Tom Lane wrote:
> "Tao Ma" writes:
>> Is it really important to show the 'bpchar' if there is no any
>> explicit casting for the column default value.
>
> Yeah. We cannot say "char" because per SQL spec, that means
> "char(1)", but there mustn't be a restriction to a single character
> here.
"Tao Ma" writes:
> Is it really important to show the
> 'bpchar' if there is no any explicit casting for the column default value.
Yeah. We cannot say "char" because per SQL spec, that means "char(1)",
but there mustn't be a restriction to a single character here.
regression=# select 'abc'::cha
Thank you for your reply to the question. If it was chosen to reproduce the
actual semantics of the expression in various contexts, I think the bpchar
type of 'abc'::bpchar is surprised me. Is it really important to show the
'bpchar' if there is no any explicit casting for the column default value.
"Tao Ma" writes:
> CREATE TABLE "t" (c1 CHAR(5) DEFAULT 'abc',
> c2 CHAR(5) DEFAULT 'abc'::CHAR(5));
> SELECT pg_get_expr(adbin, adrelid)
> FROM pg_attrdef
> WHERE adrelid = (SELECT oid FROM pg_class WHERE relname = 't');
> pg_get_expr
> -
> 'a
Hi,
Recently, I am reading the postgres codes, and I have a question about the
deparsing some expressions which is contains Const node. The following SQL
will retrieve the definition stored by postgres database for table "t":
CREATE TABLE "t" (c1 CHAR(5) DEFAULT 'abc',
c2 CHAR(5
