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authorMarcos Magueta <maguetamarcos@gmail.com>2026-03-24 17:51:03 -0300
committerGitHub <noreply@github.com>2026-03-24 17:51:03 -0300
commit013cbf09e4ea9871311bf52b6873c43fc9be5441 (patch)
tree1a7fd541c215fadb4e18c5cda551bb2b707bdc8b /lib/sublanguage.ml
parenta98fad877fa9ddacb32898b01e23d588f8df04aa (diff)
downloadSakura-013cbf09e4ea9871311bf52b6873c43fc9be5441.tar.gz
Sakura-013cbf09e4ea9871311bf52b6873c43fc9be5441.zip
Session with stream control sublanguage (#55)
SCL adds cursor-based streaming to Sakura so clients can consume DRL query results incrementally in bounded batches rather than all at once. Three statements: Begin, Fetch, and Close. `open`, `advance`, and `release` cursors backed by a session registry that suspends the generator between calls. SCL is just an optional consumption layer above the existing algebra.
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-rw-r--r--lib/sublanguage.ml7
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/sublanguage.ml b/lib/sublanguage.ml
index 3df91f1..d92358e 100644
--- a/lib/sublanguage.ml
+++ b/lib/sublanguage.ml
@@ -14,9 +14,16 @@
(Turing-complete; breaks the termination guarantee of DRL)
- ACL -> a functor restriction: narrows the admissible natural
transformations based on authorization context *)
+type cursor_result = {
+ cursor_id : string;
+ rows : Tuple.materialized list;
+ has_more : bool;
+}
+
type result =
| Query of Relation.t
| Transition of Management.Database.t * string
+ | Cursor of cursor_result
module type S = sig
type storage