babelfish-for-postgresql / babelfish_extensions / 18946473464

76%

BABEL_5_X_DEV: 77%

push

github

Fixing fluctuating errors and crash during self assignment of parameters. (#4220)

Problem: Previously, during variable self-assignment (e.g., SELECT @var = @var), Babelfish reused the same Datum reference for both source and target without creating a copy. This caused memory corruption, use-after-free errors, and crashes due to unsafe sharing across memory contexts.

Root Cause: The source and target pointed to the same memory location, which could be invalidated by context switches or garbage collection.

Solution: Introduced safe duplication using datumCopy() to ensure each variable has its own memory allocation in the correct context (estate->datum_context). This preserves data integrity and prevents invalid memory access.

Issues Resolved
BABEL-6119, BABEL-5947

Signed-off-by: Tanya Gupta <tanyagp@amazon.com>

3 of 3 new or added lines in 1 file covered. (100.0%)

49740 of 65727 relevant lines covered (75.68%)

322311.27 hits per line