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  1. Hive
  2. HIVE-12299

Hive Column Data Type definition in schema limited to 4000 characters - too small

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.3.0, 3.0.0
    • Component/s: Hive
    • Labels:
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      Description

      The data type definitions in the table schema are limited to 4K characters - as per the code here: https://github.com/apache/hive/tree/master/metastore/scripts/upgrade/derby

      I checked quickly and all meta stores have similar schema definition for the column type.

      Is there any reason why this limit is low? We had a table that had defined a struct, which had over 200 columns and the column names were rather verbose (for readability). This caused a non-obvious failure like
      FAILED: IllegalArgumentException Error: : expected at the end of 'string:array<struct<xyz:string, .....'. Is it possible to make this configurable or at least increase it to something much higher?

      Additionally, there is no validation error that communicates this limitation to the user, it required non-trivial debugging and looking into the table definitions when it failed trying to parse what was essentially a truncated type.

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              • Assignee:
                ngangam Naveen Gangam
                Reporter:
                lakshminaarayanan.r@gmail.com Lakshmi Ramakrishnan
              • Votes:
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                9 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: