mirror of https://github.com/pressly/goose.git
54 lines
1.6 KiB
Go
54 lines
1.6 KiB
Go
package dialectquery
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import "fmt"
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type Mysql struct{}
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var _ Querier = (*Mysql)(nil)
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func (m *Mysql) CreateTable(tableName string) string {
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q := `CREATE TABLE %s (
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id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
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version_id bigint NOT NULL,
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is_applied boolean NOT NULL,
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tstamp timestamp NULL default now(),
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PRIMARY KEY(id)
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)`
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return fmt.Sprintf(q, tableName)
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}
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func (m *Mysql) InsertVersion(tableName string) string {
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q := `INSERT INTO %s (version_id, is_applied) VALUES (?, ?)`
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return fmt.Sprintf(q, tableName)
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}
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func (m *Mysql) DeleteVersion(tableName string) string {
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q := `DELETE FROM %s WHERE version_id=?`
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return fmt.Sprintf(q, tableName)
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}
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func (m *Mysql) GetMigrationByVersion(tableName string) string {
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q := `SELECT tstamp, is_applied FROM %s WHERE version_id=? ORDER BY tstamp DESC LIMIT 1`
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return fmt.Sprintf(q, tableName)
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}
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func (m *Mysql) ListMigrations(tableName string) string {
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q := `SELECT version_id, is_applied from %s ORDER BY id DESC`
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return fmt.Sprintf(q, tableName)
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}
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func (m *Mysql) GetLatestVersion(tableName string) string {
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q := `SELECT MAX(version_id) FROM %s`
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return fmt.Sprintf(q, tableName)
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}
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func (m *Mysql) TableExists(tableName string) string {
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schemaName, tableName := parseTableIdentifier(tableName)
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if schemaName != "" {
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q := `SELECT EXISTS ( SELECT 1 FROM information_schema.tables WHERE table_schema = '%s' AND table_name = '%s' )`
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return fmt.Sprintf(q, schemaName, tableName)
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}
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q := `SELECT EXISTS ( SELECT 1 FROM information_schema.tables WHERE (database() IS NULL OR table_schema = database()) AND table_name = '%s' )`
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return fmt.Sprintf(q, tableName)
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}
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