I'm sorry have just noticed few mistakes.
Changed it:


diff --git a/src/box/sql/build.c b/src/box/sql/build.c
index 92f3cb6..c6185e4 100644
--- a/src/box/sql/build.c
+++ b/src/box/sql/build.c
@@ -2129,18 +2129,36 @@ sqliteViewResetAll(sqlite3 * db)
  * Remove entries from the _sql_stat1 and _sql_stat4
  * system spaces after a DROP INDEX or DROP TABLE command.
  *
- * @param pParse Parsing context.
- * @param zType Type of entry to be deleted:
- * 'idx' or 'tbl' string literal.
- * @param zName Name of index or table.
+ * @param parse      The parsing context.
+ * @param table_name The table to be dropped or
+ *                   the table that contains index to be dropped.
+ * @param idx_name   Index to be dropped.
  */
 static void
-sql_clear_stat_spaces(Parse * pParse, const char *zType, const char *zName)
+sql_clear_stat_spaces(Parse *parse, const char *table_name,
+       const char *idx_name)
 {
- sqlite3NestedParse(pParse, "DELETE FROM \"_sql_stat1\" WHERE \"%s\"=%Q",
-    zType, zName);
- sqlite3NestedParse(pParse, "DELETE FROM \"_sql_stat4\" WHERE \"%s\"=%Q",
-    zType, zName);
+ if (idx_name != NULL) {
+ sqlite3NestedParse(parse,
+    "DELETE FROM \"_sql_stat1\" "
+    "WHERE (\"idx\"=%Q AND "
+    "\"tbl\"=%Q)",
+    idx_name, table_name);
+ sqlite3NestedParse(parse,
+    "DELETE FROM \"_sql_stat4\" "
+    "WHERE (\"idx\"=%Q AND "
+    "\"tbl\"=%Q)",
+    idx_name, table_name);
+ } else {
+ sqlite3NestedParse(parse,
+    "DELETE FROM \"_sql_stat1\" "
+    "WHERE \"tbl\"=%Q",
+    table_name);
+ sqlite3NestedParse(parse,
+    "DELETE FROM \"_sql_stat4\" "
+    "WHERE \"tbl\"=%Q",
+    table_name);
+ }
 }

вс, 15 апр. 2018 г. в 9:09, Hollow111 <hollow653@gmail.com>:

> Hello. Changes have been made.
> Diff:
>
> diff --git a/src/box/sql/build.c b/src/box/sql/build.c
> index 92f3cb6..ce5878c 100644
> --- a/src/box/sql/build.c
> +++ b/src/box/sql/build.c
> @@ -2129,18 +2129,32 @@ sqliteViewResetAll(sqlite3 * db)
>   * Remove entries from the _sql_stat1 and _sql_stat4
>   * system spaces after a DROP INDEX or DROP TABLE command.
>   *
> - * @param pParse Parsing context.
> - * @param zType Type of entry to be deleted:
> - * 'idx' or 'tbl' string literal.
> - * @param zName Name of index or table.
> + * @param parse      The parsing context.
> + * @param table_name The table to be dropped or
> + *                   the table that contains index to be dropped.
> + * @param idx_name   Index to be dropped.
>   */
>  static void
> -sql_clear_stat_spaces(Parse * pParse, const char *zType, const char
> *zName)
> +sql_clear_stat_spaces(Parse *parse, const char *table_name,
> +       const char *idx_name)
>  {
> - sqlite3NestedParse(pParse, "DELETE FROM \"_sql_stat1\" WHERE \"%s\"=%Q",
> -    zType, zName);
> - sqlite3NestedParse(pParse, "DELETE FROM \"_sql_stat4\" WHERE \"%s\"=%Q",
> -    zType, zName);
> + if (idx_name != NULL) {
> + sqlite3NestedParse(parse,
> +    "DELETE FROM \"_sql_stat1\" WHERE (\"idx\"=%Q AND "
> +    "\"tbl\"=%Q)",
> +    idx_name, table_name);
> + sqlite3NestedParse(parse,
> +    "DELETE FROM \"_sql_stat4\" WHERE (\"idx\"=%Q AND "
> +    "\"tbl\"=%Q)",
> +    idx_name, table_name);
> + } else {
> + sqlite3NestedParse(parse,
> +    "DELETE FROM \"_sql_stat1\" WHERE \"tbl\"=%Q",
> +    table_name);
> + sqlite3NestedParse(parse,
> +    "DELETE FROM \"_sql_stat4\" WHERE \"tbl\"=%Q",
> +    table_name);
> + }
>  }
>
>  /**
> @@ -2325,7 +2339,7 @@ sql_drop_table(struct Parse *parse_context, struct
> SrcList *table_name_list,
>   *    tuple with corresponding space_id from _space.
>   */
>
> - sql_clear_stat_spaces(parse_context, "tbl", space_name);
> + sql_clear_stat_spaces(parse_context, space_name, NULL);
>   struct Table *tab = sqlite3HashFind(&db->pSchema->tblHash, space_name);
>   sqlite3FkDropTable(parse_context, table_name_list, tab);
>   sql_code_drop_table(parse_context, space, is_view);
> @@ -3328,7 +3342,7 @@ sql_drop_index(struct Parse *parse_context, struct
> SrcList *index_name_list,
>   * But firstly, delete statistics since schema
>   * changes after DDL.
>   */
> - sql_clear_stat_spaces(parse_context, "idx", index->def->name);
> + sql_clear_stat_spaces(parse_context, table_name, index->def->name);
>   int record_reg = ++parse_context->nMem;
>   int space_id_reg = ++parse_context->nMem;
>   sqlite3VdbeAddOp2(v, OP_Integer, space_id, space_id_reg);
>
>
> сб, 14 апр. 2018 г. в 11:13, n.pettik <korablev@tarantool.org>:
>
>>
>> On 14 Apr 2018, at 07:29, Hollow111 <hollow653@gmail.com> wrote:
>>
>> Hello. I'd like to ask about 'one kind of corrections”.
>>
>>
>>
>>> Arguments which you carry to the next line, should start right below
>>> previous:
>>>
>>> void f(x int, ….
>>>           y char, ….
>>>           z double …);
>>>
>>
>> I couldnt find this in  "C style guide" (
>> https://tarantool.io/en/doc/2.0/dev_guide/c_style_guide.html)
>> Moreover according to this guide:
>> "Outside of comments, documentation and except in Kconfig, spaces are
>> never used for indentation...".
>> Which means we're supposed to violate this rule
>>
>>
>> In fact, they are used. Probably, we should update and clarify this point
>> in docs.
>> You use tabs as much as possible. To precisely align argument lists, you
>> have
>> to use spaces:
>>
>> return_value very_long_function_name_bla_bla_bla(int first_argument,
>> int second_argument)
>>
>> To make ’second_argument’ be under first, you should use 8 tabs + 1 space.
>> Overall, you can inspect other source files from box/ to understand how
>> source files should be formatted. Also, I advise you to make spaces and
>> tabs visible.
>> For instance, see how it was done in box/space.c 106 : space_create()
>>
>> in case first argument is positioned not on the same range
>> from left corner of screen as any amount of 8-character tabs.
>> Maybe I'm wrong at smth but I'd like to have an explanation.
>>
>>
>>