Method AddUnchangedKeyForLock

pkg/sessionctx/variable/session.go:325–332

AddUnchangedKeyForLock adds an unchanged key for pessimistic lock.

(key []byte, shared bool)

// AddUnchangedKeyForLock adds an unchanged key for pessimistic lock.
func (tc *TransactionContext) AddUnchangedKeyForLock(key []byte, shared bool) {
	if tc.unchangedKeys == nil {
		tc.unchangedKeys = map[string]bool{}
	}
	k := string(key)
	alreadyShared, exist := tc.unchangedKeys[k]
	tc.unchangedKeys[k] = shared && (!exist || (exist && alreadyShared))
}

// CollectUnchangedKeysForXLock collects unchanged keys for pessimistic lock.
func (tc *TransactionContext) CollectUnchangedKeysForXLock(buf []kv.Key) []kv.Key {