List Pending Text-to-SQL Queries from Postgres

The workflow JSON

Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →

{
  "name": "Text-to-SQL: List Pending Queries",
  "nodes": [
    {
      "parameters": {
        "httpMethod": "GET",
        "path": "pending-queries",
        "responseMode": "responseNode",
        "options": {}
      },
      "id": "webhook3",
      "name": "Webhook - List Pending",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 1,
      "position": [
        250,
        300
      ]
    },
    {
      "parameters": {
        "operation": "executeQuery",
        "query": "SELECT\n  job_id,\n  question,\n  schema_info,\n  environment,\n  language,\n  user_id,\n  created_at,\n  EXTRACT(EPOCH FROM (NOW() - created_at)) as age_seconds\nFROM sql_queue\nWHERE status = 'pending'\nORDER BY created_at ASC\nLIMIT 50;",
        "options": {}
      },
      "id": "postgres4",
      "name": "Get Pending from DB",
      "type": "n8n-nodes-base.postgres",
      "typeVersion": 2.4,
      "position": [
        450,
        300
      ],
      "credentials": {
        "postgres": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "operation": "executeQuery",
        "query": "SELECT\n  environment,\n  status,\n  COUNT(*) as count\nFROM sql_queue\nWHERE created_at > NOW() - INTERVAL '24 hours'\nGROUP BY environment, status\nORDER BY environment, status;",
        "options": {}
      },
      "id": "postgres5",
      "name": "Get Queue Stats",
      "type": "n8n-nodes-base.postgres",
      "typeVersion": 2.4,
      "position": [
        450,
        450
      ],
      "credentials": {
        "postgres": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "jsCode": "// Merge pending queries and stats\nconst pendingQueries = $input.item(0).json;\nconst stats = $input.item(1).json;\n\n// Calculate totals\nconst totalPending = pendingQueries.length;\nconst oldestAgeSeconds = totalPending > 0 ? pendingQueries[0].age_seconds : 0;\n\n// Group stats by environment\nconst statsByEnv = {};\nstats.forEach(s => {\n  if (!statsByEnv[s.environment]) {\n    statsByEnv[s.environment] = {};\n  }\n  statsByEnv[s.environment][s.status] = s.count;\n});\n\nreturn {\n  total_pending: totalPending,\n  oldest_age_seconds: oldestAgeSeconds,\n  oldest_age_minutes: Math.round(oldestAgeSeconds / 60 * 10) / 10,\n  requests: pendingQueries,\n  stats_24h: statsByEnv,\n  recommendation: totalPending > 20 \n    ? 'High queue load - consider batch processing' \n    : totalPending > 0 \n    ? 'Ready for processing' \n    : 'No pending requests'\n};"
      },
      "id": "code2",
      "name": "Format Response",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        650,
        300
      ]
    },
    {
      "parameters": {
        "respondWith": "json",
        "responseBody": "={{ $json }}",
        "options": {}
      },
      "id": "respond3",
      "name": "Respond to Webhook",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1,
      "position": [
        850,
        300
      ]
    }
  ],
  "connections": {
    "Webhook - List Pending": {
      "main": [
        [
          {
            "node": "Get Pending from DB",
            "type": "main",
            "index": 0
          },
          {
            "node": "Get Queue Stats",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Get Pending from DB": {
      "main": [
        [
          {
            "node": "Format Response",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Get Queue Stats": {
      "main": [
        [
          {
            "node": "Format Response",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Format Response": {
      "main": [
        [
          {
            "node": "Respond to Webhook",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "active": false,
  "settings": {
    "executionOrder": "v1"
  },
  "versionId": "1",
  "id": "text-to-sql-pending",
  "tags": [
    {
      "createdAt": "2025-01-23T00:00:00.000Z",
      "updatedAt": "2025-01-23T00:00:00.000Z",
      "id": "1",
      "name": "text-to-sql"
    }
  ]
}

Credentials you'll need

Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.

• postgres

About this workflow

Text-to-SQL: List Pending Queries. Uses postgres. Webhook trigger; 5 nodes.

Source: https://github.com/GalSened/text-to-sql-teams-bot/blob/2850aece4e7c0fd2ef2ca9211c0830ffffc51414/n8n-workflows/list_pending.json — original creator credit. Request a take-down →

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