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Merge search parameters for derived view to other 3 underlying views

Hello, I have following tree view: View / | \ View1 View2 View 3 | | | BV BV BV | | | DS DS DS The DS is a Web Service Datasource...

Denodo 7.0 VQL search methods join Derived views

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Dynamic Base View based on another Base view (not JOIN)

Hi, I need help with a very specific use case. I have 2 different data sources and I need to create a base view from source A filtered by some values from another base view coming from source B. This values in the second view would be a hole column, ...

Dynamic Interpolation Variables Create Base View join

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Join condition on delimited files

Hi Team, I want to join 2 views.First view is created from Json file and second view is created from delimited files(Text Files) I need to join both of them on basis of one coloumn. This column can be easily written by specifying view name and then ...

join

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Poor performance for jdbc and json array type join

Hi, I observered a poor performance for a join between a jdbc type view and json array. individually when queried they are running fast but when we do a join it's performance degrades. Can you suggest how to improve performance ? Also i see 347 subp...

performance JSON join

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Denodo Disparat sources join without Cache.

Hi Guys, I am new to Denodo. I have installed Express edition on my laptop and running a sample task. I have two disparate data sources (Postgres and MySQL), Postgres has agents table while MySQL has Customer and Orders data. When I execute a join ...

join Cache

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Different Hashes for same values hash()

Can anyone please help me understand how hash() function generates different results for same string input? Tables are different but the source is same, i.e. Postgres DB. because if this is the case, then join won't work on string columns, and it ...

join hash

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Join attributes of different (compatible) types across different data sources

Hallo Denodo Team, Suppose you need to join tables from different data sources (say Oracle and Teradata). Suppose the matching should happen between attributes that have different data types (say VARCHAR(N) on one side, NVARCHAR(m) on the other side, ...

join datatypes

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How do I concatenate two columns and use them in the join?

Hi Team, I would like to know, how would I perform the below join condiiton in VDP, how do I concatenate two columns to use them in the join operation. table_a a LEFT JOIN table_b b on a.column_a = concat(b.column_b1,b.column_b2) Regards, Shafeeq

join

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Meaning of the join arrow's direction in a join view

When joining two or more views (as source) together in a join view, Denodo will draw an arrow between the tables. The arrow's direction seems to depend on how you "draw" the line, i.e. from which table you start. Is there any "deeper" meaning to this ...

join

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Join type mismatch

We have an issue with database tables having different primary key types (numeric / character). There is a performance hit on the database side when these occur. is there any way for denodo to help identify when a type mismatch occurs when creating or ...

join