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Adding mysql proposed indexing change.

Author: rohit-armorikar

server/src/main/resources/org/cloudfoundry/identity/uaa/db/mysql/V4_113__Add_Index_user_group_membership_groups.sql

@@ -0,0 +1,14 @@
+DROP INDEX IF EXISTS idx_users_zone_id_created ON users;
+ALTER TABLE users ADD INDEX idx_users_zone_id_created (identity_zone_id, created);
+
+DROP INDEX IF EXISTS idx_group_membership_zone_member_group ON group_membership;
+ALTER TABLE group_membership ADD INDEX idx_group_membership_zone_member_group (identity_zone_id, member_id, group_id);
+
+DROP INDEX IF EXISTS idx_group_membership_id_zone_id ON group_membership;
+ALTER TABLE group_membership ADD INDEX idx_group_membership_id_zone_id (group_id, identity_zone_id);
+
+DROP INDEX IF EXISTS idx_groups_zone_id_created ON groups;
+ALTER TABLE groups ADD INDEX idx_groups_zone_id_created (identity_zone_id, created);
+
+DROP INDEX IF EXISTS idx_external_group_zone_id_created ON external_group_mapping;
+ALTER TABLE external_group_mapping ADD INDEX idx_external_group_zone_id_created (group_id, identity_zone_id);