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From: Zhang Mingli <[email protected]>
To: PostgreSQL Hackers <[email protected]>
Subject: How to declare GIN index on array type column when bootstrap?
Date: Tue, 21 May 2024 17:27:31 +0800
Message-ID: <01e0f73d-3436-47b2-922a-1b88afabf3d2@Spark> (raw)
In-Reply-To: <f2eb71a7-32fb-4745-9a0a-76d550df9681@Spark>
References: <f2eb71a7-32fb-4745-9a0a-76d550df9681@Spark>

 Hi, all

I want to add some columns of int(or Oid) array and declare GIN index for it in catalog when bootstrap.

But current catalogs all use btree, I tried to declare a GIN index but failed, ex:
pg_class.h
```
CATALOG(pg_class
...
Int32 	my_new_column[1] BKI_DEFAULT(_null_);
...
} FormData_pg_class;

DECLARE_INDEX(pg_class_my_index, 7200, on pg_class using gin(my_new_column array_ops));
#define ClassMYIndexId 7200
```
But this failed when init in heap_form_tuple().

I could use SQL to create GIN index column for user tables.

But is it possible to declare array column with GIN index in catalog when bootstrap?

Thanks.


Zhang Mingli
www.hashdata.xyz

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