64b324ac40
Build Python 3 eggs for the shell tarball so it works with both Python 2 and Python 3. The impala-shell script selects eggs based on the available Python version. Inlines thrift for impala-shell so we can easily build Python 2 and Python 3 versions, consistent with other libraries. The impala-shell version should always be at least as new as IMPALA_THRIFT_PY_VERSION. Thrift 0.13.0+ wraps all exceptions during TSocket read/write operations in TTransportException. Specifically socket.error that we got as raw exceptions are now wrapped. Unwraps them before raising to preserve prior behavior. A specific Python version can be selected with IMPALA_PYTHON_EXECUTABLE; otherwise it will use 'python', and if unavailable try 'python3'. Adds tests for impala-shell tarball with Python 3. Change-Id: I94f86de9e2a6303151c2f0e6454b5f629cbc9444 Reviewed-on: http://gerrit.cloudera.org:8080/18653 Reviewed-by: Wenzhe Zhou <wzhou@cloudera.com> Reviewed-by: Joe McDonnell <joemcdonnell@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.