Reviewed PR #65208.

I found no blocking issues and no inline comments to submit.

Critical checkpoint conclusions:

• Goal and tests: the PR batches the generated INSERT ... VALUES setup rows in the three changed export_p0 suites while preserving the same row sets. Existing ordered qt_select_default checks and OUTFILE comparisons still validate the exported results, and no .out update is needed because expected query output is unchanged.
• Scope: the change is small and limited to regression-test setup code in test_outfile_native.groovy, test_outfile.groovy, and test_outfile_expr.groovy.
• Concurrency/lifecycle/config/compatibility/persistence: no product runtime code, persisted format, FE/BE protocol, or configuration item is changed. The added batching executes sequentially in the same suite setup path.
• Parallel or related paths: checked the changed local/native export suites and analogous outfile test patterns; I did not find a distinct parallel-path issue introduced by this PR.
• Test results and style: git diff --check is clean for the base/head diff. I did not run the regression suite because this checkout lacks thirdparty/installed, thirdparty/installed/bin/protoc, and a Doris regression cluster.
• Performance: replacing one large literal VALUES statement with 500-row batches addresses the stated Cloud P0 planning timeout risk without changing the tested output semantics.

Subagent conclusions:

• optimizer-rewrite: no optimizer/rewrite correctness, semantic equivalence, or parallel join/aggregate issue found; final convergence returned NO_NEW_VALUABLE_FINDINGS.
• tests-session-config: no regression expected-output, session/config propagation, compatibility, or CI/style issue found; final convergence returned NO_NEW_VALUABLE_FINDINGS.

User focus points: no additional user-provided review focus was present.

LGTM