@Test
public void testUpdateTableSchema() throws Exception {
try {
HCatClient client = HCatClient.create(new Configuration(hcatConf));
final String dbName = "testUpdateTableSchema_DBName";
final String tableName = "testUpdateTableSchema_TableName";
client.dropDatabase(dbName, true, HCatClient.DropDBMode.CASCADE);
client.createDatabase(HCatCreateDBDesc.create(dbName).build());
List<HCatFieldSchema> oldSchema = Arrays.asList(new HCatFieldSchema("foo", Type.INT, ""),
new HCatFieldSchema("bar", Type.STRING, ""));
client.createTable(HCatCreateTableDesc.create(dbName, tableName, oldSchema).build());
List<HCatFieldSchema> newSchema = Arrays.asList(new HCatFieldSchema("completely", Type.DOUBLE, ""),
new HCatFieldSchema("new", Type.STRING, ""),
new HCatFieldSchema("fields", Type.STRING, ""));
client.updateTableSchema(dbName, tableName, newSchema);
assertArrayEquals(newSchema.toArray(), client.getTable(dbName, tableName).getCols().toArray());
client.dropDatabase(dbName, false, HCatClient.DropDBMode.CASCADE);
}
catch (Exception exception) {
LOG.error("Unexpected exception.", exception);
assertTrue("Unexpected exception: " + exception.getMessage(), false);
}
}