Fix export/import database #15355

Job	Run time
clang format	48s
rustfmt check	13s
sanity checks	11s
python lint check	26s
shell test	13m 54s
clang tidy & clangd diagnostics check	22m 28s
rust build & test	6m 18s
generate binary dataset	2m 9s
clang build & test	8m 44s
code coverage	25m 37s
gcc build & test	5m 40s
apple clang build & test	2m 54s
msvc build & test	15m 51s
webassembly build & test	14m 29s
macos extension test	0s
gcc build & test in-mem only with various vector size	0s
gcc build & test with asan	0s
clang build & test with page_size_log2=${{ matrix.page_size_log2 }}	0s
linux extension test	0s
benchmark	0s
report benchmark result	0s
windows extension test	0s
	1h 59m 42s

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