Implementing druid's regex filters

caravel/forms.py

@@ -642,29 +642,18 @@ class QueryForm(OmgWtForm):
             collapsed_fieldsets = HiddenField()
             viz_type = self.field_dict.get('viz_type')
 
-        filter_cols = viz.datasource.filterable_column_names or ['']
-        for i in range(10):
-            setattr(QueryForm, 'flt_col_' + str(i), SelectField(
-                'Filter 1',
-                default=filter_cols[0],
-                choices=self.choicify(filter_cols)))
-            setattr(QueryForm, 'flt_op_' + str(i), SelectField(
-                'Filter 1',
-                default='in',
-                choices=self.choicify(['in', 'not in'])))
-            setattr(
-                QueryForm, 'flt_eq_' + str(i),
-                TextField("Super", default=''))
-
         for field in viz.flat_form_fields():
             setattr(QueryForm, field, self.field_dict[field])
 
         def add_to_form(attrs):
             for attr in attrs:
                 setattr(QueryForm, attr, self.field_dict[attr])
 
+        filter_choices = self.choicify(['in', 'not in'])
         # datasource type specific form elements
-        if viz.datasource.__class__.__name__ == 'SqlaTable':
+        datasource_classname = viz.datasource.__class__.__name__
+        time_fields = None
+        if datasource_classname == 'SqlaTable':
             QueryForm.fieldsets += ({
                 'label': 'SQL',
                 'fields': ['where', 'having'],
@@ -675,8 +664,6 @@ def add_to_form(attrs):
             add_to_form(('where', 'having'))
             grains = viz.datasource.database.grains()
 
-            if not viz.datasource.any_dttm_col:
-                return QueryForm
             if grains:
                 time_fields = ('granularity_sqla', 'time_grain_sqla')
                 self.field_dict['time_grain_sqla'] = SelectField(
@@ -695,19 +682,35 @@ def add_to_form(attrs):
             else:
                 time_fields = 'granularity_sqla'
                 add_to_form((time_fields, ))
-        else:
+        elif datasource_classname == 'DruidDatasource':
             time_fields = ('granularity', 'druid_time_origin')
             add_to_form(('granularity', 'druid_time_origin'))
             field_css_classes['granularity'] = ['form-control', 'select2_freeform']
             field_css_classes['druid_time_origin'] = ['form-control', 'select2_freeform']
+            filter_choices = self.choicify(['in', 'not in', 'regex'])
         add_to_form(('since', 'until'))
 
-        QueryForm.fieldsets = ({
-            'label': 'Time',
-            'fields': (
-                time_fields,
-                ('since', 'until'),
-            ),
-            'description': "Time related form attributes",
-        },) + tuple(QueryForm.fieldsets)
+        filter_cols = viz.datasource.filterable_column_names or ['']
+        for i in range(10):
+            setattr(QueryForm, 'flt_col_' + str(i), SelectField(
+                'Filter 1',
+                default=filter_cols[0],
+                choices=self.choicify(filter_cols)))
+            setattr(QueryForm, 'flt_op_' + str(i), SelectField(
+                'Filter 1',
+                default='in',
+                choices=filter_choices))
+            setattr(
+                QueryForm, 'flt_eq_' + str(i),
+                TextField("Super", default=''))
+
+        if time_fields:
+            QueryForm.fieldsets = ({
+                'label': 'Time',
+                'fields': (
+                    time_fields,
+                    ('since', 'until'),
+                ),
+                'description': "Time related form attributes",
+            },) + tuple(QueryForm.fieldsets)
         return QueryForm

caravel/models.py

@@ -1171,6 +1171,8 @@ def recursive_get_fields(_conf):
                     cond = Dimension(col) == eq
                 if op == 'not in':
                     cond = ~cond
+            elif op == 'regex':
+                cond = Filter(type="regex", pattern=eq, dimension=col)
             if filters:
                 filters = Filter(type="and", fields=[
                     Filter.build_filter(cond),
@@ -1201,7 +1203,8 @@ def recursive_get_fields(_conf):
             }
             client.groupby(**pre_qry)
             query_str += "// Two phase query\n// Phase 1\n"
-            query_str += json.dumps(client.query_dict, indent=2) + "\n"
+            query_str += json.dumps(
+                client.query_builder.last_query.query_dict, indent=2) + "\n"
             query_str += "//\nPhase 2 (built based on phase one's results)\n"
             df = client.export_pandas()
             if df is not None and not df.empty:
@@ -1237,7 +1240,8 @@ def recursive_get_fields(_conf):
                 }],
             }
         client.groupby(**qry)
-        query_str += json.dumps(client.query_dict, indent=2)
+        query_str += json.dumps(
+            client.query_builder.last_query.query_dict, indent=2)
         df = client.export_pandas()
         if df is None or df.size == 0:
             raise Exception(_("No data was returned."))

caravel/views.py

@@ -23,7 +23,6 @@
 from flask.ext.babelpkg import gettext as _
 from flask_appbuilder.models.sqla.filters import BaseFilter
 
-from pydruid.client import doublesum
 from sqlalchemy import create_engine, select, text
 from sqlalchemy.sql.expression import TextAsFrom
 from werkzeug.routing import BaseConverter
@@ -904,22 +903,6 @@ def refresh_datasources(self):
         session.commit()
         return redirect("/druiddatasourcemodelview/list/")
 
-    @expose("/autocomplete/<datasource>/<column>/")
-    def autocomplete(self, datasource, column):
-        """used for filter autocomplete"""
-        client = utils.get_pydruid_client()
-        top = client.topn(
-            datasource=datasource,
-            granularity='all',
-            intervals='2013-10-04/2020-10-10',
-            aggregations={"count": doublesum("count")},
-            dimension=column,
-            metric='count',
-            threshold=1000,
-        )
-        values = sorted([d[column] for d in top[0]['result']])
-        return json.dumps(values)
-
     @app.errorhandler(500)
     def show_traceback(self):
         if config.get("SHOW_STACKTRACE"):

setup.py

@@ -31,7 +31,7 @@
         'markdown>=2.6.2, <3.0.0',
         'pandas==0.18.0',
         'parsedatetime==2.0.0',
-        'pydruid>=0.2.2, <0.3',
+        'pydruid>=0.2.3, <0.4',
         'python-dateutil>=2.4.2, <3.0.0',
         'requests>=2.7.0, <3.0.0',
         'sqlalchemy>=1.0.12, <2.0.0',

tests/core_tests.py

@@ -319,6 +319,7 @@ def test_client(self, PyDruid):
         df = pd.DataFrame(nres)
         instance.export_pandas.return_value = df
         instance.query_dict = {}
+        instance.query_builder.last_query.query_dict = {}
         resp = self.client.get('/caravel/explore/druid/1/?viz_type=table&granularity=one+day&druid_time_origin=&since=7+days+ago&until=now&row_limit=5000&include_search=false&metrics=count&groupby=name&flt_col_0=dim1&flt_op_0=in&flt_eq_0=&slice_id=&slice_name=&collapsed_fieldsets=&action=&datasource_name=test_datasource&datasource_id=1&datasource_type=druid&previous_viz_type=table&json=true&force=true')
         print('-'*300)
         print(resp.data.decode('utf-8'))