adarshvijayaraghavan opened a new issue, #50806:
URL: https://github.com/apache/arrow/issues/50806
### Describe the enhancement requested
`SQLForeignKeys` is currently an unimplemented placeholder in the Arrow
Flight SQL ODBC driver. In `cpp/src/arrow/flight/sql/odbc/entry_points.cc`, the
entry point logs its arguments and then throws:
```
arrow::flight::sql::odbc::DriverException("SQLForeignKeysW is not
implemented", "IM001")
```
The placeholder was added in #47725 with the intent that follow-up PRs
would implement each API. This issue tracks implementing `SQLForeignKeys`.
The underlying capability already exists on the Flight SQL C++ client
(`cpp/src/arrow/flight/sql/client.h`). Per the ODBC spec, `SQLForeignKeys` maps
to different RPCs depending on which table arguments are provided:
`GetExportedKeys()` (PK table only), `GetImportedKeys()` (FK table only), and
`GetCrossReference()` (both).
Ref (SQLForeignKeys spec):
https://learn.microsoft.com/en-us/sql/odbc/reference/syntax/sqlforeignkeys-function
Parent issue: https://github.com/apache/arrow/issues/30622
### Component(s)
C++
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