Module installation in postgreSQL

I'm on acquia drupal (core 6.8) with PostgreSQL

Error:

When installing the module the following errors occur

# warning: pg_query() [function.pg-query]: Query failed: ERROR: type modifier is not allowed for type "int_unsigned" at character 38 in /path/to/drupal/includes/database.pgsql.inc on line 139.
# user warning: query: CREATE TABLE ac_role_expire_4 ( uid int_unsigned(11) NOT NULL, expiry_timestamp varchar(255) NOT NULL ) in /path/to/drupal/includes/database.inc on line 515.
# warning: pg_query() [function.pg-query]: Query failed: ERROR: relation "ac_role_expire_4" does not exist in /path/to/drupal/includes/database.pgsql.inc on line 139.
# user warning: query: CREATE INDEX ac_role_expire_4_uid_idx ON ac_role_expire_4 (uid) in /path/to/drupal/includes/database.inc on line 515.
# warning: pg_query() [function.pg-query]: Query failed: ERROR: type modifier is not allowed for type "int_unsigned" at character 38 in /path/to/drupal/includes/database.pgsql.inc on line 139.
# user warning: query: CREATE TABLE ac_role_expire_3 ( uid int_unsigned(11) NOT NULL, expiry_timestamp varchar(255) NOT NULL ) in /path/to/drupal/includes/database.inc on line 515.
# warning: pg_query() [function.pg-query]: Query failed: ERROR: relation "ac_role_expire_3" does not exist in /path/to/drupal/includes/database.pgsql.inc on line 139.
# user warning: query: CREATE INDEX ac_role_expire_3_uid_idx ON ac_role_expire_3 (uid) in /path/to/drupal/includes/database.inc on line 515.
# warning: pg_query() [function.pg-query]: Query failed: ERROR: type modifier is not allowed for type "int_unsigned" at character 38 in /path/to/drupal/includes/database.pgsql.inc on line 139.
# user warning: query: CREATE TABLE ac_role_expire_5 ( uid int_unsigned(11) NOT NULL, expiry_timestamp varchar(255) NOT NULL ) in /path/to/drupal/includes/database.inc on line 515.
# warning: pg_query() [function.pg-query]: Query failed: ERROR: relation "ac_role_expire_5" does not exist in /path/to/drupal/includes/database.pgsql.inc on line 139.
# user warning: query: CREATE INDEX ac_role_expire_5_uid_idx ON ac_role_expire_5 (uid) in /path/to/drupal/includes/database.inc on line 515.

Solution:

role_expire.install line 24
comment out // 'length' => 11,

role_expire.install line 70
comment out // 'length' => 11,

Reason is that unsigned int data type in postgreSQL does not allow type modifier to specify length.

It would still work in mySQL