Re: Possibilities on code change to implement pseudodatatypes - Mailing list pgsql-hackers
From | Vinícius Abrahão |
---|---|
Subject | Re: Possibilities on code change to implement pseudodatatypes |
Date | |
Msg-id | CAM9Bftxj4MsTb=mhOa7hnv0ZSRJg7fidEwUxT8RS-ejAio+iSQ@mail.gmail.com Whole thread Raw |
In response to | Possibilities on code change to implement pseudodatatypes (Vinícius Abrahão <vinnix.bsd@gmail.com>) |
Responses |
Re: Possibilities on code change to implement pseudodatatypes
|
List | pgsql-hackers |
On Mon, Sep 30, 2024 at 9:01 AM Vinícius Abrahão <vinnix.bsd@gmail.com> wrote:
GreetingsI understand the complexity of implementing a pseudo data type whenpassing it over parameters, or using it when creating an object.vide: git grep pseudo | egrep -v -e "po|out|sgml|sql" | moreMy initial problem was saving history (for backup to be used during troubleshoot analysis) of plan changing and so on.. of the pg_statistic table/object.I was surprised - in a good way - to observe so much effort when handling it for that specific purpose. I started to wonder if/when I want to create an object of other pseudatatypes or pass it through a function parameter that the same level of effort during code implementation would be the same.I understand this would be much more a code architecture discretion rather than a punctual question.I have posted in pgsql-admin a question which is "simple problem" when creating a table using anyarray and indeed the problem is simple - the solution might not be.What folks, more experienced in this subject, would recommend as a starting point to achieve that objective?Kind regards,Bazana Schmidt, ViníciusPS.: apologize in advance for the HTML email.
Complementing -
Under this optics below:
[vinnix@vesuvio postgres]$ git grep CheckAttributeType
src/backend/catalog/heap.c: * flags controls which datatypes are allowed, cf CheckAttributeType.
src/backend/catalog/heap.c: CheckAttributeType(NameStr(TupleDescAttr(tupdesc, i)->attname),
src/backend/catalog/heap.c: * CheckAttributeType
src/backend/catalog/heap.c:CheckAttributeType(const char *attname,
src/backend/catalog/heap.c: CheckAttributeType(attname, getBaseType(atttypid), attcollation,
src/backend/catalog/heap.c: CheckAttributeType(NameStr(attr->attname),
src/backend/catalog/heap.c: CheckAttributeType(attname, get_range_subtype(atttypid),
src/backend/catalog/heap.c: CheckAttributeType(attname, att_typelem, attcollation,
src/backend/catalog/index.c: CheckAttributeType(NameStr(to->attname),
src/backend/commands/tablecmds.c: CheckAttributeType(NameStr(attribute->attname), attribute->atttypid, attribute->attcollation,
src/backend/commands/tablecmds.c: CheckAttributeType(colName, targettype, targetcollid,
src/backend/commands/tablecmds.c: CheckAttributeType(partattname,
src/include/catalog/heap.h:/* flag bits for CheckAttributeType/CheckAttributeNamesTypes */
src/include/catalog/heap.h:extern void CheckAttributeType(const char *attname,
src/backend/catalog/heap.c: * flags controls which datatypes are allowed, cf CheckAttributeType.
src/backend/catalog/heap.c: CheckAttributeType(NameStr(TupleDescAttr(tupdesc, i)->attname),
src/backend/catalog/heap.c: * CheckAttributeType
src/backend/catalog/heap.c:CheckAttributeType(const char *attname,
src/backend/catalog/heap.c: CheckAttributeType(attname, getBaseType(atttypid), attcollation,
src/backend/catalog/heap.c: CheckAttributeType(NameStr(attr->attname),
src/backend/catalog/heap.c: CheckAttributeType(attname, get_range_subtype(atttypid),
src/backend/catalog/heap.c: CheckAttributeType(attname, att_typelem, attcollation,
src/backend/catalog/index.c: CheckAttributeType(NameStr(to->attname),
src/backend/commands/tablecmds.c: CheckAttributeType(NameStr(attribute->attname), attribute->atttypid, attribute->attcollation,
src/backend/commands/tablecmds.c: CheckAttributeType(colName, targettype, targetcollid,
src/backend/commands/tablecmds.c: CheckAttributeType(partattname,
src/include/catalog/heap.h:/* flag bits for CheckAttributeType/CheckAttributeNamesTypes */
src/include/catalog/heap.h:extern void CheckAttributeType(const char *attname,
and this line:
if (att_typtype == TYPTYPE_PSEUDO)
{
/*
* We disallow pseudo-type columns, with the exception of ANYARRAY," <<==What WE are missing? WHY? How could we make this state true for creating table commands?
I will try to find time to keep researching about it - if you folks have any insights please let me know.
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