CF8 cfquery multiple table join with the same names of columns - default

This seems to be a defect in the CF8 cfquery object. I'm at a loss as to a solution or a good work around. With regard to the substance, this query is generated dynamically on the fly based on what is happening in it a user. This isn't the most elegent SQL but work and return all columns. The app itself is a data viewer to look at the logs. Here is an example of a query being generated.

Select *.

of web_trans, web_info_trans, web_res_trans

where (web_info_trans.trans_dte > = '' 2008-12-1)

and web_info_trans.trans_dte < '' 2008-12-2)

and (web_info_trans.trans_dte = web_trans.trans_dte)

and (web_info_trans.trans_num = 5060345)

and (web_info_trans.trans_num = web_trans.trans_num)

and (web_res_trans.trans_num = 5060345)

and (web_res_trans.trans_num = web_trans.trans_num)

and (web_trans.web_trans_cde = "NTUI")

and (web_trans.web_status_cde = 'P')

and (web_trans. TRANS_NUM < 5060347)

order of web_trans. TRANS_NUM / / desc

These three tables contain a similar column called ZIP_CDE. They contain different values, and when this query is executed in Microsoft Query Analyzer results are displayed correctly. Run this same query SQL with CFQUERY and the value of one of the other tables (web_trans) will eventually replace the value for the other columns called ZIP_CDE. The exact amount columns are retruned only values some how get corrupted.

This is a defect of cf8 is a book autour or an update that resolves this problem that I may have missed?

Thank you for the ideas.

Thus it seems still as a default since CF is essentially where, except for the return value play. Other query tools return results correctly so for me, it turns out be CF bug at a certain level.

Actually I'm swinging to agree with you here, but not for the same reason.  CF actually * is * get all the columns back (as you say), it just doesn't expose a way to tell the difference between a column called 'x' and an another column called 'x', because the way to access the data in columns is simple queryname [columnName] [rowNumber] (or a Variant fo this, but all the amount of variations to that or abbrev. it).  This code shows how he has all four columns of the original two queries (being a stand-in for tables, in this case):


Q1 = queryNew("");
Q2 = queryNew("");
   
queryAddColumn (q1, 'id', [1,2,3,4]);
queryAddColumn (q1, "data", ["one", "two", "three", "four"]);
queryAddColumn (q2, 'id', [1,2,3,4]);
queryAddColumn (q2, "data", ["tahi", "rua", "toru", "wha"]); It's Maori, in case you are interested


SELECT *.
Q1, q2
WHERE q1.id = q2.id

So CF knows there are four columns (a call getMetadata (q3) get also demonstrates this), but it does not expose a way to approach the second (or even greater) column of the same name.  This is the bug/shortfall.

However, relying on an underlying coldfusion.sql.QueryTable method, you can rename the columns, so:

Then you're OK.

I would be normally reluctant to recommend doing this, because these methods change from version to version of CF, but it's your call whether this approach will help you.

To be honest, I'm with Owain who, even in SQL one generally doesn't work with columns with the same name, an alias them qualified with a table name/alias. As the table columns from of is not returned by SQL with the result set, it must be evidence against this by folding the columns in the first place.

Also, I wonder at the bottom of the extraction of data, you don't really know the structure, that is to say, do SELECT *.  How can you know not even that is ours as the first column, second column, etc.?  I don't think that SQL applies in fact a contract that, t - it?  (I don't know).

What are you actually do here?

--

Adam

Tags: ColdFusion

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