Question

Here is a pretty simple code :

$query = "RENAME TABLE myOldTableName TO myNewTableName";
$is_ok = mysql_query($query);
echo ($is_ok) ? "Rename OK" : "Rename aborted";

But it alwayls print “Rename aborted”.

I found on php.net :

When processing a RENAME TABLE query, PHP apparently always returns false, 
no matter if the query was successfully processed or not.

I tried mysql_affected_rows, but not working..
Any idea to know if the rename worked or not ? (without another query like SELECT, or SHOW TABLES, etc).

Thanks !

Answer 1

Well, after many tests, here we are :

RENAME TABLE `mytable_a` TO `mytable_b`
mysql_query           :  bool(true)
mysql_affected_rows() :  int(0)
mysql_info()          :  bool(false)

RENAME TABLE `tableNotExists` TO `FooBar`
mysql_query           :  bool(false)
mysql_affected_rows() :  int(-1)
mysql_info()          :  bool(false)

ALTER TABLE `mytable_b` CHANGE `fieldFOO` `fieldBAR` INT(11) NOT NULL
mysql_query           :  bool(true)
mysql_affected_rows() :  int(42053)
mysql_info()          :  string(42) "Records: 42053 Duplicates: 0 Warnings: 0"

ALTER TABLE `mytable_b` CHANGE `fieldNotExists` `newName` INT(11) NOT NULL
mysql_query           :  bool(false)
mysql_affected_rows() :  int(-1)
mysql_info()          :  bool(false) 

After all, RENAME TABLE seems to work fine. The comment on php.net is apparently wrong, and I went as wrong as him on my first tests.

I want to thank Fahim Parkar who put his finger on a solution, and Entropy and Leigh who offer me alternative 😉

Tell me if something seems wrong !