PostgreSQL
MongoDB
Data Connector

Connect PostgreSQL to MongoDB

Extract tables from PostgreSQL databases, transform and validate records, and load structured data directly into MongoDB collections without writing pipeline code. Dagflux handles schema detection, document mapping, data quality gates, and loading from a visual canvas.

PostgreSQL → MongoDB Pipeline — orders + customers
Completed
PostgreSQL
orders
312,840 rows
PostgreSQL
customers
84,210 rows
Join
Orders + Customers
LEFT JOIN on customer_id
Transform
Normalize + Nest
types, dates, document fields
Branch
Quality Gate
validate schema + nulls
MongoDB
analytics.orders
collection output
6 nodes — 5 connections
312,840 ordersextracted
customer joinLEFT JOIN
Quality gate99.8% passed
MongoDB load312,214 docs
Completed in 22.1s

Move PostgreSQL data into MongoDB collections

PostgreSQL stores structured relational data for applications, CRMs, and internal systems. MongoDB is built for flexible document-based workloads. Dagflux bridges the two by extracting PostgreSQL tables, transforming rows into documents, validating outputs, and loading clean records into MongoDB without custom pipeline scripts.


From PostgreSQL tables to MongoDB documents in three steps

Dagflux uses a visual node-based canvas to build the PostgreSQL to MongoDB pipeline. Connect your source, describe the document mapping, validate, and load.

Step 01

Connect your PostgreSQL database

Add a Data Source node for your PostgreSQL instance. Dagflux detects schemas, table names, column types, and row counts automatically.

Step 02

Transform rows into documents

Join related PostgreSQL tables, clean fields, rename keys, cast types, and shape records into MongoDB-ready documents.

Step 03

Validate and load into MongoDB

Run schema checks, null checks, and row-count validation before loading clean documents into your selected MongoDB database and collection.


Transform PostgreSQL records before loading into MongoDB

Raw PostgreSQL rows often need reshaping before they fit a document collection. Dagflux helps you generate transformations from plain English, review the logic, and approve changes before execution.

Type casting and date normalization

Convert PostgreSQL timestamps, numeric fields, booleans, arrays, and text values into MongoDB-friendly document fields.

Field selection and nesting

Select only the fields you need, rename keys, create nested customer or order objects, and add derived fields.

Review before execution

Generated transformation logic is visible before it runs, so your team can review, refine, or edit before moving data.

Transform — PostgreSQL to MongoDB mapping
Generated Document Mapping
order_id → _id
created_at → createdAt
total_amount → orderTotal
customer fields → customer object
year_month → reporting period field
Ready to validate before MongoDB load

Validate data quality before loading into MongoDB

The Branch node runs validation checks before the output step, so only clean documents reach your MongoDB collection.

Document shape validation

Check that output documents contain required keys, nested objects, IDs, and expected data types before loading begins.

Completeness checks

Validate required fields, null rates, document counts, and key metrics before data reaches target collections.

Quarantine failed documents

Route failed records to review paths while clean documents continue into MongoDB.

Branch — Quality Gate — result
Validation Steps
OK_id present and non-null
OKcreatedAt converted successfully
OKorderTotal valid for 99.8% of documents
OKDocument count within expected range
VALID PATH
312,214
docs to MongoDB
REVIEW PATH
626
docs to quarantine
Validation passed — loading to MongoDB

PostgreSQLAuto-detected schemas, tables, columns, and types
MongoDBLoad to any database and collection with document mapping
BranchValidation gates before every collection load
No codeDescribe transformations and document shapes in plain English

PostgreSQL to MongoDB pipelines with full visibility

Dagflux gives data, analytics, and engineering teams a reviewable, configurable pipeline from PostgreSQL to MongoDB. Every transformation is visible, every validation rule is configurable, and every run produces logs with document counts, duration, and error details.

Speed

Build pipelines faster

Create a working PostgreSQL to MongoDB pipeline without manually writing extraction, transformation, and load scripts.

Control

Review every generated mapping

Inspect field selections, nested objects, type casts, filters, and joins before any data is moved.

Quality

Catch data issues before MongoDB

Use Branch nodes to validate required keys, type compatibility, null rates, and document counts before loading.


PostgreSQL to MongoDB workflows built with Dagflux

Applications

Move relational data into document collections

Move application tables such as orders, users, events, and subscriptions from PostgreSQL into MongoDB.

Document Models

Prepare nested documents

Join and transform PostgreSQL tables into clean MongoDB documents for apps, APIs, or operational stores.

Migration

Migrate historical data

Extract historical PostgreSQL snapshots, reshape schemas, and load structured records into MongoDB collections.

Incremental Sync

Regular scheduled syncs

Schedule recurring runs to sync new or updated PostgreSQL rows to MongoDB.

Multi-source

Combine PostgreSQL with other sources

Add CSVs, JSON files, MySQL tables, or cloud warehouse sources alongside PostgreSQL data.

Quality

Audit and validate before loading

Enforce document shape, required keys, and completeness checks before records reach production MongoDB collections.


Connect MongoDB to other data sources

Dagflux supports multiple source types alongside PostgreSQL. Add CSV exports, JSON files, MySQL databases, cloud warehouse tables, or object storage files and join them with your PostgreSQL tables before loading into MongoDB.

PostgreSQL

Extract from any schema or table with auto-detected columns and types.

CSV / Excel

Add flat file exports alongside database sources and join on shared keys.

MongoDB

Use MongoDB collections as part of larger transformation and validation workflows.

MySQL

Source from MySQL databases and merge with PostgreSQL tables in one pipeline.

Snowflake

Pull from Snowflake warehouse tables and join them with operational data.

Amazon S3

Read Parquet, CSV, or JSON files from S3 and join with PostgreSQL sources.


PostgreSQL to MongoDB FAQ

You add a Data Source node and provide PostgreSQL connection details such as host, port, database name, username, and password. Dagflux lists schemas and tables and detects columns, data types, and row counts automatically.
You add an Output node configured for MongoDB and select the target database and collection. Dagflux maps transformed rows into documents and loads validated records.
Yes. You can connect multiple PostgreSQL source nodes and combine them with Join nodes before transformation and output.
No. You can describe transformations and document shapes in plain English and review the generated logic before running it. Technical users can still refine the mapping directly.
Yes. Dagflux can help map joined PostgreSQL tables into nested MongoDB documents, including customer objects, order details, arrays, and derived fields.
Yes. Pipelines can run hourly, daily, weekly, or on a custom schedule, with execution logs for document counts, duration, validation results, and errors.

Build your PostgreSQL to MongoDB pipeline

Connect your PostgreSQL database, describe the transformation, validate the output, and load structured documents into MongoDB.

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