MySQL specific type converter

modules/activiti-engine/src/main/java/org/activiti/engine/impl/db/ActivitiMySQLTypeConverter.java

+package org.activiti.engine.impl.db;
+
+import liquibase.database.structure.type.BlobType;
+import liquibase.database.structure.type.BooleanType;
+import liquibase.database.structure.type.DataType;
+import liquibase.database.structure.type.DateTimeType;
+import liquibase.database.structure.type.IntType;
+import liquibase.database.structure.type.NVarcharType;
+import liquibase.database.structure.type.VarcharType;
+import liquibase.database.typeconversion.core.MySQLTypeConverter;
+
+public class ActivitiMySQLTypeConverter extends MySQLTypeConverter {
+  
+  @Override
+  public int getPriority() {
+    return PRIORITY_DATABASE + 1;
+  }
+ 
+  @Override
+  protected DataType getDataType(final String columnTypeString,
+      final Boolean autoIncrement, final String dataTypeName,
+      final String precision, final String additionalInformation) {
+
+    DataType dataType = super.getDataType(columnTypeString, autoIncrement,
+        dataTypeName, precision, additionalInformation);
+    if (dataType instanceof NVarcharType) {
+      dataType = new VarcharType();
+      dataType.setFirstParameter(precision);
+    }
+    return dataType;
+  }
+  
+  @Override
+  public BooleanType getBooleanType() {
+    return new BooleanType("TINYINT");
+  }
+
+  @Override
+  public IntType getIntType() {
+    return new IntType("integer");
+  }
+  
+  @Override
+  public DateTimeType getDateTimeType() {
+    return new DateTimeType("datetime");
+  }
+
+  @Override
+  public BlobType getBlobType() {
+    return new BlobType("LONGBLOB");
+  }
+}

modules/activiti-engine/src/main/java/org/activiti/engine/impl/db/DbSqlSessionFactory.java

@@ -103,6 +103,7 @@ public class DbSqlSessionFactory implements SessionFactory {
     addDatabaseSpecificStatement("mssql", "selectExclusiveJobsToExecute", "selectExclusiveJobsToExecute_integerBoolean");
     
     TypeConverterFactory.getInstance().register(new ActivitiDb2TypeConverter());
+    TypeConverterFactory.getInstance().register(new ActivitiMySQLTypeConverter());
     TypeConverterFactory.getInstance().register(new ActivitiOracleTypeConverter());
   }