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can't assign local variables to user variables #8911

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jycor opened this issue Mar 1, 2025 · 0 comments

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bug correctness_approved

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jycor commented Mar 1, 2025

When you have a stored procedure declared like this:

create procedure proc()
begin
  declare v int default 123;
  set @v = v;
end;

Dolt:

tmp2/main*> select @v;
+------+
| @v   |
+------+
| NULL |
+------+
1 row in set (0.00 sec)

tmp2/main*> call proc();
+
|
+
|
+
1 row in set (0.00 sec)

tmp2/main*> select @v;
+------+
| @v   |
+------+
| NULL |
+------+
1 row in set (0.00 sec)

MySQL:

mysql> select @v;
+------+
| @v   |
+------+
| NULL |
+------+
1 row in set (0.0004 sec)

mysql> call proc();
Query OK, 0 rows affected (0.0007 sec)

tmp2/main*> select @v;
+-----+
| @v  |
+-----+
| 123 |
+-----+
1 row in set (0.0004 sec)

jycor added bug correctness_approved labels

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