cravani commented on a change in pull request #1328: URL: https://github.com/apache/hive/pull/1328#discussion_r461806183
########## File path: jdbc-handler/src/main/java/org/apache/hive/storage/jdbc/dao/JdbcRecordIterator.java ########## @@ -59,9 +63,26 @@ public JdbcRecordIterator(Connection conn, PreparedStatement ps, ResultSet rs, C fieldNamesProperty = Preconditions.checkNotNull(conf.get(Constants.JDBC_QUERY_FIELD_NAMES)); fieldTypesProperty = Preconditions.checkNotNull(conf.get(Constants.JDBC_QUERY_FIELD_TYPES)); } else { - fieldNamesProperty = Preconditions.checkNotNull(conf.get(serdeConstants.LIST_COLUMNS)); - fieldTypesProperty = Preconditions.checkNotNull(conf.get(serdeConstants.LIST_COLUMN_TYPES)); + try { Review comment: fixed :) ########## File path: jdbc-handler/src/main/java/org/apache/hive/storage/jdbc/dao/JdbcRecordIterator.java ########## @@ -59,9 +63,26 @@ public JdbcRecordIterator(Connection conn, PreparedStatement ps, ResultSet rs, C fieldNamesProperty = Preconditions.checkNotNull(conf.get(Constants.JDBC_QUERY_FIELD_NAMES)); fieldTypesProperty = Preconditions.checkNotNull(conf.get(Constants.JDBC_QUERY_FIELD_TYPES)); } else { - fieldNamesProperty = Preconditions.checkNotNull(conf.get(serdeConstants.LIST_COLUMNS)); - fieldTypesProperty = Preconditions.checkNotNull(conf.get(serdeConstants.LIST_COLUMN_TYPES)); + try { + if(conf.get(Constants.JDBC_QUERY) == null) { + ResultSetMetaData metadata = rs.getMetaData(); + int numColumns = metadata.getColumnCount(); + List<String> columnNames = new ArrayList<String>(numColumns); + for (int i = 0; i < numColumns; i++) { + columnNames.add(metadata.getColumnName(i + 1)); + } + fieldNamesProperty = String.join(",",columnNames); + } + else Review comment: { & }. are required? I was assuming since we have single statement within conditional block, it should be fine. ########## File path: jdbc-handler/src/main/java/org/apache/hive/storage/jdbc/dao/JdbcRecordIterator.java ########## @@ -59,9 +63,26 @@ public JdbcRecordIterator(Connection conn, PreparedStatement ps, ResultSet rs, C fieldNamesProperty = Preconditions.checkNotNull(conf.get(Constants.JDBC_QUERY_FIELD_NAMES)); fieldTypesProperty = Preconditions.checkNotNull(conf.get(Constants.JDBC_QUERY_FIELD_TYPES)); } else { - fieldNamesProperty = Preconditions.checkNotNull(conf.get(serdeConstants.LIST_COLUMNS)); - fieldTypesProperty = Preconditions.checkNotNull(conf.get(serdeConstants.LIST_COLUMN_TYPES)); + try { + if(conf.get(Constants.JDBC_QUERY) == null) { Review comment: Fixed. ########## File path: jdbc-handler/src/main/java/org/apache/hive/storage/jdbc/dao/JdbcRecordIterator.java ########## @@ -59,9 +63,26 @@ public JdbcRecordIterator(Connection conn, PreparedStatement ps, ResultSet rs, C fieldNamesProperty = Preconditions.checkNotNull(conf.get(Constants.JDBC_QUERY_FIELD_NAMES)); fieldTypesProperty = Preconditions.checkNotNull(conf.get(Constants.JDBC_QUERY_FIELD_TYPES)); } else { - fieldNamesProperty = Preconditions.checkNotNull(conf.get(serdeConstants.LIST_COLUMNS)); - fieldTypesProperty = Preconditions.checkNotNull(conf.get(serdeConstants.LIST_COLUMN_TYPES)); + try { + if(conf.get(Constants.JDBC_QUERY) == null) { + ResultSetMetaData metadata = rs.getMetaData(); + int numColumns = metadata.getColumnCount(); + List<String> columnNames = new ArrayList<String>(numColumns); + for (int i = 0; i < numColumns; i++) { + columnNames.add(metadata.getColumnName(i + 1)); + } + fieldNamesProperty = String.join(",",columnNames); + } + else + fieldNamesProperty = Preconditions.checkNotNull(conf.get(serdeConstants.LIST_COLUMNS)); + } + catch (Exception e) { + LOGGER.error("Error while trying to get column names.", e); + throw new HiveJdbcDatabaseAccessException("Error while trying to get column names: " + e.getMessage(), e); + } + fieldTypesProperty = Preconditions.checkNotNull(conf.get(serdeConstants.LIST_COLUMN_TYPES)); } + LOGGER.debug("Iterator ColumnNames = "+fieldNamesProperty); Review comment: fixed. ########## File path: jdbc-handler/src/main/java/org/apache/hive/storage/jdbc/dao/JdbcRecordIterator.java ########## @@ -59,9 +63,26 @@ public JdbcRecordIterator(Connection conn, PreparedStatement ps, ResultSet rs, C fieldNamesProperty = Preconditions.checkNotNull(conf.get(Constants.JDBC_QUERY_FIELD_NAMES)); fieldTypesProperty = Preconditions.checkNotNull(conf.get(Constants.JDBC_QUERY_FIELD_TYPES)); } else { - fieldNamesProperty = Preconditions.checkNotNull(conf.get(serdeConstants.LIST_COLUMNS)); - fieldTypesProperty = Preconditions.checkNotNull(conf.get(serdeConstants.LIST_COLUMN_TYPES)); + try { + if(conf.get(Constants.JDBC_QUERY) == null) { + ResultSetMetaData metadata = rs.getMetaData(); + int numColumns = metadata.getColumnCount(); + List<String> columnNames = new ArrayList<String>(numColumns); + for (int i = 0; i < numColumns; i++) { + columnNames.add(metadata.getColumnName(i + 1)); + } + fieldNamesProperty = String.join(",",columnNames); + } + else Review comment: Ah, Updated the code with { & } :) ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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