dolthub/dolt

Dolt differs from MySQL on allowing query global only system variable with session scope

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#6722 aperta il 26 set 2023

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bugcorrectnessgood first issuegood reprosql

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Descrizione

Dolt display incorrect header for querying global only variable without specifying the scope. It also should error on querying global only variable with SESSION scope. Dolt:

mysql> SELECT @@system_time_zone;
+----------------------------+
| @@SESSION.system_time_zone |
+----------------------------+
| PDT                        |
+----------------------------+
1 row in set (0.00 sec)

mysql> SELECT @@SESSION.system_time_zone;
+----------------------------+
| @@SESSION.system_time_zone |
+----------------------------+
| PDT                        |
+----------------------------+
1 row in set (0.00 sec)

MySQL:

mysql> SELECT @@system_time_zone;
+--------------------+
| @@system_time_zone |
+--------------------+
| PDT                |
+--------------------+
1 row in set (0.00 sec)

mysql> SELECT @@SESSION.system_time_zone;
ERROR 1238 (HY000): Variable 'system_time_zone' is a GLOBAL variable

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