Statements:
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- Vacuum analyze;
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- Vacuum full;
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- Create unique index concurrently on users ....
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- Create index on users .....
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- Insert into users....
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- Alter table users add constraint 'new_check_name' CHECK (....) not valid;
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- update users set column = $1;
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- update users set column_name = $2 where pk = $2;