Hibernate generates SQL based on Dialect

hibernate Generate according to dialect sql

Create a table statement to generate

SchemaManagementToolCoordinator#performDatabaseAction
This method does some initialization , Such as initializing the table and modifying the table at startup

Table Among objects sqlCreateString Method , However, the table creation statement is generated using StandardTableExporter#getSqlCreateStrings

Resolve column properties

AnnotationBinder#processElementAnnotations
This static method is used to parse class The fields in the class go to Column object

Column type

BasicTypeRegistry registered java Type is used to pass java Type acquisition sql type ,
And by specific dialect#getTypeName according to sql type id obtain sql type string

Dialect selection

StandardDialectResolver#resolveDialect()
Used to detect the current system dialect , The input parameter is the interface DialectResolutionInfo Mainly including database name 、 Main version 、 Small version