Re: Standardize the definition of the subtype field of AlterDomainStmt

On 27.05.25 05:06, Quan Zongliang wrote:
> I noticed that the subtype of AlterDomainStmt is directly using
> constants in the code. It is not conducive to the maintenance and
> reading of the code. Based on the definition of AlterTableType, use
> "AD_" as the prefix. Define several macros to replace the original
> characters.
> The subtype of AlterTableCmd is defined using an enumeration. The
> subtypes of AlterDomainStmt are relatively few in number, and the
> original definition uses characters. These definitions still use
> characters and maintain the values unchanged. If some plugins or tools
> are also processing AlterDomainStmt, there will be no errors.

You can still make it an enum and assign the currently in use values to
the new symbols, like

enum AlterDomainType
{
AD_AlterDefault = 'T',
AD_DropNotNull = 'N',
...

I would prefer that.