Question

When you call DbConnection.GetSchema you give it the string name of a collection you are interested in. I can’t find a list of collections anywhere. Is the list of collections immutable or does it vary by database type (orcle, sql server, etc.)?

I’m interested in getting a list of all collection names in a few database types such as sql server, and sqlite.

Answer 1

I use an OleDbConnection even if I’m connecting with Oracle, Sql Server… Then I can use:

myOleDbConnection.GetOleDbSchemaTable(OleDbSchemGuid.Tables); 

Possible values for OleDbSchemaGuid:
(note that depending of the database some of these can throw a NotSupported Exception:

OleDbSchemaGuid.Assertions; OleDbSchemaGuid.Catalogs; OleDbSchemaGuid.Character_Sets; OleDbSchemaGuid.Check_Constraints; OleDbSchemaGuid.Check_Constraints_By_Table; OleDbSchemaGuid.Collations; OleDbSchemaGuid.Column_Domain_Usage; OleDbSchemaGuid.Column_Privileges; OleDbSchemaGuid.Columns; OleDbSchemaGuid.Constraint_Column_Usage; OleDbSchemaGuid.Constraint_Table_Usage; OleDbSchemaGuid.DbInfoKeywords; OleDbSchemaGuid.DbInfoLiterals; OleDbSchemaGuid.Foreign_Keys; OleDbSchemaGuid.Indexes; OleDbSchemaGuid.Key_Column_Usage; OleDbSchemaGuid.Primary_Keys; OleDbSchemaGuid.Procedure_Columns; OleDbSchemaGuid.Procedure_Parameters; OleDbSchemaGuid.Procedures; OleDbSchemaGuid.Provider_Types; OleDbSchemaGuid.Referential_Constraints; OleDbSchemaGuid.SchemaGuids; OleDbSchemaGuid.Schemata; OleDbSchemaGuid.Sql_Languages; OleDbSchemaGuid.Statistics; OleDbSchemaGuid.Table_Constraints; OleDbSchemaGuid.Table_Privileges; OleDbSchemaGuid.Table_Statistics; OleDbSchemaGuid.Tables; OleDbSchemaGuid.Tables_Info; OleDbSchemaGuid.Translations; OleDbSchemaGuid.Trustee; OleDbSchemaGuid.Usage_Privileges; OleDbSchemaGuid.View_Column_Usage; OleDbSchemaGuid.View_Table_Usage; OleDbSchemaGuid.Views;