[ADD] base_external_dbsource_sap_hana: New module to connect to SAP Hana using Alchemy

TT38753

base_external_dbsource_sap_hana/models/__init__.py

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+from . import base_external_dbsource

base_external_dbsource_sap_hana/models/base_external_dbsource.py

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+# Copyright 2022 Tecnativa - Sergio Teruel
+# License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl.html).
+
+
+import sqlalchemy
+
+from odoo import models
+
+from odoo.addons.base_external_dbsource.models import base_external_dbsource
+
+base_external_dbsource.BaseExternalDbsource.CONNECTORS.append(("sap_hana", "SAP-Hana"))
+
+
+class BaseExternalDbsource(models.Model):
+    """It provides logic for connection to a SAP Hana data source."""
+
+    _inherit = "base.external.dbsource"
+
+    def connection_close_sap_hana(self, connection):
+        return connection.close()
+
+    def connection_open_sap_hana(self):
+        return sqlalchemy.create_engine(self.conn_string_full).connect()
+
+    def execute_sap_hana(self, sqlquery, sqlparams, metadata):
+        # FIXME: Duplicated method in modules to be consolidated in base
+        rows, cols = list(), list()
+        for record in self:
+            with record.connection_open() as connection:
+                if sqlparams is None:
+                    cur = connection.execute(sqlquery)
+                else:
+                    cur = connection.execute(sqlquery, sqlparams)
+                if metadata:
+                    cols = list(cur.keys())
+                rows = [r for r in cur]
+        return rows, cols