[Tarantool-patches] [PATCH v2 2/2] sql: introduce SQL built-in function UUID()

[Mergen Imeev via Tarantool-patches <tarantool-patches@dev.tarantool.org>]

This patch introduces a new SQL built-in function UUID().

Closes #5886

@TarantoolBot document
Title: SQL built-in function UUID()

SQL built-in function UUID() takes zero or one argument. If no argument
is specified, a UUID v4 is generated. If the version of the UUID to
generate is specified as an argument, the function returns the new UUID
of the given version. Currently only version 4 of UUID is supported.
---
 .../unreleased/introduce-uuid-to-sql.md       |   3 +
 src/box/bootstrap.snap                        | Bin 5991 -> 6016 bytes
 src/box/lua/upgrade.lua                       |  19 +++++++
 src/box/sql/func.c                            |  39 +++++++++++++
 src/box/sql/parse.y                           |   2 +-
 test/box-py/bootstrap.result                  |   3 +-
 test/box/access.result                        |   2 +-
 test/box/access.test.lua                      |   2 +-
 test/box/access_bin.result                    |   2 +-
 test/box/access_bin.test.lua                  |   2 +-
 test/box/access_sysview.result                |   8 +--
 test/box/function1.result                     |   6 +-
 test/sql-tap/uuid.test.lua                    |  52 +++++++++++++++++-
 test/wal_off/func_max.result                  |   8 +--
 14 files changed, 130 insertions(+), 18 deletions(-)
 create mode 100644 changelogs/unreleased/introduce-uuid-to-sql.md

diff --git a/changelogs/unreleased/introduce-uuid-to-sql.md b/changelogs/unreleased/introduce-uuid-to-sql.md
new file mode 100644
index 000000000..642ac94fb
--- /dev/null
+++ b/changelogs/unreleased/introduce-uuid-to-sql.md
@@ -0,0 +1,3 @@
+## feature/core
+
+ * Field type UUID is now available in SQL, and new UUID can be generated using new SQL built-in function uuid() (gh-5886).
diff --git a/src/box/bootstrap.snap b/src/box/bootstrap.snap
index c4a70297aad138d426a24ee4447af485e3597536..57374decc0f9de140772d9809a227e3ba4ce61eb 100644
GIT binary patch
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diff --git a/src/box/lua/upgrade.lua b/src/box/lua/upgrade.lua
index 6fba260bd..97afc0b4d 100644
--- a/src/box/lua/upgrade.lua
+++ b/src/box/lua/upgrade.lua
@@ -1000,6 +1000,24 @@ local function upgrade_to_2_7_1()
     function_access()
 end
 
+--------------------------------------------------------------------------------
+-- Tarantool 2.9.1
+--------------------------------------------------------------------------------
+local function sql_builtin_function_uuid()
+    local _func = box.space._func
+    local _priv = box.space._priv
+    local datetime = os.date("%Y-%m-%d %H:%M:%S")
+    local t = _func:auto_increment({ADMIN, 'UUID', 1, 'SQL_BUILTIN', '',
+                                    'function', {}, 'any', 'none', 'none',
+                                    false, false, true, {}, setmap({}), '',
+                                    datetime, datetime})
+    _priv:replace{ADMIN, PUBLIC, 'function', t.id, box.priv.X}
+end
+
+local function upgrade_to_2_9_1()
+    sql_builtin_function_uuid()
+end
+
 --------------------------------------------------------------------------------
 
 local handlers = {
@@ -1015,6 +1033,7 @@ local handlers = {
     {version = mkversion(2, 3, 0), func = upgrade_to_2_3_0, auto = true},
     {version = mkversion(2, 3, 1), func = upgrade_to_2_3_1, auto = true},
     {version = mkversion(2, 7, 1), func = upgrade_to_2_7_1, auto = true},
+    {version = mkversion(2, 9, 1), func = upgrade_to_2_9_1, auto = true},
 }
 
 -- Schema version of the snapshot.
diff --git a/src/box/sql/func.c b/src/box/sql/func.c
index 9c4480a92..f93ae867d 100644
--- a/src/box/sql/func.c
+++ b/src/box/sql/func.c
@@ -66,6 +66,35 @@ mem_as_bin(struct Mem *mem)
 	return s;
 }
 
+static void
+sql_func_uuid(struct sql_context *ctx, int argc, struct Mem **argv)
+{
+	if (argc > 1) {
+		diag_set(ClientError, ER_FUNC_WRONG_ARG_COUNT, "UUID",
+			 "one or zero", argc);
+		ctx->is_aborted = true;
+		return;
+	}
+	if (argc == 1) {
+		uint64_t version;
+		if (mem_get_uint(argv[0], &version) != 0) {
+			diag_set(ClientError, ER_SQL_TYPE_MISMATCH,
+				 mem_str(argv[0]), "integer");
+			ctx->is_aborted = true;
+			return;
+		}
+		if (version != 4) {
+			diag_set(ClientError, ER_UNSUPPORTED, "Function UUID",
+				 "versions other than 4");
+			ctx->is_aborted = true;
+			return;
+		}
+	}
+	struct tt_uuid uuid;
+	tt_uuid_create(&uuid);
+	mem_set_uuid(ctx->pOut, &uuid);
+}
+
 /*
  * Return the collating function associated with a function.
  */
@@ -2544,6 +2573,16 @@ static struct {
 	 .call = UpperICUFunc,
 	 .finalize = NULL,
 	 .export_to_sql = true,
+	}, {
+	 .name = "UUID",
+	 .param_count = -1,
+	 .returns = FIELD_TYPE_UUID,
+	 .aggregate = FUNC_AGGREGATE_NONE,
+	 .is_deterministic = false,
+	 .flags = 0,
+	 .call = sql_func_uuid,
+	 .finalize = NULL,
+	 .export_to_sql = true,
 	}, {
 	 .name = "VERSION",
 	 .param_count = 0,
diff --git a/src/box/sql/parse.y b/src/box/sql/parse.y
index 4c9cf475e..bd041e862 100644
--- a/src/box/sql/parse.y
+++ b/src/box/sql/parse.y
@@ -268,7 +268,7 @@ columnlist ::= tcons.
   CONFLICT DEFERRED END ENGINE FAIL
   IGNORE INITIALLY INSTEAD NO MATCH PLAN
   QUERY KEY OFFSET RAISE RELEASE REPLACE RESTRICT
-  RENAME CTIME_KW IF ENABLE DISABLE
+  RENAME CTIME_KW IF ENABLE DISABLE UUID
   .
 %wildcard ANY.
 
diff --git a/test/box-py/bootstrap.result b/test/box-py/bootstrap.result
index ed7accea3..b2328487c 100644
--- a/test/box-py/bootstrap.result
+++ b/test/box-py/bootstrap.result
@@ -4,7 +4,7 @@ box.internal.bootstrap()
 box.space._schema:select{}
 ---
 - - ['max_id', 511]
-  - ['version', 2, 7, 1]
+  - ['version', 2, 9, 1]
 ...
 box.space._cluster:select{}
 ---
@@ -242,6 +242,7 @@ box.space._priv:select{}
   - [1, 2, 'function', 65, 4]
   - [1, 2, 'function', 66, 4]
   - [1, 2, 'function', 67, 4]
+  - [1, 2, 'function', 68, 4]
   - [1, 2, 'space', 276, 2]
   - [1, 2, 'space', 277, 1]
   - [1, 2, 'space', 281, 1]
diff --git a/test/box/access.result b/test/box/access.result
index 27e636122..1a8730f1a 100644
--- a/test/box/access.result
+++ b/test/box/access.result
@@ -703,7 +703,7 @@ box.schema.func.exists(1)
 ---
 - true
 ...
-box.schema.func.exists(68)
+box.schema.func.exists(69)
 ---
 - false
 ...
diff --git a/test/box/access.test.lua b/test/box/access.test.lua
index a62f87ad8..2bf772b7b 100644
--- a/test/box/access.test.lua
+++ b/test/box/access.test.lua
@@ -282,7 +282,7 @@ box.schema.user.exists{}
 box.schema.func.exists('nosuchfunc')
 box.schema.func.exists('guest')
 box.schema.func.exists(1)
-box.schema.func.exists(68)
+box.schema.func.exists(69)
 box.schema.func.exists('box.schema.user.info')
 box.schema.func.exists()
 box.schema.func.exists(nil)
diff --git a/test/box/access_bin.result b/test/box/access_bin.result
index c58f331d3..aeb8b3bd8 100644
--- a/test/box/access_bin.result
+++ b/test/box/access_bin.result
@@ -298,7 +298,7 @@ box.schema.user.grant('guest', 'execute', 'universe')
 function f1() return box.space._func:get(1)[4] end
 ---
 ...
-function f2() return box.space._func:get(68)[4] end
+function f2() return box.space._func:get(69)[4] end
 ---
 ...
 box.schema.func.create('f1')
diff --git a/test/box/access_bin.test.lua b/test/box/access_bin.test.lua
index 41d5f4245..954266858 100644
--- a/test/box/access_bin.test.lua
+++ b/test/box/access_bin.test.lua
@@ -112,7 +112,7 @@ test:drop()
 -- notice that guest can execute stuff, but can't read space _func
 box.schema.user.grant('guest', 'execute', 'universe')
 function f1() return box.space._func:get(1)[4] end
-function f2() return box.space._func:get(68)[4] end
+function f2() return box.space._func:get(69)[4] end
 box.schema.func.create('f1')
 box.schema.func.create('f2',{setuid=true})
 c = net.connect(box.cfg.listen)
diff --git a/test/box/access_sysview.result b/test/box/access_sysview.result
index 6468a0709..d7a7b7534 100644
--- a/test/box/access_sysview.result
+++ b/test/box/access_sysview.result
@@ -258,11 +258,11 @@ box.session.su('guest')
 ...
 #box.space._vpriv:select{}
 ---
-- 82
+- 83
 ...
 #box.space._vfunc:select{}
 ---
-- 67
+- 68
 ...
 #box.space._vcollation:select{}
 ---
@@ -290,11 +290,11 @@ box.session.su('guest')
 ...
 #box.space._vpriv:select{}
 ---
-- 82
+- 83
 ...
 #box.space._vfunc:select{}
 ---
-- 67
+- 68
 ...
 #box.space._vsequence:select{}
 ---
diff --git a/test/box/function1.result b/test/box/function1.result
index 928cd5758..0166c828f 100644
--- a/test/box/function1.result
+++ b/test/box/function1.result
@@ -97,7 +97,7 @@ box.func["function1.args"]
   exports:
     lua: true
     sql: false
-  id: 68
+  id: 69
   setuid: false
   is_multikey: false
   is_deterministic: false
@@ -593,7 +593,7 @@ func
   exports:
     lua: true
     sql: false
-  id: 68
+  id: 69
   setuid: false
   is_multikey: false
   is_deterministic: false
@@ -665,7 +665,7 @@ func
   exports:
     lua: true
     sql: false
-  id: 68
+  id: 69
   setuid: false
   is_multikey: false
   is_deterministic: false
diff --git a/test/sql-tap/uuid.test.lua b/test/sql-tap/uuid.test.lua
index 4287f0921..83fcc3d0e 100755
--- a/test/sql-tap/uuid.test.lua
+++ b/test/sql-tap/uuid.test.lua
@@ -3,7 +3,7 @@ local build_path = os.getenv("BUILDDIR")
 package.cpath = build_path..'/test/sql-tap/?.so;'..build_path..'/test/sql-tap/?.dylib;'..package.cpath
 
 local test = require("sqltester")
-test:plan(139)
+test:plan(145)
 
 local uuid = require("uuid")
 local uuid1 = uuid.fromstr("11111111-1111-1111-1111-111111111111")
@@ -1266,6 +1266,56 @@ test:do_execsql_test(
         3,2,1
     })
 
+-- Check function uuid().
+test:do_execsql_test(
+    "uuid-16.1",
+    [[
+        SELECT typeof(uuid());
+    ]], {
+        "uuid"
+    })
+
+test:do_execsql_test(
+    "uuid-16.2",
+    [[
+        SELECT typeof(uuid(4));
+    ]], {
+        "uuid"
+    })
+
+test:do_catchsql_test(
+    "uuid-16.3",
+    [[
+        SELECT uuid(1);
+    ]], {
+        1, "Function UUID does not support versions other than 4"
+    })
+
+test:do_catchsql_test(
+    "uuid-16.4",
+    [[
+        SELECT uuid('asd');
+    ]], {
+        1, "Type mismatch: can not convert asd to integer"
+    })
+
+test:do_catchsql_test(
+    "uuid-16.5",
+    [[
+        SELECT uuid(4, 5);
+    ]], {
+        1, "Wrong number of arguments is passed to UUID(): expected one or zero, got 2"
+    })
+
+-- Make sure the uuid() function generates a new UUID each time when called.
+test:do_execsql_test(
+    "uuid-16.6",
+    [[
+        SELECT uuid() != uuid();
+    ]], {
+        true
+    })
+
 test:execsql([[
     DROP TRIGGER t;
     DROP VIEW v;
diff --git a/test/wal_off/func_max.result b/test/wal_off/func_max.result
index 78db38d6b..cc5bcc141 100644
--- a/test/wal_off/func_max.result
+++ b/test/wal_off/func_max.result
@@ -42,11 +42,11 @@ test_run:cmd("setopt delimiter ''");
 ...
 func_limit()
 ---
-- error: 'Failed to create function ''func31934'': function id is too big'
+- error: 'Failed to create function ''func31933'': function id is too big'
 ...
 drop_limit_func()
 ---
-- error: Function 'func31934' does not exist
+- error: Function 'func31933' does not exist
 ...
 box.schema.user.create('testuser')
 ---
@@ -62,11 +62,11 @@ session.su('testuser')
 ...
 func_limit()
 ---
-- error: 'Failed to create function ''func31934'': function id is too big'
+- error: 'Failed to create function ''func31933'': function id is too big'
 ...
 drop_limit_func()
 ---
-- error: Function 'func31934' does not exist
+- error: Function 'func31933' does not exist
 ...
 session.su('admin')
 ---
-- 
2.25.1