Database Reference
In-Depth Information
Command
option
Description
| |
| STREAM DATA SINK |
| EXCHANGE ID: 1 |
| UNPARTITIONED |
| |
| 0:SCAN HDFS |
| table=default.studentlist |
#partitions=0 size=0B |
| tuple ids: 0 |
+--------------------------------+
Returned 16 row(s) in 2.36s
Table- and database-specific commands
Now let's take a look at table- and database-specific commands (shown in the follow-
ing table), which you can use inside the Impala shell to play with your databases and
tables. I have explained these commands in great detail in the following chapters, so
these commands are listed here only for reference.
Command
option
Description
alter
Use this command to change the table structure or table settings.
describe
Use this command to see information about columns, column data
types, and column comments for a specific table.
