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WIP: Initial commit to support the athena DB #2531

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merged 3 commits into from
Apr 3, 2017
Merged

WIP: Initial commit to support the athena DB #2531

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4db9d34
Initial commit to support the athena DB
Mar 31, 2017
c0abb4d
Rebased, and fixed two lint issues
Mar 31, 2017
7b42dde
rename athena engine: athena -> awsathena
Apr 2, 2017
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42 changes: 42 additions & 0 deletions superset/db_engine_specs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -729,6 +729,48 @@ def convert_dttm(cls, target_type, dttm):
class VerticaEngineSpec(PostgresEngineSpec):
engine = 'vertica'


class AthenaEngineSpec(BaseEngineSpec):
engine = 'awsathena'

time_grains = (
Grain('Time Column', _('Time Column'), '{col}'),
Grain('second', _('second'),
"date_trunc('second', CAST({col} AS TIMESTAMP))"),
Grain('minute', _('minute'),
"date_trunc('minute', CAST({col} AS TIMESTAMP))"),
Grain('hour', _('hour'),
"date_trunc('hour', CAST({col} AS TIMESTAMP))"),
Grain('day', _('day'),
"date_trunc('day', CAST({col} AS TIMESTAMP))"),
Grain('week', _('week'),
"date_trunc('week', CAST({col} AS TIMESTAMP))"),
Grain('month', _('month'),
"date_trunc('month', CAST({col} AS TIMESTAMP))"),
Grain('quarter', _('quarter'),
"date_trunc('quarter', CAST({col} AS TIMESTAMP))"),
Grain("week_ending_saturday", _('week_ending_saturday'),
"date_add('day', 5, date_trunc('week', date_add('day', 1, "
"CAST({col} AS TIMESTAMP))))"),
Grain("week_start_sunday", _('week_start_sunday'),
"date_add('day', -1, date_trunc('week', "
"date_add('day', 1, CAST({col} AS TIMESTAMP))))"),
)

@classmethod
def convert_dttm(cls, target_type, dttm):
tt = target_type.upper()
if tt == 'DATE':
return "from_iso8601_date('{}')".format(dttm.isoformat()[:10])
if tt == 'TIMESTAMP':
return "from_iso8601_timestamp('{}')".format(dttm.isoformat())
return ("CAST ('{}' AS TIMESTAMP)"
.format(dttm.strftime('%Y-%m-%d %H:%M:%S')))

@classmethod
def epoch_to_dttm(cls):
return "from_unixtime({col})"

engines = {
o.engine: o for o in globals().values()
if inspect.isclass(o) and issubclass(o, BaseEngineSpec)}