I need to get the list of columns in a select using the JOOQ SQL parser. In the example below it would return the list with two entries: 'sk' and 'aa'. Debugging the program I can see in the Query.select field the list of columns, but I cannot find in the Query class a method to retrieve them. How to get the list of columns?
The Query object model returned by the jOOQ parser API does as of jOOQ 3.12 not provide any corresponding accessors. This feature is however planned for the next minor release (3.13).
The following answer gives you an example how you might be able to use the existing VisitListener SPI to achieve your goal: https://stackoverflow.com/a/54006668/1732086.
Related
Also posted on super users:
I'm a spotfire novice trying to create a parameterized info link. Ultimate goal is to create a default template that may be customized to return specific rows in a very large table. I've not been able to cobble together enough information from online searches to get me from point A to Z.
Spotfire version is 7.11 on an Oracle 11.2 SE DB.
Currently I've got a date/time prompt in the info link that will be global to all users. What I need is to be able to further filter to 1 of 2 columns (one is real, the other a string) in order to minimize loading times. There are 17 other on-demand tables that are related to the main one. Limiting the initial query will greatly speed up performance.
In information designer for the information link, if I edit the SQL in the WHERE and explicitly define the value or string for the column, I get the rows I want. When I try to define it using an input parameter (?ParamName), I either get nothing when I reload or get asked to input a parameter "for testing".
Q1: In the document properties for the analysis, I've been adding in properties that I assume is supposed to get picked up by the query.
- What part do scripts play in passing this variable to the SQL?
- Do I just need to define a value for a property name or include a IronPython script? - If script is required, can I just define the parameter to pass?
Q2: In the info link SQL, what is the correct syntax for defining the parameter variable depending on the type (real v string)? If I use a string, I need to include LIKE in order to pick up the desired rows. If I use a real, is it possible to define it as a list of values?
Thanks in advance.
Though not exactly clear from your description, I think you should be able to accomplish your goals using the "Load on demand" dialog that is accessed either when you add your data table to your analysis, or subsequently using the Data Table Properties>Type of Data>Settings dialog.
Spotfire uses this dialog to dynamically modify your SQL. Thus, you do not need to explicitly include the LIKE statement in your SQL. Spotfire will add it in based on what you define in the On-Demand settings. For example, you could have an Input Field where you type a constraint that will be stored as a Document Property and then refer to that Document Property in your On-Demand settings to control the table loading.
I currently maintain rfc function modules to be called via Java Connector for SAP. My current module returns a table of documents, where each line has some data and another table of items.
When introspecting this module via JCo 3.0, it does only show the top layer table, but not the one inside:
POSITIONS () (com.sap.conn.jco.JCoTable)
introspection errror
java.lang.IllegalStateException: Trying to access row values in a table
which does not have any rows yet
The inner table is defined. For performance purposes, I enabled the module to use basXML.
How can I enable JCo to work with nested structures? Or is this not possible?
In general this works. JCo is capable of dealing with nested structures and tables.
In this case your nested JCoTable simply seems to be empty, i.e. it has no rows.
On an empty table you cannot call any getter- or setter-method for a single field.
Simply check with JCoTable.isEmpty() or with JCoTable.getNumRows()>0 before using any getter-method. And make sure to append at least one row with JCoTable.appendRow() before using any setter-method on a JCoTable object.
Folks, I was wondering what is the best way to model document and/or map functions that allows me "Not Equals" queries.
For example, my documents are:
1. { name : 'George' }
2. { name : 'Carlin' }
I want to trigger a query that returns every documents where name not equals 'John'.
Note: I don't have all possible names before hand. So the parameters in query can be any random text like 'John' in my example.
In short: there is no easy solution.
You have four options:
sending a multi range query
filter the view response with a server-side list function
using a CouchDB plugin
use the mango query language
sending a multi range query
You can request the view with two ranges defined by startkey and endkey. You have to choose the range so, that the key John is not requested.
Unfortunately you have to find the commit request that somewhere exists and compile your CouchDB with it. Its not included in the official source.
filter the view response with a server-side list function
Its not recommended but you can use a list function and ignore the row with the key John in your response. Its like you will do it with a JavaScript array.
using a CouchDB plugin
Create an additional index with e.g. couchdb-lucene. The lucene server has such query capabilities.
use the "mango" query language
Its included in the CouchDB 2.0 developer preview. Not ready for production but will be definitely included in the stable release.
I'm starting to do some test on SubSonic 3 and I'm missing some stuff.
1st: Where's the Table names constants? The place where we could ask for the same of a certain table using intelisense...
2nd: Same as the above but for the table columns... where are they?
This is very useful mostly when you need to pass those names as string... it you need to refactor your DB we don't need to look through all the code to find where was I using that column!! Once you re-generate the code the compiler tells you!
3rd: Now how can I perform an ExecuteReader on a certain table like I'm used to on 2.x through the Query object? I used this a lot for list where I really don't need the business objects (BO) overhead... When I needed a BO (for showing a grid row details) I create it from the row itself...
I'm using ActiveRecord btw...
Thanks guys!
Alex
1st: Where's the Table names constants? The place where we could ask for the same of a certain table using intelisense...
In Structs.tt find the following line of code at line 47:
<# foreach(var col in tbl.Columns){#>
Add the following code above it:
public static string TableName { get { return "<#=tbl.Name#>"; } }
Now you'll have a property that returns the name of the table.
2nd: Same as the above but for the table columns... where are they?
In the generated Structs.cs file, this is included in the 3.0.0.3 version
3rd: Now how can I perform an ExecuteReader on a certain table like I'm used to on 2.x through the Query object? I used this a lot for list where I really don't need the business objects (BO) overhead... When I needed a BO (for showing a grid row details) I create it from the row itself...
If you're using SqlQuery object you can call ExecuteReader on it. Alternatively you can use Linq syntax to generate return custom shaped objects and they'll get mapped automatically.
1st and 2nd: It's not implemented in the default tt-files.
A similiar question:
SubSonic 3 Simple Query Tool
Problem is that's not a correct implementation if you want the 2.x way - the XColumn properties used to be column objects and not string constants, those were found under the Columns struct. So I hope that check-in will not be accepted and that someone will 2.x-ify it correctly.
Anyway as you can see it seems pretty easy to fix it on your own.
I did some searching and see that ExecuteJoinedDataSet will not work with the Where clause in 2.1. If I want to query a table with WHERE, but want the FK objects values to be bindable is the easiest way to just create a custom class(my table has tons of FK references).
Could you give us an example of what kind of query you are trying to write? If you are just trying to return a DataTable without creating a custom class just write your query and use the ExecuteReader which Returns an IDataReader. The IDataReader is bindable and if you need more you can just load it into a DataTable.