How to Migrate from Snowflake to MySQL in PostgreSQL

How do I migrate data, schema, and workloads from Snowflake to MySQL?

Move data, schema, and workloads from Snowflake to MySQL with export-load techniques, preserving integrity and performance.

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Description

Example H2

Example H3

Why migrate from Snowflake to MySQL?

Cut licensing costs, embed transactional workloads, or consolidate stack. MySQL offers open-source flexibility and can run side-by-side with application servers for low-latency access.

What are the prerequisites?

Grant UNLOAD privileges in Snowflake, enable AWS/GCS/Azure storage, install MySQL 8.0 with LOCAL INFILE enabled, and ensure disk space for staged CSV/Parquet files.

How to export Snowflake data to files?

Use the COPY INTO @stage command to push CSV or Parquet files to cloud storage. Include MAX_FILE_SIZE and HEADER=TRUE for manageable chunks and clear column mapping.

-- Snowflake COPY INTO @s3_stage/customers_ FROM customers FILE_FORMAT = (TYPE = CSV FIELD_DELIMITER = ',' HEADER = TRUE) MAX_FILE_SIZE = 50000000;

How do I create matching schemas in MySQL?

Generate CREATE TABLE statements with Snowflake metadata queries or tools like DESC TABLE, then map Snowflake types (NUMBER, VARCHAR, TIMESTAMP_NTZ) to MySQL types (INT, VARCHAR, DATETIME).

CREATE TABLE customers ( id INT PRIMARY KEY, name VARCHAR(255), email VARCHAR(255), created_at DATETIME );

How to load data into MySQL quickly?

Use LOAD DATA LOCAL INFILE with proper field and line terminators. Disable foreign-key checks during bulk loads, and import the largest tables first.

LOAD DATA LOCAL INFILE '/tmp/customers_0001.csv' INTO TABLE customers FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\n' IGNORE 1 LINES;

What is the full migration workflow?

Export Snowflake tables to cloud storage.
Download files to the MySQL host.
Create schemas in MySQL.
Bulk-load data.
Run verification queries (row counts, checksums).
Switch application connections.

What best practices ensure data integrity?

Hash each row in Snowflake and MySQL, compare aggregates, enforce UTF-8 in file formats, and stage writes behind maintenance windows.

What common mistakes should I avoid?

Incorrect delimiter settings and ignoring time-zone conversion lead to mis-aligned columns and date drift. Test with small subsets first.

Why How to Migrate from Snowflake to MySQL in PostgreSQL is important

How to Migrate from Snowflake to MySQL in PostgreSQL Example Usage


-- Export Products from Snowflake
COPY INTO @s3_stage/products_
  FROM products;

-- MySQL schema
CREATE TABLE products (
  id INT PRIMARY KEY,
  name VARCHAR(255),
  price DECIMAL(10,2),
  stock INT
);

-- Load into MySQL
LOAD DATA LOCAL INFILE '/tmp/products_0001.csv'
INTO TABLE products
FIELDS TERMINATED BY ',' ENCLOSED BY '"'
LINES TERMINATED BY '\n'
IGNORE 1 LINES;

How to Migrate from Snowflake to MySQL in PostgreSQL Syntax


-- Snowflake: export to cloud storage
COPY INTO @s3_stage/<table>_
  FROM <table>
  FILE_FORMAT=(TYPE=CSV | PARQUET
               FIELD_DELIMITER=','
               HEADER=TRUE
               NULL_IF=('NULL'))
  MAX_FILE_SIZE=<bytes>
  SINGLE=FALSE;

-- MySQL: create equivalent table
CREATE TABLE <table> (
  id INT,
  ...
);

-- MySQL: bulk load
LOAD DATA LOCAL INFILE '<path>/<table>_0001.csv'
INTO TABLE <table>
FIELDS TERMINATED BY ',' ENCLOSED BY '"'
LINES TERMINATED BY '\n'
IGNORE 1 LINES (id, name, email, created_at);

Common Mistakes

Mistake: Using default FIELD_DELIMITER when Snowflake data contains commas. Fix: Specify a safe delimiter such as TAB or pipe and match it in LOAD DATA.
Mistake: Forgetting to enable LOCAL INFILE in MySQL, causing load errors. Fix: Start MySQL with --local-infile=1 and set global local_infile=1.