From 013cbf09e4ea9871311bf52b6873c43fc9be5441 Mon Sep 17 00:00:00 2001
From: Marcos Magueta <maguetamarcos@gmail.com>
Date: Tue, 24 Mar 2026 17:51:03 -0300
Subject: 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.
---
 lib/scl/ast.ml | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 lib/scl/ast.ml

(limited to 'lib/scl/ast.ml')

diff --git a/lib/scl/ast.ml b/lib/scl/ast.ml
new file mode 100644
index 0000000..043f544
--- /dev/null
+++ b/lib/scl/ast.ml
@@ -0,0 +1,7 @@
+open Sexplib.Std
+
+type statement =
+  | Begin of { query : Drl.Ast.query; limit : int option }
+  | Fetch of { cursor : string; limit : int option }
+  | Close of { cursor : string }
+[@@deriving sexp]
-- 
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