crm26 opened a new pull request, #1466:
URL: https://github.com/apache/datafusion-python/pull/1466
## Which issue does this PR close?
Closes N/A — new feature request.
## Rationale
DataFusion Python users currently have no way to query JSON fields in SQL.
The `datafusion-functions-json` crate (under `datafusion-contrib`) provides
`json_extract`, `json_get`, `->`, `->>` and other JSON operators, but these are
only available in Rust. This PR exposes them to Python users via an optional
feature flag.
## What changes are included in this PR?
- Add `datafusion-functions-json` (v0.53) to workspace dependencies
- Add optional dependency and `json` feature flag to core crate
- Register JSON functions in `SessionContext` creation when feature is
enabled
3 files changed, 11 insertions.
## Are these changes tested?
Not yet — requesting feedback on approach before adding tests. Tests would
verify:
- `json_extract_string(col, '$.path')` works in SQL queries
- Default build (no `json` feature) compiles and runs without regression
- JSON functions are available immediately after `SessionContext()` creation
## Are there any user-facing changes?
When built with `--features json`:
```python
from datafusion import SessionContext
ctx = SessionContext()
# JSON extraction now available in SQL
result = ctx.sql("""
SELECT json_extract_string(data, '$.address.state') as state,
COUNT(*) as cnt
FROM my_table
GROUP BY state
""").collect()
```
Default builds are unaffected.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
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