upstream-sqlc/docs/howto/structs.md

Configuring generated structs

Naming scheme

Structs generated from tables will attempt to use the singular form of a table name if the table name is pluralized.

CREATE TABLE authors (
  id   SERIAL PRIMARY KEY,
  name text   NOT NULL
);

package db

// Struct names use the singular form of table names
type Author struct {
	ID   int
	Name string
}

JSON tags

CREATE TABLE authors (
  id         SERIAL    PRIMARY KEY,
  created_at timestamp NOT NULL
);

sqlc can generate structs with JSON tags by adding the emit_json_tags key to the configuration file as it shows on configuration reference. The JSON name for a field matches the column name in the database.

package db

import (
	"time"
)

type Author struct {
	ID        int       `json:"id"`
	CreatedAt time.Time `json:"created_at"`
}

More control

See the guide to Overriding types for fine-grained control over struct field types and tags.