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17 lines
1.0 KiB
17 lines
1.0 KiB
select 'DO $$ BEGIN BEGIN ALTER TABLE '||relname||' ADD COLUMN recordyear int4; EXCEPTION WHEN duplicate_column THEN RAISE NOTICE ''column recordyear already exists''; END; END;$$;' as tabname from pg_class c
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where relkind = 'r' and relname like 'j%_r' and relname not like 'pg_%' and relname not like 'sql_%' order by relname;
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select 'update ' || relname || ' set recordyear=2019;' as sqlstr from pg_class c
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where relkind = 'r' and relname like 'j%_r' and relname not like 'pg_%' and relname not like 'sql_%' order by relname;
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-- 设置默认值
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select 'DO $$ BEGIN BEGIN ALTER TABLE '||relname||' ALTER COLUMN recordyear SET DEFAULT 2020; EXCEPTION WHEN duplicate_column THEN RAISE NOTICE ''column recordyear already exists''; END; END;$$;' as tabname from pg_class c
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where relkind = 'r' and relname like 'j%_r' and relname not like 'pg_%' and relname not like 'sql_%' order by relname;
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-- 删除默认值
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ALTER TABLE table_name ALTER COLUMN column_name DROP DEFAULT; |