sql-to-go

Convert MySQL CREATE TABLE statements to Go structs with form, json, and xorm tags. Use when converting SQL DDL to Go struct definitions, generating ORM models from database schemas, or creating Go types from MySQL tables. Supports MySQL data type mapping, snake_case to CamelCase conversion, and automatic tag generation.

SQL to Go Struct

Quick Start

Convert a MySQL CREATE TABLE statement to a Go struct with tags:

1. Parse the CREATE TABLE statement to extract table name, columns, and constraints
2. Map each MySQL column type to corresponding Go type
3. Convert snake_case column names to CamelCase field names
4. Generate struct with form, json, and xorm tags

Type Mapping

For complete MySQL to Go type mappings, see type_mappings.md.

Quick Reference

MySQL	Go	Notes
INT	int
BIGINT	int64
VARCHAR	string
TEXT	string
DATETIME	time.Time
TIMESTAMP	time.Time
BOOL / BIT(1)	bool
DECIMAL	float64	Or custom type

Column Name Conversion

Convert snake_case to CamelCase:

user_name    → UserName
created_at   → CreatedAt
user_id      → UserID
api_key      → APIKey
is_active    → IsActive

Special cases - acronyms remain uppercase:

• id → ID
• url → URL
• uri → URI

Tag Generation

Generate three tags for each field:

• form: HTTP form parameter name (snake_case)
• json: JSON field name (snake_case)
• xorm: XORM ORM column name and constraints

XORM Tag Patterns

Constraint	Tag
Primary key	xorm:"pk"
Auto increment	xorm:"autoincr"
Not null	xorm:"not null"
Unique	xorm:"unique"
Default value	xorm:"default 'value'"
Nullable	xorm:"nullable"
Index	xorm:"index"
Comment	xorm:"comment 'text'"

Combine constraints: xorm:"'user_id' pk autoincr"

Example

Input

CREATE TABLE users (
    id BIGINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL UNIQUE,
    email VARCHAR(100) NOT NULL,
    age INT DEFAULT 0,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    is_active BOOLEAN DEFAULT TRUE,
    bio TEXT
) COMMENT='User table';

Output

package models

import "time"

// User represents the users table
type User struct {
    ID        uint64    `form:"id" json:"id" xorm:"'id' pk autoincr"`
    Username  string    `form:"username" json:"username" xorm:"'username' unique not null"`
    Email     string    `form:"email" json:"email" xorm:"'email' not null"`
    Age       int       `form:"age" json:"age" xorm:"'age' default 0"`
    CreatedAt time.Time `form:"created_at" json:"created_at" xorm:"'created_at'"`
    IsActive  bool      `form:"is_active" json:"is_active" xorm:"'is_active' default true"`
    Bio       string    `form:"bio" json:"bio" xorm:"'bio'"`
}

Workflow

1. Extract table info: Get table name, column definitions, constraints
2. Apply type mappings: See type_mappings.md for reference
3. Generate field name: Convert snake_case column to CamelCase
4. Add tags: Generate form/json/xorm tags based on column attributes
5. Handle special cases: Primary keys, indexes, defaults, comments

Nullable Columns

For nullable columns (allows NULL), use pointer types:

// MySQL: phone VARCHAR(20) NULL
Phone *string `form:"phone" json:"phone" xorm:"'phone' nullable"`

Struct Comment

Use table comment as struct comment, or generate from table name:

// User represents the users table