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ALTER TABLE b_group ALTER COLUMN id RESTART WITH 10;
CREATE OR REPLACE FUNCTION UNIX_TIMESTAMP(date_field timestamp with time zone) RETURNS integer
AS $$
BEGIN
RETURN extract(epoch FROM date_field);
END;
$$ LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION bx_lastval()
RETURNS bigint AS $$
BEGIN
RETURN lastval();
EXCEPTION WHEN OTHERS THEN
RETURN 0;
END;
$$ LANGUAGE plpgsql;
CREATE OR REPLACE FUNCTION bx_get_lock(p_key bigint, p_timeout numeric)
RETURNS integer
LANGUAGE plpgsql AS $$
DECLARE
t0 timestamptz := clock_timestamp();
BEGIN
LOOP
IF pg_try_advisory_lock(p_key) THEN
RETURN 0;
ELSIF (p_timeout >= 0) and (clock_timestamp() > t0 + (p_timeout||' seconds')::interval) THEN
RETURN 1;
ELSE
PERFORM pg_sleep(0.01); /* 10 ms */
END IF;
END LOOP;
END;
$$;
CREATE OR REPLACE FUNCTION bx_release_lock(p_key bigint)
RETURNS integer
LANGUAGE plpgsql AS $$
BEGIN
IF pg_advisory_unlock(p_key) THEN
RETURN 0;
ELSE
RETURN 1;
END IF;
END;
$$;
CREATE OR REPLACE FUNCTION substring_index(
str text,
delim text,
count integer = 1,
out substring_index text
)
RETURNS text AS $$
BEGIN
IF count > 0 THEN
substring_index = array_to_string((string_to_array(str, delim))[:count], delim);
ELSE
DECLARE
_array TEXT[];
BEGIN
_array = string_to_array(str, delim);
substring_index = array_to_string(_array[array_length(_array, 1) + count + 1:], delim);
END;
END IF;
END;
$$
LANGUAGE 'plpgsql'
IMMUTABLE
CALLED ON NULL INPUT;