hdb | hdb

 by   ansuz JavaScript Version: Current License: AGPL-3.0

kandi X-RAY | hdb Summary

kandi X-RAY | hdb Summary

hdb is a JavaScript library. hdb has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

HDB is a webserver that exposes some information about your cjdns node and performs some background tasks.
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            kandi-support Support

              hdb has a low active ecosystem.
              It has 19 star(s) with 3 fork(s). There are 1 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 3 open issues and 1 have been closed. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of hdb is current.

            kandi-Quality Quality

              hdb has no bugs reported.

            kandi-Security Security

              hdb has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              hdb is licensed under the AGPL-3.0 License. This license is Strong Copyleft.
              Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

            kandi-Reuse Reuse

              hdb releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.

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            hdb Key Features

            No Key Features are available at this moment for hdb.

            hdb Examples and Code Snippets

            No Code Snippets are available at this moment for hdb.

            Community Discussions

            QUESTION

            HanaDB - Complexity of: SELECT COUNT( * ) FROM dbtab
            Asked 2021-Apr-04 at 01:18

            This question is the same as MySQL - Complexity of: SELECT COUNT(*) FROM MyTable;.

            The difference is that instead MySQL i want to know the answer for HDB.

            I Googled it, and looked for it in SAP Knowledge Base without finding an answer.

            To clarify: The question is regarding selecting count without any additional conditions:

            ...

            ANSWER

            Answered 2021-Apr-04 at 01:18

            HANA supports a large variety of table types, e.g. ROW-, COLUMN-, VIRTUAL-, EXTENDED-, and MULTISTORE-tables come to mind here.

            For some of those, the current raw record count is kept as part of the internal storage structures and does not need to computed upon query time. This is specifically true for ROW and COLUMN tables.

            VIRTUAL tables are on the extreme other end and behave a lot more like complex views when it comes to SELECT count(*). Depending on the DB "behind" the virtual table, the performance of this can vary wildly!

            Also, be careful assuming that ROW and COLUMN store tables will return the information with nearly no effort. HANA is a shared-nothing distributed database (in scale-out setups), which means that this kind of information is only known to the node that a table is located on. Finding out the row count of, e.g. a partitioned table with X partitions on Y number of nodes can take a considerable amount of time!

            Finally, this raw record count is only available for tables that are currently in memory. Running a SELECT count(*) on a table that is currently unloaded will trigger the load of the columns that are required to answer that query (basically all primary key columns + some internal table management structures).

            In the ideal case (a column table, loaded to memory and all partitions on a single node) this query should return instantaneous; but the other mentioned scenarios need to be considered, too.

            Hope that answers the rather broad question.

            Source https://stackoverflow.com/questions/66795693

            QUESTION

            BDE dbidorestructure returns empty table
            Asked 2021-Mar-26 at 05:23

            In my (Delphi Sydney, Win 10) application I use BDE (yes even today). I want to modify its existed (Paradox) tables when I change/alter/drop fields. I found a freeware component (TFieldUpdate v1.1, by Nathanial Woolls) that works except that it can't drop fields and works for a field at a time. So I found here (http://www.delphigroups.info/2/5a/37309.html) another code snipet that hasn't these limitations. I modified it as bellow

            ...

            ANSWER

            Answered 2021-Mar-24 at 17:28

            I got nowhere trying to correct your code even after spending several hours on it, so I started again from scratch. I think you will find that the code below correctly removes a field from a TTable while retaining the correct contents of the remaining record fields.

            The DeleteField routine is a stand-alone procedure, but you should find it straightforward to integrate with your existing code. If you want to add or modify fields, I suggest that you start from Mr Sprenger's code as posted in the link. Personally, if I were you I would abandon your RestructureTable as I don't think it is salvageable, I'm afraid.

            My Main form has a TTable named DestTable, a DBGrid and a Datasource connected up as you would expect. I then add the code below.

            Source https://stackoverflow.com/questions/66734885

            QUESTION

            kdb: getting one row from HDB
            Asked 2021-Mar-07 at 22:43

            For a normal table, we can select one row using select[1] from t. How can I do this for HDB?

            I tried select[1] from t where date=2021.02.25 but it gives error

            Not yet implemented: it probably makes sense, but it’s not defined nor implemented, and needs more thinking about as the language evolves

            ...

            ANSWER

            Answered 2021-Feb-28 at 03:34

            select[n] syntax works only if table is already loaded in memory. The easiest way to get 1st row of HDB table is:

            Source https://stackoverflow.com/questions/66405548

            QUESTION

            Oracle query- How subtract or add days in the given date
            Asked 2021-Feb-28 at 20:58
            SELECT * From HDB.MDTA E WHERE E.MODIFIED_DAY_KEY BETWEEN TO_CHAR(${pEND_DATE}, 'YYYYMMDD') AND  TO_CHAR(${pEND_DATE}, 'YYYYMMDD') 
            
            ...

            ANSWER

            Answered 2021-Feb-28 at 20:58

            If I got it right, you need to change the upper date of "BETWEEN" clause.

            In this case that clause might look like this

            Source https://stackoverflow.com/questions/66413649

            QUESTION

            most performant way to get asof price given a list of timestamps
            Asked 2021-Jan-25 at 11:39

            I have a list of timestamps spanning multiple dates ( no sym, just timestamps). These can be 1000/2000 at times, spanning multiple dates.

            What's the most performant way to hit an hdb and get the closest price available for each timestamp?

            select from hdbtable where date = x -> can be over 60mm rows.

            To do this for each date and then an aj on top is very poor.

            Any suggestions are welcome

            ...

            ANSWER

            Answered 2021-Jan-25 at 11:39

            The most performant way to aj, assuming the HDB follows the standard conventions of date-partitioned with `p# attribute on sym, is

            Source https://stackoverflow.com/questions/65848896

            QUESTION

            using .Q.dpft function to resave table
            Asked 2020-Nov-30 at 13:06

            I am trying to load the data for each date and then sort the sym column and apply the parted attribute. But I don’t know how to use the .Q.dpft function to save to the same table?

            There is a trade table in hdb. Here is my function:

            ...

            ANSWER

            Answered 2020-Nov-28 at 01:44

            I think you need to pass the table trade & dbdir as arguments to your function since you're referencing them inside the function.

            Source https://stackoverflow.com/questions/65044905

            QUESTION

            sort data in hdb by using dbmain.q in kdb
            Asked 2020-Nov-30 at 01:22

            I am trying to sort 1 or 2 columns in a hdb in kdb but failed. This is the code I have

            ...

            ANSWER

            Answered 2020-Nov-27 at 19:43

            Is there any indication of what date is failing with a length error? It could be something wrong with one of the partitions.

            Perhaps if you try to load one of the dates into memory and sort it manually IE

            Source https://stackoverflow.com/questions/65042450

            QUESTION

            Add Liquibase extension to Keycloak
            Asked 2020-Nov-02 at 09:10

            I am trying to use the Keycloak docker image with a non-standard database (HANA-DB).

            Modifying the configuration as described in the documentation worked fine and keycloak connects to the database. The remaining problem seems to be that the Liquibase migrations can not run because Liquibase does not know how to handle HANA-DB out of the box.

            Of course, there is an extension library (https://mvnrepository.com/artifact/org.liquibase.ext/liquibase-hanadb/4.0.0) that adds this capability to Liquibase. Now my question: How do I get Keycloak's Liquibase to use this library?

            I already tried:

            • Packaging the library into its own module and adding a dependency to it in Keycloak's Liquibase module
            • Adding the library as a second resource-root to Keycloak's Liquibase module

            Both did not work, i.e. Liquibase is still not recognizing the "HDB" database.

            What would be the correct way to do this?

            ...

            ANSWER

            Answered 2020-Aug-26 at 14:26

            It turns out, that adding the library as a second resource-root in Keycloaks's liquibase module is actually working. It does not get loaded because Keycloak removes liquibase.ext from the service loader used to find liquibase extensions.

            This can be worked around by using the liquibase.scan.packages system property, though.

            For all those trying to make Keycloak working with HANA:

            • Overriding the liquibase.scan.packages system property causes the library to be loaded
            • Now, a class (LoggingService) from liquibase that is referenced in the liquibase-hanadb library, can not be found because it was introduced in liquibase 3.6 and Keycloak comes with 3.5.5.
            • When hacking a more recent version of liquibase (3.6.0) into Keycloak's modules, for some reason a changeset only intended for DB2 is being run, causing errors. I suspect an incompatibility between Keycloak's changelogs and the updated liquibase version.

            I gave up at this point.

            Source https://stackoverflow.com/questions/63594839

            QUESTION

            Adjust Fuzziness Level in Percentage in ElasticSearch
            Asked 2020-Aug-10 at 14:19

            I'm working on a project in which I'm using like mine filter, Whenever user will click this he'll get all comments matching with his/her Text(words) My own document is as follows:

            ...

            ANSWER

            Answered 2020-Aug-10 at 14:19

            Fuzziness is interpreted as a Levenshtein Edit Distance — the number of one character changes that need to be made to one string to make it the same as another string.

            So "sleeping" will match with "seeing" as their is difference of only one character Fuzziness above 2 edit distance is not supported. So value for fuzziness can be only 1 and 2 so it doesn't make sense to allow percentage.

            Check this comment in this issue

            In all cases the behaviour of fuzziness can be reduced to two integers (as fuzziness above 2 isn't supported anyway): the threshold at which it becomes 1, and at which it becomes 2. Percentage fuzziness used to be supported but was removed, presumably because it suggested that there was more flexibility when really it was just being turned into two thresholds.

            Are you suggesting that it should be customisable at the query level, rather than in configuration? If so, some thought would probably need to be put into the syntax, as there could be confusion between settings that define the fuzziness and those that define the length thresholds for fuzziness, which are both integers.

            Source https://stackoverflow.com/questions/63336654

            QUESTION

            How to map objects in state to a dynamic list in reactJS
            Asked 2020-Aug-04 at 15:29

            As of my current knowledge now, I know that you can map an array from state to HTML elements and can make an array of elements that can repeat itself over and over again. However, is that any way for me to do the same but to map out items into a list so I can dynamically populate my dictionary?

            So what I want is to have this:

            ...

            ANSWER

            Answered 2020-Aug-04 at 15:29

            Try to populate an array before set the state like

            Source https://stackoverflow.com/questions/63249841

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

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            You can download it from GitHub.

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