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56 lines
1.6 KiB
56 lines
1.6 KiB
-- Return the estimated size of user data. Used for quota checking.
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CREATE OR REPLACE FUNCTION CDB_UserDataSize()
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RETURNS bigint AS
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$$
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-- TODO: double check this query. Maybe use CDB_TableMetadata for lookup ?
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-- also, it's "table_name" sounds sensible to search_path
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--
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-- NOTE: division by 2 is an hack for the_geom_webmercator
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--
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SELECT coalesce(int8(sum(pg_total_relation_size(quote_ident(table_name))) / 2), 0)
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AS quota
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FROM information_schema.tables
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WHERE table_catalog = current_database() AND table_schema = 'public'
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AND table_name != 'spatial_ref_sys'
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AND table_name != 'cdb_tablemetadata'
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AND table_type = 'BASE TABLE';
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$$
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LANGUAGE 'sql' VOLATILE;
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CREATE OR REPLACE FUNCTION CDB_CheckQuota()
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RETURNS trigger AS
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$$
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DECLARE
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pbfact float8;
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qmax int8;
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dice float8;
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quota float8;
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BEGIN
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pbfact := TG_ARGV[0];
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dice := random();
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-- RAISE DEBUG 'CDB_CheckQuota enter: pbfact=% dice=%', pbfact, dice;
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IF dice < pbfact THEN
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RAISE DEBUG 'Checking quota on table % (dice:%, needed:<%)', TG_RELID::text, dice, pbfact;
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BEGIN
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qmax := public._CDB_UserQuotaInBytes();
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EXCEPTION WHEN undefined_function THEN
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RAISE WARNING 'Missing _CDB_UserQuotaInBytes(), assuming no quota';
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RETURN NEW;
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END;
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SELECT CDB_UserDataSize() INTO quota;
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IF quota > qmax THEN
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RAISE EXCEPTION 'Quota exceeded by %KB', (quota-qmax)/1024;
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ELSE RAISE DEBUG 'User quota in bytes: % < % (max allowed)', quota, qmax;
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END IF;
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-- ELSE RAISE DEBUG 'Not checking quota on table % (dice:%, needed:<%)', TG_RELID::text, dice, pbfact;
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END IF;
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RETURN NEW;
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END;
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$$
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LANGUAGE 'plpgsql' VOLATILE;
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