Recursive Trigger For Cascading Delete Doesnt Go More Than One Level
Oct 3, 2005
hello guysi am using a table that its secondary key connected to its primary key...and as sql server 2000 doesnt allow cascade delete fore such,i had to write a trigger myselfso i wrote the following triggerCREAT TRIGGER nameON tableFOR DeleteASBEGINIF @@ROWCOUNT >0Delete from table where table.parentID in (select sortID from deleted);ENDthen i went to the table and i tried to delete...and it gave me an error....that there are records that have there parentID= sortID of the table i am trieng to delete...so i deleted the relationship...and kept the triggerand now ...when i delete one...it deletes one level down....but not more....i mean when i delete sortID=4it deletes all the records that has parentID=4...and NOT more..whereas my aim was to have it recursive not to have records lost in my databasehope i explained good as much as i hope to find an answer soon...a clear one...and thanks in advanced...
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Aug 17, 2005
I need to implement my cascading deletes on a SQL database. Is it better (performance/reliablility-wise) to use the Foreign Key Cascading Deletes or to just write my own triggers to do the deletes?I was hoping someone had experimented and found which works best.
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Nov 13, 2006
I am having great difficulty with cascading deletes, delete triggers and referential integrity.
The database is in First Normal Form.
I have some tables that are child tables with two foreign keyes to two different parent tables, for example:
Table A
/
Table B Table C
/
Table D
So if I try to turn on cascading deletes for A/B, A/C, B/D and C/D relationships, I get an error that I cannot have cascading delete because it would create multiple cascade paths. I do understand why this is happening. If I delete a row in Table A, I want it to delete child rows in Table B and table C, and then child rows in table D as well. But if I delete a row in Table C, I want it to delete child rows in Table D, and if I delete a row in Table B, I want it to also delete child rows in Table D.
SQL sees this as cyclical, because if I delete a row in table A, both table B and table C would try to delete their child rows in table D.
Ok, so I thought, no biggie, I'll just use delete triggers. So I created delete triggers that will delete child rows in table B and table C when deleting a row in table A. Then I created triggers in both Table B and Table C that would delete child rows in Table D.
When I try to delete a row in table A, B or C, I get the error "Delete Statement Conflicted with COLUMN REFERENCE". This does not make sense to me, can anyone explain? I have a trigger in place that should be deleting the child rows before it attempts to delete the parent row...isn't that the whole point of delete triggers?????
This is an example of my delete trigger:
CREATE TRIGGER [DeleteA] ON A
FOR DELETE
AS
Delete from B where MeetingID = ID;
Delete from C where MeetingID = ID;
And then Table B and C both have delete triggers to delete child rows in table D. But it never gets to that point, none of the triggers execute because the above error happens first.
So if I then go into the relationships, and deselect the option for "Enforce relationship for INSERTs and UPDATEs" these triggers all work just fine. Only problem is that now I have no referential integrity and I can simply create unrestrained child rows that do not reference actual foreign keys in the parent table.
So the question is, how do I maintain referential integrity and also have the database delete child rows, keeping in mind that the cascading deletes will not work because of the multiple cascade paths (which are certainly required).
Hope this makes sense...
Thanks,
Josh
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Feb 16, 2008
This function will generate all DELETE statements in correct order to perform a CASCADING delete.
For self-joined tables, it will generate the T-SQL code to "unwind" the table, also in correct order!CREATE FUNCTION dbo.fnCascadingDelete
(
@Schema NVARCHAR(128) = NULL,
@Table NVARCHAR(128) = NULL
)
RETURNS@Return TABLE
(
RowID INT PRIMARY KEY CLUSTERED,
IsSelfJoin TINYINT NOT NULL,
HasPk TINYINT NOT NULL,
[SQL] NVARCHAR(4000) NOT NULL
)
AS
BEGIN
DECLARE@Constraints TABLE
(
RowID INT NOT NULL,
Indent SMALLINT NOT NULL,
[Catalog] NVARCHAR(128) NOT NULL,
[Schema] NVARCHAR(128) NOT NULL,
[Table] NVARCHAR(128) NOT NULL,
[Column] NVARCHAR(128),
pkCatalog NVARCHAR(128),
pkSchema NVARCHAR(128),
pkTable NVARCHAR(128),
pkColumn NVARCHAR(128),
pkType NVARCHAR(128),
pkSize INT,
IsSelfJoin TINYINT NOT NULL,
HasPk TINYINT NOT NULL
)
INSERT@Constraints
(
RowID,
Indent,
[Catalog],
[Schema],
[Table],
[Column],
pkCatalog,
pkSchema,
pkTable,
pkColumn,
pkType,
pkSize,
IsSelfJoin,
HasPk
)
SELECTRowID,
Indent,
[Catalog],
[Schema],
[Table],
[Column],
pkCatalog,
pkSchema,
pkTable,
pkColumn,
pkType,
pkSize,
SelfJoin,
CASE
WHEN [Column] IS NULL THEN 0
ELSE 1
END
FROMdbo.fnTableTree(@Schema, @Table)
IF @@ROWCOUNT = 0
RETURN
DECLARE@SQL TABLE
(
ID INT IDENTITY(1, 1),
RowID INT PRIMARY KEY CLUSTERED,
IsSelfJoin TINYINT NOT NULL,
HasPk TINYINT NOT NULL,
[SQL] NVARCHAR(4000) NOT NULL
)
DECLARE@Indent SMALLINT,
@RowID INT,
@ID INT,
@TSQL NVARCHAR(4000),
@RowSQL NVARCHAR(4000),
@EndSQL NVARCHAR(4000),
@pkColumn NVARCHAR(128),
@IsSelfJoin TINYINT,
@HasPk TINYINT
DECLARE@Unwind TABLE
(
RowID INT NOT NULL,
StepID INT IDENTITY(0, 1) PRIMARY KEY NONCLUSTERED,
[SQL] NVARCHAR(4000)
)
WHILE NOT EXISTS (SELECT * FROM @SQL WHERE RowID = 1)
BEGIN
SELECT TOP 1@RowID = c.RowID,
@ID = c.RowID,
@Indent = c.Indent,
@TSQL = N'',
@EndSQL = N'',
@IsSelfJoin = c.IsSelfjoin,
@HasPk = c.HasPk
FROM@Constraints AS c
LEFT JOIN@SQL AS s ON s.RowID = c.RowID
WHEREs.RowID IS NULL
ORDER BYc.Indent DESC,
c.RowID DESC
WHILE @ID > 0
BEGIN
IF @Indent = 0
SELECT@RowSQL = N'DELETE t' + CAST(@RowID AS NVARCHAR(12)),
@RowSQL = @RowSQL + N' FROM ' + QUOTENAME(c.[Catalog]) + N'.' + QUOTENAME(c.[Schema]) + N'.' + QUOTENAME(c.[Table]) + N' AS t' + CAST(@ID AS NVARCHAR(12)),
@EndSQL = N' WHERE t' + CAST(@ID AS NVARCHAR(12)) + '.' + QUOTENAME(COALESCE(c.[Column], '%0')) + N' = ''%1''',
@IsSelfJoin = @IsSelfJoin | c.IsSelfJoin
FROM@Constraints AS c
WHEREc.RowID = @ID
ELSE
SELECT@RowSQL = N' INNER JOIN ' + QUOTENAME(c.[Catalog]) + N'.' + QUOTENAME(c.[Schema]) + N'.' + QUOTENAME(c.[Table]),
@RowSQL = @RowSQL + N' AS t' + CAST(@ID AS NVARCHAR(12)) + N' ON t' + CAST(@ID AS NVARCHAR(12)) + N'.' + QUOTENAME(c.[Column]),
@pkColumn = QUOTENAME(c.pkColumn),
@IsSelfJoin = @IsSelfJoin | c.IsSelfJoin
FROM@Constraints AS c
WHEREc.RowID = @ID
SELECT TOP 1@ID = c.RowID,
@Indent = c.Indent,
@RowSQL = @RowSQL + N' = t' + CAST(c.RowID AS NVARCHAR(12)) + N'.' + @pkColumn,
@IsSelfJoin = @IsSelfJoin | c.IsSelfJoin
FROM@Constraints AS c
WHEREc.RowID < @ID
AND c.Indent < @Indent
ORDER BYc.Indent DESC,
c.RowID DESC
IF @@ROWCOUNT = 0
SET@ID = 0
SET@TSQL = @RowSQL + @TSQL
END
INSERT@SQL
(
RowID,
IsSelfJoin,
HasPk,
[SQL]
)
VALUES(
@RowID,
@IsSelfJoin,
@HasPk,
@TSQL + @EndSQL
)
IF @IsSelfJoin = 1
BEGIN
DECLARE@Yak NVARCHAR(160),
@Catalog NVARCHAR(128),
@Column NVARCHAR(128)
SELECT@Yak = pkType + COALESCE('(' + CAST(pkSize AS NVARCHAR(12)) + ')', ''),
@Catalog = [Catalog],
@Schema = [Schema],
@Table = [Table],
@Column = [Column],
@Catalog = [Catalog],
@Table = [Table],
@pkColumn = pkColumn
FROM@Constraints
WHERERowID = @RowID
SET@RowSQL = 'DECLARE@Lvl INT
SET@Lvl = 0
DECLARE@Stage TABLE (RowID INT IDENTITY(0, 1), Lvl INT, RowKey ' + @Yak + ')
INSERT @Stage (Lvl, RowKey) '
+ REPLACE(@TSQL + @EndSQL, 'DELETE t' + CAST(@RowID AS NVARCHAR(12)) + '', 'SELECT 0, t' + CAST(@RowID AS NVARCHAR(12)) + '.' + QUOTENAME(@Column) + '')
+ ' WHILE @@ROWCOUNT > 0
BEGIN
SET@Lvl = @Lvl + 1
INSERT@Stage (Lvl, RowKey)
SELECT@Lvl,
t.' + QUOTENAME(@pkColumn) + '
FROM' + QUOTENAME(@Catalog) + '.' + QUOTENAME(@Schema) + '.' + QUOTENAME(@Table) + ' AS t
INNER JOIN@Stage AS s ON s.RowKey = t.' + QUOTENAME(@Column) + '
AND s.Lvl = @Lvl - 1
LEFT JOIN@Stage AS cr ON cr.RowKey = t.' + QUOTENAME(@pkColumn) + '
WHEREcr.RowKey IS NULL
END
SELECT ''DELETE FROM ' + QUOTENAME(@Catalog) + '.' + QUOTENAME(@Schema) + '.' + QUOTENAME(@Table) + ' WHERE ' + QUOTENAME(@pkColumn) + ' = '' + QUOTENAME(RowKey, '''''''')
FROM @Stage
WHERE RowID > 0
ORDER BY RowID DESC'
INSERT@Unwind
(
RowID,
[SQL]
)
VALUES(
@RowID,
@RowSQL
)
END
END
INSERT@Return
(
RowID,
IsSelfJoin,
HasPk,
[SQL]
)
SELECTs.ID,
s.IsSelfJoin,
s.HasPk,
CASE
WHEN u.RowID IS NULL THEN s.[SQL]
ELSE u.[SQL]
END
FROM@SQL AS s
LEFT JOIN@Unwind AS u ON u.RowID = s.RowID
ORDER BYs.ID,
u.StepID
RETURN
ENDE 12°55'05.25"
N 56°04'39.16"
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Nov 14, 2006
Hey,
I'm new to this whole SQL Server 2005 thing as well as database design and I've read up on various ways I can integrate business constraints into my database. I'm not sure which way applies to me, but I could use a helping hand in the right direction.
A quick explanation of the various tables I'm dealing with:
WBS - the Work Breakdown Structure, for example: A - Widget 1, AA - Widget 1 Subsystem 1, and etc.
Impacts - the Risk or Opportunity impacts for the weights of a part/assembly. (See Assemblies have Impacts below)
Allocations - the review of the product in question, say Widget 1, in terms of various weight totals, including all parts. Example - September allocation, Initial Demo allocation, etc. Mostly used for weight history and trending
Parts - There are hundreds of Parts which will eventually lead to thousands. Each part has a WBS element. [Seems redundant, but parts are managed in-house, and WBS elements are cross-company and issued by the Government]
Parts have Allocations - For weight history and trending (see Allocations). Example, Nut 17 can have a September 1st allocation, a September 5th allocation, etc.
Assemblies - Parts are assemblies by themselves and can belong to multiple assemblies. Now, there can be multiple parts on a product, say, an unmanned ground vehicle (UGV), and so those parts can belong to a higher "assembly" [For example, there can be 3 Nut 17's (lower assembly) on Widget 1 Subsystem 2 (higher assembly) and 4 more on Widget 1 Subsystem 5, etc.]. What I'm concerned about is ensuring that the weight roll-ups are accurate for all of the assemblies.
Assemblies have Impacts - There is a risk and opportunity impact setup modeled into this design to allow for a risk or opportunity to be marked on a per-assembly level. That's all this table represents.
A part is allocated a weight and then assigned to an assembly. The Assemblies table holds this hierarchical information - the lower assembly and the higher one, both of which are Parts entries in the [Parts have Allocations] table.
Therefore, to ensure proper weight roll ups in the [Parts have Allocations] table on a per part-basis, I would like to check for any inserts, updates, deletes on both the [Parts have Allocations] table as well as the [Assemblies] table and then re-calculate the weight roll up for every assembly. Now, I'm not sure if this is a huge performance hog, but I do need to keep all the information as up-to-date and as accurate as possible. As such, I'm not sure which method is even correct, although it seems an AFTER DML trigger is in order (from what I've gathered thus far). Keep in mind, this trigger needs to go through and check every WBS or Part and then go through and check all of it's associated assemblies and then ensure the weights are correct by re-summing the weights listed.
If you need the design or create script (table layout), please let me know.
Thanks.
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Nov 8, 2006
I use SQL Server 2005I have tables tblUserData, tblUsersAndGuestbook, tblGuestbooktblUserdata contains:UserCode intUsername nvarchar(50)tblUsersAndGuestbook contains:Usercode int (FK to tblUserData)GBEntryCode inttblGuestbookGBEntryCode int (FK to tblUsersAndGuestbook)GBText textNow...if I delete a user in tblUserData I want to also delete the entries in tblUsersAndGuestbook AND in tblGuestbook.I've heard something about cascading delete, but how can i configure that in my database?Or do I manually need to delete all entries from code?
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Jun 4, 2001
Hi,
I read all the existing material in SWYNK but still am not clear on the following question.
What is the best way to perform Cascading actions (Delete & Update) with foreign Key Constraints declared? We are using SQL Server 7.0
thanks
Rozina
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Sep 14, 2004
Procedure spDeleteRows
/*
Recursive row delete procedure.
It deletes all rows in the table specified that conform to the criteria selected,
while also deleting any child/grandchild records and so on. This is designed to do the
same sort of thing as Access's cascade delete function. It first reads the sysforeignkeys
table to find any child tables, then deletes the soon-to-be orphan records from them using
recursive calls to this procedure. Once all child records are gone, the rows are deleted
from the selected table. It is designed at this time to be run at the command line. It could
also be used in code, but the printed output will not be available.
*/
(
@cTableName varchar(50), /* name of the table where rows are to be deleted */
@cCriteria nvarchar(1000), /* criteria used to delete the rows required */
@iRowsAffected int OUTPUT /* number of records affected by the delete */
)
As
set nocount on
declare @cTab varchar(255), /* name of the child table */
@cCol varchar(255), /* name of the linking field on the child table */
@cRefTab varchar(255), /* name of the parent table */
@cRefCol varchar(255), /* name of the linking field in the parent table */
@cFKName varchar(255), /* name of the foreign key */
@cSQL nvarchar(1000), /* query string passed to the sp_ExecuteSQL procedure */
@cChildCriteria nvarchar(1000), /* criteria to be used to delete
records from the child table */
@iChildRows int /* number of rows deleted from the child table */
/* declare the cursor containing the foreign key constraint information */
DECLARE cFKey CURSOR LOCAL FOR
SELECT SO1.name AS Tab,
SC1.name AS Col,
SO2.name AS RefTab,
SC2.name AS RefCol,
FO.name AS FKName
FROM dbo.sysforeignkeys FK
INNER JOIN dbo.syscolumns SC1 ON FK.fkeyid = SC1.id
AND FK.fkey = SC1.colid
INNER JOIN dbo.syscolumns SC2 ON FK.rkeyid = SC2.id
AND FK.rkey = SC2.colid
INNER JOIN dbo.sysobjects SO1 ON FK.fkeyid = SO1.id
INNER JOIN dbo.sysobjects SO2 ON FK.rkeyid = SO2.id
INNER JOIN dbo.sysobjects FO ON FK.constid = FO.id
WHERE SO2.Name = @cTableName
OPEN cFKey
FETCH NEXT FROM cFKey INTO @cTab, @cCol, @cRefTab, @cRefCol, @cFKName
WHILE @@FETCH_STATUS = 0
BEGIN
/* build the criteria to delete rows from the child table. As it uses the
criteria passed to this procedure, it gets progressively larger with
recursive calls */
SET @cChildCriteria = @cCol + ' in (SELECT [' + @cRefCol + '] FROM [' +
@cRefTab +'] WHERE ' + @cCriteria + ')'
print 'Deleting records from table ' + @cTab
/* call this procedure to delete the child rows */
EXEC spDeleteRows @cTab, @cChildCriteria, @iChildRows OUTPUT
FETCH NEXT FROM cFKey INTO @cTab, @cCol, @cRefTab, @cRefCol, @cFKName
END
Close cFKey
DeAllocate cFKey
/* finally delete the rows from this table and display the rows affected */
SET @cSQL = 'DELETE FROM [' + @cTableName + '] WHERE ' + @cCriteria
print @cSQL
EXEC sp_ExecuteSQL @cSQL
print 'Deleted ' + CONVERT(varchar, @@ROWCOUNT) + ' records from table ' + @cTableName
--------
The above code is good .. but has limitation...throws an error:
Server: Msg 217, Level 16, State 1, Procedure spDeleteRows, Line 58
Maximum stored procedure, function, trigger, or view nesting level exceeded (limit 32).
Can anyone out there suggest a better way of implementing on a database without a limitation of levels.. we are talking about a HUGE DB with lots of table and FK referentials..
Please advice.. or solve the problem..
Thank you
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Jul 20, 2005
I use cascading delete on my SQL Server Database. I am experiencing along query time on my highest level delete, 10 minutes. If I deletefrom each table manually and then delete the parent, I will usually bedone in less than a minute. Any suggestions?
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Aug 18, 2007
If we want to maintain the data in relationships.
There are two ways to do it.
1. Auto (Like Cascading Update And Delete)
2. Manually (Like In Stored Procedures)
I read an intresting article
http://imar.spaanjaars.com/QuickDocId.aspx?quickdoc=419
In this article Imar has choosen the second way (Manually).
And when I talk to Imar.
He said, "Cascading deletes would have worked equally well in this situation. However, I personally don't like them too much. I am much rather in control, enabling me to delete what I want and when I want it. I could, for example, keep certain data for "time travelling scenarios" (e.g. the state things were in some time ago) or I might want to keep it for other purposes."
Can any one help me to choose the better one.
Waiting for helpful replies.
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Nov 3, 2000
Can someone pls help me with a syntax example of a cascading delete trigger.
thanks
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Mar 21, 2007
I am attempting to do the following....
I have standard tree setup. The tree can be up to 4 nodes deep. User permissions may be assigned at any level in the tree. Any
permission should cascade down the tree to the lowest child node.
For example, if a user had a role of 1 for the root node (101), the sql should return:
OrgID RoleID
101 1
102 1
103 1
etc...
My table structure is as follows....
Org
OrgID ParentID
101 Null
102 101
103 101
105 102
106 102
107 105
108 105
109 106
110 106
111 106
UserOrgRole
UserID OrgID RoleID
User1 101 1
User1 102 2
User1 103 2
User1 107 2
User2 101 1
User3 106 3
etc...
What I would like to retrive from the above table data is....
OrgID RoleID
102 2
105 2
106 2
107 2
108 2
109 2
110 2
111 2
This is so because all the nodes (except for 101 and 103) are somehow decedent from the 102 node and 102 has a roleid of 2. I am only concerned with the RoleID 2 and User1.
I have worked for two days trying to figure out how to do this. I am not a DBA or SQL expert by any means. I cannot seem to figure
out how to traverse multiple levels of the tree. I have been using the new CTE and made some progress, but I think I reached my
plateau and haven't been able to get any further.
If someone could help me, I would be forever in your debt! I am really starting to get very frustrated and I know there are some of
you experts out there that would know exactly what to do.
thanks!
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Jul 15, 1999
Is it possible to perform a cascading delete and update using TRIGGERS on a table referenced by a foreign key constraint.?To be more specific.. if the primary key is deleted does the delete trigger on the primary table deletes the record in the foreign key table or does it return an error??
if possible please send us the T SQL Statements .
Thanks in Advance
Geenu
Ajaz Dawre
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Nov 16, 2006
Edit: Sorry This is OSQL.What I use as my query is:"DELETE FROM timerecord WHERE Actual_Time_In LIKE '11.12.2006%'"The row of Actual_Time_In is formatted with Date and time (MM.DD.YYYY HH:MM:SS) sometimes there are ten records and I'd rather not have to remove them from the table one at a time. However, even though I have a record that is '11.12.2006 22:43:00' my delete doesn't work osql states I have 0 rows affected.This is only MSDE so I don't have anyother way to open the table.Sometimes these records have other records that reference them. Is there anyway to do a cascading delete without it getting to complex?Thanks of all your help, I am just a tech support guy beating his head against a wall..
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Mar 17, 2008
need help with recursive trigger on multiple insert
i continue from this code
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=3010163&SiteID=1
tnx for the help
Code Snippet
CREATE TRIGGER TRIGGER [dbo].[CopyTotb_pivot_e]
ON [dbo].[tb_pivot_e]
FOR INSERT
AS
IF @@ROWCOUNT = 0
RETURN
INSERT INTO tb_pivot_big
SELECT
[Fname],
[new_unit],
[mhlka_id],
[mhlka],
1,
[fld1],
NULL,
NULL,
[fld2],
NULL,
NULL,
[fld3],
NULL,
NULL,
[fld4],
NULL,
NULL,
[fld5],
NULL,
NULL,
[fld6],
NULL,
NULL,
[fld7],
NULL,
NULL,
[fld8],
NULL,
NULL,
[fld9],
NULL,
NULL,
[fld10],
NULL,
NULL,
[fld11],
NULL,
NULL,
[fld12],
NULL,
NULL,
[fld13],
NULL,
NULL,
[fld14],
NULL,
NULL,
[fld15],
NULL,
NULL,
[fld16],
NULL,
NULL,
[fld17],
NULL,
NULL,
[fld18],
NULL,
NULL,
[fld19],
NULL,
NULL,
[fld20],
NULL,
NULL,
[fld21],
NULL,
NULL,
[fld22],
NULL,
NULL,
[fld23],
NULL,
NULL,
[fld24],
NULL,
NULL,
[fld25],
NULL,
NULL,
[fld26],
NULL,
NULL,
[fld27],
NULL,
NULL,
[fld28],
NULL,
NULL,
[fld29],
NULL,
NULL,
[fld30],
NULL,
NULL,
[fld31],
NULL,
NULL
FROM inserted
INSERT INTO tb_pivot_big
SELECT
[Fname],
[new_unit],
[mhlka_id],
[mhlka],
2,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL
FROM inserted
TNX
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Apr 11, 2001
I have an update trigger I created that updates a field based on the user who last updated the record. Under 7 the only way it would work was to have recursive triggers firing turned on. Under 2000 might there be a btter solution. The code is below. Thanks
CREATE trigger tr_cmsUpdt_MARS on dbo.PATIENT_MEDICATION_DISPERSAL_ for UPDATE as
-- updates record with sql user and timestamp
--created 11-28-00 tim cronin
DECLARE @muser varchar(35),
@rec_lock_status int,
@ptacpt_status int
set @muser = current_user
begin
UPDATE PATIENT_MEDICATION_DISPERSAL_
set MODIFIED_BY = @muser,
MODIFIED_TS = getdate()
from deleted dt
WHERE --DT.MODIFIED_BY <> 'DBO' AND
PATIENT_MEDICATION_DISPERSAL_.RECORD_ID = dt.RECORD_ID
end
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May 28, 2015
I have a after update trigger that calculates one of the columns based on other column values. It has to be a trigger and only fires an update statement against the table itself when the column has changed. At a simple level it is doing something similar to the code below
IF UPDATE(Col1)
update MyTable SET Col2 = Col1 WHERE Col2 <> Col1
It works everywhere except on one site where the trigger causes itself to recurse until it reaches the 32 level error. It can be fixed by checking whether there and any records in the inserted table at the top. Like so.
IF EXISTS (SELECT * FROM inserted)
begin
IF UPDATE(Col1)
update MyTable SET Col2 = Col1 WHERE Col2 <> Col1
end
However, I would like to know whether there is some system setting other than "nested triggers" that I am missing that would cause the behaviour.
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Nov 27, 2007
How can i write a trigger which gets fired for each row that is being deleted
i.e. Row level Trigger
I tried something like this
ALTER TRIGGER [dbo].[Del_Msg]
ON [Seat27].[dbo].[Email_Messages]
AFTER DELETE
&.......
it gets executed once for the triggering SQL statement
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Mar 25, 2004
Hi all
I am doing a DB porting project in which i need to translate oracle specific queries to sql server.I need to convert following trigger to sqlserver specific .Any help will be appreciated
CREATE OR REPLACE TRIGGER T_BI_R_TARGET_OBJECTIVE
BEFORE INSERT
ON TARGET_OBJECTIVE
REFERENCING OLD AS OLD NEW AS NEW
FOR EACH ROW WHEN (NEW.TARGET_OBJECTIVE_ID IN (NULL,0))
DECLARE
seq_id NUMBER;
BEGIN
SELECT TARGET_OBJECTIVE_ID_SEQ.NEXTVAL INTO seq_id FROM dual;
:new.TARGET_OBJECTIVE_ID := seq_id;
END;
Regards
sreenath
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Apr 26, 2004
Hi,
Is there any row-level trigger available in SQL server(in oracle is does)
my problem is ..I am trying to write a trigger which updates all the items
But it give me error:
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
The statement has been terminated.
My statement is : SET @var_item=(SELECT item_no FROM deleted)
How can i make it possible?
Note: I am trying convert Oracle trigger to SQL Server trigger
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Jan 11, 2008
Can I delete the record if it exist before we do an insert at the DataFlow level base on a key of the record we are working on? Basically we want to keep history records and delete and reinsert any records that exist in the table.
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Aug 3, 2006
Dear Freinds,
we are having an requirement to log the unauthorized backend update on database.Is there any other way ,apart from going and creating the triggers at each table to log the backend update.
Note :Is Database base level trigger is possible on SQL Server 2000?
Looking for your reply.
With Cheers :beer: ,
Sathesh.M
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Jul 18, 2006
hi
i want to know if row level trigger works with sql 2005.
because in 2000.. only statement level trigger was used.
Thks in advance.
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Jul 19, 2006
hi
actually i have a temporay table wich has four columns
say col_1,col_2,col_3,col_4.
so firstly i wud bulk insert from a text file wich mite contain thousands of rows.
then from this temp table col_1 and col_2 shd go to master_a.wich has an identiy column as primary key.
say id,col_1, col_2.
i will have another table detail_b where in there is a foreign key to the table master_a for id.
so it will have f_id, col_3,col_4.
so i am riting a trigger on master_a. so whenver row is inserted in master_a. coresponding id and col 3 col4 shd be inserted into detail_b.
For this in oracle we have row level trigger. where in for each insertion in master a .. correspoding trigger will fire but in sql 2000..
but i wud like to implemtn row level trigger..
can u hlep me out..
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May 19, 2008
I need to pass a application userid on every call to my database for triggers on the db to use.
I am connecting to my database using integrated security from my application, all on one windows domain account. However I need to get an application user id over on the connection for triggers to use to stamp in changelogs.
Currently everytime we open a connection we create a #table with the user id in it, but that is expensive, especially in our new SOA where connections are frequently created and dropped on requests.
Is there any way I can get a connection level variable over to the database server so triggers could read it?
Any help is greatly appreciated.
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Aug 25, 2015
Msg 240, Level 16, State 1, Line 14
Types don't match between the anchor and the recursive part in column "ParentId" of recursive query "tmp". Below is query,
DECLARE @TBL TABLE (RowNum INT, DataId int, DataName NVARCHAR(50), RowOrder DECIMAL(18,2) NULL, ParentId INT NULL)
INSERT INTO @TBL VALUES
(1, 105508, 'A', 1.00, NULL),
(2, 105717, 'A1', NULL, NULL),
(3, 105718, 'A1', NULL, NULL),
(4, 105509, 'B', 2.00, NULL),
(5, 105510, 'C', 3.00, NULL),
(6, 105514, 'C1', NULL, NULL),
[code]....
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Nov 29, 2007
Hi,we are executing the following query in a stored procedure using snapshot isolation level:DELETE FROM tBackgroundProcessProgressReportFROM tBackgroundProcessProgressReport LEFT OUTER JOIN tBackgroundProcess ON
tBackgroundProcess.BackgroundProcessProgressReportID =
tBackgroundProcessProgressReport.BackgroundProcessProgressReportID LEFT
OUTER JOIN tBackgroundProcessProgressReportItem ON
tBackgroundProcessProgressReport.BackgroundProcessProgressReportID =
tBackgroundProcessProgressReportItem.BackgroundProcessProgressReportIDWHERE (tBackgroundProcess.BackgroundProcessID IS NULL) AND (tBackgroundProcessProgressReportItem.BackgroundProcessProgressReportItemID IS NULL)The query should delete records from tBackgroundProcessProgressReport which are not connected with the other two tables.However, for some reasone we get the following exception:System.Data.SqlClient.SqlException:
Snapshot isolation transaction aborted due to update conflict. You
cannot use snapshot isolation to access table 'dbo.tBackgroundProcess'
directly or indirectly in database 'RHSS_PRD_PT_Engine' to update,
delete, or insert the row that has been modified or deleted by another
transaction. Retry the transaction or change the isolation level for
the update/delete statement.The exception specifies that we are
not allowed to update/delete/insert records in tBackgroundProcess, but
the query indeed deletes records from tBackgroundProcessProgressReport,
not from the table in the exception.Is the exception raised because of the join?Has someone encountered this issue before?Thanks,Yani
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Jul 23, 2005
I am having problem to apply updates into this function below. I triedusing cursor for updates, etc. but no success. Sql server keeps tellingme that I cannot execute insert or update from inside a function and itgives me an option that I could write an extended stored procedure, butI don't have a clue of how to do it. To quickly fix the problem theonly solution left in my case is to convert this recursive functioninto one recursive stored procedure. However, I am facing one problem.How to convert the select command in this piece of code below into an"execute" by passing parameters and calling the sp recursively again.### piece of code ############SELECT @subtotal = dbo.Mkt_GetChildren(uid, @subtotal,@DateStart, @DateEnd)FROM categories WHERE ParentID = @uid######### my function ###########CREATE FUNCTION Mkt_GetChildren(@uid int, @subtotal decimal ,@DateStart datetime, @DateEnd datetime)RETURNS decimalASBEGINIF EXISTS (SELECTuidFROMcategories WHEREParentID = @uid)BEGINDECLARE my_cursor CURSOR FORSELECT uid, classid5 FROM categories WHERE parentid = @uiddeclare @getclassid5 varchar(50), @getuid bigint, @calculate decimalOPEN my_cursorFETCH NEXT FROM my_cursor INTO @getuid, @getclassid5WHILE @@FETCH_STATUS = 0BEGINFETCH NEXT FROM my_cursor INTO @getuid, @getclassid5select @calculate = dbo.Mkt_CalculateTotal(@getclassid5, @DateStart,@DateEnd)SET @subtotal = CONVERT (decimal (19,4),(@subtotal + @calculate))ENDCLOSE my_cursorDEALLOCATE my_cursorSELECT @subtotal = dbo.Mkt_GetChildren(uid, @subtotal,@DateStart, @DateEnd)FROM categories WHERE ParentID = @uidENDRETURN @subtotalENDGORod
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Sep 23, 2015
i use a single stored procedure to update many tables in sql server 2014 database, using defalut transaction isolation level we got random performance issues.
maybe it would better to use read uncommitted isolation level?
what's happens ,in the both cases( read committed, uncommitted) if the sp is called at the same time passing the same @key parameter?
this is a sample to show of the real stored procedure works:
CREATE PROCEDURE SP_Test
@Key int,
@Values1 Values1 readonly,
@Values2 Values2 readonly,
@Values3 Values3 readonly
[code]....
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Jul 17, 2001
Hello all.
First of all, I've been a reader of swynk.com for quite sometime now, and I'd like to say 'thank you' to everyone who contributes.
Today, I'm the town moron.. haha I'm having issues with column level constraints. I have a varchar(50) where I want to keep *,=,#,/, .. etc, OUT OF the value input. I don't want to strip them. I simply want for sql to throw an error if the insert contains those (and other characters). The only characters that I want in the column are A-Z and 0-9. However, it's not a set number of characters per insert. It always varies... There has to be an easier way to do this than creating a constraint for every possibilty... Any help would be greatly appreciated.
tia,
Jeremy
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Aug 3, 2005
Hi all,
I have writen a Function which call's the same function it self. I'm getting the error as below.
Maximum stored procedure, function, trigger, or view nesting level exceeded (limit 32).
Can any one give me a solution for this problem I have attached the function also.
CREATE FUNCTION dbo.GetLegsFor(@IncludeParent bit, @EmployeeID float)
RETURNS @retFindReports TABLE (EmployeeID float, Name nvarchar(255), BossID float)
AS
BEGIN
IF (@IncludeParent=1)
BEGIN
INSERT INTO @retFindReports SELECT MemberId,Name,referredby FROM Amemberinfo WHERE Memberid=@EmployeeID
END
DECLARE @Report_ID float, @Report_Name nvarchar(255), @Report_BossID float
DECLARE RetrieveReports CURSOR STATIC LOCAL FOR
SELECT MemberId,Name,referredby FROM Amemberinfo WHERE referredby=@EmployeeID
OPEN RetrieveReports
FETCH NEXT FROM RetrieveReports INTO @Report_ID, @Report_Name, @Report_BossID
WHILE (@@FETCH_STATUS = 0)
BEGIN
INSERT INTO @retFindReports SELECT * FROM dbo.GetLegsFor(0,@Report_ID)
INSERT INTO @retFindReports VALUES(@Report_ID,@Report_Name, @Report_BossID)
FETCH NEXT FROM RetrieveReports INTO @Report_ID, @Report_Name, @Report_BossID
END
CLOSE RetrieveReports
DEALLOCATE RetrieveReports
RETURN
END
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May 29, 2002
Hello,
I am running this query
"delete from ims_domains where id=61"
and got the error
Maximum stored procedure, function, trigger, or view nesting level exceeded (limit 32)
Please let me know what should be the reason?
Thanks,
Ravi
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Dec 1, 2004
Hi,
I face this error when i try to run my store procedure.
The sample of store procedure as following:
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
CREATE PROCEDURE sp_addUserAccess
with encryption
AS
SET NOCOUNT ON
DECLARE @COUNTER INT
SET @COUNTER = 0
DECLARE @i_compId INT
BEGIN
DECLARE C1 SCROLL CURSOR FOR
SELECT i_compId
FROM ltd_cms_company WHERE (i_owner = 176 or i_owner = 268) AND ti_recStatus = 1
END
OPEN C1
FETCH ABSOLUTE @COUNTER FROM C1 INTO
@i_compId
WHILE @@FETCH_STATUS = 0
BEGIN
INSERT INTO ltd_cms_userAccess ( i_loginId, i_groupId, i_compId, ti_updComp, ti_updLog, ti_updAccess, ti_owner, ti_acctMgr, ti_updContact, ti_updEvent )
VALUES ( 124, 0, @i_compId, 1, 1, 1, 1, 1, 1, 1)
SET @COUNTER = @COUNTER + 1
FETCH ABSOLUTE @COUNTER FROM C1 INTO
@i_compId
END
CLOSE C1
DEALLOCATE C1
SET NOCOUNT OFF
anyone can help me identify this error?
Thanks
Regards,
Jojomay
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