1) Added support for setting PostgreSQL connection parameters. #4728

2) Fixed an issue where Kerberos authentication to the server is not imported/exported. #5732
3) Increase the length of the value column of the setting table. #5746
4) Upgrade Flask-Migrate to 4.0.0. #5525

web/migrations/versions/f656e56dfdc8_.py

@@ -0,0 +1,99 @@
+##########################################################################
+#
+# pgAdmin 4 - PostgreSQL Tools
+#
+# Copyright (C) 2013 - 2023, The pgAdmin Development Team
+# This software is released under the PostgreSQL Licence
+#
+##########################################################################
+""" Used for connection parameter changes in the server table.
+
+Revision ID: f656e56dfdc8
+Revises: f79844e926ae
+Create Date: 2023-01-02 14:52:48.109290
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision = 'f656e56dfdc8'
+down_revision = 'f79844e926ae'
+branch_labels = None
+depends_on = None
+
+
+def migrate_connection_params(table_name):
+    """
+    This function is used to add connection parameter as JSON data and drop
+    unused columns.
+    """
+    op.add_column(table_name,
+                  sa.Column('connection_params', sa.JSON()))
+
+    # define table representation
+    meta = sa.MetaData(bind=op.get_bind())
+    meta.reflect(only=(table_name,))
+    server_table = sa.Table(table_name, meta)
+
+    # Create a select statement
+    stmt = sa.select([
+        server_table.columns.id, server_table.columns.ssl_mode,
+        server_table.columns.sslcert, server_table.columns.sslkey,
+        server_table.columns.sslrootcert, server_table.columns.sslcrl,
+        server_table.columns.sslcompression, server_table.columns.hostaddr,
+        server_table.columns.passfile, server_table.columns.connect_timeout
+    ])
+
+    # Fetch the data from the server table
+    results = op.get_bind().execute(stmt).fetchall()
+    for rows in results:
+        connection_params = {}
+        server_id = 0
+        for key, value in rows.items():
+            if key == 'id':
+                server_id = value
+            # Name is changed from ssl_mode to sslmode
+            if key == 'ssl_mode':
+                key = 'sslmode'
+
+            if value is not None and key != 'id':
+                connection_params[key] = value
+
+        # Update the newly added column with JSON data.
+        op.execute(
+            server_table.update().where(server_table.columns.id == server_id)
+            .values(connection_params=connection_params)
+        )
+
+    # Drop unused columns
+    with op.batch_alter_table(table_name) as batch_op:
+        if table_name == 'server':
+            batch_op.drop_constraint('ck_ssl_mode')
+        batch_op.drop_column('ssl_mode')
+        batch_op.drop_column('sslcert')
+        batch_op.drop_column('sslkey')
+        batch_op.drop_column('sslrootcert')
+        batch_op.drop_column('sslcrl')
+        batch_op.drop_column('sslcompression')
+        batch_op.drop_column('hostaddr')
+        batch_op.drop_column('passfile')
+        batch_op.drop_column('connect_timeout')
+
+
+def upgrade():
+    migrate_connection_params('server')
+    migrate_connection_params('sharedserver')
+
+    # Increasing the length of the value column of the setting table.
+    with op.batch_alter_table("setting") as batch_op:
+        batch_op.alter_column('value',
+                              existing_type=sa.String(length=1024),
+                              type_=sa.String(length=2048),
+                              existing_nullable=False)
+
+
+def downgrade():
+    # pgAdmin only upgrades, downgrade not implemented.
+    pass