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Nov 2, 2011 11:42 AM
by: McScreech
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Debugger not working (was: No char() type?)
Posted:
Oct 6, 2011 12:57 PM
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Can anyone explain why there seems to be no mechanism to accept char() data types of specified width but only varchar()? It does have both string and varstring.
A few examples:
1) In the editor the char term is highlighted as a function (as defined in Tools | Options | Editor | Highlighting Styles). Also, so are the terms INSERT and DEFAULT (perhaps others?) which I thought were reserved words and therefore should be the same as CREATE TABLE.
CREATE TABLE edges(
childID CHAR(1) NOT NULL,
parentID CHAR(1) NOT NULL,
PRIMARY KEY (childID, parentID)
);
If I change char() to varchar() it changes to black-bold as defined in the styles.
2) When setting Debugger Start Parameters there is no char option in the type drop down list only varchar().
I'm about to experiment with this idea to see if stored procedures I am unable to step through in a debug trace will work with all instances of char() changed to varchar(). I may post a question related this after I dig deeper.
Thanx, McS
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Posts:
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Re: No char() type?
Posted:
Oct 7, 2011 9:22 AM
in response to: McScreech
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Windoze XP Pro SP3
MySQL 5.1.51-community
Toad for MySQL 6.0.1.1723
(code used at end of post)
OK, so when I attempt to debug my procedure I observe the following sequence:
1) set debugger start parameters:
select type = VarChar, enter value = A, check Collect debug trace
I notice that it changes all instances of char(1) in my procedure code with varchar(1) in the new editor window.
2) click run debugger, get error:
System.ArgumentOutOfRangeException
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
Stack Trace:
at System.ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument argument, ExceptionResource resource)
at System.ThrowHelper.ThrowArgumentOutOfRangeException()
at System.Collections.Generic.List`1.get_Item(Int32 index)
at Quest.Toad.MySQL.Debugger.MySQLDebugProvider.GetAllWatchesImplementation(ContextType contextType, Int32 contextLevel)
at Quest.Toad.Debugger.DebugProviderBase.GetAllWatches(ContextType contextType, Int32 contextLevel)
at Quest.Toad.Debugger.Trace.DebugTrace.AddTraceLine(IDebugProvider provider, DebugExecutionArgs args)
at Quest.Toad.Debugger.DebugClient.AddTrace(IDebugProvider provider, DebugExecutionArgs args)
at Quest.Toad.Debugger.DebugClient.ExecutionFinished(IDebugProvider provider, DebugExecutionArgs args)
at Quest.Toad.Debugger.DebugProviderBase.ExecutionFinished(Object sender, DebugExecutionArgs args)
3) halt debugger, get error:
System.ArgumentNullException
Value cannot be null.
Parameter name: key
Stack Trace:
at System.Windows.Forms.Control.MarshaledInvoke(Control caller, Delegate method, Object[] args, Boolean synchronous)
at System.Windows.Forms.Control.Invoke(Delegate method, Object[] args)
at Quest.Toad.Util.Global.Invoke(Delegate handler, Object[] args)
at Quest.Toad.Db.ToadDataAdapter.RaiseDone(Object sender, EventArgs args)
at Quest.Toad.Db.ToadDataAdapter.InternalFillBackground()
4) does create a trace but, if I try to replay get error:
System.NullReferenceException
Object reference not set to an instance of an object.
Stack Trace:
at Quest.Toad.Debugger.DebugMediator.FocusCodeLocation(CodeLocation location)
at Quest.Toad.Debugger.DebugClient.ExecutionFinished(IDebugProvider provider, DebugExecutionArgs args)
at Quest.Toad.Debugger.Trace.DebugTraceProvider.FinishedExecuting()
5) now debugger is hung, halt button does not stop it, shift+f11 does not stop it. I bring up View | Background Processes dialog (which does not show any running) and clicking on Stop all running processes button which does not stop it. I have to close the current editor tab to get a Halt Debug Session dialog that stops it.
Now, looking at my code below I am wondering if the change from char to varchar may create a conflict. I ask this because I have created and populated the tables earlier and only paste the procedure code into a fresh editor tab to debug.
My next attempt will be to change all instances of char to varchar in all required tables.
Many Thanx, McS
PS for anyone interested this is listing 1 and 2 from:
http://www.artfulsoftware.com/mysqlbook/sampler/mysqled1ch20.html
CREATE TABLE nodes(
nodeID CHAR(1) PRIMARY KEY
);
CREATE TABLE edges(
childID CHAR(1) NOT NULL,
parentID CHAR(1) NOT NULL,
PRIMARY KEY(childID,parentID)
);
INSERT INTO nodes VALUES('A'), ('B'), ('C'), ('D'), ('E'), ('F');
INSERT INTO edges VALUES ('A','C'), ('C','D'), ('C','F'), ('B','E');
DROP PROCEDURE IF EXISTS ListReached;
DELIMITER go
CREATE PROCEDURE ListReached( IN root CHAR(1) )
BEGIN
DECLARE rows SMALLINT DEFAULT 0;
DROP TABLE IF EXISTS reached;
CREATE TABLE reached (
nodeID CHAR(1) PRIMARY KEY
) ENGINE=HEAP;
INSERT INTO reached VALUES (root );
SET rows = ROW_COUNT();
WHILE rows > 0 DO
INSERT IGNORE INTO reached
SELECT DISTINCT childID
FROM edges AS e
INNER JOIN reached AS p ON e.parentID = p.nodeID;
SET rows = ROW_COUNT();
INSERT IGNORE INTO reached
SELECT DISTINCT parentID
FROM edges AS e
INNER JOIN reached AS p ON e.childID = p.nodeID;
SET rows = rows + ROW_COUNT();
END WHILE;
SELECT * FROM reached;
DROP TABLE reached;
END; go
DELIMITER ;
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Posts:
314
Registered:
8/23/07
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Re: No char() type?
Posted:
Oct 7, 2011 9:55 AM
in response to: McScreech
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You don't need to specify a parameter as CHAR while debugging. In this case there wont be any difference between the two.
That said the debugger should break like that. I will investigate the issue.
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Posts:
13
Registered:
9/30/11
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Re: No char() type?
Posted:
Oct 18, 2011 6:46 AM
in response to: Mauritz
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Any suggestions yet? McS.
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Posts:
13
Registered:
9/30/11
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Re: Debugger not working
Posted:
Nov 2, 2011 11:40 AM
in response to: McScreech
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I still cannot seem to debug any stored procedures, even those that do give acceptable results when executed without calling the debugger. Also, there appear to be several open questions regarding this issue.
Has anyone made progress with this?
Thanx, McS
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