pgx CopyFrom codegen uses parameter names instead of column names when using named parameters #2833

Version

1.22.0

What happened?

When using named parameters in your insert statement (@param_name or sqlc.arg(param_name)) the parameter name is used in the pgx CopyFrom method instead of the column name.

In the playground example below, the copyfrom codegen is:

func (q *Queries) StageUserData(ctx context.Context, arg []StageUserDataParams) (int64, error) {
	return q.db.CopyFrom(ctx, []string{"user_data"}, []string{"id_parameter", "user_parameter"}, &iteratorForStageUserData{rows: arg})
}

but it should be

func (q *Queries) StageUserData(ctx context.Context, arg []StageUserDataParams) (int64, error) {
	return q.db.CopyFrom(ctx, []string{"user_data"}, []string{"id", "user"}, &iteratorForStageUserData{rows: arg})
}

Relevant log output

No response

Database schema

create table "user_data" (
	"id" varchar not null,
	"user" varchar not null,
	primary key ("id")
);

SQL queries

-- name: StageUserData :copyfrom
insert into "user_data" ("id", "user")
values (sqlc.arg(id_parameter), sqlc.arg(user_parameter));

Configuration

{
  "version": "2",
  "sql": [
    {
      "engine": "postgresql",
      "schema": "query.sql",
      "queries": "query.sql",
      "gen": {
        "go": {
          "package": "models",
          "sql_package": "pgx/v5",
          "out": "models"
        }
      }
    }
  ]
}

Playground URL

https://play.sqlc.dev/p/5e51915801b5b50a2d8836be41b4cc0503b5ce04e7c7a1e9efa6a12d719c7589

What operating system are you using?

macOS

What database engines are you using?

PostgreSQL

What type of code are you generating?

Go