getredash/redash

Query with table with CLOB or BLOB fields is not running in Redash.

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#5,546 opened on Jul 26, 2021

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Query Runner: Oracleenhancementhelp wanted

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Description

Issue Summary

Query with table with CLOB or BLOB fields is not running in Redash.

Steps to Reproduce

  1. Query any table with a Clob or Blob column: Select * from Table;
  2. See error: Error running query < cx_Oracle.LOB obect at 0x7f3deb5080> is not json serializable.

Technical details:

  • Redash Version: redash:8.0.2.b37747
  • Browser/OS:
  • How did you install Redash:

Contributor guide

Research direction
Inspect the Redash query runner for Oracle data source, particularly how LOB objects are serialized. Ensure that cx Oracle LOB objects are converted to strings before JSON serialization.
Tech stack
pythonsql
Domain
backenddatabase
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonSQLOracle
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60