Develop Reference

How to update multiple rows using a single query with a mutable colletion

I want to update rows on a table which contains the following colums:
`parameter_name`(PRIMARY KEY),
`option_order`,
`value`.
I have a collection called parameterColletion which contains "parameterNames", "optionOrders" and "values". This collection does not have a fixed value, it can receive the quantity of parameters you want to.
Imagine I have 5 parameters inside my collection (I could have 28, or 10204 too) and I am trying to update the rows of the database using the next query. Example of query:
UPDATE insight_app_parameter_option
SET option_order IN (1,2,3,4,5), value IN ('a','b','c','d','e')
WHERE parameter_name IN ('name1', 'name2', 'name3', 'name4', 'name5')
But this isn't doing the job, instead it gives back an error which says You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'IN (1,2,3,4,5), value IN ('a','b','c','d','e') WHERE parameter_name IN ('name1'' at line 2
1,2,3,4,5 -> Represent the option orders inside parameterCollection.
'a','b','c','d','e' -> Represent the values inside parameterCollection.
'name1', 'name2', 'name3', 'name4', 'name5' -> Represent the names inside parameterCollection.
I know how to update each parameter by separate but i would like to do it all together. Here are some links I visited where people asked the same question but they used a fixed colletion of objects, not a mutable one.
MySQL - UPDATE multiple rows with different values in one query
Multiple rows update into a single query
SQL - Update multiple records in one query

That's not possible with MySQL. The error you are receiving is a syntax error. You are not able to set multiple values at once. This is the correct syntax to a UPDATE statement: (ref)
UPDATE [LOW_PRIORITY] [IGNORE] table_reference
SET assignment_list
[WHERE where_condition]
[ORDER BY ...]
[LIMIT row_count]
value:
{expr | DEFAULT}
assignment:
col_name = value
assignment_list:
assignment [, assignment] ...
You need to create separate UPDATEs for each row. I suggest executing all in a single transaction, if its the case.
The correct syntax for your example is:
UPDATE insight_app_parameter_option
SET option_order = 1, value = 'a'
WHERE parameter_name = 'name1';
UPDATE insight_app_parameter_option
SET option_order = 2, value = 'b'
WHERE parameter_name = 'name2';
UPDATE insight_app_parameter_option
SET option_order = 3, value = 'c'
WHERE parameter_name = 'name3';
...

How to modify fieldgroup save function?

I created a page to insert and modify data of an existing mysql- table.
But based on my requirements and the structure of the table I have to modify the sql for inserting data.
Because I am completly new on rapidclipse and java I need some hints/ examples how and where to modify this.
Looking all rapidclipse videos did not give the right hint.
I would like to insert three fields into a mysql-table
One of the fields I have to edit manualy.
The second field contains always the same value.
The third field contains a calculated value, which I have to fetch while runtime from the database.
As sql I would use following code:
INSERT INTO OKM_DB_METADATA_VALUE (DMV_TABLE, DMV_COL00, DMV_COL01)
VALUES ('T_supplier', (select * from (select max(cast(DMV_COL00 as
Integer)) +1 from OKM_DB_METADATA_VALUE as t2 where DMV_TABLE =
'T_supplier') as t3 ) , 'new suppliername');
The value for field DMV_Table will be always 'T_supplier'
The value for field DMV_COL00 is always the highest value in the col +1
The value for field DMV_COL01 will be always entered manually
(I am not able/ I don't want to modify/ use table form, -design and trigger, because it is a original table of OpenKM)
Thank you in advance!
best regards
OpaHeinz

Just a suggestion for sql code .. Your code could be refactored in a more SQL like code .. You could avoid the innner subquery .. and use a normal insert select
INSERT INTO OKM_DB_METADATA_VALUE (DMV_TABLE, DMV_COL00, DMV_COL01)
select 'T_supplier', max(cast(DMV_COL00 asInteger)) +1 , 'new suppliername'
from OKM_DB_METADATA_VALUE
where DMV_TABLE ='T_supplier'

The first step to solution
In the buttonClick event of save function
I set the value of DMV_Table field with:
... this.txtDmvTable.setValue("T_supplier");
The second step;
I created a view in the database wich delivers only the expected value:
`CREATE
OR REPLACE
VIEW `okmdb`.`V_suppliers_newID` AS
select
1 as "id",
max(cast(DMV_COL00 as Integer)) +1 as "newSupId"
from OKM_DB_METADATA_VALUE
where DMV_TABLE = 'T_supplier'; `
After that I created an entity in rapidclipse, read the value out of the view and assigned it to the other field DMV_COL00.
This was all.

Using SQL stored procedure can we get the following output? or handle it within the code itself?

Image 1 is the current data,
Image 2 is the data i need to store into a new table. Thing is i want to combine all the same ITEM_NO and put it as a comma separated value and insert into a new table.

Whilst I don't think storing data like this is a good idea at all (see what others have said in the comments) it is possible by doing:
SELECT REFERENCE_NO,
ITEM_NO,
ROLES = STUFF((SELECT N', ' + ENTITY_ROLE
FROM dbo.MyTable AS p2
WHERE p2.ITEM_NO = p.ITEM_NO
ORDER BY ENTITY_ROLE
FOR XML PATH(N'')), 1, 2, N'')
FROM dbo.MyTable AS p
GROUP BY REFERENCE_NO, ITEM_NO
ORDER BY ITEM_NO;
A demo of this in action: SQL Fiddle

DB2 jdbc execute function error [duplicate]

I'm using the statement below to update/insert some data to a table and, if I run it without parameters, it's fine. However, as soon as I try to execute it using parameters it throws:
SQL0418N - A statement contains a use of an untyped parameter marker, the DEFAULT keyword, or a null value that is not valid.
I've read the error information here, but I'm still struggling with why my statement won't execute.
--This statement works
MERGE Into AB.Testing_Table A
USING (VALUES('TEST', 'P')) B(TEST_ID, "ACTION")
ON (A.TEST_ID = B.TEST_ID)
WHEN NOT MATCHED THEN
INSERT (TEST_ID, "ACTION")
VALUES ('TEST', 'P')
WHEN MATCHED THEN
UPDATE SET TEST_ID = 'TEST'
,"ACTION" = 'P';
--This statement fails with error SQL0418N
MERGE Into AB.Testing_Table A
USING (VALUES(#TEST, #ACTION)) B(TEST_ID, "ACTION")
ON (A.TEST_ID = B.TEST_ID)
WHEN NOT MATCHED THEN
INSERT (TEST_ID, "ACTION")
VALUES (#TEST, #ACTION)
WHEN MATCHED THEN
UPDATE SET TEST_ID = #Test
,"ACTION" = #Action;
Thanks in advance for the help!

Basically, DB2 doesn't know what data types you're sending in on those parameters. I'm guessing you're either on an older version of DB2 (less than 9.7 on Linux/Unix/Windows, or on a Mainframe version older than 10.1), which doesn't do a whole lot of "automatic" type conversion. Or you're sending in NULL values (which still have to be "typed", strange as it sounds).
You can fix the problem by creating your parameter markers as typed parameters (I'm assuming data types here, use what would be appropriate):
MERGE INTO AB.TESTING_TABLE A
USING (VALUES (
CAST(#TEST AS CHAR(4))
,CAST(#ACTION AS CHAR(1))
)) B(TEST_ID, "ACTION")
ON (A.TEST_ID = B.TEST_ID)
WHEN NOT MATCHED THEN
INSERT (TEST_ID, "ACTION")
VALUES (B.TEST_ID, B.ACTION)
WHEN MATCHED THEN
UPDATE SET "ACTION" = B.ACTION
Additionally, since you're using the MERGE, you don't have to use parameters in the UPDATE or INSERT parts, you can refer to the values in the USING table you passed in. Also, since you're matching on TEST_ID, you don't need to include that in your UPDATE statement, since it wouldn't be updated, anyway.

MySQL enum datatype access in clojure

I am trying to write a simple application which reads the a database and produces a set of functions with which to access it; so far so good. Now, what I have come across is that some of the columns in my database are defined as MySQL enum types (e.g. ENUM('red','green','violet')) and I would like to validate the stuff I send to the database rather than receive an error from the driver when an unacceptable value is given, so I was wondering if there is a way to retrieve the possible values for the enum from within clojure.
I am using [clojure.java.jdbc "0.3.0-alpha5"] and [mysql/mysql-connector-java "5.1.25"]. In order to get the metadata for the table I am currently using java.sql.DatabaseMetaData, but trying .getPseudoColumns just gives me nil every time.

Turns out there is no straight forward way to do this using libraries. My own solution is:
(defn- parse-enum
"Parses an enum string and returns it's components"
[enum-str]
; "enum('temp','active','canceled','deleted')"
(map (comp keyword #(.replace % "'" ""))
(-> enum-str
(.replaceFirst "^[^\\(]+\\(([^\\)]+)\\)$" "$1")
(.split "'?,'?"))))
(defn get-enum-value
"Returns the values for an enum in a table.column"
[table column]
(jdbc/with-connection db
(jdbc/with-query-results rs
[(str "show columns from " table " where field = ?") column]
((comp set parse-enum :type first) rs))))