From 9c9e4e59f7fc6dd7b13083c7acb500e853b8b337 Mon Sep 17 00:00:00 2001
From: Pierre GIRAUD <pierre.giraud@dalibo.com>
Date: Thu, 10 Oct 2024 11:51:18 +0200
Subject: [PATCH 1/3] Use composition utility to show number of planned workers

---
 src/components/WorkersDetail.vue | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/components/WorkersDetail.vue b/src/components/WorkersDetail.vue
index cb082149..5942c0eb 100644
--- a/src/components/WorkersDetail.vue
+++ b/src/components/WorkersDetail.vue
@@ -23,15 +23,17 @@ const viewOptions = inject(ViewOptionsKey) as ViewOptions
 const helpService = new HelpService()
 const getHelpMessage = helpService.getHelpMessage
 
-const { workersLaunchedCount } = useNode(plan, node, viewOptions)
+const { workersLaunchedCount, workersPlannedCount } = useNode(
+  plan,
+  node,
+  viewOptions
+)
 </script>
 <template>
   <!-- workers tab -->
   <div>
     <b>Workers planned: </b>
-    <span class="px-1">{{
-      node[NodeProp.WORKERS_PLANNED] || node[NodeProp.WORKERS_PLANNED_BY_GATHER]
-    }}</span>
+    <span class="px-1">{{ workersPlannedCount }} </span>
     <em
       v-if="
         !node[NodeProp.WORKERS_PLANNED] &&

From 5e7aaf504d251208bc3e16617175eee4782b7910 Mon Sep 17 00:00:00 2001
From: Pierre GIRAUD <pierre.giraud@dalibo.com>
Date: Thu, 10 Oct 2024 11:57:26 +0200
Subject: [PATCH 2/3] Show help message when number of launched workers is
 fuzzy

---
 src/components/WorkersDetail.vue | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/components/WorkersDetail.vue b/src/components/WorkersDetail.vue
index 5942c0eb..9ef0839f 100644
--- a/src/components/WorkersDetail.vue
+++ b/src/components/WorkersDetail.vue
@@ -52,6 +52,20 @@ const { workersLaunchedCount, workersPlannedCount } = useNode(
   <div>
     <b>Workers launched: </b>
     <span class="px-1">{{ workersLaunchedCount }}</span>
+    <em
+      v-if="
+        !node[NodeProp.WORKERS_LAUNCHED] &&
+        !node[NodeProp.WORKERS] &&
+        (!plan.isVerbose || !plan.isAnalyze)
+      "
+      class="text-warning"
+    >
+      <FontAwesomeIcon
+        :icon="faExclamationTriangle"
+        class="cursor-help"
+        v-tippy="getHelpMessage('fuzzy needs verbose')"
+      ></FontAwesomeIcon>
+    </em>
   </div>
   <div
     v-if="!workersLaunchedCount && node[NodeProp.WORKERS_PLANNED_BY_GATHER]"

From a66528d14f69cd8ae37f31cd3dc91a12db0c56ea Mon Sep 17 00:00:00 2001
From: Pierre GIRAUD <pierre.giraud@dalibo.com>
Date: Thu, 10 Oct 2024 11:58:17 +0200
Subject: [PATCH 3/3] Estimate number of launched workers from gather node

If the count is not available in the node itself.

Fixes #578
---
 src/enums.ts                 | 1 +
 src/node.ts                  | 3 +++
 src/services/plan-service.ts | 3 +++
 3 files changed, 7 insertions(+)

diff --git a/src/enums.ts b/src/enums.ts
index 3168a382..b4816f73 100644
--- a/src/enums.ts
+++ b/src/enums.ts
@@ -127,6 +127,7 @@ export enum NodeProp {
   AVERAGE_IO_WRITE_TIME = "*I/O Write Speed (exclusive)",
 
   WORKERS_PLANNED_BY_GATHER = "*Workers Planned By Gather",
+  WORKERS_LAUNCHED_BY_GATHER = "*Workers Launched By Gather",
 
   CTE_SCAN = "CTE Scan",
   CTE_NAME = "CTE Name",
diff --git a/src/node.ts b/src/node.ts
index 5c648019..1badb8c0 100644
--- a/src/node.ts
+++ b/src/node.ts
@@ -245,6 +245,9 @@ export default function useNode(
     if (node[NodeProp.WORKERS_LAUNCHED]) {
       return node[NodeProp.WORKERS_LAUNCHED] as number
     }
+    if (node[NodeProp.WORKERS_LAUNCHED_BY_GATHER]) {
+      return node[NodeProp.WORKERS_LAUNCHED_BY_GATHER] as number
+    }
     const workers = node[NodeProp.WORKERS] as Worker[]
     return workers ? workers.length : NaN
   })
diff --git a/src/services/plan-service.ts b/src/services/plan-service.ts
index 12e3937f..3fcd4db1 100644
--- a/src/services/plan-service.ts
+++ b/src/services/plan-service.ts
@@ -89,6 +89,9 @@ export class PlanService {
         child[NodeProp.WORKERS_PLANNED_BY_GATHER] =
           node[NodeProp.WORKERS_PLANNED] ||
           node[NodeProp.WORKERS_PLANNED_BY_GATHER]
+        child[NodeProp.WORKERS_LAUNCHED_BY_GATHER] =
+          node[NodeProp.WORKERS_LAUNCHED] ||
+          node[NodeProp.WORKERS_LAUNCHED_BY_GATHER]
       }
       if (this.isCTE(child)) {
         plan.ctes.push(child)