Database class
Properties
-
btreeIndexes
→ Map<
String, Map< String, BTreeV2> > -
Per-table, per-column BTreeV2 instances.
These are loaded from *.btree2 files at open() and persisted at
checkpoint (step 7 — AFTER data pages, BEFORE WAL truncation).
final
- cache ↔ PageCache
-
getter/setter pair
- committedTxns → CommittedTxnsFilter
-
Committed-txn filter (O(1) visibility checks without WAL scan).
no setter
- dir → String
-
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- lockManager → LockManagerV2
-
no setter
-
mvccTables
→ Map<
String, MvccTable> -
Per-table MVCC version stores (in-memory; rebuilt from page data on open).
final
- pager ↔ Pager
-
getter/setter pair
-
pageTables
→ Map<
String, PageTable> -
New binary slotted-page tables (PageTable + DirtyPageTracker).
These are the authoritative write path once migration is complete.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- statsRegistry → StatsRegistry
-
CBO statistics registry — persisted to stats.json at each checkpoint.
final
-
tables
→ Map<
String, Table> -
Legacy JSON-page tables — kept for backward-compat with executor scans
and the BTree index layer until the binary page migration is complete.
final
- txnManager ↔ TransactionManagerV2
-
V2 transaction manager: monotonic txnIds (never 0), FIFO fair locks.
getter/setter pair
- wal ↔ Wal
-
getter/setter pair
Methods
-
abortTxn(
TxnContextV2 ctx) → void - Abort (rollback). MVCC undo is implicit via xmin visibility.
-
analyze(
String tableName) → Future< void> -
analyzeAll(
) → Future< void> -
autoCommitDone(
TxnContextV2 ctx) → void - Must be called after autoCommitRead finishes to release resources.
-
autoCommitRead(
) → TxnContextV2 - Autocommit read: allocates a transient read-only TxnContextV2.
-
beginTxn(
{bool readOnly = false}) → TxnContextV2 - Begin a new MVCC transaction. Returns a TxnContextV2.
-
btreeDelete(
String table, String column, dynamic key, int rowId) → void - Delete a key from a column's binary B+Tree index.
-
btreeInsert(
String table, String column, dynamic key, int rowId) → void - Insert a value into a column's binary B+Tree index.
-
btreeLookup(
String table, String column, dynamic key) → List< int> - Lookup a key in a column's binary B+Tree index.
-
checkpoint(
) → Future< void> -
close(
) → Future< void> -
commitTxn(
TxnContextV2 ctx) → void - Commit. The WAL commit record MUST be written before calling this.
-
createTable(
String name, Schema schema) → Future< Table> -
dropTable(
String name) → Future< void> -
getTable(
String name) → Table? -
mvccTableFor(
String name) → MvccTable -
Get or create the MvccTable for
name. -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
rollback(
) → Future< void> -
saveSnapshot(
) → Future< void> -
toString(
) → String -
A string representation of this object.
inherited
-
vacuum(
) → Future< void> -
walAppend(
WalOp op, String table, Map< String, dynamic> payload, {int? txnId}) → Future<int>
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited