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| version |
|---|
| PostgreSQL 13.8 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-10), 64-bit |
SELECT 1
| a1 | b1 |
|---|---|
| "a" | "b" |
| "c" | "d" |
| "e" | "f" |
| null | "h" |
SELECT 4