PostgreSQL: format timestamp with T delimiter between time and date

What I expect:

SELECT to_char(current_timestamp AT TIME ZONE 'UTC', 'YYYY-MM-DDTHH24-MI-SS')

to produce:

2022-11-11T11-29-51

But it produces:

I’ve tried several options, but neither of them does the trick:

Query for convenience:

SELECT to_char(current_timestamp AT TIME ZONE 'UTC', 'YYYY-MM-DDTHH24-MI-SS') as plain,
       to_char(current_timestamp AT TIME ZONE 'UTC', E'YYYY-MM-DD\'T\'HH24-MI-SS') as with_quotes,
       to_char(current_timestamp AT TIME ZONE 'UTC', 'YYYY-MM-DD\THH24-MI-SS') as with_backslash,
       to_char(current_timestamp AT TIME ZONE 'UTC', 'YYYY-MM-DDT HH24-MI-SS') as with_space

It looks like that T letter gets parsed as part of pattern and then got skipped in a plain sample.
Any idea how to get desired output?

>Solution :

Use double quotes to escape a constant values:

Quote from the manual

Ordinary text is allowed in to_char templates and will be output literally. You can put a substring in double quotes to force it to be interpreted as literal text even if it contains template patterns. For example, in '"Hello Year "YYYY', the YYYY will be replaced by the year data, but the single Y in Year will not be

to_char(current_timestamp AT TIME ZONE 'UTC', 'YYYY-MM-DD"T"HH24-MI-SS')