plpgsql

I have a problem on creating PostgreSQL (9.3) trigger on update table. I want set new values in the loop as EXECUTE 'NEW.'|| fieldName || ':=''some prepend data'' || NEW.' || fieldName || ';'; where fieldName is set dynamically. But this string raise error ERROR: syntax error at or near "NEW" How do I go about achieving that? You can implement that rather conveniently with the hstore operator #= : Make sure the additional module is installed properly ( once per database), in a schema that's included in your search_path : How to use % operator from the extension pg_trgm? Best way to install

I have a trigger function for a table test which has the following code snippet: IF TG_OP='UPDATE' THEN IF OLD.locked > 0 AND ( OLD.org_id <> NEW.org_id OR OLD.document_code <> NEW.document_code OR -- other columns ... ) THEN RAISE EXCEPTION 'Message'; -- more code So I am statically checking all the column's new value with its previous value to ensure integrity. Now every time my business logic changes and I have to add new columns into that table, I will have to modify this trigger each time. I thought it would be better if somehow I could dynamically check all the columns of that table,

I want to find the first and the last occurrences of a specific character inside a string. As an example, consider a string named "2010-####-3434", and suppose the character to be searched for is "#". The first occurrence of hash inside the string is at 6-th position, and the last occurrence is at 9-th position. I do not know how to do that, but the regular expression functions like regexp_matches, regexp_replace, regexp_split_to_array may be an alternative route to soling your problem Well... Select position('#' in '2010-####-3434'); will give you the first. If you want the last, just run

I am trying to run this function in PostrgeSQL: CREATE OR REPLACE FUNCTION create_partition_and_insert() RETURNS trigger AS $BODY$ DECLARE partition VARCHAR(25); _date text; BEGIN EXECUTE 'SELECT REPLACE(' || quote_literal(NEW.date) || ',''-'',''_'') into _date'; partition := TG_RELNAME || '_' || _date || ‘p’; IF NOT EXISTS(SELECT relname FROM pg_class WHERE relname=partition) THEN RAISE NOTICE 'A partition has been created %',partition; EXECUTE 'CREATE TABLE ' || partition || ' (check (date = ''' || NEW.date || ''')) INHERITS (' || TG_RELNAME || ');'; END IF; EXECUTE 'INSERT INTO ' ||

I have a PostgreSQL function which calculates date difference: CREATE OR REPLACE FUNCTION testDateDiff () RETURNS int AS $BODY$ DECLARE startDate TIMESTAMP; DECLARE endDate TIMESTAMP; DECLARE diffDatePart int ; BEGIN Select evt_start_date From events Where evt_id = 5 INTO startDate ; Select evt_start_date From events Where evt_id = 6 INTO endDate ; SELECT EXTRACT(day FROM TIMESTAMP startDate - endDate) INTO diffDatePart; RETURN diffDatePart; END; $BODY$ LANGUAGE plpgsql COST 100 If dates are subtracted directly then difference is calculated. But in my case dates are present in variables as

I have a postgres database with several tables that I want to watch for updates on, and if there's any updates, I want to fire a "hey, something changed" update. This works in the basic case, but now it's time to improve things. CREATE FUNCTION notify_update() RETURNS trigger AS $notifyfunction$ BEGIN PERFORM pg_notify('update_watchers', $${"event":"update", "type": "$$ || TG_TABLE_NAME || $$", "payload": {"id": $$ || new.id || $$}}$$); RETURN new; END; $notifyfunction$ LANGUAGE plpgsql; works just fine. I attach it to the table like so: CREATE TRIGGER document_update_body AFTER UPDATE ON