eb8c8bd4ce
Implements connect_timeout_ms support for HS2-HTTP. This only applies the timeout while establishing the connection, so later requests do not timeout. This is preferrable to configuring http_socket_timeout_s, which can result in timing out operations that just take awhile to execute. Removed ImpalaHttpClient.setTimeout as it's unused and not part of the specification for TTransportBase. Testing: - updates tests now that HS2-HTTP supports connect_timeout_ms - test_impala_shell_timeout for HS2-HTTP without http_socket_timeout_s - marks test_http_socket_timeout to run serially because it relies on short timeouts; inconsistent behavior can leave a dangling session Change-Id: I9012066fb0d16497f309532021d7b323404b9fb2 Reviewed-on: http://gerrit.cloudera.org:8080/23499 Reviewed-by: Michael Smith <michael.smith@cloudera.com> Tested-by: Michael Smith <michael.smith@cloudera.com>
Impala Interactive Shell
You can use the Impala shell tool (impala-shell) to connect to an Impala service. The shell allows you to set up databases and tables, insert data, and issue queries. For ad hoc queries and exploration, you can submit SQL statements in an interactive session. The impala-shell interpreter accepts all the same SQL statements listed in Impala SQL Statements, plus some shell-only commands that you can use for tuning performance and diagnosing problems.
To automate your work, you can specify command-line options to process a single statement or a script file. (Other avenues for Impala automation via python are provided by Impyla or ODBC.)
Installing
$ pip install impala-shell
Online documentation
Quickstart
Non-interactive mode
Processing a single query, e.g., show tables:
$ impala-shell -i impalad-host.domain.com -d some_database -q 'show tables'
Processing a text file with a series of queries:
$ impala-shell -i impalad-host.domain.com -d some_database -f /path/to/queries.sql
Launching the interactive shell
To connect to an impalad host at the default service port (21000):
$ impala-shell -i impalad-host.domain.com
Starting Impala Shell without Kerberos authentication
Connected to impalad-host.domain.com:21000
Server version: impalad version 2.11.0-SNAPSHOT RELEASE (build d4596f9ca3ea32a8008cdc809a7ac9a3dea47962)
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Welcome to the Impala shell.
(Impala Shell v3.0.0-SNAPSHOT (73e90d2) built on Thu Mar 8 00:59:00 PST 2018)
The '-B' command line flag turns off pretty-printing for query results. Use this
flag to remove formatting from results you want to save for later, or to benchmark
Impala.
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[impalad-host.domain.com:21000] >
Launching the interactive shell (secure mode)
To connect to a secure host using kerberos and SSL:
$ impala-shell -k --ssl -i impalad-secure-host.domain.com
Disconnecting
To exit the shell when running interactively, press Ctrl-D at the shell prompt.