[Tarantool-patches] [PATCH] sql: fix assertion fail when selecting from _vfunc

[Chris Sosnin <k.sosnin@tarantool.org>]

The assertion mentioned #4666 fails because it was forgotten to update
_vfunc format along with _func in 2.2.1. This leads to bad allocation
of vdbe cursor and setting wrong memory to 0.

Closes #4666
---
branch: https://github.com/tarantool/tarantool/tree/ksosnin/gh-4666-select-from-vfunc
issue: https://github.com/tarantool/tarantool/issues/4666

 src/box/bootstrap.snap                        | Bin 5921 -> 5916 bytes
 src/box/lua/upgrade.lua                       |   7 +++++++
 test/box-py/bootstrap.result                  |   9 ++++++++-
 test/sql/gh-4666-sql-select-from-vfunc.result |  19 ++++++++++++++++++
 .../gh-4666-sql-select-from-vfunc.test.lua    |   7 +++++++
 5 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 test/sql/gh-4666-sql-select-from-vfunc.result
 create mode 100644 test/sql/gh-4666-sql-select-from-vfunc.test.lua

diff --git a/src/box/lua/upgrade.lua b/src/box/lua/upgrade.lua
index 07f1e0317..e57c23547 100644
--- a/src/box/lua/upgrade.lua
+++ b/src/box/lua/upgrade.lua
@@ -951,8 +951,15 @@ local function drop_func_collation()
     _func.index.name:alter({parts = {{'name', 'string'}}})
 end

+local function update_vfunc_format()
+    local _func = box.space[box.schema.FUNC_ID]
+    local _vfunc = box.space[box.schema.VFUNC_ID]
+    _vfunc:format(_func:format())
+end
+
 local function upgrade_to_2_3_1()
     drop_func_collation()
+    update_vfunc_format()
 end

 --------------------------------------------------------------------------------
diff --git a/test/box-py/bootstrap.result b/test/box-py/bootstrap.result
index 938a7631e..56bb43872 100644
--- a/test/box-py/bootstrap.result
+++ b/test/box-py/bootstrap.result
@@ -63,7 +63,14 @@ box.space._space:select{}
         'type': 'string'}, {'name': 'last_altered', 'type': 'string'}]]
   - [297, 1, '_vfunc', 'sysview', 0, {}, [{'name': 'id', 'type': 'unsigned'}, {'name': 'owner',
         'type': 'unsigned'}, {'name': 'name', 'type': 'string'}, {'name': 'setuid',
-        'type': 'unsigned'}]]
+        'type': 'unsigned'}, {'name': 'language', 'type': 'string'}, {'name': 'body',
+        'type': 'string'}, {'name': 'routine_type', 'type': 'string'}, {'name': 'param_list',
+        'type': 'array'}, {'name': 'returns', 'type': 'string'}, {'name': 'aggregate',
+        'type': 'string'}, {'name': 'sql_data_access', 'type': 'string'}, {'name': 'is_deterministic',
+        'type': 'boolean'}, {'name': 'is_sandboxed', 'type': 'boolean'}, {'name': 'is_null_call',
+        'type': 'boolean'}, {'name': 'exports', 'type': 'array'}, {'name': 'opts',
+        'type': 'map'}, {'name': 'comment', 'type': 'string'}, {'name': 'created',
+        'type': 'string'}, {'name': 'last_altered', 'type': 'string'}]]
   - [304, 1, '_user', 'memtx', 0, {}, [{'name': 'id', 'type': 'unsigned'}, {'name': 'owner',
         'type': 'unsigned'}, {'name': 'name', 'type': 'string'}, {'name': 'type',
         'type': 'string'}, {'name': 'auth', 'type': 'map'}]]
diff --git a/test/sql/gh-4666-sql-select-from-vfunc.result b/test/sql/gh-4666-sql-select-from-vfunc.result
new file mode 100644
index 000000000..16876e740
--- /dev/null
+++ b/test/sql/gh-4666-sql-select-from-vfunc.result
@@ -0,0 +1,19 @@
+test_run = require('test_run').new()
+---
+...
+engine = test_run:get_cfg('engine')
+---
+...
+box.execute('pragma sql_default_engine=\''..engine..'\'')
+---
+- row_count: 0
+...
+-- Make sure assertion does not fail
+box.execute([[select count(*)&0 from "_vfunc";]])
+---
+- metadata:
+  - name: count(*)&0
+    type: integer
+  rows:
+  - [0]
+...
diff --git a/test/sql/gh-4666-sql-select-from-vfunc.test.lua b/test/sql/gh-4666-sql-select-from-vfunc.test.lua
new file mode 100644
index 000000000..be227d119
--- /dev/null
+++ b/test/sql/gh-4666-sql-select-from-vfunc.test.lua
@@ -0,0 +1,7 @@
+test_run = require('test_run').new()
+engine = test_run:get_cfg('engine')
+box.execute('pragma sql_default_engine=\''..engine..'\'')
+
+-- Make sure assertion does not fail
+
+box.execute([[select count(*)&0 from "_vfunc";]])
--
2.21.0 (Apple Git-122.2)