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