Domains and Casting
От | Rod Taylor |
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Тема | Domains and Casting |
Дата | |
Msg-id | 01b701c21671$c654ffd0$fe01a8c0@jester обсуждение исходный текст |
Ответы |
Re: Domains and Casting
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Список | pgsql-hackers |
In order to make domains spec compliant I've added the ability for the executor to handle Constraint * types, which it applies appropriately. coerce_type wraps domains with the appropriate Constraint Nodes as required. I've run into a rather simple problem however. CREATE DOMAIN int4notnulldomain int4 NOT NULL; SELECT cast(cast(NULL as int4) as int4notnulldomain); -- constraint applied properly SELECT cast(NULL as int4notnulldomain); -- constraint missed. This appears to be due to makeTypeCast() in gram.y which bypasses creating a TypeCast node for simple A_Const. Removing the top part of the if (always creating a TypeCast node) causes some rather extensive failures in the regression tests, specifically with 'int4'::regproc type constructs. Any advice? -- Rod
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