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path: root/tests/functional/limit/acudego.go
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package acudego

import (
	"database/sql"
	"fmt"
	"log"
	"os"
	"strings"
)



func createBulkInsertQuery(n int, start int) (string, []any) {
	values := make([]string, n)
	args   := make([]any, n*2)
	pos := 0
	for i := 0; i < n; i++ {
		values[i] = "(?, ?)"
		args[pos] = start + i
		args[pos+1] = fmt.Sprintf("こんにちは世界%03d", i)
		pos += 2
	}
	query := fmt.Sprintf(
		"insert into mylimittable(id, name) values %s",
		strings.Join(values, ", "),
	)
	return query, args
}

func bulkInsert(db *sql.DB, query string, args []any) error {
	stmt, err := db.Prepare(query)
	if err != nil {
		return err
	}

	_, err = stmt.Exec(args...)
	return err
}



func MainTest() {
	const (
		num        = 400
		smallLimit = 100
		bigLimit   = 999999
	)

	const SQL = `
		create table mylimittable (id integer not null primary key, name text);
		delete from mylimittable;
	`

	var conn *SQLiteConn
	sql.Register("sqlite3_with_limit", &SQLiteDriver{
		ConnectHook: func(c *SQLiteConn) error {
			conn = c
			return nil
		},
	})

	os.Remove("limit.db")
	defer os.Remove("limit.db")
	db, err := sql.Open("sqlite3_with_limit", "limit.db")
	if err != nil {
		log.Fatal(err)
	}
	defer db.Close()

	_, err = db.Exec(SQL)
	if err != nil {
		log.Fatal(err)
	}

	if conn == nil {
		log.Fatal("not set sqlite3 connection")
	}

	{
		query, args := createBulkInsertQuery(num, 0)
		err := bulkInsert(db, query, args)
		if err != nil {
			log.Fatal(err)
		}
	}

	conn.SetLimit(SQLITE_LIMIT_VARIABLE_NUMBER, smallLimit)
	{
		query, args := createBulkInsertQuery(num, num)
		err := bulkInsert(db, query, args)
		if err == nil {
			log.Fatal("expected failure didn't happen")
		}
	}

	conn.SetLimit(SQLITE_LIMIT_VARIABLE_NUMBER, bigLimit)
	{
		query, args := createBulkInsertQuery(500, num+num)
		err := bulkInsert(db, query, args)
		if err != nil {
			log.Fatal(err)
		}
	}
}