[HACKERS] How does postgres remain the unique index unique?

Hello,everyone, I want to know how postgres remain its unique index unique after i have change it,Forexample: CREATE TABLE human(age INT,name CHAR(30));then in pg_attribute catalog the unique index pg_attribute_relid_attnum_index will use the relid of'human' and attnum of age to create a index tupl

[HACKERS]

hello,everyone! I want to know how postgresql remain its unique index unique after i have change it.For example: create table human(age int,name char(2));then in the pg_attribute catalog the unique index pg_attribute_relid_attnum_index willuse relid of 'human'and attnum of age to create a index tup

[HACKERS] why not ADTs?

Hi,everyone, I am afraid why not make postgreSQL support ADTs such as bag,list and so on.In mymind,all these will make the system more diversiform,aren't they? Thanks! == 263电子邮件－信赖邮自专业

[HACKERS] BUG?

when i see the source codes in the bin directory,i find some very interesting codes:cat <\.    INSERT INTO pg_description SELECT \ t.objoid, c.oid, t.objsubid, t.description \    FROM tmp_pg_description t, pg_class c WHERE c.relname = t.classname;EOF) \ | "$PGPATH"/postgres $PGSQL_OPT template1 >