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pg
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select_unionall_scalar.sql

select_unionall_scalar.sql 171 B
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  1. --!syntax_pg
    2. 

  2. select * from (select 1 as x, 3 as y) u
    3. 

  3. union all
    4. 

  4. select * from (select null::int4 as y, 2 as x) v
    5. 

  5. union all
    6. 

  6. select * from (select 4 as y, null::int4 as x) v
    7.