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package bun
import (
"context"
"database/sql"
"github.com/uptrace/bun/dialect/feature"
"github.com/uptrace/bun/internal"
"github.com/uptrace/bun/schema"
)
type TruncateTableQuery struct {
baseQuery
cascadeQuery
continueIdentity bool
}
func NewTruncateTableQuery(db *DB) *TruncateTableQuery {
q := &TruncateTableQuery{
baseQuery: baseQuery{
db: db,
conn: db.DB,
},
}
return q
}
func (q *TruncateTableQuery) Conn(db IConn) *TruncateTableQuery {
q.setConn(db)
return q
}
func (q *TruncateTableQuery) Model(model interface{}) *TruncateTableQuery {
q.setTableModel(model)
return q
}
//------------------------------------------------------------------------------
func (q *TruncateTableQuery) Table(tables ...string) *TruncateTableQuery {
for _, table := range tables {
q.addTable(schema.UnsafeIdent(table))
}
return q
}
func (q *TruncateTableQuery) TableExpr(query string, args ...interface{}) *TruncateTableQuery {
q.addTable(schema.SafeQuery(query, args))
return q
}
//------------------------------------------------------------------------------
func (q *TruncateTableQuery) ContinueIdentity() *TruncateTableQuery {
q.continueIdentity = true
return q
}
func (q *TruncateTableQuery) Restrict() *TruncateTableQuery {
q.restrict = true
return q
}
//------------------------------------------------------------------------------
func (q *TruncateTableQuery) Operation() string {
return "TRUNCATE TABLE"
}
func (q *TruncateTableQuery) AppendQuery(
fmter schema.Formatter, b []byte,
) (_ []byte, err error) {
if q.err != nil {
return nil, q.err
}
if !fmter.HasFeature(feature.TableTruncate) {
b = append(b, "DELETE FROM "...)
b, err = q.appendTables(fmter, b)
if err != nil {
return nil, err
}
return b, nil
}
b = append(b, "TRUNCATE TABLE "...)
b, err = q.appendTables(fmter, b)
if err != nil {
return nil, err
}
if q.db.features.Has(feature.TableIdentity) {
if q.continueIdentity {
b = append(b, " CONTINUE IDENTITY"...)
} else {
b = append(b, " RESTART IDENTITY"...)
}
}
b = q.appendCascade(fmter, b)
return b, nil
}
//------------------------------------------------------------------------------
func (q *TruncateTableQuery) Exec(ctx context.Context, dest ...interface{}) (sql.Result, error) {
queryBytes, err := q.AppendQuery(q.db.fmter, q.db.makeQueryBytes())
if err != nil {
return nil, err
}
query := internal.String(queryBytes)
res, err := q.exec(ctx, q, query)
if err != nil {
return nil, err
}
return res, nil
}
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