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Tom Lane 1218ca9956 Add to_regtypemod function to extract typemod from a string type name. ... In combination with to_regtype, this allows converting a string to the "canonicalized" form emitted by format_type. That usage requires parsing the string twice, which is slightly annoying but not really too expensive. We considered alternatives such as returning a record type, but that way was notationally uglier than this, and possibly less flexible. Like to_regtype(), we'd rather that this return NULL for any bad input, but the underlying type-parsing logic isn't yet capable of not throwing syntax errors. Adjust the documentation for both functions to point that out. In passing, fix up a couple of nearby entries in the System Catalog Information Functions table that had not gotten the word about our since-v13 convention for displaying function usage examples. David Wheeler and Erik Wienhold, reviewed by Pavel Stehule, Jim Jones, and others. Discussion: https://postgr.es/m/DF2324CA-2673-4ABE-B382-26B5770B6AA3@justatheory.com		2 years ago
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src	Add to_regtypemod function to extract typemod from a string type name.	2 years ago
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