JDBC driver on Mariadb, creates empty tables when having Unicode characters in content

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
38/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
java, mariadb, sql
Domain
databases

Research direction

No source file or test is named. Start by reproducing the reported JDBC-writer failure with a tab or other Unicode character in a VARCHAR value on MariaDB, then inspect the relevant writer path. Done means the table is created and populated without an unexpected column reference or SQLException.

Written by the indexing model from the issue text.

Description

bug

Describe the bug
using JDBC driver on Mariadb, creates empty tables and references a column 'u' that is not in the query.
it just creates an empty table in mariadb and gives a java.sql.SQLException (cfr screenshot below)

It looks like Drill's JDBC writer needs to gain support for Unicode escape sequences in its input data.

To Reproduce
Steps to reproduce the behavior:

  • inject a 'tab' character (or any other unicode character) are present in the content
    cfr query in screenshot

Expected behavior
when there are unicode characters in varchar columns written to a table via a JDBC connection, it should create the table and populate that table by supporting unicode data loading into the sql database table

Error detail, log output or screenshots
image

Drill version
using drill : apache-drill-1.21.1

Additional context
https://apache-drill.slack.com/archives/CG380K519/p1719081685217149

Dominant language
Java
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Forks
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Avg merge
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Merged PRs (30d)
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