a11450db86
Thrift 0.11.0 has known issues where Unicode errors are not handler properly, including one case where the client can hang. The traditional form factor for impala-shell uses a patched Thrift that fixes those issues, but the PyPi package uses the unpatched Thrift 0.11.0. This modifies the requirements.txt file to use Thrift 0.14.2, which has fixes for these Unicode issues. Thrift 0.14.2 has a slightly different error message, so this amends the allowed error messages in test_utf8_decoding_error_handling(). This is a bit awkward, given that the Python code generation continues to happen with Thrift 0.11.0. Comparing the Python code for Thrift 0.11 vs Thrift 0.14, I didn't see noticeable differences. Given that the client can hang, this seems worth fixing ahead of the full conversion to Thrift 0.14 for all of Impala. Testing: - Ran the Unicode error handling tests with a PyPi impala-shell - Ran the shell tests normally Change-Id: I63e0a5dda98df20c9184a347397118b1f3529603 Reviewed-on: http://gerrit.cloudera.org:8080/18560 Reviewed-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@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.