{"record":{"id":"31219a6114b3319b","repo":"apache/beam","slug":"error-while-determining-columns-from-table-gettable","errorCode":null,"errorMessage":"Error while determining columns from table: ${getTable()}","messagePattern":"Error while determining columns from table: (.+?)","errorType":"exception","errorClass":"RuntimeException","httpStatus":null,"severity":"error","filePath":"sdks/java/io/jdbc/src/main/java/org/apache/beam/sdk/io/jdbc/JdbcIO.java","lineNumber":2526,"sourceCode":"          JdbcUtil.generateStatement(\n              checkStateNotNull(getTable()),\n              fields.stream().map(FieldWithIndex::getField).collect(Collectors.toList())));\n    }\n\n    // Spotbugs seems to not understand the multi-statement try-with-resources\n    @SuppressFBWarnings(\"OBL_UNSATISFIED_OBLIGATION\")\n    private List<SchemaUtil.FieldWithIndex> getFilteredFields(Schema schema) {\n      Schema tableSchema;\n\n      try (Connection connection =\n              checkStateNotNull(getDataSourceProviderFn()).apply(null).getConnection();\n          PreparedStatement statement =\n              connection.prepareStatement(String.format(\"SELECT * FROM %s\", getTable()))) {\n        ResultSetMetaData metadata =\n            checkStateNotNull(statement.getMetaData(), \"could not get statement metadata\");\n        tableSchema = SchemaUtil.toBeamSchema(metadata);\n      } catch (SQLException e) {\n        throw new RuntimeException(\"Error while determining columns from table: \" + getTable(), e);\n      }\n\n      checkState(\n          tableSchema.getFieldCount() >= schema.getFieldCount(),\n          String.format(\n              \"Input schema has more fields (%s) than actual table (%s).%n\\t\"\n                  + \"Input schema fields: %s | Table fields: %s\",\n              tableSchema.getFieldCount(),\n              schema.getFieldCount(),\n              schema.getFields().stream()\n                  .map(Schema.Field::getName)\n                  .collect(Collectors.joining(\", \")),\n              tableSchema.getFields().stream()\n                  .map(Schema.Field::getName)\n                  .collect(Collectors.joining(\", \"))));\n\n      // filter out missing fields from output table\n      List<Schema.Field> missingFields =","sourceCodeStart":2508,"sourceCodeEnd":2544,"githubUrl":"https://github.com/apache/beam/blob/12126d8942aaf848030c478b4c6a28c6af861c66/sdks/java/io/jdbc/src/main/java/org/apache/beam/sdk/io/jdbc/JdbcIO.java#L2508-L2544","documentation":"JdbcIO.withSchema() reads the table's metadata at pipeline setup time to derive a Beam Schema. It executes `SELECT * FROM <table>` via connection.prepareStatement() and converts the ResultSetMetaData to a Beam Schema with SchemaUtil.toBeamSchema(). If any SQLException occurs during that round trip (prepare or metadata fetch), it is wrapped in this RuntimeException.","triggerScenarios":"Calling JdbcIO.<Row>readWithPartitions/withSchema where the configured table name is wrong or unqualified, the table does not exist, the configured user lacks SELECT privileges on the table, or the connection is misconfigured/unreachable while JdbcIO runs `SELECT * FROM <table>` to infer the schema.","commonSituations":"Typo in table name or missing schema/database qualifier (e.g. need `mydb.public.users`), running in a VPC/network where the DB is not reachable from the worker, credentials without metadata permissions, or driver not on classpath so connection setup fails.","solutions":["Verify the table name is correct and fully qualified (database/schema.table) for the target connection.","Confirm the connection config (URL, user, password, driver jars) by connecting manually with the same credentials.","Grant the configured DB user SELECT and metadata-reading privileges on the table.","Catch the RuntimeException and inspect the wrapped SQLException cause for the underlying reason (connection refused vs. table not found vs. permission denied)."],"exampleFix":"// before\nJdbcIO.<Row>readWithPartitions().withTable(\"users\") // table lives in another schema\n// after\nJdbcIO.<Row>readWithPartitions().withTable(\"mydb.public.users\")","handlingStrategy":"try-catch","validationCode":"// before building the pipeline\nif (table == null || !table.contains(\".\")) {\n  throw new IllegalArgumentException(\"Use a fully qualified table name: db.schema.table\");\n}\ntry (Connection c = DriverManager.getConnection(url, user, pass);\n     PreparedStatement ps = c.prepareStatement(\"SELECT * FROM \" + table)) {\n  ps.getMetaData(); // probes existence + permissions\n}","typeGuard":null,"tryCatchPattern":"try {\n  pipeline.apply(JdbcIO.<Row>readWithPartitions()...);\n} catch (RuntimeException e) {\n  if (e.getMessage() != null && e.getMessage().startsWith(\"Error while determining columns from table\")) {\n    Throwable cause = e.getCause(); // inspect SQLException for table-not-found vs access denied\n  }\n  throw e;\n}","preventionTips":["Always qualify table names with database/schema.","Smoke-test connectivity and SELECT permissions from the same network as the runner before launching jobs.","Package the correct JDBC driver jar via withDriverJars() or classpath."],"tags":["jdbc","java","schema-inference","database"],"backgroundTag":"database-query-failed","analyzedSha":"12126d8942aaf848030c478b4c6a28c6af861c66","analyzedAt":"2026-09-13T01:50:10.254Z","contentChangedAt":"2026-09-13T01:50:10.254Z","schemaVersion":2},"datasetVersion":"2026-09-14T16:17:12.679Z"}