Fixed issue: createUpdateCommand does not accept just a table name when using MSSQL

[c-schmitz]

If a tablename as string is given the following error occurs:
Error: Call to a member function getColumn() on string

Normal CDBCommand (Mysql) does this just fine.

Q	A
Is bugfix?	✔️
New feature?	❌
Breaks BC?	❌
Tests pass?	✔️

[marcovtwout]

That function ensureTable() only assets if the tablename is valid, and throws an exception if it is not. That does not seem to fix the issue you are describing?

[c-schmitz]

Look at ensureTable again. It modifies the $table variable, and replaces it with an object if it is a string.

[marcovtwout]

@c-schmitz You are correct :) Are there any other functions for MsSql where this should also be applied?

If you would update the CHANGELOG as well in your PR I'd be happy to merge it.

[c-schmitz]

We use MSSQL extensively for years in Yii1 and did not encounter any other issues.
I wil update the CHANGELOG.

[marcovtwout]

Have not tested but static code looks good.

[marcovtwout]

Thanks! Merging