diff --git a/superset/assets/src/explore/components/ExploreViewContainer.jsx b/superset/assets/src/explore/components/ExploreViewContainer.jsx
index 56b5e4319a40f..7990c9be1f971 100644
--- a/superset/assets/src/explore/components/ExploreViewContainer.jsx
+++ b/superset/assets/src/explore/components/ExploreViewContainer.jsx
@@ -131,8 +131,6 @@ class ExploreViewContainer extends React.Component {
 
   /* eslint no-unused-vars: 0 */
   componentDidUpdate(prevProps, prevState) {
-    this.triggerQueryIfNeeded();
-
     const changedControlKeys = this.findChangedControlKeys(prevProps.controls, this.props.controls);
     if (this.hasDisplayControlChanged(changedControlKeys, this.props.controls)) {
       this.addHistory({});
@@ -213,17 +211,6 @@ class ExploreViewContainer extends React.Component {
     );
   }
 
-  triggerQueryIfNeeded() {
-    if (this.props.chart.triggerQuery && !this.hasErrors()) {
-      this.props.actions.postChartFormData(
-        this.props.form_data,
-        false,
-        this.props.timeout,
-        this.props.chart.id,
-      );
-    }
-  }
-
   addHistory({ isReplace = false, title }) {
     const { payload } = getExploreUrlAndPayload({ formData: this.props.form_data });
     const longUrl = getExploreLongUrl(this.props.form_data, null, false);
diff --git a/superset/db_engine_specs/presto.py b/superset/db_engine_specs/presto.py
index a2b02cdcf409d..ff03d540f234b 100644
--- a/superset/db_engine_specs/presto.py
+++ b/superset/db_engine_specs/presto.py
@@ -24,7 +24,7 @@
 from typing import List, Set, Tuple
 from urllib import parse
 
-from sqlalchemy import Column, literal_column, types
+from sqlalchemy import Column, literal_column
 from sqlalchemy.engine.base import Engine
 from sqlalchemy.engine.reflection import Inspector
 from sqlalchemy.engine.result import RowProxy
@@ -231,7 +231,9 @@ def get_columns(
         for column in columns:
             try:
                 # parse column if it is a row or array
-                if "array" in column.Type or "row" in column.Type:
+                if is_feature_enabled("PRESTO_EXPAND_DATA") and (
+                    "array" in column.Type or "row" in column.Type
+                ):
                     structural_column_index = len(result)
                     cls._parse_structural_column(column.Column, column.Type, result)
                     result[structural_column_index]["nullable"] = getattr(
@@ -247,7 +249,7 @@ def get_columns(
                         column.Type, column.Column
                     )
                 )
-                column_type = types.NullType
+                column_type = "OTHER"
             column_info = cls._create_column_info(column.Column, column_type)
             column_info["nullable"] = getattr(column, "Null", True)
             column_info["default"] = None
@@ -352,7 +354,7 @@ def select_star(
         to an array's contents.
         """
         presto_cols = cols
-        if show_cols:
+        if is_feature_enabled("PRESTO_EXPAND_DATA") and show_cols:
             dot_regex = r"\.(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)"
             presto_cols = [
                 col for col in presto_cols if not re.search(dot_regex, col["name"])
diff --git a/tests/db_engine_specs_test.py b/tests/db_engine_specs_test.py
index acd7180f1ca4f..1b0d87c6f1689 100644
--- a/tests/db_engine_specs_test.py
+++ b/tests/db_engine_specs_test.py
@@ -360,16 +360,25 @@ def test_presto_get_column(self):
         expected_results = [("column_name", "BOOLEAN")]
         self.verify_presto_column(presto_column, expected_results)
 
+    @mock.patch.dict(
+        "superset._feature_flags", {"PRESTO_EXPAND_DATA": True}, clear=True
+    )
     def test_presto_get_simple_row_column(self):
         presto_column = ("column_name", "row(nested_obj double)", "")
         expected_results = [("column_name", "ROW"), ("column_name.nested_obj", "FLOAT")]
         self.verify_presto_column(presto_column, expected_results)
 
+    @mock.patch.dict(
+        "superset._feature_flags", {"PRESTO_EXPAND_DATA": True}, clear=True
+    )
     def test_presto_get_simple_row_column_with_name_containing_whitespace(self):
         presto_column = ("column name", "row(nested_obj double)", "")
         expected_results = [("column name", "ROW"), ("column name.nested_obj", "FLOAT")]
         self.verify_presto_column(presto_column, expected_results)
 
+    @mock.patch.dict(
+        "superset._feature_flags", {"PRESTO_EXPAND_DATA": True}, clear=True
+    )
     def test_presto_get_simple_row_column_with_tricky_nested_field_name(self):
         presto_column = ("column_name", 'row("Field Name(Tricky, Name)" double)', "")
         expected_results = [
@@ -378,11 +387,17 @@ def test_presto_get_simple_row_column_with_tricky_nested_field_name(self):
         ]
         self.verify_presto_column(presto_column, expected_results)
 
+    @mock.patch.dict(
+        "superset._feature_flags", {"PRESTO_EXPAND_DATA": True}, clear=True
+    )
     def test_presto_get_simple_array_column(self):
         presto_column = ("column_name", "array(double)", "")
         expected_results = [("column_name", "ARRAY")]
         self.verify_presto_column(presto_column, expected_results)
 
+    @mock.patch.dict(
+        "superset._feature_flags", {"PRESTO_EXPAND_DATA": True}, clear=True
+    )
     def test_presto_get_row_within_array_within_row_column(self):
         presto_column = (
             "column_name",
@@ -397,6 +412,9 @@ def test_presto_get_row_within_array_within_row_column(self):
         ]
         self.verify_presto_column(presto_column, expected_results)
 
+    @mock.patch.dict(
+        "superset._feature_flags", {"PRESTO_EXPAND_DATA": True}, clear=True
+    )
     def test_presto_get_array_within_row_within_array_column(self):
         presto_column = (
             "column_name",