Merge pull request #37 from fleetside72/schema

Schema

.gitignore

@@ -2,3 +2,5 @@
 .dbeaver-data-sources.xml
 .project
 Scripts/
+*.log
+*.swp

database/templates/srce.json

@@ -7,8 +7,10 @@
         "{Post Date}",
         "{Description}"
     ],
-    "schemas": {
-        "default": [
+    "schemas": [
+        {
+            "name": "default",
+            "columns": [
                 {
                     "path": "{Trans. Date}",
                     "type": "date",
@@ -34,8 +36,11 @@
                     "type": "text",
                     "column_name": "Category"
                 }
-        ],
-        "mapped": [
+            ]
+        },
+        {
+            "name": "mapped",
+            "columns": [
                 {
                     "path": "{Trans. Date}",
                     "type": "date",
@@ -73,4 +78,5 @@
                 }
             ]
         }
+    ]
 }

database/upgrade_scripts/001.extract_schemas.sql

@@ -0,0 +1,30 @@
+WITH
+mod AS (
+SELECT 
+    srce
+    ,jsonb_pretty(defn) orig
+    ,(defn - 'schemas')||
+    --rebuild the schemas key value from below
+    jsonb_build_object(
+        'schemas'
+        --aggregate all the new key values for a single soure
+        ,jsonb_agg(
+            --combine a new key 'name' with the columns for that name
+            jsonb_build_object('name',k)||jsonb_build_object('columns',v)
+        )
+    ) rebuild
+FROM 
+    tps.srce
+    LEFT JOIN LATERAL jsonb_each(defn->'schemas') WITH ORDINALITY je(k,v, rn) ON TRUE
+GROUP BY
+    srce
+    ,defn
+)
+UPDATE
+    tps.srce s
+SET
+    defn = rebuild
+FROM
+    mod
+WHERE
+    mod.srce = s.srce