
+            return presetId;
+        }
+
+        public void setPresetId(String presetId) {
+            this.presetId = presetId;
+        }
+
         public boolean isEmpty() {
             return generators.isEmpty();
         }
diff --git a/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/MockDataWizardPageSettings.java b/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/MockDataWizardPageSettings.java
index bc5341dc6e514991e61ab3a108fa6e549a607ad2..e68061764aa3d20243d13c5ea6ef5cc4f6ecb6f6 100644
--- a/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/MockDataWizardPageSettings.java
+++ b/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/MockDataWizardPageSettings.java
@@ -31,6 +31,8 @@ import org.jkiss.dbeaver.Log;
 import org.jkiss.dbeaver.ext.mockdata.MockDataSettings.AttributeGeneratorProperties;
 import org.jkiss.dbeaver.ext.mockdata.model.MockGeneratorDescriptor;
 import org.jkiss.dbeaver.model.DBValueFormatting;
+import org.jkiss.dbeaver.model.preferences.DBPPropertyDescriptor;
+import org.jkiss.dbeaver.model.runtime.VoidProgressMonitor;
 import org.jkiss.dbeaver.model.struct.DBSAttributeBase;
 import org.jkiss.dbeaver.runtime.properties.PropertySourceCustom;
 import org.jkiss.dbeaver.ui.DBeaverIcons;
@@ -60,6 +62,7 @@ public class MockDataWizardPageSettings extends ActiveWizardPage<MockDataExecute
     private DBSAttributeBase selectedAttribute;
     private boolean firstInit = true;
     private Combo generatorCombo;
+    private Combo presetCombo;
     private Label generatorDescriptionLabel;
     private Link generatorDescriptionLink;
 
@@ -143,14 +146,25 @@ public class MockDataWizardPageSettings extends ActiveWizardPage<MockDataExecute
                     if (cell.getColumnIndex() == 0) {
                         cell.setImage(DBeaverIcons.getImage(DBValueFormatting.getTypeImage(attribute)));
                         cell.setText(attribute.getName());
-                        if (attributeGeneratorProperties.isEmpty()) {
+                        if (attributeGeneratorProperties != null && attributeGeneratorProperties.isEmpty()) {
                             cell.setForeground(table.getDisplay().getSystemColor(SWT.COLOR_RED));
                             noGeneratorInfoLabel.setVisible(true);
                         }
                     } else {
-                        if (!attributeGeneratorProperties.isEmpty()) {
-                            String selectedGenerator = attributeGeneratorProperties.getSelectedGeneratorId();
-                            cell.setText(mockDataSettings.getGeneratorDescriptor(selectedGenerator).getLabel());
+                        if (attributeGeneratorProperties != null && !attributeGeneratorProperties.isEmpty()) {
+                            String selectedGeneratorId = attributeGeneratorProperties.getSelectedGeneratorId();
+                            String label = mockDataSettings.getGeneratorDescriptor(selectedGeneratorId).getLabel();
+                            String presetId = attributeGeneratorProperties.getPresetId();
+                            if (presetId != null) {
+                                List<MockGeneratorDescriptor.Preset> presets = mockDataSettings.getGeneratorDescriptor(selectedGeneratorId).getPresets();
+                                for (MockGeneratorDescriptor.Preset preset : presets) {
+                                    if (presetId.equals(preset.getId())) {
+                                        label += " [" + preset.getMnemonics() + "]";
+                                        break;
+                                    }
+                                }
+                            }
+                            cell.setText(label);
                         }
                     }
                 }
@@ -224,7 +238,7 @@ public class MockDataWizardPageSettings extends ActiveWizardPage<MockDataExecute
             Composite placeholder = UIUtils.createPlaceholder(generatorsGroup, 1);
             placeholder.setLayoutData(new GridData(GridData.FILL_BOTH));
 
-            Composite labelCombo = UIUtils.createPlaceholder(placeholder, 4);
+            Composite labelCombo = UIUtils.createPlaceholder(placeholder, 5);
             gd = new GridData(GridData.FILL_HORIZONTAL);
             labelCombo.setLayoutData(gd);
 
@@ -267,6 +281,18 @@ public class MockDataWizardPageSettings extends ActiveWizardPage<MockDataExecute
             gd.horizontalIndent = 5;
             generatorDescriptionLink.setLayoutData(gd);
 
+            presetCombo = new Combo(labelCombo, SWT.READ_ONLY | SWT.DROP_DOWN);
+            gd = new GridData();
+            gd.horizontalIndent = 5;
+            presetCombo.setLayoutData(gd);
+            presetCombo.setVisible(false);
+            presetCombo.addSelectionListener(new SelectionAdapter() {
+                @Override
+                public void widgetSelected(SelectionEvent e) {
+                    selectPreset(presetCombo.getText());
+                }
+            });
+
             Button resetButton = new Button(labelCombo, SWT.PUSH);
             resetButton.setText("Reset");
             resetButton.addSelectionListener(new SelectionAdapter() {
@@ -276,6 +302,12 @@ public class MockDataWizardPageSettings extends ActiveWizardPage<MockDataExecute
                         propertySource.resetPropertyValueToDefault(key);
                     }
                     propsEditor.loadProperties(propertySource);
+
+                    mockDataSettings.getAttributeGeneratorProperties(selectedAttribute).setPresetId(null);
+                    if (presetCombo.getItemCount() > 0) {
+                        presetCombo.select(0);
+                    }
+                    columnsTableViewer.refresh(true, true);
                 }
             });
             gd = new GridData();
@@ -319,6 +351,29 @@ public class MockDataWizardPageSettings extends ActiveWizardPage<MockDataExecute
         columnsTableViewer.refresh(true, true);
     }
 
+    private void selectPreset(String presetName) {
+        AttributeGeneratorProperties attributeGeneratorProperties = mockDataSettings.getAttributeGeneratorProperties(selectedAttribute);
+        String generatorId = attributeGeneratorProperties.getSelectedGeneratorId();
+        List<MockGeneratorDescriptor.Preset> presets = mockDataSettings.getGeneratorDescriptor(generatorId).getPresets();
+        for (MockGeneratorDescriptor.Preset preset : presets) {
+
+            // Apply the preset
+            if (preset.getLabel().equals(presetName)) {
+                propertySource = attributeGeneratorProperties.getGeneratorPropertySource(generatorId);
+                VoidProgressMonitor monitor = new VoidProgressMonitor();
+                for (DBPPropertyDescriptor prop : preset.getProperties()) {
+                    propertySource.setPropertyValue(monitor, prop.getId(), prop.getDefaultValue());
+                }
+                propsEditor.loadProperties(propertySource);
+                propsEditor.setExpandMode(PropertyTreeViewer.ExpandMode.FIRST);
+                propsEditor.expandAll();
+
+                attributeGeneratorProperties.setPresetId(preset.getId());
+                columnsTableViewer.refresh(true, true);
+            }
+        }
+    }
+
     @Override
     public void activatePage() {
 
@@ -335,15 +390,24 @@ public class MockDataWizardPageSettings extends ActiveWizardPage<MockDataExecute
                 columnsTableViewer.setInput(mockDataSettings.getAttributes());
             }
 
-            // select the first item
+            // select the attributes table item
             final Table table = columnsTableViewer.getTable();
             if (table.getItemCount() > 0) {
-                table.select(0);
+                int selectedItem = 0;
+                String selectedAttribute = mockDataSettings.getSelectedAttribute();
+                if (selectedAttribute != null) {
+                    for (int i = 0; i < table.getItemCount(); i++) {
+                        if (selectedAttribute.equals(table.getItem(i).getText())) {
+                            selectedItem = i; break;
+                        }
+                    }
+                }
+                table.select(selectedItem);
                 // and notify the listeners
                 Event event = new Event();
                 event.widget = table;
                 event.display = table.getDisplay();
-                event.item = table.getItem(0);
+                event.item = table.getItem(selectedItem);
                 event.type = SWT.Selection;
                 table.notifyListeners(SWT.Selection, event);
             } else {
@@ -408,7 +472,10 @@ public class MockDataWizardPageSettings extends ActiveWizardPage<MockDataExecute
             }
         }
         selectedAttribute = attribute;
+        mockDataSettings.setSelectedAttribute(attribute.getName());
         generatorId = attributeGeneratorProperties.setSelectedGeneratorId(generatorId);
+
+        // set properties
         propertySource = attributeGeneratorProperties.getGeneratorPropertySource(generatorId);
         if (propertySource != null) {
             propsEditor.loadProperties(propertySource);
@@ -418,6 +485,8 @@ public class MockDataWizardPageSettings extends ActiveWizardPage<MockDataExecute
             propsEditor.clearProperties();
         }
 
+        // generator combo & description
+        presetCombo.setVisible(false);
         List<String> generators = new ArrayList<>();
         for (String genId : attributeGeneratorProperties.getGenerators()) {
             generators.add(mockDataSettings.getGeneratorDescriptor(genId).getLabel());
@@ -435,6 +504,23 @@ public class MockDataWizardPageSettings extends ActiveWizardPage<MockDataExecute
                 generatorDescriptionLink.setVisible(true);
             }
 
+            // presets
+            List<MockGeneratorDescriptor.Preset> presets = generatorDescriptor.getPresets();
+            if (!presets.isEmpty()) {
+                presetCombo.removeAll();
+                presetCombo.add("Select preset...");
+                int presetIndex = 0, i = 1;
+                String presetId = attributeGeneratorProperties.getPresetId();
+                for (MockGeneratorDescriptor.Preset preset : presets) {
+                    presetCombo.add(preset.getLabel());
+                    if (presetId != null && preset.getId().equals(presetId)) {
+                        presetIndex = i;
+                    }
+                    i++;
+                }
+                presetCombo.select(presetIndex);
+                presetCombo.setVisible(true);
+            }
         } else {
             generatorCombo.setItems(new String[] {"Not found"});
             generatorCombo.setText("Not found");
diff --git a/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/generator/StringTextGenerator.java b/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/generator/StringTextGenerator.java
index 6d32eb61bb892997609f2192abc3fcbd1f53ab1d..dbdde1029d5f0c6fb2b8199268a361a1e437fc79 100644
--- a/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/generator/StringTextGenerator.java
+++ b/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/generator/StringTextGenerator.java
@@ -34,7 +34,7 @@ public class StringTextGenerator extends AbstractMockValueGenerator {
 
     private String templateString;
     private int minLength = 1;
-    private int maxLength = 0;
+    private int maxLength = 100;
 
     @Override
     public void init(DBSDataManipulator container, DBSAttributeBase attribute, Map<Object, Object> properties) throws DBException {
@@ -55,10 +55,10 @@ public class StringTextGenerator extends AbstractMockValueGenerator {
             this.maxLength = max;
         }
 
-        if (maxLength == 0 || maxLength > attribute.getMaxLength()) {
+        if (maxLength == 0 || (attribute.getMaxLength() > 0 && maxLength > attribute.getMaxLength())) {
             maxLength = (int) attribute.getMaxLength();
         }
-        if (maxLength > templateString.length()) {
+        if (maxLength > templateString.length()) { // TODO check templateString shouldn't be empty
             maxLength = templateString.length();
         }
     }
diff --git a/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/model/MockGeneratorDescriptor.java b/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/model/MockGeneratorDescriptor.java
index 6aa0db51c0f017d18ed8d973a158aa57db4983fd..d4cb58a11af65acf8f56d201847dc199cad17d58 100644
--- a/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/model/MockGeneratorDescriptor.java
+++ b/plugins/org.jkiss.dbeaver.ext.mockdata/src/org/jkiss/dbeaver/ext/mockdata/model/MockGeneratorDescriptor.java
@@ -35,12 +35,15 @@ public class MockGeneratorDescriptor extends DataTypeAbstractDescriptor<MockValu
 
     public static final String EXTENSION_ID = "org.jkiss.dbeaver.mockGenerator"; //$NON-NLS-1$
 
+    public static final String TAG_PRESET = "preset"; //NON-NLS-1
+
     private final String label;
     private final String description;
     private final String link;
     private final String url;
     private final DBPImage icon;
     private List<DBPPropertyDescriptor> properties = new ArrayList<>();
+    private List<Preset> presets = new ArrayList<>();
 
     public MockGeneratorDescriptor(IConfigurationElement config)
     {
@@ -54,6 +57,15 @@ public class MockGeneratorDescriptor extends DataTypeAbstractDescriptor<MockValu
         for (IConfigurationElement prop : config.getChildren(PropertyDescriptor.TAG_PROPERTY_GROUP)) {
             properties.addAll(PropertyDescriptor.extractProperties(prop));
         }
+
+        for (IConfigurationElement preset : config.getChildren(TAG_PRESET)) {
+            presets.add(new Preset(
+                    preset.getAttribute("id"),
+                    preset.getAttribute("label"),
+                    preset.getAttribute("mnemonics"),
+                    PropertyDescriptor.extractProperties(preset)
+            ));
+        }
     }
 
     public String getLabel() {
@@ -94,4 +106,37 @@ public class MockGeneratorDescriptor extends DataTypeAbstractDescriptor<MockValu
         return createInstance();
     }
 
+    public List<Preset> getPresets() {
+        return presets;
+    }
+
+    public static class Preset {
+        private final String id;
+        private final String label;
+        private final String mnemonics;
+        private final List<DBPPropertyDescriptor> properties;
+
+        public Preset(String id, String label, String mnemonics, List<DBPPropertyDescriptor> properties) {
+            this.id = id;
+            this.label = label;
+            this.mnemonics = mnemonics;
+            this.properties = properties;
+        }
+
+        public String getId() {
+            return id;
+        }
+
+        public String getLabel() {
+            return label;
+        }
+
+        public String getMnemonics() {
+            return mnemonics;
+        }
+
+        public List<DBPPropertyDescriptor> getProperties() {
+            return properties;
+        }
+    }
 }