refactor: make_map_batch array handling

[nathanb9]

Which issue does this PR close?

• Closes Refactor make_map_batch to avoid wrapping expanded arrays back in ColumnarValue #22833.

Rationale for this change

Simplify make_map_batch array handling after scalar expansion.

What changes are included in this PR?

Pass extracted ArrayRefs through validation and map construction.

Are these changes tested?

Ran cargo fmt --all, cargo test -p datafusion-functions-nested map, and cargo clippy --all-targets --all-features -- -D warnings.

Are there any user-facing changes?

No.

[comphead]

run benchmark map

[adriangbot]

🤖 Benchmark running (GKE) | trigger
Instance: c4a-highmem-16 (12 vCPU / 65 GiB) | Linux bench-c4834442569-735-fkp4h 6.12.85+ #1 SMP Mon May 11 08:17:35 UTC 2026 aarch64 GNU/Linux

CPU Details (lscpu)

Architecture:                            aarch64
CPU op-mode(s):                          64-bit
Byte Order:                              Little Endian
CPU(s):                                  16
On-line CPU(s) list:                     0-15
Vendor ID:                               ARM
Model name:                              Neoverse-V2
Model:                                   1
Thread(s) per core:                      1
Core(s) per cluster:                     16
Socket(s):                               -
Cluster(s):                              1
Stepping:                                r0p1
BogoMIPS:                                2000.00
Flags:                                   fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svepmull svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16 dgh rng bti
L1d cache:                               1 MiB (16 instances)
L1i cache:                               1 MiB (16 instances)
L2 cache:                                32 MiB (16 instances)
L3 cache:                                80 MiB (1 instance)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-15
Vulnerability Gather data sampling:      Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Not affected
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; CSV2, BHB
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Not affected

Comparing issue-22833-make-map-refactor (41dfb46) to ea2ffdb (merge-base) diff using: map
Results will be posted here when complete

---

File an issue against this benchmark runner

[adriangbot]

🤖 Benchmark completed (GKE) | trigger

Instance: c4a-highmem-16 (12 vCPU / 65 GiB)

CPU Details (lscpu)

Architecture:                            aarch64
CPU op-mode(s):                          64-bit
Byte Order:                              Little Endian
CPU(s):                                  16
On-line CPU(s) list:                     0-15
Vendor ID:                               ARM
Model name:                              Neoverse-V2
Model:                                   1
Thread(s) per core:                      1
Core(s) per cluster:                     16
Socket(s):                               -
Cluster(s):                              1
Stepping:                                r0p1
BogoMIPS:                                2000.00
Flags:                                   fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm jscvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm dit uscat ilrcpc flagm sb paca pacg dcpodp sve2 sveaes svepmull svebitperm svesha3 svesm4 flagm2 frint svei8mm svebf16 i8mm bf16 dgh rng bti
L1d cache:                               1 MiB (16 instances)
L1i cache:                               1 MiB (16 instances)
L2 cache:                                32 MiB (16 instances)
L3 cache:                                80 MiB (1 instance)
NUMA node(s):                            1
NUMA node0 CPU(s):                       0-15
Vulnerability Gather data sampling:      Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit:             Not affected
Vulnerability L1tf:                      Not affected
Vulnerability Mds:                       Not affected
Vulnerability Meltdown:                  Not affected
Vulnerability Mmio stale data:           Not affected
Vulnerability Reg file data sampling:    Not affected
Vulnerability Retbleed:                  Not affected
Vulnerability Spec rstack overflow:      Not affected
Vulnerability Spec store bypass:         Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1:                Mitigation; __user pointer sanitization
Vulnerability Spectre v2:                Mitigation; CSV2, BHB
Vulnerability Srbds:                     Not affected
Vulnerability Tsa:                       Not affected
Vulnerability Tsx async abort:           Not affected
Vulnerability Vmscape:                   Not affected

Details

group                   HEAD                                   issue-22833-make-map-refactor
-----                   ----                                   -----------------------------
make_map_1000           1.01     72.0±1.40µs        ? ?/sec    1.00     71.6±1.36µs        ? ?/sec
map_1000_binary         1.00      8.9±0.02ms        ? ?/sec    1.04      9.2±0.02ms        ? ?/sec
map_1000_binary_view    1.00      8.6±0.03ms        ? ?/sec    1.05      9.1±0.05ms        ? ?/sec
map_1000_int32          1.00      4.7±0.01ms        ? ?/sec    1.02      4.8±0.02ms        ? ?/sec
map_1000_utf8           1.00      9.1±0.04ms        ? ?/sec    1.04      9.5±0.02ms        ? ?/sec
map_1000_utf8_view      1.00      8.9±0.03ms        ? ?/sec    1.05      9.4±0.03ms        ? ?/sec

Resource Usage

map — base (merge-base)

Metric	Value
Wall time	350.1s
Peak memory	131.9 MiB
Avg memory	19.0 MiB
CPU user	73.4s
CPU sys	0.1s
Peak spill	0 B

map — branch

Metric	Value
Wall time	330.1s
Peak memory	130.0 MiB
Avg memory	20.8 MiB
CPU user	73.5s
CPU sys	0.1s
Peak spill	0 B

---

File an issue against this benchmark runner

[comphead]

Thanks @nathanb9 this makes sense!