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Integration · MySQL · MariaDB

Generate MySQL test data, with foreign keys intact

Multi-table fixtures that load with mysql --local-infile=1 and import_mysql.sql. Free web sessions.

Short answer

Design a multi-table schema in SynthForge, generate, and download the MySQL export. You get import_mysql.sql (CREATE TABLE with FKs plus LOAD DATA LOCAL INFILE) and per-table CSVs. Every child row references a real parent by construction. Use --local-infile=1 so MySQL can read the CSVs from your machine.

Why generate rather than hand-roll

Laravel, WordPress-adjacent apps, and plenty of cloud MySQL staging DBs still need multi-table seed data. Hand-written Faker scripts break foreign keys; repair becomes the job.

SynthForge sorts tables by dependency, generates parents first, and samples FKs from IDs that exist. The same schema can also export to Postgres or DuckDB when your stack mixes engines.

How to do it

1. Define the schema

Describe tables in plain English, build them in the visual editor, or paste CREATE TABLE DDL. AI forge and SQL import both produce multi-table schemas with single-column foreign keys.

2. Set cardinality (optional)

Use relationship ratios such as "1 to 4 orders per customer" instead of inventing every child row count. Parents generate first; child foreign keys are sampled from real parent IDs.

3. Generate and export MySQL

Pick MySQL as the SQL dialect (or include SQL export in formats). The download ZIP contains import_mysql.sql (CREATE TABLE with FKs plus LOAD DATA LOCAL INFILE loaders) and csv/<table>.csv data files. MariaDB gets the same pattern via import_mariadb.sql.

4. Enable LOCAL INFILE, then load

MySQL 8+ often disables local_infile on client and server. The import script header documents the fix. Extract the ZIP, cd into the folder so csv/ paths resolve, then run:

bash
# Allow client-side CSV load (MySQL 8+ often needs both)
# Server (once, if ERROR 3948 / local data disabled):
#   mysql -u root -p -e "SET GLOBAL local_infile = 1;"

mysql -e "CREATE DATABASE myapp_staging"
mysql -u user -p --local-infile=1 myapp_staging < import_mysql.sql

# Loaders look like:
#   LOAD DATA LOCAL INFILE 'csv/customers.csv'
#   INTO TABLE customers
#   FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' ESCAPED BY ''
#   ...

5. (Optional) Agent path

With an API key and hosted MCP, agents can run description_to_dataset, download the ZIP, and you still load with import_mysql.sql. First API key includes 10 free credits; web sessions stay free.

text
# MCP endpoint: https://mcp.synthforge.io/mcp
# Auth: Authorization: Bearer sfk_live_…
# Docs: https://synthforge.io/docs/mcp

Frequently asked questions

Why do I need --local-infile=1?
LOAD DATA LOCAL INFILE streams CSVs from your machine into the server. MySQL 8+ disables that by default (ERROR 3948). Use --local-infile=1 on the client, and if needed SET GLOBAL local_infile = 1 on the server. The import_mysql.sql header documents both steps.
Does MySQL enforce the foreign keys?
Yes, when you use InnoDB tables with FOREIGN KEY constraints. SynthForge emits FK-aware CREATE TABLE for MySQL, and the data is also referentially valid by construction: child keys are drawn from generated parent IDs.
Does this work with MariaDB or cloud MySQL?
MariaDB: use the MariaDB dialect export (import_mariadb.sql) with the same --local-infile pattern. Managed MySQL: as long as the client can LOCAL INFILE and your user is allowed, the same script works. Some managed hosts restrict LOCAL INFILE; in that case load CSVs with your provider's import tool or use a temporary bastion with local_infile enabled.
How large a dataset can I generate?
Up to 10,000,000 rows per table per request, with per-account rate limits. Flat formats stream out of core; nested JSON stays full-RAM and is gated earlier.
Can I use the same schema for Postgres or DuckDB?
Yes. One schema exports to PostgreSQL, MySQL, SQLite, SQL Server, MariaDB, DuckDB, and CockroachDB, plus CSV, JSON, JSONL, and Parquet.
Does SynthForge use my real production data?
No. It generates greenfield data from the schema you provide. It does not ingest or de-identify a live database. For anonymizing real data, use tools like Tonic or NVIDIA NeMo.

Related

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Generate multi-table MySQL data with real foreign keys, then load with one mysql command. No credit card for the web app.