sql: replace schema_find_id() by box_space_id_by_name()

This patch replaces schema_find_id() with box_space_id_by_name()
in SQL. The box_space_id_by_name() is more specialized. In
addition, it checks if the user has sufficient rights, unlike
schema_find_id().

Closes #3570

src/box/sql/trigger.c

@@ -38,6 +38,7 @@
 #include "tarantoolInt.h"
 #include "vdbeInt.h"
 #include "box/session.h"
+#include "box/box.h"
 
 /* See comment in sqlInt.h */
 int sqlSubProgramsRemaining;
@@ -87,10 +88,8 @@ sql_trigger_begin(struct Parse *parse)
 		goto trigger_cleanup;
 
 	const char *table_name = alter_def->entity_name->a[0].zName;
-	uint32_t space_id;
-	if (schema_find_id(BOX_SPACE_ID, 2, table_name, strlen(table_name),
-			   &space_id) != 0)
-		goto set_tarantool_error_and_cleanup;
+	uint32_t space_id = box_space_id_by_name(table_name,
+						 strlen(table_name));
 	if (space_id == BOX_ID_NIL) {
 		diag_set(ClientError, ER_NO_SUCH_SPACE, table_name);
 		goto set_tarantool_error_and_cleanup;

test/sql/triggers.result

@@ -512,3 +512,39 @@ box.execute("DROP TABLE t1;")
 ---
 - row_count: 1
 ...
+--
+-- gh-3570: Use box_space_id_by_name() instead of schema_find_id()
+-- in SQL
+--
+box.schema.user.create('tester')
+---
+...
+box.schema.user.grant('tester','read,write,create,execute', 'space', '_trigger')
+---
+...
+box.execute("CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT);")
+---
+- row_count: 1
+...
+box.session.su('tester')
+---
+...
+--
+-- Ensure that the CREATE TRIGGER statement cannot be executed if
+-- the user does not have enough rights. In this case, the user
+-- does not have rights to read from _space.
+--
+box.execute([[CREATE TRIGGER r1 AFTER INSERT ON t1 FOR EACH ROW BEGIN SELECT 1; END; ]])
+---
+- error: Space 'T1' does not exist
+...
+box.session.su('admin')
+---
+...
+box.schema.user.drop('tester')
+---
+...
+box.execute("DROP TABLE t1;")
+---
+- row_count: 1
+...

test/sql/triggers.test.lua

@@ -173,3 +173,21 @@ box.execute("CREATE TABLE t1(a INT PRIMARY KEY, b INT);")
 space_id = box.space.T1.id
 box.execute("CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN ; END;")
 box.execute("DROP TABLE t1;")
+
+--
+-- gh-3570: Use box_space_id_by_name() instead of schema_find_id()
+-- in SQL
+--
+box.schema.user.create('tester')
+box.schema.user.grant('tester','read,write,create,execute', 'space', '_trigger')
+box.execute("CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT);")
+box.session.su('tester')
+--
+-- Ensure that the CREATE TRIGGER statement cannot be executed if
+-- the user does not have enough rights. In this case, the user
+-- does not have rights to read from _space.
+--
+box.execute([[CREATE TRIGGER r1 AFTER INSERT ON t1 FOR EACH ROW BEGIN SELECT 1; END; ]])
+box.session.su('admin')
+box.schema.user.drop('tester')
+box.execute("DROP TABLE t1;")