5 Commits (99b8ebec645cdb7ddb0b51a6772ab76c8dd974c6)

Author	SHA1	Message	Date
Bruce Momjian	9098ab9e32	Update copyrights in source tree to 2008.	18 years ago
Tom Lane	31edbadf4a	Downgrade implicit casts to text to be assignment-only, except for the ones ... from the other string-category types; this eliminates a lot of surprising interpretations that the parser could formerly make when there was no directly applicable operator. Create a general mechanism that supports casts to and from the standard string types (text,varchar,bpchar) for *every* datatype, by invoking the datatype's I/O functions. These new casts are assignment-only in the to-string direction, explicit-only in the other, and therefore should create no surprising behavior. Remove a bunch of thereby-obsoleted datatype-specific casting functions. The "general mechanism" is a new expression node type CoerceViaIO that can actually convert between *any* two datatypes if their external text representations are compatible. This is more general than needed for the immediate feature, but might be useful in plpgsql or other places in future. This commit does nothing about the issue that applying the concatenation operator || to non-text types will now fail, often with strange error messages due to misinterpreting the operator as array concatenation. Since it often (not always) worked before, we should either make it succeed or at least give a more user-friendly error; but details are still under debate. Peter Eisentraut and Tom Lane	19 years ago
Bruce Momjian	29dccf5fe0	Update CVS HEAD for 2007 copyright. Back branches are typically not ... back-stamped for this.	19 years ago
Tom Lane	5e08e49637	contrib/isn updates from Jeremy Kronuz.	20 years ago
Tom Lane	dff84dc762	Add contrib/isn module for ISBN/ISSN/EAN13/etc product numbers, and ... remove the old isbn_issn module which is about to be obsoleted by EAN13. contrib/isn is by Germán Méndez Bravo. Our thanks to Garrett A. Wollman for having written the original isbn_issn module.	20 years ago