https://bugzilla.wikimedia.org/show_bug.cgi?id=40979
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Bug #: 40979
Summary: When creating a table via 'LoadExtensionSchemaUpdates'
a missing semicolon in the sql file silently fails
Product: MediaWiki
Version: 1.20
Platform: All
OS/Version: All
Status: UNCONFIRMED
Severity: normal
Priority: Unprioritized
Component: Database
AssignedTo: [email protected]
ReportedBy: [email protected]
Classification: Unclassified
Mobile Platform: ---
To reproduce, follow the instructions in
http://www.mediawiki.org/wiki/Manual:Hooks/LoadExtensionSchemaUpdates in order
to create a new table. However, in the sql file do not put a semicolon on the
end of the CREATE TABLE text.
Then run update.php and it will claim to have created the table but has not.
Even with debugging turned up it doesn't complain.
Analysis:
The problem is in includes/db/Database.php function sourceStream(). This tries
to recognise the end of a command either by feof becoming true or
streamStatementEnd() finding the semicolon. However, an actual end of file will
never end up in the block that executes $cmd, as an end-of-file will exit the
while loop long before it gets to that if statement. Therefore, a missing
semicolon causes the loop to drop through and return TRUE as if the file was
empty.
The underlying issue is that the code to process $cmd should not be inside the
loop. That's a bit weird!
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