query about avatica odbc

possible, thanks a lot, yours best regards victor lv

query about Clob Blob sql support of avatica and calcite

, yours best regards victor lv

two avatica bugs

Unhandled type in Frame: class oracle.sql.CLOB [SQL State=0, DB Errorcode=-1] 1 statement failed. please confirm the above two bugs, and let me know when to fix them, thanks a lot. Best regards. Victor Lv

two avatica bugs

Errorcode=-1] 1 statement failed. please confirm the above two bugs, and let me know when to fix them, thanks a lot. Best regards. Victor Lv

Limit Through Union and Infinite Planning Loops

Hello! We've been attempting to implement a simple optimization rule in which we duplicate a limit through a UNION ALL to reduce the amount of data we need to fetch for a query. Starting from something like ``` LogicalSort[fetch = 10] LogicalUnion[all=true] ``` We're trying to turn i

Re: Limit Through Union and Infinite Planning Loops

erty to an equivalence set that r belongs to. > > Julian > > > > > On Sep 3, 2024, at 4:22 AM, Stamatis Zampetakis > wrote: > > > > Hey Victor, > > > > In general it is best to avoid stateful rules but in some cases it may > > be unavoidabl

Calcite - Spark Adapter

Hello everybody, At first I would like to introduce my self to the developers list. My name is Victor and I am an undergraduate computer science student. Currently I am doing some research on query optimization. I am quite new to Calcite project and I am facing some issues. My major problem is

HepPlanner: Optimal Plan Generation

src/main/java/org/apache/calcite/prepare/PlannerImpl.java> as examples and there are some classes or overrided methods which I currently use as “black boxes”. Here is a link with the code of my basic class: http://pastebin.com/HysfNa8S. -- Victor Giannakouris - Salalidis LinkedIn: http:/

Re: HepPlanner: Optimal Plan Generation

Milinda, Jesus Thank you very much for your help, I followed your advice and now everything seems to work well. But the problem I have now is that in case of adding many rules the planning is very slow. May you know why is that occurring? Best, Victor On Thu, Feb 18, 2016 at 8:21 PM, Jesus

Re: HepPlanner: Optimal Plan Generation

Hi Jesús, Thank you very much for the response, I will check this out. Best, Victor On Tue, Feb 23, 2016 at 2:27 PM, Jesus Camacho Rodriguez < jcamachorodrig...@hortonworks.com> wrote: > Hi Victor, > > The time taken to generate the optimize plan will depend on the size of >

Add Custom Statistics

filters or join intermediate results. -- Victor Giannakouris - Salalidis LinkedIn: http://gr.linkedin.com/pub/victor-giannakouris-salalidis/69/585/b23/ Personal Page: http://gsvic.github.io

Re: Add Custom Statistics

Hi Julian, Thank you for the quick response. These days I am working on the classes you mention at your reply. If I come up with some different implementation I will share it for sure. Best, Victor On Wed, Feb 24, 2016 at 11:24 PM, Julian Hyde wrote: > What you call “statistics” Calc

[jira] [Created] (CALCITE-6451) Improve Nullability Derivation for Intersect and Minus

Victor Barua created CALCITE-6451: - Summary: Improve Nullability Derivation for Intersect and Minus Key: CALCITE-6451 URL: https://issues.apache.org/jira/browse/CALCITE-6451 Project: Calcite