package granary

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Pure-OCaml SQL engine

Install 

dune-project
 Dependency

github.com Edit opam file Versions (1)

Authors

  1. T
    Tej Pochiraju <foss@tej.sh>

Maintainers

  1. T
    Tej Pochiraju <foss@tej.sh>

Sources

0.0.3.tar.gz
sha256=8b18780ea373be48301d9f333925860a2f9110fc0ac28684295118d72b65a67e
sha512=25ca3c9c5e2b528704a542502e0f37dc33ba003f65622d969b8c2b800778585f8ef0cf89b36e6679832e3993e8303aecddfc662742baf7044d6afe4a796b8f11

doc/src/granary.store/store_event.ml.html

Source file store_event.ml

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type t =
  | Txn_begin of { txn_id : int64 }
  | Txn_commit of
      { txn_id : int64
      ; frames : int
      }
  | Txn_rollback of { txn_id : int64 }
  | Savepoint_begin of
      { txn_id : int64
      ; name : string
      }
  | Savepoint_release of
      { txn_id : int64
      ; name : string
      }
  | Savepoint_rollback of
      { txn_id : int64
      ; name : string
      }
  | Wal_append of
      { txn_id : int64
      ; base_idx : int
      ; count : int
      }
  | Wal_reset of { epoch : int64 }
  | Checkpoint_begin of { target_frames : int }
  | Checkpoint_end of { pages_migrated : int }
  | Page_read of
      { txn_id : int64
      ; tree : int
      ; page : int64
      }
  | Wal_read of
      { txn_id : int64
      ; tree : int
      ; page : int64
      }
  | Page_write of
      { txn_id : int64
      ; tree : int
      ; page : int64
      }
  | Page_alloc of
      { txn_id : int64
      ; tree : int
      ; page : int64
      ; reused : bool
      }
  | Page_free of
      { txn_id : int64
      ; tree : int
      ; page : int64
      }

let label = function
  | Txn_begin _ -> "BEGIN"
  | Txn_commit _ -> "COMMIT"
  | Txn_rollback _ -> "ROLLBACK"
  | Savepoint_begin _ -> "SP_BEGIN"
  | Savepoint_release _ -> "SP_RELEASE"
  | Savepoint_rollback _ -> "SP_ROLLBACK"
  | Wal_append _ -> "WAL_APPEND"
  | Wal_reset _ -> "WAL_RESET"
  | Checkpoint_begin _ -> "CKPT_BEGIN"
  | Checkpoint_end _ -> "CKPT_END"
  | Page_read _ -> "PAGE_READ"
  | Wal_read _ -> "WAL_READ"
  | Page_write _ -> "PAGE_WRITE"
  | Page_alloc _ -> "PAGE_ALLOC"
  | Page_free _ -> "PAGE_FREE"
;;

let txn_id = function
  | Txn_begin { txn_id }
  | Txn_commit { txn_id; _ }
  | Txn_rollback { txn_id }
  | Savepoint_begin { txn_id; _ }
  | Savepoint_release { txn_id; _ }
  | Savepoint_rollback { txn_id; _ }
  | Wal_append { txn_id; _ }
  | Page_read { txn_id; _ }
  | Wal_read { txn_id; _ }
  | Page_write { txn_id; _ }
  | Page_alloc { txn_id; _ }
  | Page_free { txn_id; _ } -> Some txn_id
  | Wal_reset _ | Checkpoint_begin _ | Checkpoint_end _ -> None
;;

let tree_id_of = function
  | Page_read { tree; _ }
  | Wal_read { tree; _ }
  | Page_write { tree; _ }
  | Page_alloc { tree; _ }
  | Page_free { tree; _ } -> Some tree
  | _ -> None
;;

let pp fmt ev =
  let tag = label ev in
  match ev with
  | Txn_begin { txn_id } | Txn_rollback { txn_id } ->
    Format.fprintf fmt "%s txn=%Ld" tag txn_id
  | Txn_commit { txn_id; frames } ->
    Format.fprintf fmt "%s txn=%Ld frames=%d" tag txn_id frames
  | Savepoint_begin { txn_id; name }
  | Savepoint_release { txn_id; name }
  | Savepoint_rollback { txn_id; name } ->
    Format.fprintf fmt "%s txn=%Ld name=%s" tag txn_id name
  | Wal_append { txn_id; base_idx; count } ->
    Format.fprintf fmt "%s txn=%Ld base=%d count=%d" tag txn_id base_idx count
  | Wal_reset { epoch } -> Format.fprintf fmt "%s epoch=%Ld" tag epoch
  | Checkpoint_begin { target_frames } ->
    Format.fprintf fmt "%s target=%d" tag target_frames
  | Checkpoint_end { pages_migrated } ->
    Format.fprintf fmt "%s migrated=%d" tag pages_migrated
  | Page_read { txn_id; tree; page } | Wal_read { txn_id; tree; page } ->
    Format.fprintf fmt "%s txn=%Ld tree=%d page=%Ld" tag txn_id tree page
  | Page_write { txn_id; tree; page } ->
    Format.fprintf fmt "%s txn=%Ld tree=%d page=%Ld" tag txn_id tree page
  | Page_alloc { txn_id; tree; page; reused } ->
    Format.fprintf fmt "%s txn=%Ld tree=%d page=%Ld reused=%b" tag txn_id tree page reused
  | Page_free { txn_id; tree; page } ->
    Format.fprintf fmt "%s txn=%Ld tree=%d page=%Ld" tag txn_id tree page
;;