[tarantool-patches] [PATCH 1/2] sql: add sqlite3 msgpack result function

[Roman Khabibov <roman.habibov@tarantool.org>]

Add function like sqlite3_result_blob that sets subtype of out parameter as
SQL_SUBTYPE_MSGPACK. It allows to encode msg pack fields.

Needed for #3372
---
 src/box/sql/sqliteInt.h |  3 +++
 src/box/sql/vdbeapi.c   | 13 +++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/src/box/sql/sqliteInt.h b/src/box/sql/sqliteInt.h
index 7e16edc9a..9b4db93d3 100644
--- a/src/box/sql/sqliteInt.h
+++ b/src/box/sql/sqliteInt.h
@@ -465,6 +465,9 @@ sqlite3_value_numeric_type(sqlite3_value *);
 sqlite3 *
 sqlite3_context_db_handle(sqlite3_context *);
 
+void
+sqlite3_result_msgpack(sqlite3_context *, const void *,
+		    int, void (*)(void *));
 
 void
 sqlite3_result_blob(sqlite3_context *, const void *,
diff --git a/src/box/sql/vdbeapi.c b/src/box/sql/vdbeapi.c
index 9e57af051..ed7b67e3b 100644
--- a/src/box/sql/vdbeapi.c
+++ b/src/box/sql/vdbeapi.c
@@ -360,6 +360,19 @@ invokeValueDestructor(const void *p,	/* Value to destroy */
 	return SQLITE_TOOBIG;
 }
 
+void
+sqlite3_result_msgpack(sqlite3_context * pCtx,
+		    const void *z, int n, void (*xDel) (void *)
+    )
+{
+	assert(n >= 0);
+	if (sqlite3VdbeMemSetStr(pCtx->pOut, z, n,0, xDel) == SQLITE_TOOBIG) {
+		sqlite3_result_error_toobig(pCtx);
+	}
+	pCtx->pOut->flags|= MEM_Subtype;
+	pCtx->pOut->subtype = SQL_SUBTYPE_MSGPACK;
+}
+
 void
 sqlite3_result_blob(sqlite3_context * pCtx,
 		    const void *z, int n, void (*xDel) (void *)
-- 
2.17.1