Merge MySQL & Postgres Data via Webhook

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 →

{
  "nodes": [
    {
      "name": "emitirEtiqueta",
      "type": "n8n-nodes-base.webhook",
      "position": [
        440,
        1290
      ],
      "parameters": {
        "path": "emitirEtiqueta",
        "options": {},
        "httpMethod": "POST",
        "responseData": "allEntries",
        "responseMode": "lastNode"
      },
      "typeVersion": 1
    },
    {
      "name": "dadosProduto",
      "type": "n8n-nodes-base.mySql",
      "position": [
        1270,
        1440
      ],
      "parameters": {
        "query": "=-- CONSULTA DO PRODUTO GRADE\nWITH pg as (\n\tSELECT\n\t\tid,\n\t\tid_produto,\n\t\tid_gradex,\n\t\tid_gradey,\n\t\tcodigo \n\tFROM\n\t\tproduto_grade \n\tWHERE\n\t\tid = '{{$node[\"emitirEtiqueta\"].json[\"body\"][\"id_produto_grade\"]}}'\n),\n\n-- CONSULTA DO PRODUTO\np as (\n\tSELECT * FROM produto \n\tWHERE id IN ( SELECT id_produto  FROM pg)\n\tAND situacao = 'ATIVO'\n),\n\n-- CONSULTA TECIDO\nt as (\n\tSELECT\n\t\ttoken,\n\t\t JSON_UNQUOTE(json_extract( objeto, '$.largura')) AS largura\n\tFROM\n\t\t`{{$node[\"PegarConfiguracaoImpressao\"].json[\"params\"][\"bancoRelatorio\"]}}`.`i_objeto` \n\tWHERE\n\t\tmodulo = 'produto_grade_tecido'\n\t\tand token in (select id from pg)\n\t\tand situacao = 'ATIVO'\n),\n\n\n-- CONSULTA COMPOSICAO\ncp as (\n\t\n\tSELECT\n\t  token,\n    group_concat(concat(cps.participacao,'% ',cps.descricao)) as composicao\n\tFROM\n\t\t`{{$node[\"PegarConfiguracaoImpressao\"].json[\"params\"][\"bancoRelatorio\"]}}`.`i_objeto`,\n\t\tJSON_TABLE (\n\t\t\t\t\t\t\t\t\tobjeto,\n\t\t\t\t\t\t\t\t\t\t\t'$[*]' COLUMNS (  \n\t\t\t\t\t\t\t\t\t\t\t\t\tparticipacao INT path '$.participacao',\n\t\t\t\t\t\t\t\t\t\t\t\t\tdescricao TEXT path '$.descricao'\n\t\t\t\t\t\t\t\t\t\t\t)\n\t\t\t\t\t\t\t) AS cps \n\t\tWHERE modulo = 'produto_grade_tecido_composicao'\n\t\tAND token in (select id from pg)\n\t\tAND situacao = 'ATIVO'\n\t\tAND cps.participacao > 0\n\t\tGROUP BY token\n\t\tORDER BY participacao desc\n\t\t\n)\n\n\n-- CONSULTA RELATORIO\nSELECT\n{{$node[\"emitirEtiqueta\"].json[\"body\"][\"id_movimentacao_detalhe\"]}} as id_movimentacao_detalhe ,\n     pg.id, \n\tpg.codigo,\n\tp.descricao,\n\tm.nome as marca,\n\tgx.nome as gradex,\n\tgy.nome as gradey,\n\tcurdate() as data_entrada,\n  t.largura,\n\tcp.composicao\nFROM\n\tpg inner join p on (p.id = pg.id_produto)\n\tinner join marca m on(m.id = p.id_marca)\n\tleft join grade gx on (gx.id = pg.id_gradex)\n\tleft join grade gy on (gy.id = pg.id_gradey)\n\tleft join t on (t.token = pg.id)\n\tleft join cp on (cp.token = pg.id)",
        "operation": "executeQuery"
      },
      "credentials": {
        "mySql": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1
    },
    {
      "name": "PegarConfiguracaoImpressao",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        730,
        1290
      ],
      "parameters": {
        "url": "http://localhost:1337/parse/config",
        "options": {},
        "jsonParameters": true,
        "headerParametersJson": "{\"X-Parse-Application-Id\": \"iwms\"}"
      },
      "typeVersion": 1
    },
    {
      "name": "dadosRolo",
      "type": "n8n-nodes-base.postgres",
      "position": [
        1260,
        1220
      ],
      "parameters": {
        "query": "=select * from \"tecido_rolo\"\nwhere \"objectId\" in ('{{$json[\"idRolos\"].join(\"','\")}}')",
        "operation": "executeQuery",
        "additionalFields": {}
      },
      "credentials": {
        "postgres": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1
    },
    {
      "name": "trataRetorno",
      "type": "n8n-nodes-base.function",
      "position": [
        1010,
        1220
      ],
      "parameters": {
        "functionCode": "// Code here will run only once, no matter how many input items there are.\n// More info and help: https://docs.n8n.io/nodes/n8n-nodes-base.function\n\n\n// var produto = items[0].json;\n\n\nvar rolos = $node[\"emitirEtiqueta\"].json[\"body\"][\"rolos\"];\n\n\nvar idRolos = rolos.map(\n    function(rolo){\n        return rolo.objectId\n    });\n    \nvar retorno = [];\n\nretorno.push({json:{\n   // produto:produto,\n    idRolos:idRolos \n}})\n\nreturn retorno;"
      },
      "typeVersion": 1
    },
    {
      "name": "roloProduto",
      "type": "n8n-nodes-base.merge",
      "position": [
        1640,
        1330
      ],
      "parameters": {
        "mode": "mergeByKey",
        "propertyName1": "id_movimentacao_detalhe",
        "propertyName2": "id_movimentacao_detalhe"
      },
      "typeVersion": 1
    }
  ],
  "connections": {
    "dadosRolo": {
      "main": [
        [
          {
            "node": "roloProduto",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "dadosProduto": {
      "main": [
        [
          {
            "node": "roloProduto",
            "type": "main",
            "index": 1
          }
        ]
      ]
    },
    "trataRetorno": {
      "main": [
        [
          {
            "node": "dadosRolo",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "emitirEtiqueta": {
      "main": [
        [
          {
            "node": "PegarConfiguracaoImpressao",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "PegarConfiguracaoImpressao": {
      "main": [
        [
          {
            "node": "dadosProduto",
            "type": "main",
            "index": 0
          },
          {
            "node": "trataRetorno",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

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.

• mySql
• postgres

About this workflow

Join Data From Postgres And Mysql. Uses mySql, httpRequest, postgres. Webhook trigger; 6 nodes.

Source: https://github.com/Zie619/n8n-workflows — original creator credit. Request a take-down →

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