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Merge pull request #362 from CartoDB/fdw-affected-tables

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Make CDB_Get_Foreign_Updated_At robust to missing CDB_TableMetadata
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Rafa de la Torre
2019-07-04 16:02:46 +02:00
committed by GitHub
parent 75ba13b834 d378ca6fe0
commit 29a31d4c40
2 changed files with 13 additions and 1 deletions
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9
scripts-available/CDB_ForeignTable.sql
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@@ -125,7 +125,14 @@ BEGIN
-- We assume that the remote cdb_tablemetadata is called cdb_tablemetadata and is on the same schema as the queried table.
SELECT nspname FROM pg_class c, pg_namespace n WHERE c.oid=foreign_table AND c.relnamespace = n.oid INTO fdw_schema_name;
EXECUTE FORMAT('SELECT updated_at FROM %I.cdb_tablemetadata WHERE tabname=%L ORDER BY updated_at DESC LIMIT 1', fdw_schema_name, remote_table_name) INTO time;
BEGIN
EXECUTE FORMAT('SELECT updated_at FROM %I.cdb_tablemetadata WHERE tabname=%L ORDER BY updated_at DESC LIMIT 1', fdw_schema_name, remote_table_name) INTO time;
EXCEPTION
WHEN undefined_table THEN
-- If you add a GET STACKED DIAGNOSTICS text_var = RETURNED_SQLSTATE
-- you get a code 42P01 which corresponds to undefined_table
RAISE NOTICE 'CDB_Get_Foreign_Updated_At: could not find %.cdb_tablemetadata while checking % updated_at, returning NULL timestamp', fdw_schema_name, foreign_table;
END;
RETURN time;
END
$$