Convert column from Date type to Timestamp

Question

I have a table with column named modify which is of type Date . I have converted it to type TIMESTAMP WITHOUT TIME ZONE .

This column data is updated by trigger :

CREATE OR REPLACE FUNCTION trigA()
  RETURNS trigger AS
$BODY$
begin
    new.modify=current_date;
    return new;
end;
$BODY$
  LANGUAGE plpgsql VOLATILE

which simply keep track of when someone updated the row.

the current_date was ok for Date but it lack time so I wanted to change it to: current_timestamp . However according to the manual : current_timestamp gives timestamp with time zone .

I pass on the whole page and couldn't find what gives the current date and time for timestamp without time zone type.

My question: How to insert the current date and time to a timestamp without time zone field.

Answer 1

You should use LOCALTIMESTAMP

CREATE OR REPLACE FUNCTION trigA()
  RETURNS trigger AS
$BODY$
begin
    new.modify=LOCALTIMESTAMP;
    return new;
end;
$BODY$
  LANGUAGE plpgsql VOLATILE

The PostgreSQL manual mention:

CURRENT_TIME and CURRENT_TIMESTAMP deliver values with time zone; LOCALTIME and LOCALTIMESTAMP deliver values without time zone.