Adds two additional environment variables

* `IBIS_TEST_HDFS_HOST`
* `IBIS_TEST_WEBHDFS_PORT`

that default to a localhost dev environment.

Fixes #324.

…314

Add logging per #287 and overwrite=True implementation per #296

Author: Wes McKinney <wes@cloudera.com>

Closes #333 from wesm/hdfs-get-overwrite and squashes the following commits:

f983d94 [Wes McKinney] Test directory overwrite and add basic logging per #287 and #296
1afb05f [Wes McKinney] Add overwrite support to HDFS.get for single files

…#304

…per #78 and #307

Before the fix, this required the user to have numpy installed, even if they were not going to use the comms extension.

Changes are:
* Fixing lots of strings for .format() to include the explicit arg number.
* Using the set() constructor instead of set literals
* Added argparse to requirements if installing on py2.6
* Refactoring out the use of subprocess.check_output()
* Import unittest2 when using py2.6
* Added ibis.compat for the new unittest

Fixes #215.

Implements all string features except 'space'. Discussed and decided
'space' was not neccesary. per #256

Author: Meghana Vuyyuru <megvuyyuru@gmail.com>

Closes #338 from megvuyyuru/str-blitz and squashes the following commits:

7aaaacd [Meghana Vuyyuru] TST: More robust checking of builtin string,int, and double functions
c243154 [Meghana Vuyyuru] ENH: All input arguments and return values now 0-indexed
edd2327 [Meghana Vuyyuru] ENH: Changed find_in_set to take a list of strings
c9dcc25 [Meghana Vuyyuru] STY: flake8 cleanup
41d78ea [Meghana Vuyyuru] ENH: String join method that mirrors python's join function. Removes concat and concat_ws
3444c4c [Meghana Vuyyuru] STY: Reduces code duplication in SQL generation and improves some docstrings
bdd9749 [Meghana Vuyyuru] STY: Moving code around for better flow
f495abd [Meghana Vuyyuru] Updating avro_schema test
63b8250 [Meghana Vuyyuru] STY: Moving string functions to proper dict. Closes #256
2a4fa5b [Meghana Vuyyuru] ENH: String function 're_extract', 're_replace' added
864b1e9 [Meghana Vuyyuru] ENH: string function concat, concat_ws added
d3203a9 [Meghana Vuyyuru] ENH, STY: Adds lpad, rpad. Cleans up test file
9d84b3e [Meghana Vuyyuru] ENH: String function 'translate', 'locate', 'find_in_set' now implemented and tested
6842ed5 [Meghana Vuyyuru] ENH: String function instr now implemented and tested.
325a37c [Meghana Vuyyuru] CLN: Creates and uses _int_output function to mirror _string_output paradigm
0edc24d [Meghana Vuyyuru] ENH String functions 'reverse', 'repeat' added
8d4f4c8 [Meghana Vuyyuru] ENH: String functions added: trim, ltrim, trim
ce50b51 [Meghana Vuyyuru] ENH: String function 'ascii' added

…str.find

…y. part of

Test now uses an HDFS path that the user "guarantees" is writable.

Fixes #339

Adds a set of input type declaration API that validate operation
types. Removed as many operation constructors as I could and
simplified some code in `ibis/sql/exprs.py`. Some bugs were uncovered
in the process and can be addressed separately.    Some related
issues: #331, #305, #285, #345, #346

Author: Wes McKinney <wes@cloudera.com>

Closes #347 from wesm/type-validation and squashes the following commits:

1423839 [Wes McKinney] Type decl for timedelta
87acc6c [Wes McKinney] Joint type checker for checking array[boolean]
e458e5b [Wes McKinney] Varargs validation, more arg types and common code use
c165f83 [Wes McKinney] Data type name validator
8f28dbf [Wes McKinney] Get rid of ensure_array cruft
546b70f [Wes McKinney] Implement ListOf validator. Raise exceptions out of type validation
916f9da [Wes McKinney] Argument validators as classes
a3273a8 [Wes McKinney] Move more user APIs to api.py
3383748 [Wes McKinney] Handle int expr for pos in locate
82f93b3 [Wes McKinney] More type cleaning. Fix up analytics.py
9b34a3b [Wes McKinney] Bunch of refactoring and work on type validation, miscellanea
ad5746d [Wes McKinney] Initial type validation experiment and some light refactoring
e62fd5c [Wes McKinney] Stubs
1f73b9e [Wes McKinney] Remove some redundant root_tables and type checking functions
485cf40 [Wes McKinney] Refactoring some code into rules.py. Remove MultiExprNode and generalize root analysis for ValueNode

Creates a new ImpalaClient object without ibis_testing as default db.

Test will fail if the default database happens to have a table called `functional_alltypes`.  Seems unlikely, though.

Fixes #340.

Impala has some inconsistent type output in `isnull`. In the meantime,
I'm inserting an explicit cast hack. per #345

Author: Wes McKinney <wes@cloudera.com>

Closes #357 from wesm/isnull-decimal-type-issue and squashes the following commits:

b9b53db [Wes McKinney] Little decimal cast hack to work around Impala issue
54dc026 [Wes McKinney] Enable argument checkers to see all arguments

 #349

…lose #350

Accidentally referenced `tpch.region` instead of `tpch_region`.
The schema for `tpch_region` is now manually specified to `int16` in the data-loading script bc schema inference assumes it's `int32` bc of parquet.

Fixes #341.

Fixes #343.

…specify a local directory vs pulling from S3 per #289

…all. Close #359

Adds two Impala built-in string functions. Refactors some functions to
better mirror Python string functions. #316

Author: Meghana Vuyyuru <megvuyyuru@gmail.com>

Closes #356 from megvuyyuru/str-cleanup and squashes the following commits:

218e95c [Meghana Vuyyuru] STY: Reduced duplicate code
fb2dc75 [Meghana Vuyyuru] ENH: Added capitalize, parse_url

…315

…#346

…lose #277

…8 cleanup

 #257

Closes #226 and #199.

Author: Wes McKinney <wes@cloudera.com>

Closes #367 from wesm/ibis-temp-db and squashes the following commits:

34547e0 [Wes McKinney] Use /tmp/ibis as more likely to be writable
fe44662 [Wes McKinney] ENH: add configurable impala.temp_db/temp_hdfs_path options per #199, #226

Closes #303. Set of supported units to `trunc` and their appearance in
Ibis should be reviewed at some point.

Author: Wes McKinney <wes@cloudera.com>

Closes #368 from wesm/timestamp-truncate and squashes the following commits:

c8f7807 [Wes McKinney] Finish basic truncate implementation and tests
c5cab51 [Wes McKinney] Initial truncate scaffold

Fixes #371.

Fixes #370.

Fixes #293.

Fixes #375.