Reserved names

YSQL reserves the following names for internal usage. Exception will be raised when these names are used even when they are double-quoted.

Names	Description
oid	System column
tableoid	System column
xmin	System column
cmin	System column
xmax	System column
cmax	System column
ctid	System column
ybctid	Virtual column
Prefixed with pg_	System database objects
Prefixed with yb_	System database objects