Add flatten data + empty metadata

api/src/engine/connectors/exareme/transformations.ts

@@ -6,27 +6,40 @@ import * as jsonata from 'jsonata'; // old import style needed because of 'expor
 export const transientToTable = jsonata(`
 ( 
   $e := function($x) {(
-    ($x != null) ? $x : ''
+      ($x != null) ? $x : ''
   )};
 
+  $fn := function($o, $prefix) { 
+      $each($o, function($v, $k) {(
+          $name := $join([$prefix,$k], '/');
+          $type($v) = 'object' ? $fn($v, $name): {
+              $name: $v
+          }
+      )}) ~> $merge()
+  };
+
   result.data.[
-    $.single.*@$p#$i.{
-      'groupBy' : 'single',
-      'name': $keys(%)[$i],
-      'metadatas': $keys(*).{
-        'name': $,
-        'type': 'string'
-      },
-      'data' : [
-        [$keys(%)[$i], $p.*.($e(num_total))],
-        ['Datapoints', $p.*.($e(num_datapoints))],
-        ['Nulls', $p.*.($e(num_nulls))],
-        ['std', $p.*.data.($e(std))],
-        ['max', $p.*.data.($e(max))],
-        ['min', $p.*.data.($e(min))],
-        ['mean', $p.*.data.($e(mean))]
-      ]
-    }
+      $.single.*@$p#$i.{
+          'groupBy' : 'single',
+          'name': $keys(%)[$i],
+          'metadatas': $append("", $keys(*)).{
+              'name': $,
+              'type': 'string'
+          },
+          'data' : [
+              [$keys(%)[$i], $p.*.($e(num_total))],
+              ['Datapoints', $p.*.($e(num_datapoints))],
+              ['Nulls', $p.*.($e(num_nulls))],
+              $p.*.data.($fn($)) ~> $reduce(function($a, $b) {
+                  $each($a, function($v, $k) {(
+                      $val := $lookup($b,$k);
+                      {
+                          $k : [$v, ($val != null) ? $val : '']
+                      }
+                  )}) ~> $merge()
+              }) ~> $each(function($v, $k) {$append($k,$v)}) 
+          ]
+      }
   ]
 )
 `);