diff --git a/contrib/ast-db-manage/config/env.py b/contrib/ast-db-manage/config/env.py
index 6740d5906d532e5b34fc3f9dae80641289ff5f7f..4118da06681656eaa28c662730af023b6390df6c 100755
--- a/contrib/ast-db-manage/config/env.py
+++ b/contrib/ast-db-manage/config/env.py
@@ -58,7 +58,8 @@ def run_migrations_online():
     connection = engine.connect()
     context.configure(
                 connection=connection,
-                target_metadata=target_metadata
+                target_metadata=target_metadata,
+                render_as_batch=True
                 )
 
     try:
diff --git a/contrib/ast-db-manage/config/versions/10aedae86a32_add_outgoing_enum_va.py b/contrib/ast-db-manage/config/versions/10aedae86a32_add_outgoing_enum_va.py
index b4ea71cbd01406eac52206e387f5830002b3b9ac..cc9f0e0cc1d2e02247411f71222bab538424c418 100755
--- a/contrib/ast-db-manage/config/versions/10aedae86a32_add_outgoing_enum_va.py
+++ b/contrib/ast-db-manage/config/versions/10aedae86a32_add_outgoing_enum_va.py
@@ -45,7 +45,10 @@ def upgrade():
     context = op.get_context()
 
     # Upgrading to this revision WILL clear your directmedia values.
-    if context.bind.dialect.name != 'postgresql':
+    if context.bind.dialect.name == 'sqlite':
+        with op.batch_alter_table('sippeers') as batch_op:
+            batch_op.alter_column('directmedia', type_=new_type)
+    elif context.bind.dialect.name != 'postgresql':
         op.alter_column('sippeers', 'directmedia',
                         type_=new_type,
                         existing_type=old_type)
@@ -66,7 +69,10 @@ def downgrade():
     op.execute(tcr.update().where(tcr.c.directmedia==u'outgoing')
                .values(directmedia=None))
 
-    if context.bind.dialect.name != 'postgresql':
+    if context.bind.dialect.name == 'sqlite':
+        with op.batch_alter_table('sippeers') as batch_op:
+            batch_op.alter_column('directmedia', type_=old_type)
+    elif context.bind.dialect.name != 'postgresql':
         op.alter_column('sippeers', 'directmedia',
                         type_=old_type,
                         existing_type=new_type)
diff --git a/contrib/ast-db-manage/config/versions/136885b81223_add_regcontext_to_pj.py b/contrib/ast-db-manage/config/versions/136885b81223_add_regcontext_to_pj.py
index 724a5e57695296f44528761ef08e1bb25af09f89..22fd6c7b740b60af8e8fe58502bae4d9206aa43b 100644
--- a/contrib/ast-db-manage/config/versions/136885b81223_add_regcontext_to_pj.py
+++ b/contrib/ast-db-manage/config/versions/136885b81223_add_regcontext_to_pj.py
@@ -17,4 +17,5 @@ def upgrade():
     op.add_column('ps_globals', sa.Column('regcontext', sa.String(80)))
 
 def downgrade():
-    op.drop_column('ps_globals', 'regcontext')
+    with op.batch_alter_table('ps_globals') as batch_op:
+        batch_op.drop_column('regcontext')
diff --git a/contrib/ast-db-manage/config/versions/154177371065_add_default_from_user.py b/contrib/ast-db-manage/config/versions/154177371065_add_default_from_user.py
index 7e6cf994f6162cd53e2457cabfc232d1ed25d119..6c5f808bba7535f60985ceb4993401c62a4b8c10 100644
--- a/contrib/ast-db-manage/config/versions/154177371065_add_default_from_user.py
+++ b/contrib/ast-db-manage/config/versions/154177371065_add_default_from_user.py
@@ -19,4 +19,5 @@ def upgrade():
 
 
 def downgrade():
-    op.drop_column('ps_globals', 'default_from_user')
+    with op.batch_alter_table('ps_globals') as batch_op:
+        batch_op.drop_column('default_from_user')
diff --git a/contrib/ast-db-manage/config/versions/15b1430ad6f1_add_moh_passthrough_option_to_pjsip.py b/contrib/ast-db-manage/config/versions/15b1430ad6f1_add_moh_passthrough_option_to_pjsip.py
index 54f08ff0b62b0448a4ca0158c707ed0f50a0925e..725238cab17bca65928039084c2bb44f830f5119 100644
--- a/contrib/ast-db-manage/config/versions/15b1430ad6f1_add_moh_passthrough_option_to_pjsip.py
+++ b/contrib/ast-db-manage/config/versions/15b1430ad6f1_add_moh_passthrough_option_to_pjsip.py
@@ -27,4 +27,5 @@ def upgrade():
     op.add_column('ps_endpoints', sa.Column('moh_passthrough', yesno_values))
 
 def downgrade():
-    op.drop_column('ps_endpoints', 'moh_passthrough')
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.drop_column('moh_passthrough')
diff --git a/contrib/ast-db-manage/config/versions/1758e8bbf6b_increase_useragent_column_size.py b/contrib/ast-db-manage/config/versions/1758e8bbf6b_increase_useragent_column_size.py
index 215726fa059b6a24cf18cdef659135025af07cc3..c16cff9f4a8361c12168dbec02544cb55f5dbb9c 100755
--- a/contrib/ast-db-manage/config/versions/1758e8bbf6b_increase_useragent_column_size.py
+++ b/contrib/ast-db-manage/config/versions/1758e8bbf6b_increase_useragent_column_size.py
@@ -33,9 +33,11 @@ import sqlalchemy as sa
 
 
 def upgrade():
-    op.alter_column('sippeers', 'useragent', type_=sa.String(255))
+    with op.batch_alter_table('sippeers') as batch_op:
+        batch_op.alter_column('useragent', type_=sa.String(255))
 
 
 def downgrade():
-    op.alter_column('sippeers', 'useragent', type_=sa.String(20))
+    with op.batch_alter_table('sippeers') as batch_op:
+        batch_op.alter_column('useragent', type_=sa.String(20))
 
diff --git a/contrib/ast-db-manage/config/versions/189a235b3fd7_add_keep_alive_interval.py b/contrib/ast-db-manage/config/versions/189a235b3fd7_add_keep_alive_interval.py
index ba972b64ed6e081eaf996d87931f919d636a9988..dee384d4c30a1bc78c3e90c2a721e0dc94355300 100644
--- a/contrib/ast-db-manage/config/versions/189a235b3fd7_add_keep_alive_interval.py
+++ b/contrib/ast-db-manage/config/versions/189a235b3fd7_add_keep_alive_interval.py
@@ -19,4 +19,5 @@ def upgrade():
 
 
 def downgrade():
-    op.drop_column('ps_globals', 'keep_alive_interval')
+    with op.batch_alter_table('ps_globals') as batch_op:
+        batch_op.drop_column('keep_alive_interval')
diff --git a/contrib/ast-db-manage/config/versions/1d50859ed02e_create_accountcode.py b/contrib/ast-db-manage/config/versions/1d50859ed02e_create_accountcode.py
index eb200013788e1ee851e73a84b8cc38aae4dbcd78..4d520fcee6c38b57e9cbebb4e81a939dbd9595c4 100644
--- a/contrib/ast-db-manage/config/versions/1d50859ed02e_create_accountcode.py
+++ b/contrib/ast-db-manage/config/versions/1d50859ed02e_create_accountcode.py
@@ -17,4 +17,5 @@ def upgrade():
     op.add_column('ps_endpoints', sa.Column('accountcode', sa.String(20)))
 
 def downgrade():
-    op.drop_column('ps_endpoints', 'accountcode')
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.drop_column('accountcode')
diff --git a/contrib/ast-db-manage/config/versions/21e526ad3040_add_pjsip_debug_option.py b/contrib/ast-db-manage/config/versions/21e526ad3040_add_pjsip_debug_option.py
index 2adca628b51b18fa2e14c8c7e624ed263a99d927..8b77eb7ac619d133f3fc765aaf605515f664404c 100755
--- a/contrib/ast-db-manage/config/versions/21e526ad3040_add_pjsip_debug_option.py
+++ b/contrib/ast-db-manage/config/versions/21e526ad3040_add_pjsip_debug_option.py
@@ -18,4 +18,5 @@ def upgrade():
     op.add_column('ps_globals', sa.Column('debug', sa.String(40)))
 
 def downgrade():
-    op.drop_column('ps_globals', 'debug')
+    with op.batch_alter_table('ps_globals') as batch_op:
+        batch_op.drop_column('debug')
diff --git a/contrib/ast-db-manage/config/versions/23530d604b96_add_rpid_immediate.py b/contrib/ast-db-manage/config/versions/23530d604b96_add_rpid_immediate.py
index dc0c01c24c3048b5ddbc775c5efb912e70a16fe8..8ca63f1487c1f9f3bb9e04a9499786019a8a792c 100755
--- a/contrib/ast-db-manage/config/versions/23530d604b96_add_rpid_immediate.py
+++ b/contrib/ast-db-manage/config/versions/23530d604b96_add_rpid_immediate.py
@@ -45,4 +45,5 @@ def upgrade():
     op.add_column('ps_endpoints', sa.Column('rpid_immediate', yesno_values))
 
 def downgrade():
-    op.drop_column('ps_endpoints', 'rpid_immediate')
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.drop_column('rpid_immediate')
diff --git a/contrib/ast-db-manage/config/versions/26d7f3bf0fa5_add_bind_rtp_to_media_address_to_pjsip.py b/contrib/ast-db-manage/config/versions/26d7f3bf0fa5_add_bind_rtp_to_media_address_to_pjsip.py
index e7c11da19259133cc38cd5b5eddca1d489078243..1199d0c8380edc844ff46940a04e329705343cb6 100644
--- a/contrib/ast-db-manage/config/versions/26d7f3bf0fa5_add_bind_rtp_to_media_address_to_pjsip.py
+++ b/contrib/ast-db-manage/config/versions/26d7f3bf0fa5_add_bind_rtp_to_media_address_to_pjsip.py
@@ -28,4 +28,5 @@ def upgrade():
 
 
 def downgrade():
-    op.drop_column('ps_endpoints', 'bind_rtp_to_media_address')
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.drop_column('bind_rtp_to_media_address')
diff --git a/contrib/ast-db-manage/config/versions/26f10cadc157_add_pjsip_timeout_options.py b/contrib/ast-db-manage/config/versions/26f10cadc157_add_pjsip_timeout_options.py
index 8972d80302aa5a0424bd6fa7b411f89882d61164..2a792d3f1e91631b3f1b5f30da2f9e59dfbc27a0 100644
--- a/contrib/ast-db-manage/config/versions/26f10cadc157_add_pjsip_timeout_options.py
+++ b/contrib/ast-db-manage/config/versions/26f10cadc157_add_pjsip_timeout_options.py
@@ -20,5 +20,6 @@ def upgrade():
 
 
 def downgrade():
-    op.drop_column('ps_endpoints', 'rtp_timeout')
-    op.drop_column('ps_endpoints', 'rtp_timeout_hold')
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.drop_column('rtp_timeout')
+        batch_op.drop_column('rtp_timeout_hold')
diff --git a/contrib/ast-db-manage/config/versions/28b8e71e541f_add_g726_non_standard.py b/contrib/ast-db-manage/config/versions/28b8e71e541f_add_g726_non_standard.py
index ad36bd9b7cd3c3b87271caf34532a8ba03687832..09056d6c40872190fd784b5b57f4a6114753eb2d 100644
--- a/contrib/ast-db-manage/config/versions/28b8e71e541f_add_g726_non_standard.py
+++ b/contrib/ast-db-manage/config/versions/28b8e71e541f_add_g726_non_standard.py
@@ -27,4 +27,5 @@ def upgrade():
 
 
 def downgrade():
-    op.drop_column('ps_endpoints', 'g726_non_standard')
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.drop_column('g726_non_standard')
diff --git a/contrib/ast-db-manage/config/versions/28ce1e718f05_add_fatal_response_interval.py b/contrib/ast-db-manage/config/versions/28ce1e718f05_add_fatal_response_interval.py
index 8c499aee8c250f1ef41213228c2cf352fa1ec13d..8e05a62a4c2e07e0315c1cc56ddd256c55e7b5f7 100644
--- a/contrib/ast-db-manage/config/versions/28ce1e718f05_add_fatal_response_interval.py
+++ b/contrib/ast-db-manage/config/versions/28ce1e718f05_add_fatal_response_interval.py
@@ -19,4 +19,5 @@ def upgrade():
 
 
 def downgrade():
-    op.drop_column('ps_registrations', 'fatal_retry_interval')
+    with op.batch_alter_table('ps_registrations') as batch_op:
+        batch_op.drop_column('fatal_retry_interval')
diff --git a/contrib/ast-db-manage/config/versions/2d078ec071b7_increaes_contact_column_size.py b/contrib/ast-db-manage/config/versions/2d078ec071b7_increaes_contact_column_size.py
index 2ade86f9f3de842a55fe200923b1186655e619e6..9f98750f615323ec41474c108ecaf5ee2509f7c2 100644
--- a/contrib/ast-db-manage/config/versions/2d078ec071b7_increaes_contact_column_size.py
+++ b/contrib/ast-db-manage/config/versions/2d078ec071b7_increaes_contact_column_size.py
@@ -15,8 +15,10 @@ import sqlalchemy as sa
 
 
 def upgrade():
-    op.alter_column('ps_aors', 'contact', type_=sa.String(255))
+    with op.batch_alter_table('ps_aors') as batch_op:
+        batch_op.alter_column('contact', type_=sa.String(255))
 
 
 def downgrade():
-    op.alter_column('ps_aors', 'contact', type_=sa.String(40))
+    with op.batch_alter_table('ps_aors') as batch_op:
+        batch_op.alter_column('contact', type_=sa.String(40))
diff --git a/contrib/ast-db-manage/config/versions/2fc7930b41b3_add_pjsip_endpoint_options_for_12_1.py b/contrib/ast-db-manage/config/versions/2fc7930b41b3_add_pjsip_endpoint_options_for_12_1.py
index 564897e8649747dbd3ec36d925440c4211f9795c..102265ea84ac3b608ad48202263def6a3f35d5cc 100755
--- a/contrib/ast-db-manage/config/versions/2fc7930b41b3_add_pjsip_endpoint_options_for_12_1.py
+++ b/contrib/ast-db-manage/config/versions/2fc7930b41b3_add_pjsip_endpoint_options_for_12_1.py
@@ -120,15 +120,15 @@ def upgrade():
     op.create_index('ps_registrations_id', 'ps_registrations', ['id'])
 
     ########################## add columns ###########################
-
+    with op.batch_alter_table('ps_endpoints') as batch_op:
     # new columns for endpoints
-    op.add_column('ps_endpoints', sa.Column('media_address', sa.String(40)))
-    op.add_column('ps_endpoints', sa.Column('redirect_method',
+        batch_op.add_column(sa.Column('media_address', sa.String(40)))
+        batch_op.add_column(sa.Column('redirect_method',
                                             pjsip_redirect_method_values))
-    op.add_column('ps_endpoints', sa.Column('set_var', sa.Text()))
+        batch_op.add_column(sa.Column('set_var', sa.Text()))
 
     # rename mwi_fromuser to mwi_from_user
-    op.alter_column('ps_endpoints', 'mwi_fromuser',
+        batch_op.alter_column('mwi_fromuser',
                     new_column_name='mwi_from_user',
                     existing_type=sa.String(40))
 
@@ -144,20 +144,23 @@ def upgrade():
 def downgrade():
     ########################## drop columns ##########################
 
-    op.drop_column('ps_aors', 'support_path')
-    op.drop_column('ps_aors', 'outbound_proxy')
-    op.drop_column('ps_aors', 'maximum_expiration')
+    with op.batch_alter_table('ps_aors') as batch_op:
+        batch_op.drop_column('support_path')
+        batch_op.drop_column('outbound_proxy')
+        batch_op.drop_column('maximum_expiration')
 
-    op.drop_column('ps_contacts', 'path')
-    op.drop_column('ps_contacts', 'outbound_proxy')
+    with op.batch_alter_table('ps_contacts') as batch_op:
+        batch_op.drop_column('path')
+        batch_op.drop_column('outbound_proxy')
 
-    op.alter_column('ps_endpoints', 'mwi_from_user',
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.alter_column('mwi_from_user',
                     new_column_name='mwi_fromuser',
                     existing_type=sa.String(40))
 
-    op.drop_column('ps_endpoints', 'set_var')
-    op.drop_column('ps_endpoints', 'redirect_method')
-    op.drop_column('ps_endpoints', 'media_address')
+        batch_op.drop_column('set_var')
+        batch_op.drop_column('redirect_method')
+        batch_op.drop_column('media_address')
 
     ########################## drop tables ###########################
 
diff --git a/contrib/ast-db-manage/config/versions/31cd4f4891ec_add_auto_dtmf_mode.py b/contrib/ast-db-manage/config/versions/31cd4f4891ec_add_auto_dtmf_mode.py
index 0d84390b29ce9d52cbdb4f5d4161b1f49e6f5afb..b1a9f8be8edda701f61d9adbca2ec7c7aa75c3f7 100644
--- a/contrib/ast-db-manage/config/versions/31cd4f4891ec_add_auto_dtmf_mode.py
+++ b/contrib/ast-db-manage/config/versions/31cd4f4891ec_add_auto_dtmf_mode.py
@@ -20,14 +20,14 @@ NEW_ENUM = ['rfc4733', 'inband', 'info', 'auto']
 old_type = sa.Enum(*OLD_ENUM, name='pjsip_dtmf_mode_values')
 new_type = sa.Enum(*NEW_ENUM, name='pjsip_dtmf_mode_values_v2')
 
-tcr = sa.sql.table('ps_endpoints', sa.Column('dtmf_mode', new_type,
-                   nullable=True))
-
 def upgrade():
     context = op.get_context()
 
     # Upgrading to this revision WILL clear your directmedia values.
-    if context.bind.dialect.name != 'postgresql':
+    if context.bind.dialect.name == 'sqlite':
+        with op.batch_alter_table('ps_endpoints') as batch_op:
+            batch_op.alter_column('dtmf_mode', type_=new_type)
+    elif context.bind.dialect.name != 'postgresql':
         op.alter_column('ps_endpoints', 'dtmf_mode',
                         type_=new_type,
                         existing_type=old_type)
@@ -45,10 +45,10 @@ def upgrade():
 def downgrade():
     context = op.get_context()
 
-    op.execute(tcr.update().where(tcr.c.directmedia==u'outgoing')
-               .values(directmedia=None))
-
-    if context.bind.dialect.name != 'postgresql':
+    if context.bind.dialect.name == 'sqlite':
+        with op.batch_alter_table('ps_endpoints') as batch_op:
+            batch_op.alter_column('dtmf_mode', type_=old_type)
+    elif context.bind.dialect.name != 'postgresql':
         op.alter_column('ps_endpoints', 'dtmf_mode',
                         type_=old_type,
                         existing_type=new_type)
diff --git a/contrib/ast-db-manage/config/versions/339a3bdf53fc_expand_accountcode_to_80.py b/contrib/ast-db-manage/config/versions/339a3bdf53fc_expand_accountcode_to_80.py
index 31889c66bbbc02c7545917209e5668f7f3da315f..48911525992f9edacc965c83d9da168cce1731d4 100644
--- a/contrib/ast-db-manage/config/versions/339a3bdf53fc_expand_accountcode_to_80.py
+++ b/contrib/ast-db-manage/config/versions/339a3bdf53fc_expand_accountcode_to_80.py
@@ -15,14 +15,20 @@ import sqlalchemy as sa
 
 
 def upgrade():
-    op.alter_column('ps_endpoints', 'accountcode', type_=sa.String(80))
-    op.alter_column('sippeers', 'accountcode', type_=sa.String(80))
-    op.alter_column('iaxfriends', 'accountcode', type_=sa.String(80))
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.alter_column('accountcode', type_=sa.String(80))
+    with op.batch_alter_table('sippeers') as batch_op:
+        batch_op.alter_column('accountcode', type_=sa.String(80))
+    with op.batch_alter_table('iaxfriends') as batch_op:
+        batch_op.alter_column('accountcode', type_=sa.String(80))
     pass
 
 
 def downgrade():
-    op.alter_column('ps_endpoints', 'accountcode', type_=sa.String(20))
-    op.alter_column('sippeers', 'accountcode', type_=sa.String(40))
-    op.alter_column('iaxfriends', 'accountcode', type_=sa.String(20))
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.alter_column('accountcode', type_=sa.String(20))
+    with op.batch_alter_table('sippeers') as batch_op:
+        batch_op.alter_column('accountcode', type_=sa.String(40))
+    with op.batch_alter_table('iaxfriends') as batch_op:
+        batch_op.alter_column('accountcode', type_=sa.String(20))
     pass
diff --git a/contrib/ast-db-manage/config/versions/371a3bf4143e_add_user_eq_phone_option_to_pjsip.py b/contrib/ast-db-manage/config/versions/371a3bf4143e_add_user_eq_phone_option_to_pjsip.py
index 145d6bea6520d9ffefad571df103c57a3b041a4b..5de7aa862be18bb61ee3c8bfda3913f03f66f4f8 100644
--- a/contrib/ast-db-manage/config/versions/371a3bf4143e_add_user_eq_phone_option_to_pjsip.py
+++ b/contrib/ast-db-manage/config/versions/371a3bf4143e_add_user_eq_phone_option_to_pjsip.py
@@ -27,4 +27,5 @@ def upgrade():
     op.add_column('ps_endpoints', sa.Column('user_eq_phone', yesno_values))
 
 def downgrade():
-    op.drop_column('ps_endpoints', 'user_eq_phone')
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.drop_column('user_eq_phone')
diff --git a/contrib/ast-db-manage/config/versions/3855ee4e5f85_add_missing_pjsip_options.py b/contrib/ast-db-manage/config/versions/3855ee4e5f85_add_missing_pjsip_options.py
index afc1beb3775ffaf2bf67705331e92758f2dd28cb..08457a9d8c6b3afcc218f8ae14c81b027a88f835 100644
--- a/contrib/ast-db-manage/config/versions/3855ee4e5f85_add_missing_pjsip_options.py
+++ b/contrib/ast-db-manage/config/versions/3855ee4e5f85_add_missing_pjsip_options.py
@@ -20,5 +20,7 @@ def upgrade():
 
 
 def downgrade():
-    op.drop_column('ps_contacts', 'user_agent')
-    op.drop_column('ps_endpoints', 'message_context')
+    with op.batch_alter_table('ps_contacts') as batch_op:
+        batch_op.drop_column('user_agent')
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.drop_column('message_context')
diff --git a/contrib/ast-db-manage/config/versions/3bcc0b5bc2c9_add_allow_reload_to_ps_transports.py b/contrib/ast-db-manage/config/versions/3bcc0b5bc2c9_add_allow_reload_to_ps_transports.py
index 377179b045de4eaf66343a20854c8b1171b24d38..7f2c57978554face1cdbb35901a9aabc5f7fc223 100644
--- a/contrib/ast-db-manage/config/versions/3bcc0b5bc2c9_add_allow_reload_to_ps_transports.py
+++ b/contrib/ast-db-manage/config/versions/3bcc0b5bc2c9_add_allow_reload_to_ps_transports.py
@@ -20,8 +20,7 @@ YESNO_VALUES = ['yes', 'no']
 def upgrade():
     yesno_values = ENUM(*YESNO_VALUES, name=YESNO_NAME, create_type=False)
     op.add_column('ps_transports', sa.Column('allow_reload', yesno_values))
-    pass
 
 def downgrade():
-    op.drop_column('ps_transports', 'allow_reload')
-    pass
+    with op.batch_alter_table('ps_transports') as batch_op:
+        batch_op.drop_column('allow_reload')
diff --git a/contrib/ast-db-manage/config/versions/423f34ad36e2_fix_pjsip_qualify_ti.py b/contrib/ast-db-manage/config/versions/423f34ad36e2_fix_pjsip_qualify_ti.py
index cda0b9af570091238b0fe58a22279409670a01d4..563b98d08a9357d7e1e8a38202ac85086ef7d960 100644
--- a/contrib/ast-db-manage/config/versions/423f34ad36e2_fix_pjsip_qualify_ti.py
+++ b/contrib/ast-db-manage/config/versions/423f34ad36e2_fix_pjsip_qualify_ti.py
@@ -15,12 +15,13 @@ import sqlalchemy as sa
 
 
 def upgrade():
-    op.alter_column('ps_aors', 'qualify_timeout', type_=sa.Float)
-    op.alter_column('ps_contacts', 'qualify_timeout', type_=sa.Float)
-    pass
-
+    with op.batch_alter_table('ps_aors') as batch_op:
+        batch_op.alter_column('qualify_timeout', type_=sa.Float)
+    with op.batch_alter_table('ps_contacts') as batch_op:
+        batch_op.alter_column('qualify_timeout', type_=sa.Float)
 
 def downgrade():
-    op.alter_column('ps_aors', 'qualify_timeout', type_=sa.Integer)
-    op.alter_column('ps_contacts', 'qualify_timeout', type_=sa.Integer)
-    pass
+    with op.batch_alter_table('ps_aors') as batch_op:
+        batch_op.alter_column('qualify_timeout', type_=sa.Integer)
+    with op.batch_alter_table('ps_contacts') as batch_op:
+        batch_op.alter_column('qualify_timeout', type_=sa.Integer)
diff --git a/contrib/ast-db-manage/config/versions/43956d550a44_add_tables_for_pjsip.py b/contrib/ast-db-manage/config/versions/43956d550a44_add_tables_for_pjsip.py
index 0c4d9c8f80af85a2b03fac14563348df925474eb..140fe5b93f22dd972c4635ad68c5abe75ec43514 100755
--- a/contrib/ast-db-manage/config/versions/43956d550a44_add_tables_for_pjsip.py
+++ b/contrib/ast-db-manage/config/versions/43956d550a44_add_tables_for_pjsip.py
@@ -12,6 +12,7 @@ down_revision = '4da0c5f79a9c'
 
 from alembic import op
 import sqlalchemy as sa
+from sqlalchemy.dialects.postgresql import ENUM
 
 
 YESNO_VALUES = ['yes', 'no']
@@ -181,9 +182,21 @@ def upgrade():
 
 
 def downgrade():
+    context = op.get_context()
+
     op.drop_table('ps_endpoints')
     op.drop_table('ps_auths')
     op.drop_table('ps_aors')
     op.drop_table('ps_contacts')
     op.drop_table('ps_domain_aliases')
     op.drop_table('ps_endpoint_id_ips')
+
+    enums = ['yesno_values',
+             'pjsip_100rel_values','pjsip_auth_type_values','pjsip_cid_privacy_values',
+             'pjsip_connected_line_method_values','pjsip_direct_media_glare_mitigation_values',
+             'pjsip_dtls_setup_values','pjsip_dtmf_mode_values','pjsip_identify_by_values',
+             'pjsip_media_encryption_values','pjsip_t38udptl_ec_values','pjsip_timer_values']
+
+    if context.bind.dialect.name == 'postgresql':
+        for e in enums:
+            ENUM(name=e).drop(op.get_bind(), checkfirst=False)
diff --git a/contrib/ast-db-manage/config/versions/45e3f47c6c44_add_pjsip_endpoint_identifier_order.py b/contrib/ast-db-manage/config/versions/45e3f47c6c44_add_pjsip_endpoint_identifier_order.py
index b7d99249325b97cb90641cede48755d5ffb1ca2a..b09acf7a3f7f122836bf894229af577e37f89021 100644
--- a/contrib/ast-db-manage/config/versions/45e3f47c6c44_add_pjsip_endpoint_identifier_order.py
+++ b/contrib/ast-db-manage/config/versions/45e3f47c6c44_add_pjsip_endpoint_identifier_order.py
@@ -18,4 +18,5 @@ def upgrade():
     op.add_column('ps_globals', sa.Column('endpoint_identifier_order', sa.String(40)))
 
 def downgrade():
-    op.drop_column('ps_globals', 'endpoint_identifier_order')
+    with op.batch_alter_table('ps_globals') as batch_op:
+        batch_op.drop_column('endpoint_identifier_order')
diff --git a/contrib/ast-db-manage/config/versions/461d7d691209_add_pjsip_qualify_timeout.py b/contrib/ast-db-manage/config/versions/461d7d691209_add_pjsip_qualify_timeout.py
index 9600c04611b1934e9c6f5d31b47be81f22f6f5dd..ec8a90449fb04fddd2255527a983ea92843a376c 100644
--- a/contrib/ast-db-manage/config/versions/461d7d691209_add_pjsip_qualify_timeout.py
+++ b/contrib/ast-db-manage/config/versions/461d7d691209_add_pjsip_qualify_timeout.py
@@ -16,10 +16,9 @@ import sqlalchemy as sa
 def upgrade():
     op.add_column('ps_aors', sa.Column('qualify_timeout', sa.Integer))
     op.add_column('ps_contacts', sa.Column('qualify_timeout', sa.Integer))
-    pass
-
 
 def downgrade():
-    op.drop_column('ps_aors', 'qualify_timeout')
-    op.drop_column('ps_contacts', 'qualify_timeout')
-    pass
+    with op.batch_alter_table('ps_aors') as batch_op:
+        batch_op.drop_column('qualify_timeout')
+    with op.batch_alter_table('ps_contacts') as batch_op:
+        batch_op.drop_column('qualify_timeout')
diff --git a/contrib/ast-db-manage/config/versions/498357a710ae_add_rtp_keepalive.py b/contrib/ast-db-manage/config/versions/498357a710ae_add_rtp_keepalive.py
index 5a4f470aad0a8f435a07aa2894ab5f8bfb6dc4d4..3ad26509b25354c9713b357ca1791b101e619272 100644
--- a/contrib/ast-db-manage/config/versions/498357a710ae_add_rtp_keepalive.py
+++ b/contrib/ast-db-manage/config/versions/498357a710ae_add_rtp_keepalive.py
@@ -19,4 +19,5 @@ def upgrade():
 
 
 def downgrade():
-    op.drop_column('ps_endpoints', 'rtp_keepalive')
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.drop_column('rtp_keepalive')
diff --git a/contrib/ast-db-manage/config/versions/4c573e7135bd_fix_tos_field_types.py b/contrib/ast-db-manage/config/versions/4c573e7135bd_fix_tos_field_types.py
index aefddd12eb100671ce68a55a74f6e07472f07873..d9bbf8977dff7c851ab828760fcf159459e5d449 100755
--- a/contrib/ast-db-manage/config/versions/4c573e7135bd_fix_tos_field_types.py
+++ b/contrib/ast-db-manage/config/versions/4c573e7135bd_fix_tos_field_types.py
@@ -19,43 +19,43 @@ YESNO_NAME = 'yesno_values'
 YESNO_VALUES = ['yes', 'no']
 
 def upgrade():
-    op.alter_column('ps_endpoints', 'tos_audio',
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.alter_column('tos_audio',
                     type_=sa.String(10))
-    op.alter_column('ps_endpoints', 'tos_video',
+        batch_op.alter_column('tos_video',
                     type_=sa.String(10))
-    op.alter_column('ps_transports', 'tos',
+        batch_op.drop_column('cos_audio')
+        batch_op.drop_column('cos_video')
+        batch_op.add_column(sa.Column('cos_audio', sa.Integer))
+        batch_op.add_column(sa.Column('cos_video', sa.Integer))
+
+    with op.batch_alter_table('ps_transports') as batch_op:
+        batch_op.alter_column('tos',
                     type_=sa.String(10))
 
     # Can't cast YENO_VALUES to Integers, so dropping and adding is required
-    op.drop_column('ps_endpoints', 'cos_audio')
-    op.drop_column('ps_endpoints', 'cos_video')
-    op.drop_column('ps_transports', 'cos')
-
-    op.add_column('ps_endpoints', sa.Column('cos_audio', sa.Integer))
-    op.add_column('ps_endpoints', sa.Column('cos_video', sa.Integer))
-    op.add_column('ps_transports', sa.Column('cos', sa.Integer))
-    pass
+        batch_op.drop_column('cos')
 
+        batch_op.add_column(sa.Column('cos', sa.Integer))
 
 def downgrade():
 
     yesno_values = ENUM(*YESNO_VALUES, name=YESNO_NAME, create_type=False)
 
     # Can't cast string to YESNO_VALUES, so dropping and adding is required
-    op.drop_column('ps_endpoints', 'tos_audio')
-    op.drop_column('ps_endpoints', 'tos_video')
-    op.drop_column('ps_transports', 'tos')
-
-    op.add_column('ps_endpoints', sa.Column('tos_audio', yesno_values))
-    op.add_column('ps_endpoints', sa.Column('tos_video', yesno_values))
-    op.add_column('ps_transports', sa.Column('tos', yesno_values))
-
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.drop_column('tos_audio')
+        batch_op.drop_column('tos_video')
+        batch_op.add_column(sa.Column('tos_audio', yesno_values))
+        batch_op.add_column(sa.Column('tos_video', yesno_values))
+        batch_op.drop_column('cos_audio')
+        batch_op.drop_column('cos_video')
+        batch_op.add_column(sa.Column('cos_audio', yesno_values))
+        batch_op.add_column(sa.Column('cos_video', yesno_values))
+
+    with op.batch_alter_table('ps_transports') as batch_op:
+        batch_op.drop_column('tos')
+        batch_op.add_column(sa.Column('tos', yesno_values))
     # Can't cast integers to YESNO_VALUES, so dropping and adding is required
-    op.drop_column('ps_endpoints', 'cos_audio')
-    op.drop_column('ps_endpoints', 'cos_video')
-    op.drop_column('ps_transports', 'cos')
-
-    op.add_column('ps_endpoints', sa.Column('cos_audio', yesno_values))
-    op.add_column('ps_endpoints', sa.Column('cos_video', yesno_values))
-    op.add_column('ps_transports', sa.Column('cos', yesno_values))
-    pass
+        batch_op.drop_column('cos')
+        batch_op.add_column(sa.Column('cos', yesno_values))
diff --git a/contrib/ast-db-manage/config/versions/4da0c5f79a9c_create_tables.py b/contrib/ast-db-manage/config/versions/4da0c5f79a9c_create_tables.py
index ffaff9295c49f5a43c5e1206f948dc13ff1bf777..01c40acbc105e1b988a5e9523ede1b9fb248e00d 100755
--- a/contrib/ast-db-manage/config/versions/4da0c5f79a9c_create_tables.py
+++ b/contrib/ast-db-manage/config/versions/4da0c5f79a9c_create_tables.py
@@ -30,7 +30,7 @@ down_revision = None
 
 from alembic import op
 import sqlalchemy as sa
-
+from sqlalchemy.dialects.postgresql import ENUM
 
 YESNO_VALUES = ['yes', 'no']
 TYPE_VALUES = ['friend', 'user', 'peer']
@@ -323,8 +323,20 @@ def upgrade():
 
 
 def downgrade():
+    context = op.get_context()
+
     op.drop_table('sippeers')
     op.drop_table('iaxfriends')
     op.drop_table('voicemail')
     op.drop_table('meetme')
     op.drop_table('musiconhold')
+
+    enums = ['type_values', 'yes_no_values',
+             'sip_transport_values','sip_dtmfmode_values','sip_directmedia_values',
+             'sip_progressinband_values','sip_session_timers_values','sip_session_refresher_values',
+             'sip_callingpres_values','iax_requirecalltoken_values','iax_encryption_values',
+             'iax_transfer_values','moh_mode_values']
+
+    if context.bind.dialect.name == 'postgresql':
+        for e in enums:
+            ENUM(name=e).drop(op.get_bind(), checkfirst=False)
diff --git a/contrib/ast-db-manage/config/versions/5139253c0423_make_q_member_uniqueid_autoinc.py b/contrib/ast-db-manage/config/versions/5139253c0423_make_q_member_uniqueid_autoinc.py
index 6bcaa9a1029240c1e8a74303dcbbf7378d3fdf5e..632f4c4eb14082f4d5564626639d5c21b8e7de42 100755
--- a/contrib/ast-db-manage/config/versions/5139253c0423_make_q_member_uniqueid_autoinc.py
+++ b/contrib/ast-db-manage/config/versions/5139253c0423_make_q_member_uniqueid_autoinc.py
@@ -33,28 +33,31 @@ import sqlalchemy as sa
 
 
 def upgrade():
+    context = op.get_context()
     # Was unable to find a way to use op.alter_column() to add the unique
     # index property.
-    op.drop_column('queue_members', 'uniqueid')
-    op.add_column(
-        'queue_members',
-        sa.Column(
-            name='uniqueid', type_=sa.Integer, nullable=False,
-            unique=True))
+    if context.bind.dialect.name == 'sqlite':
+        with op.batch_alter_table('queue_members') as batch_op:
+            batch_op.create_primary_key('queue_members_pj', columns='uniqueid')
+    else:
+        op.drop_column('queue_members', 'uniqueid')
+        op.add_column(
+                      'queue_members',
+                      sa.Column(
+                                name='uniqueid', type_=sa.Integer, nullable=False,
+                                unique=True))
     # The postgres backend does not like the autoincrement needed for
     # mysql here.  It is just the backend that is giving a warning and
     # not the database itself.
-    op.alter_column(
-        table_name='queue_members', column_name='uniqueid',
-        existing_type=sa.Integer, existing_nullable=False,
-        autoincrement=True)
+        op.alter_column(
+                        table_name='queue_members', column_name='uniqueid',
+                        existing_type=sa.Integer, existing_nullable=False,
+                        autoincrement=True)
 
 
 def downgrade():
     # Was unable to find a way to use op.alter_column() to remove the
     # unique index property.
-    op.drop_column('queue_members', 'uniqueid')
-    op.add_column(
-        'queue_members',
-        sa.Column(name='uniqueid', type_=sa.String(80), nullable=False))
-
+    with op.batch_alter_table('queue_members') as batch_op:
+        batch_op.drop_column('uniqueid')
+        batch_op.add_column(sa.Column(name='uniqueid', type_=sa.String(80), nullable=False))
diff --git a/contrib/ast-db-manage/config/versions/51f8cb66540e_add_further_dtls_options.py b/contrib/ast-db-manage/config/versions/51f8cb66540e_add_further_dtls_options.py
index c2dacda2c682ce7e4f4bbeae42e08e481a23e96a..8d0f68f03d9afb0afda151e7c78a19f0015b5236 100644
--- a/contrib/ast-db-manage/config/versions/51f8cb66540e_add_further_dtls_options.py
+++ b/contrib/ast-db-manage/config/versions/51f8cb66540e_add_further_dtls_options.py
@@ -28,5 +28,6 @@ def upgrade():
     op.add_column('ps_endpoints', sa.Column('media_use_received_transport', yesno_values))
 
 def downgrade():
-    op.drop_column('ps_endpoints', 'force_avp')
-    op.drop_column('ps_endpoints', 'media_use_received_transport')
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.drop_column('force_avp')
+        batch_op.drop_column('media_use_received_transport')
diff --git a/contrib/ast-db-manage/config/versions/5950038a6ead_fix_pjsip_verifiy_typo.py b/contrib/ast-db-manage/config/versions/5950038a6ead_fix_pjsip_verifiy_typo.py
index 28ebc8b1773f606aa2fb5492aac52ace211c9523..ace5444231d947b9c2a806fc50c9c1e01fa2a27e 100644
--- a/contrib/ast-db-manage/config/versions/5950038a6ead_fix_pjsip_verifiy_typo.py
+++ b/contrib/ast-db-manage/config/versions/5950038a6ead_fix_pjsip_verifiy_typo.py
@@ -19,11 +19,13 @@ YESNO_VALUES = ['yes', 'no']
 
 def upgrade():
     yesno_values = ENUM(*YESNO_VALUES, name=YESNO_NAME, create_type=False)
-    op.alter_column('ps_transports', 'verifiy_server', type_=yesno_values,
+    with op.batch_alter_table('ps_transports') as batch_op:
+        batch_op.alter_column('verifiy_server', type_=yesno_values,
                     new_column_name='verify_server')
 
 
 def downgrade():
     yesno_values = ENUM(*YESNO_VALUES, name=YESNO_NAME, create_type=False)
-    op.alter_column('ps_transports', 'verify_server', type_=yesno_values,
+    with op.batch_alter_table('ps_transports') as batch_op:
+        batch_op.alter_column('verify_server', type_=yesno_values,
                     new_column_name='verifiy_server')
diff --git a/contrib/ast-db-manage/config/versions/945b1098bdd_add_media_encryption_optimistic_to_pjsip.py b/contrib/ast-db-manage/config/versions/945b1098bdd_add_media_encryption_optimistic_to_pjsip.py
index 7a463f0575313d93fa7b2751df8dc0b6e1fb925a..fff25040342a108fc92663dbf222f842696067eb 100644
--- a/contrib/ast-db-manage/config/versions/945b1098bdd_add_media_encryption_optimistic_to_pjsip.py
+++ b/contrib/ast-db-manage/config/versions/945b1098bdd_add_media_encryption_optimistic_to_pjsip.py
@@ -28,4 +28,5 @@ def upgrade():
 
 
 def downgrade():
-    op.drop_column('ps_endpoints', 'media_encryption_optimistic')
+    with op.batch_alter_table('ps_endpoints') as batch_op:
+        batch_op.drop_column('media_encryption_optimistic')
diff --git a/contrib/ast-db-manage/config/versions/a541e0b5e89_add_pjsip_max_initial_qualify_time.py b/contrib/ast-db-manage/config/versions/a541e0b5e89_add_pjsip_max_initial_qualify_time.py
index 0ffd7848da25541c30d19695e93c435d2ef423ef..dc06d84ef1e77d1c1ace352d5e04acd9f16da0d6 100644
--- a/contrib/ast-db-manage/config/versions/a541e0b5e89_add_pjsip_max_initial_qualify_time.py
+++ b/contrib/ast-db-manage/config/versions/a541e0b5e89_add_pjsip_max_initial_qualify_time.py
@@ -17,4 +17,5 @@ def upgrade():
     op.add_column('ps_globals', sa.Column('max_initial_qualify_time', sa.Integer))
 
 def downgrade():
-    op.drop_column('ps_globals', 'max_initial_qualify_time')
+    with op.batch_alter_table('ps_globals') as batch_op:
+        batch_op.drop_column('max_initial_qualify_time')
diff --git a/contrib/ast-db-manage/config/versions/dbc44d5a908_add_missing_columns_to_sys_and_reg.py b/contrib/ast-db-manage/config/versions/dbc44d5a908_add_missing_columns_to_sys_and_reg.py
index 8f4621642def0d427d1086e6c884fc223cd4e333..b4502eb3d13a0e95766ccbddb38fae3d6d763cd0 100644
--- a/contrib/ast-db-manage/config/versions/dbc44d5a908_add_missing_columns_to_sys_and_reg.py
+++ b/contrib/ast-db-manage/config/versions/dbc44d5a908_add_missing_columns_to_sys_and_reg.py
@@ -27,11 +27,10 @@ def upgrade():
     op.add_column('ps_systems', sa.Column('disable_tcp_switch', yesno_values))
     op.add_column('ps_registrations', sa.Column('line', yesno_values))
     op.add_column('ps_registrations', sa.Column('endpoint', sa.String(40)))
-    pass
-
 
 def downgrade():
-    op.drop_column('ps_systems', 'disable_tcp_switch')
-    op.drop_column('ps_registrations', 'line')
-    op.drop_column('ps_registrations', 'endpoint')
-    pass
+    with op.batch_alter_table('ps_systems') as batch_op:
+        batch_op.drop_column('disable_tcp_switch')
+    with op.batch_alter_table('ps_registrations') as batch_op:
+        batch_op.drop_column('line')
+        batch_op.drop_column('endpoint')
diff --git a/contrib/ast-db-manage/config/versions/e96a0b8071c_increase_pjsip_column_size.py b/contrib/ast-db-manage/config/versions/e96a0b8071c_increase_pjsip_column_size.py
index d386ded3fb8ab01f89f3b297a719a21db0b574a5..f25c2987e6f34aa757d2844db2390f20979e318b 100644
--- a/contrib/ast-db-manage/config/versions/e96a0b8071c_increase_pjsip_column_size.py
+++ b/contrib/ast-db-manage/config/versions/e96a0b8071c_increase_pjsip_column_size.py
@@ -15,25 +15,28 @@ import sqlalchemy as sa
 
 
 def upgrade():
-    op.alter_column('ps_globals', 'user_agent', type_=sa.String(255))
+    with op.batch_alter_table('ps_globals') as batch_op:
+        batch_op.alter_column('user_agent', type_=sa.String(255))
 
-    op.alter_column('ps_contacts', 'id', type_=sa.String(255))
-    op.alter_column('ps_contacts', 'uri', type_=sa.String(255))
-    op.alter_column('ps_contacts', 'user_agent', type_=sa.String(255))
+    with op.batch_alter_table('ps_contacts') as batch_op:
+        batch_op.alter_column('id', type_=sa.String(255))
+        batch_op.alter_column('uri', type_=sa.String(255))
+        batch_op.alter_column('user_agent', type_=sa.String(255))
 
-    op.alter_column('ps_registrations', 'client_uri', type_=sa.String(255))
-    op.alter_column('ps_registrations', 'server_uri', type_=sa.String(255))
+    with op.batch_alter_table('ps_registrations') as batch_op:
+        batch_op.alter_column('client_uri', type_=sa.String(255))
+        batch_op.alter_column('server_uri', type_=sa.String(255))
 
 
 def downgrade():
-    op.alter_column('ps_registrations', 'server_uri', type_=sa.String(40))
-    op.alter_column('ps_registrations', 'client_uri', type_=sa.String(40))
-
-    op.alter_column('ps_contacts', 'user_agent', type_=sa.String(40))
-    op.alter_column('ps_contacts', 'uri', type_=sa.String(40))
-    op.alter_column('ps_contacts', 'id', type_=sa.String(40))
-
-    op.alter_column('ps_globals', 'user_agent', type_=sa.String(40))
-
+    with op.batch_alter_table('ps_globals') as batch_op:
+        batch_op.alter_column('user_agent', type_=sa.String(40))
 
+    with op.batch_alter_table('ps_contacts') as batch_op:
+        batch_op.alter_column('id', type_=sa.String(40))
+        batch_op.alter_column('uri', type_=sa.String(40))
+        batch_op.alter_column('user_agent', type_=sa.String(40))
 
+    with op.batch_alter_table('ps_registrations') as batch_op:
+        batch_op.alter_column('client_uri', type_=sa.String(40))
+        batch_op.alter_column('server_uri', type_=sa.String(40))