Allow removing column comment on some platforms

Fix ModifyLimitQueryTest

Add length in the OCI8 bindParam

Fix platform create constraint foreign table name quotation

Refactor SQL Server keyword dictionaries and MsSQL leftovers

OraclePlatform sequence naming for primary keys

Add column collation support for SQL Server

Fix SchemaManagerFunctionalTestCase composite foreign keys test

Correcting code example

Change Oracle sequence generation to match what is being created by ORM and other platforms in the form of $table_$column_SQL instead of $table_SEQ