postrr.sql: Added PostRR_update() functions.

[postrr.git] / src / postrr.sql.in

diff --git a/src/postrr.sql.in b/src/postrr.sql.in
index 546a9dffa1b5003bf723fe6d1bac71012dca4887..71977262a1ddfbf3b8ee6f0c4dd233b18208e2eb 100644 (file)
--- a/src/postrr.sql.in
+++ b/src/postrr.sql.in
@@ -302,6 +302,78 @@ CREATE OR REPLACE FUNCTION CData_update(cdata, cdata)
        AS 'postrr-@POSTRR_MAJOR_VERSION@.@POSTRR_MINOR_VERSION@', 'cdata_update'
        LANGUAGE 'C' IMMUTABLE;
 
+CREATE OR REPLACE FUNCTION PostRR_update(name, name, name, timestamp, double precision)
+       RETURNS cdata
+       LANGUAGE plpgsql
+       AS $$
+DECLARE
+       tbl ALIAS FOR $1;
+       tscol ALIAS FOR $2;
+       vcol ALIAS FOR $3;
+       ts ALIAS FOR $4;
+       value ALIAS FOR $5;
+       ts_str text;
+       v_str text;
+       update_qry text;
+       newts rrtimeslice;
+       new cdata;
+BEGIN
+       tscol  := quote_ident(tscol);
+       vcol   := quote_ident(vcol);
+       ts_str := quote_literal(ts);
+       v_str  := quote_literal(value);
+
+       update_qry = 'CData_update(' || vcol || ', ' || v_str || ')';
+
+       BEGIN
+               EXECUTE 'UPDATE ' || tbl
+                       || ' SET ' || tscol || ' = ' || ts_str
+                       || ', ' || vcol || ' = ' || update_qry
+                       || ' WHERE ' || tscol || ' = ' || ts_str
+                       || ' RETURNING ' || tscol || ', ' || vcol
+                       INTO STRICT newts, new;
+
+               EXCEPTION
+                       WHEN NO_DATA_FOUND THEN
+                               EXECUTE 'INSERT INTO ' || tbl
+                                       || ' (' || tscol || ', ' || vcol
+                                       || ') VALUES (' || ts_str || ', ' || v_str
+                                       || ') RETURNING ' || tscol || ', ' || vcol
+                                       INTO newts, new;
+                               -- use strict again; on exception retry?
+                       WHEN TOO_MANY_ROWS THEN
+                               RAISE EXCEPTION '% is not unique in %.%', ts_str, tbl, tscol;
+       END;
+       RETURN new;
+END;
+$$;
+
+CREATE OR REPLACE FUNCTION PostRR_update(text, timestamp, double precision)
+       RETURNS SETOF cdata
+       LANGUAGE plpgsql
+       AS $$
+DECLARE
+       rraname ALIAS FOR $1;
+       ts ALIAS FOR $2;
+       value ALIAS FOR $3;
+       adef RECORD;
+       new cdata;
+BEGIN
+       FOR adef IN SELECT tbl, tscol, vcol FROM postrr.rrarchives
+                       WHERE postrr.rrarchives.rraname = $1 LOOP
+               EXECUTE 'SELECT PostRR_update('
+                       || quote_literal(adef.tbl) || ', '
+                       || quote_literal(adef.tscol) || ', '
+                       || quote_literal(adef.vcol) || ', '
+                       || quote_literal(ts) || ', '
+                       || quote_literal(value) || ')'
+                       INTO new;
+               RETURN NEXT new;
+       END LOOP;
+       RETURN;
+END;
+$$;
+
 COMMIT;
 
 SET client_min_messages TO DEFAULT;