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Vertica and upgrading Grafana v7 to v9

  • June 19, 2023
  • 6 replies
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bmurrell
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I've got a new Grafana server running v9, and now installed the grafana plugin. Previously, I was using SQL Server linked servers to hop to Vertica.

Trying to go to Vertica directly is problematic.

1) I have an sql with "time BETWEEN $__timeFrom() and $__timeTo()", but it just doesn't work. I get an error "macro __timeFrom should have no arguments". I've tried all combinations. The only thing that works is to replace with "$__timeFilter(time)", which works in this case, but not others.

2) I also use the following : -

SELECT
CASE
WHEN '$granularity' = 'min' THEN $__timeGroup(time, '1m', NULL)
WHEN '$granularity' = 'hour' THEN $__timeGroup(time, '1h', NULL)
END AS time,

but this also fails with "ERROR 4856: [42601] Syntax error at or near "as""

Any help would be appreciated.

    6 replies

    tpise
    • tpise
    • Participating Frequently
    • June 20, 2023

    Can you specify the exact version of Grafana (v7) that you were using earlier? And, did you upgrade to v9.0 or any other? There have been a lot of changes in the Grafana versions so I would try to reproduce it as your environment. Let me know. Thanks

    bmurrell
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    • bmurrell
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    • June 20, 2023

    Hi tpise, I'm running grafana versions v7.1.1 and v9.5.3. It wasn't an upgrade. I have 2 boxes.

    bmurrell
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    • bmurrell
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    • June 27, 2023

    @tpise said:
    Can you specify the exact version of Grafana (v7) that you were using earlier? And, did you upgrade to v9.0 or any other? There have been a lot of changes in the Grafana versions so I would try to reproduce it as your environment. Let me know. Thanks

    Did you get anywhere with this?

    tpise
    • tpise
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    • June 27, 2023

    Hi,
    1. If you want to use BETWEEN clause, you can use:
    $__timeFilter(column) - Adds time range filter on the specified column. For example, column BETWEEN '2017-04-21T05:01:17Z' AND '2017-04-21T05:01:17Z'.
    $__timeGroup() macro can also help in your case.

    Whereas $__timeTo() and $__timeFrom() macros would not accept arguments and can only take current timestamps. Attaching the link for supported macros and their definitions for your reference https://github.com/vertica/vertica-grafana-datasource#supported-macros

    1. I am still looking into this.
    tpise
    • tpise
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    • June 27, 2023

    For the CASE clause in your SQL statement, is that a complete statement?
    Also, can you provide the definition for the variable '$granularity' ?

    bmurrell
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    • bmurrell
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    • June 27, 2023

    Hi tpise

    I'm using $__timeFilter(time) in most cases. Just surprised $__timeFrom() and $__timeTo() don't work. They work for SQL Server.
    I was previously making Vertica calls via a SQL Server Linked Server using OPENQUERY, but as the Data Source was SQL Server it was working.
    The SQL Server version of $__timeFrom() and $__timeTo() was also lax on allowing $__timeFrom(time).

    Also, I'm not using $granularity any more.

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