errors

var (
	// ErrTransactionConflict aliases the storage conflict sentinel used when an
	// optimistic transaction observes data changed after its snapshot.
	ErrTransactionConflict = storage.ErrConflict
	// ErrMVCCResourcePressure aliases the storage admission sentinel used when a
	// snapshot cannot be kept alive under current MVCC pressure.
	ErrMVCCResourcePressure = storage.ErrMVCCResourcePressure
	// ErrMVCCSnapshotGracefulCancel aliases the storage sentinel for snapshots
	// cancelled during high MVCC pressure.
	ErrMVCCSnapshotGracefulCancel = storage.ErrMVCCSnapshotGracefulCancel
	// ErrMVCCSnapshotHardExpired aliases the storage sentinel for snapshots
	// forcibly expired during critical MVCC pressure.
	ErrMVCCSnapshotHardExpired = storage.ErrMVCCSnapshotHardExpired
	// ErrTransactionDeadlock marks lock-ordering deadlocks that drivers should
	// retry as Neo4j-compatible transient transaction failures.
	ErrTransactionDeadlock = stderrors.New("transaction deadlock")
	// ErrMergeCommitTimeUniqueConflict marks a commit-time UNIQUE violation from
	// a concurrent MERGE race. Retry-aware clients can safely replay because the
	// winner's committed node will be observed on the next attempt.
	ErrMergeCommitTimeUniqueConflict = stderrors.New("merge commit-time unique conflict")
	// Procedure catalog lifecycle errors.
	ErrProcedureCatalogReadFailed         = stderrors.New("cypher: procedure catalog read failed")
	ErrProcedureCatalogRecordDecodeFailed = stderrors.New("cypher: procedure catalog record decode failed")
	ErrProcedureCatalogRecordInvalid      = stderrors.New("cypher: procedure catalog record invalid")
	ErrProcedureRegistryReloadFailed      = stderrors.New("cypher: procedure registry reload failed")

	// DDL parse/validation errors.
	ErrInvalidFulltextRelationshipTypes = stderrors.New("cypher: invalid fulltext relationship types")
	ErrInvalidMergeChainQuery           = stderrors.New("cypher: invalid merge chain query")
	// ErrExpressionEvaluationFailed marks expression-evaluation failures that must
	// surface to callers instead of being treated as literal fallback values.
	ErrExpressionEvaluationFailed = stderrors.New("cypher: expression evaluation failed")
)