CREATE OR REPLACE FUNCTION public.clean_aqo_data() RETURNS void AS $$

DECLARE

aqo_data_row aqo_data%ROWTYPE;

aqo_queries_row aqo_queries%ROWTYPE;

aqo_query_texts_row aqo_query_texts%ROWTYPE;

aqo_query_stat_row aqo_query_stat%ROWTYPE;

oid_var oid;

fspace_hash_var bigint;

delete_row boolean DEFAULT false;

FOR aqo_data_row IN (SELECT * FROM aqo_data)

LOOP

delete_row = false;

SELECT aqo_data_row.fspace_hash INTO fspace_hash_var FROM aqo_data;

IF (aqo_data_row.oids IS NOT NULL) THEN

FOREACH oid_var IN ARRAY aqo_data_row.oids

LOOP

IF NOT EXISTS (SELECT relname FROM pg_class WHERE oid = oid_var) THEN

delete_row = true;

END IF;

END LOOP;

END IF;

FOR aqo_queries_row IN (SELECT * FROM public.aqo_queries)

LOOP

IF (delete_row = true AND fspace_hash_var <> 0 AND

fspace_hash_var = aqo_queries_row.fspace_hash AND

aqo_queries_row.fspace_hash = aqo_queries_row.query_hash) THEN

DELETE FROM aqo_data WHERE aqo_data = aqo_data_row;

DELETE FROM aqo_queries WHERE aqo_queries = aqo_queries_row;

FOR aqo_query_texts_row IN (SELECT * FROM aqo_query_texts)

LOOP

DELETE FROM aqo_query_texts

WHERE aqo_query_texts_row.query_hash = fspace_hash_var AND

aqo_query_texts = aqo_query_texts_row;

END LOOP;

FOR aqo_query_stat_row IN (SELECT * FROM aqo_query_stat)

LOOP

DELETE FROM aqo_query_stat

WHERE aqo_query_stat_row.query_hash = fspace_hash_var AND

aqo_query_stat = aqo_query_stat_row;

END LOOP;

END IF;

END LOOP;

END LOOP;

END;

$$ LANGUAGE plpgsql;