mistercrunch closed pull request #4882: Implement Snowflake engine with
supported time grains
URL: https://github.com/apache/incubator-superset/pull/4882
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diff --git a/docs/installation.rst b/docs/installation.rst
index be4abe8168..ca9cf3f595 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -298,6 +298,8 @@ Here's a list of some of the recommended packages.
+---------------+-------------------------------------+-------------------------------------------------+
| sqlite | | ``sqlite://``
|
+---------------+-------------------------------------+-------------------------------------------------+
+| Snowflake | ``pip install snowflake-sqlalchemy``| ``snowflake://``
|
++---------------+-------------------------------------+-------------------------------------------------+
| Redshift | ``pip install sqlalchemy-redshift`` |
``redshift+psycopg2://`` |
+---------------+-------------------------------------+-------------------------------------------------+
| MSSQL | ``pip install pymssql`` | ``mssql://``
|
diff --git a/superset/db_engine_specs.py b/superset/db_engine_specs.py
index 0c7444c3f0..49dd39cd6d 100644
--- a/superset/db_engine_specs.py
+++ b/superset/db_engine_specs.py
@@ -334,6 +334,22 @@ def get_table_names(cls, schema, inspector):
return sorted(tables)
+class SnowflakeEngineSpec(PostgresBaseEngineSpec):
+ engine = 'snowflake'
+
+ time_grains = (
+ Grain('Time Column', _('Time Column'), '{col}', None),
+ Grain('second', _('second'), "DATE_TRUNC('SECOND', {col})", 'PT1S'),
+ Grain('minute', _('minute'), "DATE_TRUNC('MINUTE', {col})", 'PT1M'),
+ Grain('hour', _('hour'), "DATE_TRUNC('HOUR', {col})", 'PT1H'),
+ Grain('day', _('day'), "DATE_TRUNC('DAY', {col})", 'P1D'),
+ Grain('week', _('week'), "DATE_TRUNC('WEEK', {col})", 'P1W'),
+ Grain('month', _('month'), "DATE_TRUNC('MONTH', {col})", 'P1M'),
+ Grain('quarter', _('quarter'), "DATE_TRUNC('QUARTER', {col})",
'P0.25Y'),
+ Grain('year', _('year'), "DATE_TRUNC('YEAR', {col})", 'P1Y'),
+ )
+
+
class VerticaEngineSpec(PostgresBaseEngineSpec):
engine = 'vertica'
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