[PATCH v4 6/6] box: introduce Lua persistent functions

[Vladimir Davydov]

On Sun, Jun 23, 2019 at 04:57:57PM +0300, Kirill Shcherbatov wrote:
> diff --git a/src/box/lua/call.c b/src/box/lua/call.c
> index f98ab42ac..d3d874477 100644
> --- a/src/box/lua/call.c
> +++ b/src/box/lua/call.c
> @@ -669,6 +870,22 @@ lbox_func_new(struct lua_State *L, struct func *func)
>  	lua_pushstring(L, "language");
>  	lua_pushstring(L, func_language_strs[func->def->language]);
>  	lua_settable(L, top);
> +	lua_pushstring(L, "is_deterministic");
> +	lua_pushboolean(L, func->def->is_deterministic);
> +	lua_settable(L, top);
> +	if (func->def->body != NULL) {
> +		lua_pushstring(L, "body");
> +		lua_pushstring(L, func->def->body);
> +		lua_settable(L, top);
> +		lua_pushstring(L, "is_sandboxed");
> +		lua_pushboolean(L, func->def->is_sandboxed);
> +		lua_settable(L, top);
> +	}
> +	if (func->def->comment != NULL) {
> +		lua_pushstring(L, "comment");
> +		lua_pushstring(L, func->def->comment);
> +		lua_settable(L, top);
> +	}

We must delete 'body' and 'is_sandboxed' in case the function isn't
persistent, otherwise it might inherit old values.

> diff --git a/src/box/lua/schema.lua b/src/box/lua/schema.lua
> index 9c3ee063c..455d1e18a 100644
> --- a/src/box/lua/schema.lua
> +++ b/src/box/lua/schema.lua
> @@ -2138,7 +2138,10 @@ box.schema.func.create = function(name, opts)
>      opts = opts or {}
>      check_param_table(opts, { setuid = 'boolean',
>                                if_not_exists = 'boolean',
> -                              language = 'string'})
> +                              language = 'string', body = 'string',
> +                              is_deterministic = 'boolean',
> +                              is_sandboxed = 'boolean', opts = 'table',

opts = 'table' not needed, apparently.

Pushed to master with the following changes:

diff --git a/src/box/lua/call.c b/src/box/lua/call.c
index d50e23bf..88110c43 100644
--- a/src/box/lua/call.c
+++ b/src/box/lua/call.c
@@ -868,22 +868,27 @@ lbox_func_new(struct lua_State *L, struct func *func)
 	lua_pushstring(L, "language");
 	lua_pushstring(L, func_language_strs[func->def->language]);
 	lua_settable(L, top);
+	lua_pushstring(L, "body");
+	if (func->def->body != NULL)
+		lua_pushstring(L, func->def->body);
+	else
+		lua_pushnil(L);
+	lua_settable(L, top);
+	lua_pushstring(L, "comment");
+	if (func->def->comment != NULL)
+		lua_pushstring(L, func->def->comment);
+	else
+		lua_pushnil(L);
+	lua_settable(L, top);
 	lua_pushstring(L, "is_deterministic");
 	lua_pushboolean(L, func->def->is_deterministic);
 	lua_settable(L, top);
-	if (func->def->body != NULL) {
-		lua_pushstring(L, "body");
-		lua_pushstring(L, func->def->body);
-		lua_settable(L, top);
-		lua_pushstring(L, "is_sandboxed");
+	lua_pushstring(L, "is_sandboxed");
+	if (func->def->body != NULL)
 		lua_pushboolean(L, func->def->is_sandboxed);
-		lua_settable(L, top);
-	}
-	if (func->def->comment != NULL) {
-		lua_pushstring(L, "comment");
-		lua_pushstring(L, func->def->comment);
-		lua_settable(L, top);
-	}
+	else
+		lua_pushnil(L);
+	lua_settable(L, top);
 
 	/* Bless func object. */
 	lua_getfield(L, LUA_GLOBALSINDEX, "box");
diff --git a/src/box/lua/schema.lua b/src/box/lua/schema.lua
index 455d1e18..1ab97440 100644
--- a/src/box/lua/schema.lua
+++ b/src/box/lua/schema.lua
@@ -2140,8 +2140,8 @@ box.schema.func.create = function(name, opts)
                               if_not_exists = 'boolean',
                               language = 'string', body = 'string',
                               is_deterministic = 'boolean',
-                              is_sandboxed = 'boolean', opts = 'table',
-                              comment = 'string'})
+                              is_sandboxed = 'boolean',
+                              comment = 'string' })
     local _func = box.space[box.schema.FUNC_ID]
     local _vfunc = box.space[box.schema.VFUNC_ID]
     local func = _vfunc.index.name:get{name}
diff --git a/test/box/function1.result b/test/box/function1.result
index 969798ea..7bea2d64 100644
--- a/test/box/function1.result
+++ b/test/box/function1.result
@@ -448,7 +448,6 @@ func
 - is_deterministic: false
   id: 2
   setuid: false
-  comment: Divide two values
   name: function1.divide
   language: C
 ...