FirebirdDbHelper

This class implements IDbHelper for Firebird. It queries RDB$RELATION_FIELDS/RDB$FIELDS (joined against RDB$RELATION_CONSTRAINTS/RDB$INDEX_SEGMENTS for primary-key detection) to build the list of DbField objects RepoDB uses internally to generate SQL statements, mapping each column’s RDB$FIELD_TYPE/RDB$FIELD_SUB_TYPE/RDB$CHARACTER_SET_ID triple into a canonical type-name string consumed by FirebirdDbTypeNameToClientTypeResolver.

It is automatically registered by FirebirdBootstrap — you do not need to instantiate it directly under normal use.

Properties

Name	Description
DbTypeResolver	The `IResolver<string, Type>` used to convert a Firebird column type name into its equivalent .NET CLR type. Defaults to FirebirdDbTypeNameToClientTypeResolver.

GetScopeIdentity

GetScopeIdentity/GetScopeIdentityAsync always throw NotSupportedException.

Firebird has no session-wide “last identity” construct equivalent to SQL Server’s SCOPE_IDENTITY() or MySQL’s LAST_INSERT_ID() — identity/generator values are scoped per-generator, not per-session. The generated key is already returned directly by Insert/Merge via Firebird’s RETURNING clause; query the underlying generator explicitly (e.g. GEN_ID(generator_name, 0), found in RDB$RELATION_FIELDS.RDB$GENERATOR_NAME) if you need it out-of-band.

Usability

Only override this if you need a custom type resolver.

var dbHelper = new FirebirdDbHelper(new MyCustomFirebirdDbTypeNameToClientTypeResolver());
DbHelperMapper.Add<FbConnection>(dbHelper, true);