Log Message:
Update ruby-sequel to 4.5.0.

=== 4.5.0 (2013-12-02)

* Support :on_commit=>(:drop|:delete_rows|:preserve_rows) options when \ 
creating temp tables on PostgreSQL (rosenfeld) (#737)

* Make Dataset#insert work on PostgreSQL if the table name is a \ 
SQL::PlaceholderLiteralString (jeremyevans) (#736)

* Copy unique constraints when emulating alter_table operations on SQLite \ 
(jeremyevans) (#735)

* Don't return clob column values as SQL::Blob instances in the db2 and ibmdb \ 
adapters unless use_clob_as_blob is true (jeremyevans)

* Make use_clob_as_blob false by default on DB2 (jeremyevans)

* Fix usage of Sequel::SQL::Blob objects as prepared statement arguments in \ 
jdbc/db2 adapter when use_clob_as_blob is false (jeremyevans)

* Add mssql_optimistic_locking plugin, using a timestamp/rowversion column to \ 
protect against concurrent updates (pinx, jeremyevans) (#731)

* Make Model.primary_key array immutable for composite keys (chanks) (#730)

=== 4.4.0 (2013-11-01)

* Make Database#tables not show tables in the recycle bin on Oracle \ 
(jeremyevans) (#728)

* Don't automatically order on all columns when emulating offsets for unordered \ 
datasets on DB2 (jeremyevans)

* Improve PostgreSQL type support in the jdbc/postgresql adapter (jeremyevans)

* Make offset emulation on Oracle work when using columns that can't be ordered \ 
(jeremyevans, sdeming) (#724, #725)

* Make filter by associations support handle associations with :conditions or \ 
block (jeremyevans)

* Make association cloning handle :block correctly for clones of clones (jeremyevans)

* Make association cloning handle :eager_block option correctly (jeremyevans)

* Make add_primary_key work on h2 (jeremyevans)

* Add support for foreign key parsing on Oracle (jeremyevans)

* Add support for foreign key parsing to the jdbc adapter (jeremyevans)

* Make add_foreign_key work on HSQLDB (jeremyevans)

* Add table_select plugin for selecting table.* instead of * for model datasets \ 
(jeremyevans)

* Issue constraint_validation table deletes before inserts, so modifying \ 
constraint via drop/add in same alter_table block works (jeremyevans)

* Support add_*/remove_*/remove_all_* pg_array_to_many association methods on \ 
unsaved model objects (jeremyevans)

* Add Sybase SQLAnywhere support via new sqlanywhere and jdbc/sqlanywhere \ 
adapters (gditrick, jeremyevans)

* Add Dataset#offset for setting the offset separately from the limit (Paul \ 
Henry, jeremyevans) (#717)

=== 4.3.0 (2013-10-02)

* Fix literalization of empty blobs on MySQL (jeremyevans) (#715)

* Ensure Dataset#page_count in pagination extension is at least one
  (jeremyevans) (#714)

* Recognize another disconnect error in the jdbc/as400 adapter (jeremyevans)

* Make Dataset#qualify and Sequel.delay work together (jeremyevans)

* Recognize citext type as string on PostgreSQL (isc) (#710)

* Support composite keys in the rcte_tree plugin (jeremyevans)

* Support composite keys in the tree plugin (jeremyevans)

* Make Migrator.migrator_class public (robertjpayne, jeremyevans) (#708)

* Make PostgreSQL empty array literalization work correctly on PostgreSQL <8.4
  (jeremyevans)

* Add Sequel extensions guide (jeremyevans)

* Add model plugins guide (jeremyevans)

* Add error_sql Database extension, allowing DatabaseError#sql to return SQL
  query that caused underlying exception (jeremyevans)

* Make Dataset#each_page in pagination extension return enumerator if no block
  is given (justinj) (#702)