quill-sql 0.2.0

A tiny yet serious SQL database in Rust with ARIES-style WAL, 2PL, and B+Tree indexes.
Documentation 
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use crate::recovery::wal::codec;
use crate::recovery::Lsn;

pub use crate::recovery::wal::codec::{
    decode_checkpoint, decode_clr, decode_frame, decode_page_delta, decode_page_write,
    decode_payload as decode_wal_payload, decode_transaction, encode_frame,
    heap_record_kind_to_info, CheckpointPayload, ClrPayload, PageDeltaPayload, PageWritePayload,
    ResourceManagerId, TransactionPayload, TransactionRecordKind, WalFrame, WAL_CRC_LEN,
    WAL_HEADER_LEN, WAL_MAGIC, WAL_VERSION, WAL_VERSION_V1,
};

pub use crate::storage::heap::wal_codec::{
    decode_heap_record as decode_heap, encode_heap_record as encode_heap, HeapDeletePayload,
    HeapInsertPayload, HeapRecordKind, HeapRecordPayload, HeapUpdatePayload, RelationIdent,
    TupleMetaRepr,
};

#[derive(Debug, Clone)]
pub enum WalRecordPayload {
    PageWrite(PageWritePayload),
    /// Apply a byte-range delta to a page (physiological logging)
    PageDelta(PageDeltaPayload),
    Transaction(TransactionPayload),
    Heap(HeapRecordPayload),
    Checkpoint(CheckpointPayload),
    /// Compensation log record: documents an UNDO action; redo is a no-op.
    Clr(ClrPayload),
}

impl WalRecordPayload {
    pub fn encode(&self, lsn: Lsn, prev_lsn: Lsn) -> Vec<u8> {
        codec::encode_frame(lsn, prev_lsn, self)
    }
}