1package dialectquery
 2
 3import "fmt"
 4
 5type Clickhouse struct{}
 6
 7var _ Querier = (*Clickhouse)(nil)
 8
 9func (c *Clickhouse) CreateTable(tableName string) string {
10	q := `CREATE TABLE IF NOT EXISTS %s (
11		version_id Int64,
12		is_applied UInt8,
13		date Date default now(),
14		tstamp DateTime default now()
15	  )
16	  ENGINE = MergeTree()
17		ORDER BY (date)`
18	return fmt.Sprintf(q, tableName)
19}
20
21func (c *Clickhouse) InsertVersion(tableName string) string {
22	q := `INSERT INTO %s (version_id, is_applied) VALUES ($1, $2)`
23	return fmt.Sprintf(q, tableName)
24}
25
26func (c *Clickhouse) DeleteVersion(tableName string) string {
27	q := `ALTER TABLE %s DELETE WHERE version_id = $1 SETTINGS mutations_sync = 2`
28	return fmt.Sprintf(q, tableName)
29}
30
31func (c *Clickhouse) GetMigrationByVersion(tableName string) string {
32	q := `SELECT tstamp, is_applied FROM %s WHERE version_id = $1 ORDER BY tstamp DESC LIMIT 1`
33	return fmt.Sprintf(q, tableName)
34}
35
36func (c *Clickhouse) ListMigrations(tableName string) string {
37	q := `SELECT version_id, is_applied FROM %s ORDER BY version_id DESC`
38	return fmt.Sprintf(q, tableName)
39}
40
41func (c *Clickhouse) GetLatestVersion(tableName string) string {
42	q := `SELECT max(version_id) FROM %s`
43	return fmt.Sprintf(q, tableName)
44}