Connection: Replaced ! is_int with is_string

[DBAL-685] Add servicename connection parameter to Oracle drivers

Fix foreign key columns order in Oracle

Fix column default value introspection in Oracle

Fix foreign key propagation on non-supporting MySQL table engines

[DBAL-552] Fix parsing backtick quoted statement fragments in SQLParserUtils

Fix index flags

Intended side effect is not to call extractTypeValues when $types array is empty which it is by default.

[DBAL-726] Fix portability statement parameter binding delegation

[DBAL-593] Add more documentation about vendors and platforms

Introduce BinaryType

[DBAL-44] Fix column default value lifecycle

[DBAL-722] Introduce subclasses for runtime relevant exceptions

[DBAL-544] Fix reference to legacy Query::HYDRATE_* constants in ResultStatement documentation

[DBAL-722] Introduce subclasses for runtime relevant exceptions (NotNull, DuplicateKey, ForeignKey Constraint Violation).

Fix composite primary key introspection on Sqlite

[Mysqli] MYSQLI_SERVER_PUBLIC_KEY only exist for php5.5.0 or creater wit...