PrestoDBMetadataProcessor load metadata failed due to Duplicate Table --------------------------------------------------------------------- Key: TEIID-4706 URL: https://issues.jboss.org/browse/TEIID-4706 Project: Teiid Issue Type: Bug Components: Misc. Connectors Affects Versions: 9.2 Environment: Scenario one * Presto 0.163 with one mysql catalog added * Teiid 9.2.0.Beta2-SNAPSHOT in embedded mode Scenario two * Presto 0.162 with one mysql catalog added(QE test environment) * Teiid 9.2.0.Beta2-SNAPSHOT server Reporter: Kylin Soong Assignee: Kylin Soong Attachments: TEIID4682Presto.java, teiid4682-server-vdb.xml, teiid4682-vdb.xml PrestoDBMetadataProcessor use 'SHOW CATALOGS', 'SHOW TABLES FROM ...' to load tables from presto, presto default has a system catalog, in my test I only add one mysql catalog {code} SQL: SHOW CATALOGS +---------+ | Catalog | +---------+ | mysql | | system | +---------+ {code} Note that both mysql and system has schema: *information_schema*： {code} SQL: SHOW SCHEMAS FROM mysql +--------------------+ | Schema | +--------------------+ | information_schema | | teiid | +--------------------+ SQL: SHOW SCHEMAS FROM system +--------------------+ | Schema | +--------------------+ | information_schema | | jdbc | | metadata | | runtime | +--------------------+ {code} Schema in different catalog contain the same tables {code} SQL: SHOW TABLES FROM mysql.information_schema +-------------------------+ | Table | +-------------------------+ | __internal_partitions__ | | columns | | schemata | | tables | | views | +-------------------------+ SQL: SHOW TABLES FROM system.information_schema +-------------------------+ | Table | +-------------------------+ | __internal_partitions__ | | columns | | schemata | | tables | | views | +-------------------------+ {code} Due the table name in both system.information_schema and mysql.information_schema has same table name, the *TEIID60013 Duplicate Table* through {code} Exception in thread "main" org.teiid.metadata.DuplicateRecordException: TEIID60013 Duplicate Table __internal_partitions__ at org.teiid.metadata.Schema.addTable(Schema.java:49) at org.teiid.metadata.MetadataFactory.addTable(MetadataFactory.java:231) at org.teiid.translator.jdbc.JDBCMetdataProcessor.addTable(JDBCMetdataProcessor.java:368) at org.teiid.translator.prestodb.PrestoDBMetadataProcessor.addTable(PrestoDBMetadataProcessor.java:147) at org.teiid.translator.prestodb.PrestoDBMetadataProcessor.getConnectorMetadata(PrestoDBMetadataProcessor.java:74) at org.teiid.translator.jdbc.JDBCExecutionFactory.getMetadata(JDBCExecutionFactory.java:306) at org.teiid.translator.jdbc.JDBCExecutionFactory.getMetadata(JDBCExecutionFactory.java:69) at org.teiid.query.metadata.NativeMetadataRepository.getMetadata(NativeMetadataRepository.java:96) at org.teiid.query.metadata.NativeMetadataRepository.loadMetadata(NativeMetadataRepository.java:62) at org.teiid.query.metadata.ChainingMetadataRepository.loadMetadata(ChainingMetadataRepository.java:55) at org.teiid.runtime.EmbeddedServer.loadMetadata(EmbeddedServer.java:816) at org.teiid.runtime.AbstractVDBDeployer.loadMetadata(AbstractVDBDeployer.java:210) at org.teiid.runtime.EmbeddedServer.deployVDB(EmbeddedServer.java:766) at org.teiid.runtime.EmbeddedServer.deployVDB(EmbeddedServer.java:707) at org.teiid.test.teiid4699.TEIID4682Presto.main(TEIID4682Presto.java:41) {code}