MySQL

Requirements

MySQL support relies on the DevArt MySqlConnect .NET provider v5.x or higher. The Express edition is enough. To be able to create a model from an existing MySQL schema, you have to have access to a MySQL instance v4.1 or higher.

Supported features

Feature Supported
Minimal database version v4.1
Database types All built-in types
User defined types No
Foreign key constraints Yes (Not on v4.x)
Primary key constraints Yes
Unique constraints Yes
Check constraints No
Default values Yes
Unique indexes No
Tables Yes
Views Yes
Stored Procedures Yes (Not on v4.x)
Table Valued Functions No
(System versioned) Temporal tables No
Synonyms No
Cascade delete rules No
Cascade update rules No
Identity fields Yes
System sequences Yes
Schema based sequences No
Multiple catalogs per project Yes
Multiple schemas per catalog No
Linked servers No
Info

SQL Server 2016+: History tables of a temporal table pair are filtered out and are not included in schema data.

Type mappings

Below you'll find the two type mapping tables used by the MySQL driver of LLBLGen Pro. One is used for Database First development, the other is used for Model First development. In case of Model First development, you can add your own type shortcuts to define a different target database type, in case the default mappings aren't what you need in a particular case.

Global model-first type overruling

For Model first, there are often multiple database types defined per .NET Type and a given filter. To prefer one over the other on a global level, please look at the following settings in the Relational model data element construction section of the Project Settings:

  • Prefer natural character types
  • Prefer decimal over currency types
  • Prefer variable length types

Database first type mappings

You can control the .NET type during reverse engineering in database first development by defining Type Conversions in the Project Settings, which are based on Type Converters.

Database type .NET Type
BigIntUnsigned System.Decimal
BigInt System.Int64
Binary System.Byte[]
Blob System.Byte[]
Char System.String
DateTime System.DateTime
Date System.DateTime
Decimal System.Decimal
Double System.Double
Float System.Single
IntegerUnsigned System.Int64
Integer System.Int32
LongBlob System.Byte[]
LongText System.String
Long Varchar System.String
MediumBlob System.Byte[]
MediumText System.String
Numeric System.Decimal
SmallIntUnsigned System.Int32
SmallInt System.Int16
Text System.String
Timestamp System.DateTime
Time System.TimeSpan
TinyBlob System.Byte[]
TinyIntUnsigned System.Byte
TinyInt System.Int16
TinyText System.String
VarBinary System.Byte[]
VarChar System.String
Year System.Int16

Model first type mappings

If specified, the filter is combined with the .NET type to determine the database type. The elements length, precision and scale are the max. length, precision and scale of an entity field with the particular .NET Type. For instance a field with type System.String, max. length set to 50, will with all defaults enabled, a database type of NVarChar(50).

If a controlling setting is specified, that setting has to be set to the specified value (in the Relational model data element construction section of the Project Settings) to make the designer select that database type.

.NET Type Filter Database type Controlling setting and value
System.Byte TinyIntUnsigned
System.Byte[] length==0 or length >= 16777216 LongBlob
System.Byte[] 65536 <= length < 16777216 MediumBlob
System.Byte[] 256 < length < 65536 Binary(length) Prefer variable length types set to false
System.Byte[] 256 < length < 65536 VarBinary(length) Prefer variable length types set to True
System.Byte[] 0 < length < 256 TinyBlob
System.DateTime DateTime
System.Decimal precision > 0 and scale == 0 BigIntUnsigned
System.Decimal Decimal(precision, scale)
System.Double Double
System.Int16 SmallInt
System.Int32 Integer
System.Int64 BigInt
System.Single Float
System.String length==0 or length >= 16777216 LongText
System.String 65536 <= length < 16777216 MediumText
System.String 256 <= length < 65536 VarChar(length) Prefer variable length types set to true
System.String 256 <= length < 65536 Char(length) Prefer variable length types set to false
System.String 0 < length < 256 TinyText
System.TimeSpan Time

Supported target frameworks

The following target frameworks are supported with MySQL:

  • LLBLGen Pro Runtime Framework
  • Entity Framework v1-v6
  • NHibernate