Add in acl exploration sql

Author: thomasyu888

analytics/acl.sql

@@ -0,0 +1,52 @@
+/* From Github Copilot
+The script begins with a Common Table Expression (CTE) named
+cte that selects the owner_id, created_on, change_timestamp,
+and resource_access fields from the aclsnapshots table.
+The resource_access field is parsed as JSON and aliased as acl.
+The CTE only includes rows where the owner_id is 8016650.
+
+The main SELECT statement then extracts data from this CTE.
+It selects the owner_id, created_on, and value fields directly.
+It also uses the COALESCE function to select the first non-null
+value from a list of possible fields in the value JSON object
+for accesstype and principalid. This is done to handle potential
+variations in the field names in the JSON object.
+
+The LATERAL FLATTEN function is used to transform the acl JSON
+object into a set of rows. The outer=>TRUE argument means that
+if acl is an empty array or null, a single row with nulls in the
+columns produced by FLATTEN is returned. This is joined with the
+CTE to produce the final result set.
+*/
+with cte as (
+    select
+        owner_id,
+        created_on,
+        change_timestamp,
+        parse_json(resource_access) as acl
+    from
+        synapse_data_warehouse.synapse_raw.aclsnapshots
+    where
+        owner_id = 8016650
+)
+
+select
+    owner_id, --noqa: RF02
+    created_on, --noqa: RF02
+    value, --noqa: RF02
+    coalesce(
+        value:"accesstype"::variant, --noqa: RF02
+        value:"accessType"::variant, --noqa: RF02
+        value:"accesstype#1"::variant, --noqa: RF02
+        value:"accesstype#2"::variant, --noqa: RF02
+        value:"accesstype#3"::variant --noqa: RF02
+    ) as accesstype,
+    coalesce(
+        value:"principalId"::number, --noqa: RF02
+        value:"principalid"::number, --noqa: RF02
+        value:"principalid#1"::number --noqa: RF02
+    ) as principalid
+
+from
+    cte,
+    lateral flatten(acl, outer => TRUE);