## Summary
- Port 3 test files and 4 testdata SQL files from PgSQL driver to
GaussDB driver
- Add `gaussdb_z_unit_feature_soft_time_test.go` (15 tests): soft time
create/update/delete, bool/int/datetime soft delete
- Add `gaussdb_z_unit_feature_with_test.go` (6 tests): With/WithAll ORM
relation queries, multiple dependency levels
- Add `gaussdb_z_unit_feature_scanlist_test.go` (9 tests): ScanList for
1:1, 1:N, N:N relation mapping
- Add 4 testdata SQL files for With relation tests
- **30 new test functions**, ~3,941 net new lines
## Test plan
- [x] `go build ./...` passes
- [x] `gofmt` and `gci` applied
- [x] No remaining `pgsql` references in new files
- [ ] Run full test suite against GaussDB instance
ref #4689
---------
Co-authored-by: John Guo <claymore1986@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
## Summary
- Port 2 test files, 1 testdata SQL, and append Test_Raw_Where from
PgSQL driver to GaussDB driver
- Add `gaussdb_z_unit_feature_union_test.go` (4 tests): Union/UnionAll
query operations
- Add `gaussdb_z_unit_feature_model_do_test.go` (10 tests): DO
struct-based CRUD operations
- Append `Test_Raw_Where` to `gaussdb_z_unit_raw_test.go` (1 test): raw
SQL in Where with subquery and column comparison
- Add `testdata/table_with_prefix.sql` for DO prefix tests
- **15 new test functions**, ~605 net new lines
## Test plan
- [x] `go build ./...` passes
- [x] `gofmt` and `gci` applied
- [x] No remaining `pgsql` references in new files
- [ ] Run full test suite against GaussDB instance
ref #4689
---------
Co-authored-by: John Guo <claymore1986@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
