sadpandajoe commented on code in PR #43771:
URL: https://github.com/apache/superset/pull/43771#discussion_r4203089075


##########
superset/mcp_service/chart/schemas.py:
##########
@@ -3867,6 +5073,134 @@ def _normalize_chart_request_input(data: Any) -> Any:
                 config.pop("viz_type", None)
         elif config.get("chart_type") != "table":
             config.pop("viz_type", None)
+
+        if config.get("chart_type") == "xy":
+            # Native Timeseries form data uses ``x_axis`` for the semantic
+            # query column, while the typed MCP contract uses the same spelling
+            # for AxisConfig presentation state. Disambiguate before the
+            # discriminated union runs: scalars and native query-column objects
+            # become ``x``; title/format/scale mappings remain ``x_axis``.
+            if "x_axis" in config and config["x_axis"] is not None:
+                native_x_axis = config["x_axis"]
+                is_native_column = not isinstance(native_x_axis, dict) or bool(
+                    {
+                        "column",
+                        "column_name",
+                        "columnName",
+                        "expressionType",
+                        "sqlExpression",
+                    }
+                    & set(native_x_axis)
+                )
+                if is_native_column:
+                    if "x" in config:
+                        raise ValueError(
+                            "XY config cannot provide both semantic x and 
native "
+                            "x_axis query columns"
+                        )
+                    if isinstance(native_x_axis, dict):
+                        allowed_x_axis_keys = {
+                            "column",
+                            "column_name",
+                            "columnName",
+                            "columnType",
+                            "expressionType",
+                            "label",
+                            "sqlExpression",
+                            "timeGrain",
+                        }
+                        if unknown := set(native_x_axis) - allowed_x_axis_keys:
+                            raise ValueError(
+                                "Unknown XY native x_axis field(s): "
+                                + ", ".join(sorted(unknown))
+                            )
+                        expression_type = native_x_axis.get("expressionType")
+                        if expression_type == "SIMPLE":
+                            column = native_x_axis.get("column")
+                            if isinstance(column, dict):
+                                column = XYNativeMetricColumn.model_validate(
+                                    column
+                                ).column_name
+                            native_x_axis = {
+                                "name": native_x_axis.get("column_name")
+                                or native_x_axis.get("columnName")
+                                or column,
+                            }
+                        elif (
+                            expression_type == "SQL"
+                            and native_x_axis.get("columnType") == "BASE_AXIS"
+                        ):
+                            native_x_axis = {
+                                "name": native_x_axis.get("sqlExpression"),

Review Comment:
   The XY native-axis normalizer accepts `timeGrain` for a `BASE_AXIS` SQL 
x-axis (line 5110) but rebuilds the axis as only `name`/`label`, so the grain 
is dropped. A native line-chart config with 
`x_axis={"expressionType":"SQL","columnType":"BASE_AXIS","sqlExpression":"ds","label":"ds","timeGrain":"P1M"}`
 and no panel-level `time_grain` validates, but the generated/updated chart 
queries an unbucketed `ds` instead of monthly aggregates. Should the grain be 
carried over to `config.time_grain` here, or rejected as unsupported?



##########
superset/mcp_service/chart/chart_utils.py:
##########
@@ -1694,6 +1772,790 @@ def map_bubble_config(config: BubbleChartConfig) -> 
Dict[str, Any]:
     return form_data
 
 
+def map_sunburst_config(config: SunburstChartConfig) -> Dict[str, Any]:
+    """Map typed Sunburst config to the ECharts ``sunburst_v2`` form_data.
+
+    The frontend control panel stores hierarchy levels under ``columns`` and
+    metrics under singular ``metric`` / ``secondary_metric`` keys.  Its
+    buildQuery adds primary-metric descending ordering when ``sort_by_metric``
+    is enabled; server-side query builders mirror that transform separately.
+    """
+    form_data: Dict[str, Any] = {
+        "viz_type": "sunburst_v2",
+        "columns": [dimension.name for dimension in config.hierarchy],
+        "metric": create_metric_object(config.metric),
+        "sort_by_metric": config.sort_by_metric,
+        "row_limit": config.row_limit,
+        "show_labels": config.show_labels,
+        "show_labels_threshold": config.show_labels_threshold,
+        "show_total": config.show_total,
+        "show_null_values": config.show_null_values,
+        "label_type": config.label_type,
+        "number_format": config.number_format,
+        "date_format": config.date_format,
+    }
+    if config.secondary_metric is not None:
+        form_data["secondary_metric"] = 
create_metric_object(config.secondary_metric)
+    if config.color_scheme is not None:
+        form_data["color_scheme"] = config.color_scheme
+    if config.linear_color_scheme is not None:
+        form_data["linear_color_scheme"] = config.linear_color_scheme
+    if config.time_range is not None:
+        form_data["time_range"] = config.time_range
+    if config.temporal_column is not None:
+        form_data["granularity_sqla"] = config.temporal_column
+    if config.time_grain is not None:
+        form_data["time_grain_sqla"] = config.time_grain
+
+    _copy_sunburst_native_envelope(form_data, config)
+
+    add_currency_format(form_data, config.currency_format)
+    _add_adhoc_filters(form_data, config.filters)
+    return form_data
+
+
+# Sunburst fields with explicit omission/clear semantics. Mapper defaults must
+# not overwrite same-viz state when the typed field was omitted, while explicit
+# clears must also beat the shared preservation registry on cross-viz updates.
+# Required query roles (hierarchy and metric) are deliberately absent: a full
+# replacement always updates them.
+_SUNBURST_UPDATE_FIELD_KEYS: dict[str, str] = {
+    "time_range": "time_range",
+    "time_grain": "time_grain_sqla",
+    "temporal_column": "granularity_sqla",
+    "sort_by_metric": "sort_by_metric",
+    "row_limit": "row_limit",
+    "color_scheme": "color_scheme",
+    "linear_color_scheme": "linear_color_scheme",
+    "show_labels": "show_labels",
+    "show_labels_threshold": "show_labels_threshold",
+    "show_total": "show_total",
+    "show_null_values": "show_null_values",
+    "label_type": "label_type",
+    "number_format": "number_format",
+    "date_format": "date_format",
+    "currency_format": "currency_format",
+    "extra_form_data": "extra_form_data",
+    "url_params": "url_params",
+    "standardized_form_data": "standardizedFormData",
+}
+
+
+# Presentation controls emitted sparsely by chart mappers need three-way update
+# semantics: omitted preserves saved native state, an explicit value replaces
+# it, and explicit ``None``/``False`` clears a truthy saved value when the 
mapper
+# has no canonical false/null representation.  Query roles are intentionally
+# absent: a replacement config always owns those through the plugin contract.
+# Paths below also cover nested axis/legend models so an omitted nested 
property
+# is not mistaken for an explicit clear of the whole control.
+_MODELED_UPDATE_CONTROL_PATHS: dict[str, dict[str, tuple[tuple[str, ...], 
...]]] = {
+    "GaugeChartConfig": {
+        key: ((key,),)
+        for key in (
+            "sort_by_metric",
+            "row_limit",
+            "min_val",
+            "max_val",
+            "color_scheme",
+            "font_size",
+            "number_format",
+            "currency_format",
+            "value_formatter",
+            "start_angle",
+            "end_angle",
+            "show_pointer",
+            "animation",
+            "show_axis_tick",
+            "show_split_line",
+            "split_number",
+            "show_progress",
+            "overlap",
+            "round_cap",
+            "intervals",
+            "interval_color_indices",
+            "time_range",
+            "granularity_sqla",
+        )
+    },
+    "PieChartConfig": {
+        "color_scheme": (("color_scheme",),),
+        "show_labels": (("show_labels",),),
+        "show_legend": (("show_legend",),),
+        "legendOrientation": (("legend_orientation",),),
+        "label_type": (("label_type",),),
+        "number_format": (("number_format",),),
+        "date_format": (("date_format",),),
+        "sort_by_metric": (("sort_by_metric",),),
+        "row_limit": (("row_limit",),),
+        "donut": (("donut",),),
+        "show_total": (("show_total",),),
+        "labels_outside": (("labels_outside",),),
+        "outerRadius": (("outer_radius",),),
+        "innerRadius": (("inner_radius",),),
+        "currency_format": (("currency_format",),),
+    },
+    "TableChartConfig": {
+        "order_by_cols": (("sort_by",),),
+        "row_limit": (("row_limit",),),
+        "color_scheme": (("color_scheme",),),
+        "column_config": (("column_config",),),
+    },
+    "XYChartConfig": {
+        "row_limit": (("row_limit",),),
+        "series_limit": (("series_limit",),),
+        "stack": (("stacked",),),
+        "orientation": (("orientation",),),
+        "x_axis_title": (("x_axis", "title"),),
+        "x_axis_format": (("x_axis", "format"),),
+        "y_axis_title": (("y_axis", "title"),),
+        "y_axis_format": (("y_axis", "format"),),
+        "y_axis_scale": (("y_axis", "scale"),),
+        "show_legend": (("legend", "show"),),
+        "legendOrientation": (("legend", "position"), ("legend_orientation",)),
+        "x_axis_time_format": (("x_axis_time_format",),),
+        "show_value": (("show_value",),),
+        "currency_format": (("currency_format",),),
+        "color_scheme": (("color_scheme",),),
+    },
+    "HistogramChartConfig": {
+        "bins": (("bins",),),
+        "normalize": (("normalize",),),
+        "cumulative": (("cumulative",),),
+        "row_limit": (("row_limit",),),
+    },
+    "BoxPlotChartConfig": {
+        "whiskerOptions": (
+            ("whisker_type",),
+            ("percentile_low",),
+            ("percentile_high",),
+        ),
+        "row_limit": (("row_limit",),),
+        "number_format": (("number_format",),),
+        "date_format": (("date_format",),),
+    },
+    "GanttChartConfig": {
+        "tooltip_columns": (("tooltip_columns",),),
+        "tooltip_metrics": (("tooltip_metrics",),),
+        "order_by_cols": (("order_by",),),
+        "row_limit": (("row_limit",),),
+    },
+    "WaterfallChartConfig": {
+        "show_total": (("show_total",),),
+        "show_legend": (("show_legend",),),
+        "increase_label": (("increase_label",),),
+        "decrease_label": (("decrease_label",),),
+        "total_label": (("total_label",),),
+        "x_axis_time_format": (("x_axis_time_format",),),
+        "y_axis_format": (("y_axis_format",),),
+        "currency_format": (("currency_format",),),
+        "row_limit": (("row_limit",),),
+    },
+    "BigNumberChartConfig": {
+        "subheader": (("subheader",),),
+        "y_axis_format": (("y_axis_format",),),
+        "time_format": (("time_format",),),
+        "currency_format": (("currency_format",),),
+        "color_scheme": (("color_scheme",),),
+        "start_y_axis_at_zero": (("start_y_axis_at_zero",),),
+        "compare_lag": (("compare_lag",),),
+        "aggregation": (("aggregation",),),
+    },
+    "HandlebarsChartConfig": {
+        "row_limit": (("row_limit",),),
+        "order_desc": (("order_desc",),),
+        "styleTemplate": (("style_template",),),
+    },
+    "PivotTableChartConfig": {
+        "aggregateFunction": (("aggregate_function",),),
+        "rowTotals": (("show_row_totals",),),
+        "colTotals": (("show_column_totals",),),
+        "transposePivot": (("transpose",),),
+        "combineMetric": (("combine_metric",),),
+        "valueFormat": (("value_format",),),
+        "date_format": (("date_format",),),
+        "currency_format": (("currency_format",),),
+        "row_limit": (("row_limit",),),
+    },
+    "InteractivePivotChartConfig": {
+        "order_desc": (("sort_descending",),),
+        "row_limit": (("row_limit",),),
+        "rowGroupCounts": (("show_row_group_counts",),),
+        "rowTotals": (("show_row_totals",),),
+        "colTotals": (("show_column_totals",),),
+        "colSubTotals": (("show_column_subtotals",),),
+        "valueFormat": (("value_format",),),
+        "date_format": (("date_format",),),
+        "currency_format": (("currency_format",),),
+        "colOrder": (("column_sort",),),
+        "allow_render_html": (("allow_render_html",),),
+        "expand_pivot_groups": (("expand_pivot_groups",),),
+        "time_compare": (("comparison_period",),),
+        "comparison_type": (("comparison_type",),),
+    },
+    "MixedTimeseriesChartConfig": {
+        "seriesType": (("primary_kind",),),
+        "area": (("primary_kind",),),
+        "seriesTypeB": (("secondary_kind",),),
+        "areaB": (("secondary_kind",),),
+        "show_legend": (("show_legend",),),
+        "legendOrientation": (("legend_orientation",),),
+        "show_value": (("show_value",),),
+        "color_scheme": (("color_scheme",),),
+        "currency_format": (("currency_format",),),
+        "currency_format_secondary": (("currency_format_secondary",),),
+        "xAxisTitle": (("x_axis", "title"),),
+        "x_axis_time_format": (("x_axis", "format"),),
+        "yAxisTitle": (("y_axis", "title"),),
+        "y_axis_format": (("y_axis", "format"),),
+        "logAxis": (("y_axis", "scale"),),
+        "yAxisTitleSecondary": (("y_axis_secondary", "title"),),
+        "y_axis_format_secondary": (("y_axis_secondary", "format"),),
+        "logAxisSecondary": (("y_axis_secondary", "scale"),),
+        "row_limit": (("row_limit",),),
+    },
+}
+
+
+def _model_path_was_set(config: Any, path: tuple[str, ...]) -> bool:
+    """Return whether every component of a Pydantic model path was supplied."""
+    current = config
+    for field_name in path:
+        if field_name not in getattr(current, "model_fields_set", set()):
+            return False
+        current = getattr(current, field_name, None)
+        if current is None:
+            # An explicit null parent clears all of its mapped descendants.
+            return True
+    return True
+
+
+def _apply_modeled_update_semantics(
+    existing_form_data: Mapping[str, Any],
+    new_form_data: Dict[str, Any],
+    config: Any,
+) -> set[str]:
+    """Preserve truly omitted modeled controls and return explicit clears."""
+    explicit_clears: set[str] = set()
+    controls = _MODELED_UPDATE_CONTROL_PATHS.get(type(config).__name__, {})
+    for form_key, paths in controls.items():
+        if any(_model_path_was_set(config, path) for path in paths):
+            if form_key not in new_form_data:
+                explicit_clears.add(form_key)
+            continue
+        if form_key in existing_form_data:
+            new_form_data[form_key] = existing_form_data[form_key]
+        else:
+            new_form_data.pop(form_key, None)
+    return explicit_clears
+
+
+_TEMPORAL_FORM_DATA_KEYS = frozenset(
+    {
+        "granularity",
+        "granularity_sqla",
+        "since",
+        "time_grain",
+        "time_grain_sqla",
+        "time_range",
+        "until",
+    }
+)
+
+
+def _is_temporal_filter(filter_: Any) -> bool:
+    """Return whether a native, adhoc, or legacy filter carries a time 
range."""
+    return isinstance(filter_, dict) and (
+        filter_.get("operator") == FilterOperator.TEMPORAL_RANGE.value
+        or filter_.get("op") == FilterOperator.TEMPORAL_RANGE.value
+        or filter_.get("col") in {"__time_col", "__time_grain", "__time_range"}
+    )
+
+
+def _without_temporal_filters(value: Any) -> Any:
+    """Copy a filter list without temporal predicates, preserving other 
shapes."""
+    if not isinstance(value, list):
+        return value
+    return [filter_ for filter_ in value if not _is_temporal_filter(filter_)]
+
+
+def _scrub_temporal_form_data(form_data: Mapping[str, Any]) -> Dict[str, Any]:
+    """Remove every source capable of reconstructing explicitly cleared time 
state."""
+    scrubbed = dict(form_data)
+    for key in _TEMPORAL_FORM_DATA_KEYS:
+        scrubbed.pop(key, None)
+    scrubbed.pop(MCP_DASHBOARD_TIME_FILTER_SUBJECT, None)
+
+    for key in ("adhoc_filters", "extra_filters", "filters"):
+        if key in scrubbed:
+            scrubbed[key] = _without_temporal_filters(scrubbed[key])
+
+    extra_form_data = scrubbed.get("extra_form_data")
+    if isinstance(extra_form_data, dict):
+        cleaned_extra = dict(extra_form_data)
+        for key in _TEMPORAL_FORM_DATA_KEYS:
+            cleaned_extra.pop(key, None)
+        for key in ("adhoc_filters", "extra_filters", "filters"):
+            if key in cleaned_extra:
+                cleaned_extra[key] = 
_without_temporal_filters(cleaned_extra[key])
+        scrubbed["extra_form_data"] = cleaned_extra
+    elif extra_form_data is None:
+        scrubbed.pop("extra_form_data", None)
+    return scrubbed
+
+
+# One bounded registry owns state that may survive a form-data replacement.
+# Query roles and plugin-specific controls are deliberately absent. This keeps
+# cross-viz transitions preview/save-safe without chart-by-chart allowlists 
that
+# can drift as new plugins are registered.
+FORM_DATA_UPDATE_PRESERVE_KEYS: dict[str, frozenset[str]] = {
+    "envelope": frozenset(
+        {
+            "dashboardId",
+            "dashboards",
+            "datasource",
+            "extra_form_data",
+            "slice_id",
+            "slice_name",
+            "standardizedFormData",
+            "url_params",
+        }
+    ),
+    "presentation": frozenset(
+        {
+            "color_scheme",
+            "currency_format",
+            "date_format",
+            "legendOrientation",
+            "linear_color_scheme",
+            "number_format",
+            "show_legend",
+        }
+    ),
+    "filters": frozenset({"adhoc_filters", "extra_filters", "filters"}),
+    "time": frozenset(
+        {
+            "granularity_sqla",
+            "since",
+            "time_grain_sqla",
+            "time_range",
+            "until",
+        }
+    ),
+}
+_FORM_DATA_UPDATE_PRESERVE_KEYS = frozenset().union(
+    *FORM_DATA_UPDATE_PRESERVE_KEYS.values()
+)
+
+
+_SAVED_PREDICATE_FORM_DATA_KEYS = frozenset(
+    {"adhoc_filters", "extra_filters", "filters", "having", "where"}
+)
+
+
+def _merge_preserved_adhoc_filters(
+    existing_form_data: Mapping[str, Any],
+    new_form_data: Mapping[str, Any],
+    *,
+    drop_existing_temporal: bool,
+) -> list[Any] | None:
+    """Merge omitted structured filters while removing stale time bindings."""
+    previous = existing_form_data.get("adhoc_filters")
+    generated = new_form_data.get("adhoc_filters")
+    if not isinstance(previous, list):
+        return list(generated) if isinstance(generated, list) else None
+
+    previous_binding = 
existing_form_data.get(MCP_DASHBOARD_TIME_FILTER_SUBJECT)
+    new_binding = new_form_data.get(MCP_DASHBOARD_TIME_FILTER_SUBJECT)
+    merged: list[Any] = []
+    for filter_ in previous:
+        is_temporal = (
+            isinstance(filter_, dict)
+            and filter_.get("operator") == FilterOperator.TEMPORAL_RANGE.value
+        )
+        stale_generated_binding = (
+            is_temporal
+            and previous_binding
+            and previous_binding != new_binding
+            and filter_.get("subject") == previous_binding
+            and filter_.get("comparator") == NO_TIME_RANGE
+        )
+        if (drop_existing_temporal and is_temporal) or stale_generated_binding:
+            continue
+        merged.append(filter_)
+
+    for filter_ in generated if isinstance(generated, list) else []:
+        if isinstance(filter_, dict):
+            same_filter = any(
+                isinstance(previous_filter, dict)
+                and previous_filter.get("clause") == filter_.get("clause")
+                and previous_filter.get("expressionType")
+                == filter_.get("expressionType")
+                and previous_filter.get("subject") == filter_.get("subject")
+                and previous_filter.get("operator") == filter_.get("operator")
+                for previous_filter in merged
+            )
+            if same_filter:
+                continue
+        elif filter_ in merged:
+            continue
+        merged.append(filter_)
+    return merged
+
+
+def _merge_allowlisted_form_data(
+    existing_form_data: Mapping[str, Any],
+    new_form_data: Mapping[str, Any],
+) -> Dict[str, Any]:
+    """Start from mapped target state and add only registry-approved 
omissions."""
+    merged = dict(new_form_data)
+    for key in _FORM_DATA_UPDATE_PRESERVE_KEYS:
+        if key not in merged and key in existing_form_data:
+            merged[key] = existing_form_data[key]
+    return merged
+
+
+def merge_form_data_for_update(
+    existing_form_data: Dict[str, Any],
+    new_form_data: Dict[str, Any],
+    config: Any,
+    *,
+    dataset_rebind: bool = False,
+) -> Dict[str, Any]:
+    """Merge mapped updates without leaking query roles across visualizations.
+
+    Same-viz updates retain native controls outside the simplified MCP schema 
by
+    starting from saved form data. Cross-viz updates remain bounded by the
+    shared preservation registry. Explicit clears are applied last.
+
+    A dataset rebind prunes every dataset-bound role from the saved state and
+    then merges as a same-dataset update, unless the owning plugin declares a
+    strict rebind contract (``strict_dataset_rebind``), in which case its
+    ``merge_update_form_data`` hook receives ``dataset_rebind=True``. Plugins
+    that declare ``owns_update_merge`` merge same-viz updates themselves;
+    every other update takes the shared overlay and then the plugin's
+    ``finalize_update_form_data`` hook.
+    """
+    from superset.mcp_service.chart.registry import plugin_for_viz_type
+
+    plugin = plugin_for_viz_type(new_form_data.get("viz_type"))
+    if dataset_rebind and not (plugin is not None and 
plugin.strict_dataset_rebind):
+        existing_form_data = scrub_dataset_bound_form_data(
+            existing_form_data,
+            target_viz_type=new_form_data.get("viz_type"),
+        )
+        dataset_rebind = False
+
+    same_viz = existing_form_data.get("viz_type") == 
new_form_data.get("viz_type")
+    if same_viz and plugin is not None and (dataset_rebind or 
plugin.owns_update_merge):
+        plugin_merged = plugin.merge_update_form_data(
+            existing_form_data,
+            new_form_data,
+            config,
+            dataset_rebind=dataset_rebind,
+        )
+        if plugin_merged is not None:
+            return plugin_merged
+    if dataset_rebind:
+        # A strict rebind never inherits saved state the plugin did not merge.
+        return dict(new_form_data)
+
+    merged = overlay_update_form_data(existing_form_data, new_form_data, 
config)
+    if plugin is not None:
+        merged = plugin.finalize_update_form_data(
+            existing_form_data, new_form_data, merged, config
+        )
+    return merged
+
+
+def overlay_update_form_data(
+    existing_form_data: Dict[str, Any],
+    new_form_data: Dict[str, Any],
+    config: Any,
+) -> Dict[str, Any]:
+    """Overlay a same-dataset update on the saved state with shared 
semantics."""
+    same_viz = existing_form_data.get("viz_type") == 
new_form_data.get("viz_type")
+    explicit_control_clears = (
+        _apply_modeled_update_semantics(existing_form_data, new_form_data, 
config)
+        if same_viz
+        else set()
+    )
+    if same_viz:
+        from superset.mcp_service.chart.registry import (
+            query_role_keys_for_viz_type,
+        )
+
+        # Strip every target-owned query role first, then overlay the mapper's
+        # complete replacement. This removes mutually exclusive aliases (for
+        # example Pie ``metrics`` vs ``metric`` and raw vs aggregate table
+        # roles) without dropping unmodeled native presentation controls.
+        query_role_keys = query_role_keys_for_viz_type(
+            str(new_form_data.get("viz_type"))
+        )
+        merged = {
+            key: value
+            for key, value in existing_form_data.items()
+            if key not in query_role_keys

Review Comment:
   On a same-viz update every key in the plugin's `query_role_keys` is dropped 
from the saved form data before the mapper output is overlaid, and `groupby` 
for XY charts is not one of the modeled controls that gets restored. A saved 
line chart grouped by `region` that receives `update_chart` with the same 
`x`/`y` and `stacked: true` but no `group_by` will have its regional series 
collapsed into one aggregate series. Is dropping the saved grouping on omission 
intended (with only an explicit `group_by: []` meant to clear it)? If so it 
seems worth calling out in UPDATING.md; otherwise should `groupby` be preserved 
when `group_by` is unset?



##########
superset/common/form_data_query_context.py:
##########
@@ -288,71 +427,1309 @@ def _pie_contribution_post_processing(metrics: 
list[Any]) -> list[dict[str, Any]
     ]
 
 
-def build_query_context_from_form_data(
-    form_data: dict[str, Any],
-    datasource: dict[str, Any],
-    viz_type: str | None = None,
+def _as_list(value: Any) -> list[Any]:
+    """Return the frontend ``ensureIsArray`` representation of a value."""
+    if value is None:
+        return []
+    return list(value) if isinstance(value, (list, tuple)) else [value]
+
+
+def _label(value: Any, *, metric: bool = False) -> str:
+    """Resolve a frontend-compatible query-field label."""
+    try:
+        return get_metric_name(value) if metric else get_column_name(value)
+    except (AttributeError, KeyError, TypeError, ValueError):
+        if isinstance(value, Mapping):
+            return str(
+                value.get("label")
+                or value.get("column_name")
+                or value.get("sqlExpression")
+                or value
+            )
+        return str(value)
+
+
+def _deduplicate_fields(values: list[Any], *, metric: bool = False) -> 
list[Any]:
+    """Deduplicate query fields by their frontend-visible label."""
+    result: list[Any] = []
+    labels: set[str] = set()
+    for value in values:
+        if value is None or value == "":
+            continue
+        label = _label(value, metric=metric)
+        if label in labels:
+            continue
+        labels.add(label)
+        result.append(value)
+    return result
+
+
+def retain_mixed_timeseries_secondary_form_data(
+    form_data: Mapping[str, Any],
 ) -> dict[str, Any]:
-    """
-    Build a query-context payload (the JSON shape 
``ChartDataQueryContextSchema``
-    loads) from a chart's form data and datasource reference.
+    """Mirror ``retainFormDataSuffix(formData, '_b')`` exactly.
 
-    :param form_data: The chart's saved ``params`` parsed to a dict.
-    :param datasource: ``{"id": <int>, "type": "table"}`` datasource reference.
-    :param viz_type: The chart's viz type, used for viz-specific handling.
-    :returns: A single-query query-context dict.
+    Suffixed values are installed first, including falsey values, and shared
+    unsuffixed controls fill only keys that query B did not explicitly set.
     """
-    columns, metrics = _columns_and_metrics(form_data, viz_type)
-
-    # SIMPLE adhoc filters (+ legacy top-level ``filters``) become query 
filters;
-    # free-form SQL predicates go into ``extras``. Only ``WHERE``-clause SIMPLE
-    # filters are applied (matching the chart), so the export never filters on 
a
-    # ``HAVING`` clause the chart itself ignores.
-    filters = adhoc_filters_to_query_filters(
-        form_data.get("adhoc_filters", []), where_only=True
-    )
-    for flt in form_data.get("filters") or []:
-        if isinstance(flt, dict) and flt.get("col") is not None:
-            filters.append(flt)
+    secondary: dict[str, Any] = {}
+    for key, value in form_data.items():
+        if key.endswith("_b"):
+            secondary[key[:-2]] = value
+    for key, value in form_data.items():
+        if not key.endswith("_b") and key not in secondary:
+            secondary[key] = value
+    secondary_filter_keys = {
+        "adhoc_filters": "adhoc_filters_b",
+        "extra_filters": "extra_filters_b",
+        "filters": "filters_b",
+        "having": "having_b",
+        "where": "where_b",
+    }
+    if any(suffixed in form_data for suffixed in 
secondary_filter_keys.values()):
+        # The frontend exposes adhoc_filters_b, while saved/server payloads can
+        # carry equivalent legacy aliases. Treat the family atomically: an
+        # explicit clear in any B alias must not be repopulated by query A's
+        # differently named filter representation.
+        for primary, suffixed in secondary_filter_keys.items():
+            if suffixed not in form_data:
+                secondary.pop(primary, None)
+    return secondary
 
-    extras = freeform_where_having(form_data)
-    if form_data.get("time_grain_sqla"):
-        extras["time_grain_sqla"] = form_data["time_grain_sqla"]
 
-    # Prefer the modern ``time_range``; fall back to the legacy 
``since``/``until``
-    # pair (older charts store the range that way) before defaulting to no 
filter.
-    time_range = form_data.get("time_range")
-    if not time_range and (form_data.get("since") or form_data.get("until")):
-        time_range = f"{form_data.get('since') or ''} : 
{form_data.get('until') or ''}"
-    time_range = time_range or "No filter"
+def _base_query_object(  # noqa: C901
+    form_data: dict[str, Any],
+    *,
+    row_limit: int | None,
+    order_desc: bool | None,
+    filters_prepared: bool,
+) -> dict[str, Any]:
+    """Build the shared frontend-equivalent portion of a QueryObject."""
+    columns, metrics, orderby = query_fields_from_form_data(form_data)
     query: dict[str, Any] = {
         "columns": columns,
         "metrics": metrics,
-        "orderby": orderby_from_form_data(form_data, metrics, viz_type),
-        "filters": filters,
-        "time_range": time_range,
     }
+    if orderby:
+        query["orderby"] = orderby
+
+    if filters_prepared:
+        query["filters"] = list(form_data.get("filters") or [])
+        for clause in ("where", "having"):
+            if form_data.get(clause):
+                query[clause] = form_data[clause]
+        if form_data.get("extras"):
+            query["extras"] = dict(form_data["extras"])
+    else:
+        filters = adhoc_filters_to_query_filters(
+            form_data.get("adhoc_filters", []), where_only=True
+        )
+        filters.extend(
+            filter_
+            for filter_ in form_data.get("filters") or []
+            if isinstance(filter_, dict) and filter_.get("col") is not None
+        )
+        query["filters"] = filters
+        if extras := freeform_where_having(form_data):
+            query["extras"] = extras
+
+    extras = dict(query.get("extras") or {})
+    if form_data.get("time_grain_sqla") is not None:
+        extras["time_grain_sqla"] = form_data["time_grain_sqla"]
     if extras:
         query["extras"] = extras
-    if viz_type == "pie" and (
-        post_processing := _pie_contribution_post_processing(metrics)
+
+    effective_limit = row_limit if row_limit is not None else 
form_data.get("row_limit")
+    if effective_limit is not None:
+        query["row_limit"] = effective_limit
+    if form_data.get("row_offset") is not None:
+        query["row_offset"] = form_data["row_offset"]
+    if order_desc is not None:
+        query["order_desc"] = order_desc
+    elif "order_desc" in form_data and form_data["order_desc"] is not None:
+        query["order_desc"] = form_data["order_desc"]
+
+    time_range = form_data.get("time_range")
+    if not time_range and (form_data.get("since") or form_data.get("until")):
+        time_range = f"{form_data.get('since') or ''} : 
{form_data.get('until') or ''}"
+    if time_range:
+        query["time_range"] = time_range
+    for key in ("since", "until", "annotation_layers", "url_params", 
"custom_params"):
+        if form_data.get(key) is not None:
+            query[key] = form_data[key]
+
+    granularity = form_data.get("granularity") or 
form_data.get("granularity_sqla")
+    if granularity:
+        query["granularity"] = granularity
+    series_limit = form_data.get("series_limit", form_data.get("limit"))
+    if series_limit is not None:
+        query["series_limit"] = series_limit
+    series_limit_metric = form_data.get("series_limit_metric")
+    if series_limit_metric is None:
+        series_limit_metric = form_data.get("timeseries_limit_metric")
+    if series_limit_metric is not None:
+        query["series_limit_metric"] = series_limit_metric
+    if form_data.get("group_others_when_limit_reached") is not None:
+        query["group_others_when_limit_reached"] = form_data[
+            "group_others_when_limit_reached"
+        ]
+    return query
+
+
+def _temporalized_columns(form_data: dict[str, Any], columns: list[Any]) -> 
list[Any]:
+    """Apply the pivot BASE_AXIS temporal-column contract."""
+    time_grain = form_data.get("time_grain_sqla")
+    temporal_lookup = form_data.get("temporal_columns_lookup") or {}
+    result: list[Any] = []
+    for column in columns:
+        if (
+            isinstance(column, str)
+            and time_grain
+            and (
+                temporal_lookup.get(column)
+                or form_data.get("granularity_sqla") == column
+            )
+        ):
+            result.append(
+                {
+                    "timeGrain": time_grain,
+                    "columnType": "BASE_AXIS",
+                    "sqlExpression": column,
+                    "label": column,
+                    "expressionType": "SQL",
+                }
+            )
+        else:
+            result.append(column)
+    return result
+
+
+def _box_temporalized_columns(
+    form_data: dict[str, Any], columns: list[Any]
+) -> list[Any]:
+    """Convert only physical columns confirmed temporal by Box Plot 
metadata."""
+    time_grain = form_data.get("time_grain_sqla")
+    temporal_lookup = form_data.get("temporal_columns_lookup")
+    if not time_grain or not isinstance(temporal_lookup, Mapping):
+        return columns
+    return [
+        {
+            "timeGrain": time_grain,
+            "columnType": "BASE_AXIS",
+            "sqlExpression": column,
+            "label": column,
+            "expressionType": "SQL",
+        }
+        if isinstance(column, str) and temporal_lookup.get(column) is True
+        else column
+        for column in columns
+    ]
+
+
+def _table_temporalized_columns(
+    form_data: dict[str, Any], columns: list[Any]
+) -> list[Any]:
+    """Promote the first temporal table group-by to the frontend BASE_AXIS.
+
+    Table's builder treats only physical columns named in
+    ``temporal_columns_lookup`` as temporal and moves the first match to the
+    front.  Later temporal dimensions remain ordinary group-bys.
+    """
+    time_grain = form_data.get("time_grain_sqla")
+    temporal_lookup = form_data.get("temporal_columns_lookup") or {}
+    if not time_grain or not isinstance(temporal_lookup, Mapping):
+        return columns
+
+    temporal_column: dict[str, Any] | None = None
+    remaining: list[Any] = []
+    for column in columns:
+        if (
+            temporal_column is None
+            and isinstance(column, str)
+            and temporal_lookup.get(column)
+        ):
+            temporal_column = {
+                "timeGrain": time_grain,
+                "columnType": "BASE_AXIS",
+                "sqlExpression": column,
+                "label": column,
+                "expressionType": "SQL",
+                "isColumnReference": True,
+            }
+        else:
+            remaining.append(column)
+    return [temporal_column, *remaining] if temporal_column else columns
+
+
+def _histogram_query(form_data: dict[str, Any], query: dict[str, Any]) -> None:
+    groupby = _as_list(form_data.get("groupby"))
+    column = form_data.get("column")
+    query["columns"] = [*groupby, *([column] if column is not None else [])]
+    query["post_processing"] = [
+        {
+            "operation": "histogram",
+            "options": {
+                "column": _label(column),
+                "groupby": [_label(value) for value in groupby],
+                "bins": int(form_data.get("bins", 5)),
+                "cumulative": form_data.get("cumulative", False),
+                "normalize": form_data.get("normalize", False),
+            },
+        }
+    ]
+    if any(
+        isinstance(filter_, dict) and filter_.get("clause") == "HAVING"
+        for filter_ in form_data.get("adhoc_filters") or []
+    ):
+        query["metrics"] = [
+            {
+                "expressionType": "SQL",
+                "sqlExpression": "COUNT(*)",
+                "label": "COUNT(*)",
+            }
+        ]
+    else:
+        query["metrics"] = []
+
+
+def _box_plot_query(form_data: dict[str, Any], query: dict[str, Any]) -> None:
+    distributed = _as_list(form_data.get("columns"))
+    if not distributed and form_data.get("granularity_sqla"):
+        distributed = [form_data["granularity_sqla"]]
+    groupby = _as_list(form_data.get("groupby"))
+    query["columns"] = [*_box_temporalized_columns(form_data, distributed), 
*groupby]
+    query["series_columns"] = groupby
+    whisker = form_data.get("whiskerOptions")
+    if not whisker:
+        query["post_processing"] = []
+        return
+    whisker_type = "tukey"
+    percentiles: list[int] | None = None
+    if whisker == "Min/max (no outliers)":
+        whisker_type = "min/max"
+    elif isinstance(whisker, str) and whisker.endswith(" percentiles"):
+        low, high = whisker.removesuffix(" percentiles").split("/", 1)
+        whisker_type = "percentile"
+        percentiles = [int(low), int(high)]
+    query["post_processing"] = [
+        {
+            "operation": "boxplot",
+            "options": {
+                "whisker_type": whisker_type,
+                "percentiles": percentiles,
+                "groupby": [_label(value) for value in groupby],
+                "metrics": [_label(value, metric=True) for value in 
query["metrics"]],
+            },
+        }
+    ]
+
+
+_PIVOT_ADDITIVE_AGGREGATES = frozenset({"SUM", "COUNT", "MIN", "MAX"})
+
+
+def _all_metrics_additive(metrics: list[Any]) -> bool:
+    """Mirror Pivot's conservative additive-metric fast-path."""
+    return bool(metrics) and all(
+        isinstance(metric, Mapping)
+        and metric.get("expressionType") == "SIMPLE"
+        and metric.get("aggregate") in _PIVOT_ADDITIVE_AGGREGATES
+        for metric in metrics
+    )
+
+
+def _pivot_grouping_sets(
+    form_data: dict[str, Any], rows: list[Any], columns: list[Any]
+) -> list[list[str]]:
+    """Enumerate the rollup levels requested by Pivot's frontend builder."""
+    row_prefixes = [[], *(rows[: index + 1] for index in range(len(rows)))]
+    column_prefixes = [
+        [],
+        *(columns[: index + 1] for index in range(len(columns))),
+    ]
+    show_values_as = form_data.get("showValuesAs")
+    needs_rows_collapsed = show_values_as in {"percent_col", "percent_total"}
+    needs_columns_collapsed = show_values_as in {"percent_row", 
"percent_total"}
+
+    def row_prefix_needed(prefix: list[Any]) -> bool:
+        if len(prefix) == len(rows):
+            return True
+        if not prefix:
+            return bool(form_data.get("colTotals")) or needs_rows_collapsed
+        return bool(form_data.get("rowSubTotals"))
+
+    def column_prefix_needed(prefix: list[Any]) -> bool:
+        if len(prefix) == len(columns):
+            return True
+        if not prefix:
+            return bool(form_data.get("rowTotals")) or needs_columns_collapsed
+        return bool(form_data.get("colSubTotals"))
+
+    levels = [
+        (row_prefix, column_prefix)
+        for row_prefix in row_prefixes
+        if row_prefix_needed(row_prefix)
+        for column_prefix in column_prefixes
+        if column_prefix_needed(column_prefix)
+    ]
+    if form_data.get("combineMetric"):
+        metrics_layout = form_data.get("metricsLayout")
+
+        def forced_denominator(level: tuple[list[Any], list[Any]]) -> bool:
+            row_prefix, column_prefix = level
+            return (needs_rows_collapsed and not row_prefix) or (
+                needs_columns_collapsed and not column_prefix
+            )
+
+        if metrics_layout == "ROWS":
+            levels = [
+                level
+                for level in levels
+                if len(level[0]) == len(rows) or forced_denominator(level)
+            ]
+        else:
+            levels = [
+                level
+                for level in levels
+                if len(level[1]) == len(columns) or forced_denominator(level)
+            ]
+
+    return [
+        [_label(value) for value in _deduplicate_fields([*row_prefix, 
*column_prefix])]
+        for row_prefix, column_prefix in levels
+    ]
+
+
+def _pivot_query(form_data: dict[str, Any], query: dict[str, Any]) -> None:
+    rows = _as_list(form_data.get("groupbyRows"))
+    columns = _as_list(form_data.get("groupbyColumns"))
+    if form_data.get("transposePivot"):
+        rows, columns = columns, rows
+    query["columns"] = _temporalized_columns(
+        form_data, _deduplicate_fields([*rows, *columns])
+    )
+    metric = query.get("series_limit_metric") or next(
+        iter(query.get("metrics") or []), None
+    )
+    query["orderby"] = (
+        [[metric, not bool(query.get("order_desc", True))]]
+        if metric is not None
+        else []
+    )
+    if not _all_metrics_additive(query.get("metrics") or []):
+        query["grouping_sets"] = _pivot_grouping_sets(form_data, rows, columns)
+
+
+def _waterfall_query(form_data: dict[str, Any], query: dict[str, Any]) -> None:
+    x_axis = form_data.get("x_axis") or form_data.get("granularity_sqla")
+    columns = [*_as_list(x_axis), *_as_list(form_data.get("groupby"))]
+    query["columns"] = _deduplicate_fields(columns)
+    query["orderby"] = [[column, True] for column in query["columns"]]
+
+
+def _gantt_query(form_data: dict[str, Any], query: dict[str, Any]) -> None:
+    groupby = _as_list(form_data.get("series"))
+    orderby = query_fields_from_form_data(form_data)[2]
+    columns = [
+        form_data.get("start_time"),
+        form_data.get("end_time"),
+        form_data.get("y_axis"),
+        *groupby,
+        *_as_list(form_data.get("tooltip_columns")),
+        *(entry[0] for entry in orderby if entry),
+    ]
+    query["columns"] = _deduplicate_fields(columns)
+    query["metrics"] = _as_list(form_data.get("tooltip_metrics"))
+    query["orderby"] = orderby
+    query["series_columns"] = groupby
+
+
+def _normalize_query_orderby(query: dict[str, Any]) -> None:
+    """Mirror ``normalizeOrderBy`` while retaining limit-direction controls."""
+    orderby = query.get("orderby")
+    if (
+        isinstance(orderby, list)
+        and orderby
+        and isinstance(orderby[0], (list, tuple))
+        and len(orderby[0]) == 2
+        and orderby[0][0]
+        and isinstance(orderby[0][1], bool)
+    ):
+        return
+    metric = (
+        query.get("series_limit_metric")
+        or query.get("legacy_order_by")
+        or next(iter(query.get("metrics") or []), None)
+    )
+    if metric is None:
+        query.pop("orderby", None)
+        return
+    query["orderby"] = [[metric, not bool(query.get("order_desc", True))]]
+
+
+_TIME_COMPARISON_TYPES = frozenset({"values", "difference", "percentage", 
"ratio"})
+
+
+def _metric_offset_map(
+    form_data: dict[str, Any],
+    metric_labels: list[str],
+    offsets: list[Any] | None = None,
+) -> dict[str, str]:
+    """Return the frontend time-comparison metric label map."""
+    if form_data.get("comparison_type") not in _TIME_COMPARISON_TYPES:
+        return {}
+    return {
+        f"{metric}__{offset}": metric
+        for metric in metric_labels
+        for offset in (
+            offsets if offsets is not None else 
_as_list(form_data.get("time_compare"))
+        )
+    }
+
+
+def _table_time_offsets(form_data: dict[str, Any]) -> list[Any]:
+    """Resolve Table custom/inherited shifts like its frontend query 
adapter."""
+    raw_offsets = _as_list(form_data.get("time_compare"))
+    offsets = [offset for offset in raw_offsets if offset not in {"custom", 
"inherit"}]
+    if "custom" in raw_offsets and form_data.get("start_date_offset") is not 
None:
+        offsets.append(form_data["start_date_offset"])
+    extra_form_data = form_data.get("extra_form_data")
+    if isinstance(extra_form_data, Mapping) and 
extra_form_data.get("time_compare"):
+        inherited = extra_form_data["time_compare"]
+        if inherited not in offsets:
+            offsets = [inherited]
+    return offsets
+
+
+def _x_axis_column(form_data: Mapping[str, Any]) -> Any | None:
+    """Return a supported x-axis column, excluding legacy granularity.
+
+    ``column_name`` mappings are retained for old server/native payloads. Big
+    Number uses the stricter frontend predicate below.
+    """
+    x_axis = form_data.get("x_axis")
+    if isinstance(x_axis, str):
+        return x_axis if x_axis else None
+    if isinstance(x_axis, Mapping):
+        if isinstance(column_name := x_axis.get("column_name"), str) and 
column_name:
+            return column_name
+        # Frontend SQL adhoc columns remain objects in the QueryObject.
+        return x_axis if x_axis else None
+    return None
+
+
+def _frontend_x_axis_column(form_data: Mapping[str, Any]) -> Any | None:
+    """Mirror ``isQueryFormColumn`` for physical and SQL adhoc columns."""
+    x_axis = form_data.get("x_axis")
+    if isinstance(x_axis, str):
+        return x_axis if x_axis else None
+    if (
+        isinstance(x_axis, Mapping)
+        and "sqlExpression" in x_axis
+        and "label" in x_axis
+        and x_axis.get("expressionType") in {None, "SQL"}
+    ):
+        return x_axis
+    return None
+
+
+def normalize_time_column(
+    form_data: Mapping[str, Any], query: dict[str, Any]
+) -> dict[str, Any]:
+    """Apply the final shared frontend ``normalizeTimeColumn`` mutator."""
+    x_axis = _frontend_x_axis_column(form_data)
+    columns = query.get("columns")
+    if x_axis is None or not isinstance(columns, list):
+        return query
+
+    axis_index: int | None = None
+    for index, column in enumerate(columns):
+        if isinstance(x_axis, str) and isinstance(column, str) and column == 
x_axis:
+            axis_index = index
+            break
+        if (
+            isinstance(x_axis, Mapping)
+            and isinstance(column, Mapping)
+            and column.get("sqlExpression") == x_axis.get("sqlExpression")
+        ):
+            axis_index = index
+            break
+    if axis_index is None:
+        return query
+
+    normalized = dict(query)
+    normalized_columns = list(columns)
+    grain = (query.get("extras") or {}).get("time_grain_sqla")
+    if isinstance(columns[axis_index], Mapping):
+        normalized_axis = {
+            "columnType": "BASE_AXIS",
+            **({"timeGrain": grain} if grain is not None else {}),
+            **columns[axis_index],
+        }
+    else:
+        normalized_axis = {
+            "columnType": "BASE_AXIS",
+            "sqlExpression": x_axis,
+            "label": x_axis,
+            "expressionType": "SQL",
+            "isColumnReference": True,
+            **({"timeGrain": grain} if grain is not None else {}),
+        }
+    normalized_columns[axis_index] = normalized_axis
+    normalized["columns"] = normalized_columns
+    normalized.pop("is_timeseries", None)
+    return normalized
+
+
+def _finalize_query_objects(
+    form_data: Mapping[str, Any], queries: list[dict[str, Any]]
+) -> list[dict[str, Any]]:
+    """Run shared query-context mutators after every visualization adapter."""
+    return [normalize_time_column(form_data, query) for query in queries]
+
+
+def _x_axis_label(
+    form_data: Mapping[str, Any], *, frontend_strict: bool = False
+) -> str | None:
+    """Mirror getXAxisColumn/getXAxisLabel for explicit and legacy axes."""
+    explicit = (
+        _frontend_x_axis_column(form_data)
+        if frontend_strict
+        else _x_axis_column(form_data)
+    )
+    if explicit:
+        return _label(explicit)
+    if form_data.get("granularity_sqla"):
+        return DTTM_ALIAS
+    return None
+
+
+def _rename_operator(
+    form_data: dict[str, Any],
+    query: dict[str, Any],
+    *,
+    x_axis_label: str | None,
+) -> dict[str, Any] | None:
+    """Mirror the ECharts ``renameOperator`` for Timeseries and Mixed 
charts."""
+    metrics = list(query.get("metrics") or [])
+    metric_labels = [_label(metric, metric=True) for metric in metrics]
+    series_columns = query.get("series_columns")
+    columns = _as_list(
+        series_columns if series_columns is not None else query.get("columns")
+    )
+    time_offsets = _as_list(form_data.get("time_compare"))
+    offset_map = _metric_offset_map(form_data, metric_labels)
+    is_time_comparison = bool(offset_map)
+    truncate_metric = form_data.get("truncate_metric")
+
+    should_rename = (
+        bool(metrics)
+        and bool(x_axis_label)
+        and (
+            is_time_comparison
+            or (
+                (bool(columns) or len(time_offsets) > 1)
+                and "truncate_metric" in form_data
+                and bool(truncate_metric)
+            )
+        )
+    )
+    if not should_rename:
+        return None
+
+    renamed: dict[str, str | None] = {}
+    comparison_type = form_data.get("comparison_type")
+    if is_time_comparison:
+        for metric_with_offset, metric_only in offset_map.items():
+            offset_label = next(
+                (
+                    str(offset)
+                    for offset in time_offsets
+                    if metric_with_offset.endswith(f"__{offset}")
+                ),
+                None,
+            )
+            source = (
+                metric_with_offset
+                if comparison_type == "values"
+                else f"{comparison_type}__{metric_only}__{metric_with_offset}"
+            )
+            renamed[source] = (
+                f"{metric_only}, {offset_label}" if len(metrics) > 1 else 
offset_label
+            )
+
+    if (
+        comparison_type not in {"difference", "percentage", "ratio"}
+        and len(metrics) == 1
+        and not renamed
     ):
+        renamed[metric_labels[0]] = None
+    if not renamed:
+        return None
+    return {
+        "operation": "rename",
+        "options": {"columns": renamed, "level": 0, "inplace": True},
+    }
+
+
+def _timeseries_post_processing(  # noqa: C901
+    form_data: dict[str, Any],
+    query: dict[str, Any],
+    *,
+    x_axis_label: str | None,
+    groupby: list[Any],
+    mixed: bool,
+    sort_metric: Any = None,
+) -> tuple[list[dict[str, Any]], list[Any]]:
+    """Build the Timeseries/Mixed operator pipeline in frontend order."""
+    metric_labels = [_label(value, metric=True) for value in 
query.get("metrics") or []]
+    sort_metric_label = (
+        _label(sort_metric, metric=True) if sort_metric is not None else None
+    )
+    offset_map = _metric_offset_map(form_data, metric_labels)
+    time_offsets = _as_list(form_data.get("time_compare")) if offset_map else 
[]
+    post_processing: list[dict[str, Any]] = []
+
+    if x_axis_label and metric_labels:
+        aggregate_labels = (
+            [*offset_map.values(), *offset_map] if offset_map else 
list(metric_labels)
+        )
+        if not offset_map and sort_metric_label is not None:
+            aggregate_labels.append(sort_metric_label)
+        post_processing.append(
+            {
+                "operation": "pivot",
+                "options": {
+                    "index": [x_axis_label],
+                    "columns": [_label(value) for value in groupby],
+                    "aggregates": {
+                        label: {"operator": "mean"} for label in 
aggregate_labels
+                    },
+                    "drop_missing_columns": not form_data.get(
+                        "show_empty_columns", False
+                    ),
+                },
+            }
+        )
+
+    if form_data.get("resample_method") and form_data.get("resample_rule"):
+        zero_fill = form_data["resample_method"] == "zerofill"
+        post_processing.append(
+            {
+                "operation": "resample",
+                "options": {
+                    "method": "asfreq" if zero_fill else 
form_data["resample_method"],
+                    "rule": form_data["resample_rule"],
+                    "fill_value": 0 if zero_fill else None,
+                    **(
+                        {"fill_time_range": True}
+                        if form_data.get("resample_fill_time_range")
+                        else {}
+                    ),
+                },
+            }
+        )
+
+    rolling_labels = (
+        [*offset_map.values(), *offset_map] if offset_map else metric_labels
+    )
+    columns_map = {label: label for label in rolling_labels}
+    rolling_type = form_data.get("rolling_type")
+    if rolling_type == "cumsum":
+        post_processing.append(
+            {
+                "operation": "cum",
+                "options": {"operator": "sum", "columns": columns_map},
+            }
+        )
+    elif rolling_type in {"sum", "mean", "std"}:
+        post_processing.append(
+            {
+                "operation": "rolling",
+                "options": {
+                    "rolling_type": rolling_type,
+                    "window": int(form_data.get("rolling_periods") or 1),
+                    "min_periods": int(form_data.get("min_periods") or 0),
+                    "columns": columns_map,
+                },
+            }
+        )
+
+    comparison_type = form_data.get("comparison_type")
+    if offset_map and comparison_type != "values":
+        post_processing.append(
+            {
+                "operation": "compare",
+                "options": {
+                    "source_columns": list(offset_map.values()),
+                    "compare_columns": list(offset_map),
+                    "compare_type": comparison_type,
+                    "drop_original_columns": True,
+                },
+            }
+        )
+
+    if not mixed and form_data.get("contributionMode"):
+        post_processing.append(
+            {
+                "operation": "contribution",
+                "options": {
+                    "orientation": form_data["contributionMode"],
+                    "time_shifts": time_offsets,
+                },
+            }
+        )
+
+    if rename := _rename_operator(form_data, query, x_axis_label=x_axis_label):
+        post_processing.append(rename)
+
+    if not mixed:
+        sortable = {
+            x_axis_label or "",
+            *metric_labels,
+            sort_metric_label or "",
+        }
+        if (
+            "x_axis_sort" in form_data
+            and "x_axis_sort_asc" in form_data
+            and form_data.get("x_axis_sort") in sortable
+            and not groupby
+        ):
+            options: dict[str, Any] = {"ascending": 
form_data.get("x_axis_sort_asc")}
+            if form_data.get("x_axis_sort") == x_axis_label:
+                options["is_sort_index"] = True
+            else:
+                options["by"] = form_data.get("x_axis_sort")
+            post_processing.append({"operation": "sort", "options": options})
+
+    post_processing.append({"operation": "flatten"})
+    if not mixed and form_data.get("forecastEnabled") and x_axis_label:
+        x_axis = _x_axis_column(form_data)
+        axis_grain = x_axis.get("timeGrain") if isinstance(x_axis, Mapping) 
else None
+        time_grain = (
+            axis_grain
+            or (query.get("extras") or {}).get("time_grain_sqla")
+            or form_data.get("time_grain_sqla")
+            or "P1D"
+        )
+        post_processing.append(
+            {
+                "operation": "prophet",
+                "options": {
+                    "time_grain": time_grain,
+                    "periods": int(form_data.get("forecastPeriods") or 0),
+                    "confidence_interval": float(
+                        form_data.get("forecastInterval") or 0
+                    ),
+                    "yearly_seasonality": 
form_data.get("forecastSeasonalityYearly"),
+                    "weekly_seasonality": 
form_data.get("forecastSeasonalityWeekly"),
+                    "daily_seasonality": 
form_data.get("forecastSeasonalityDaily"),
+                    "index": x_axis_label,
+                },
+            }
+        )
+    return post_processing, time_offsets
+
+
+def _timeseries_query(form_data: dict[str, Any], query: dict[str, Any]) -> 
None:
+    groupby = _as_list(form_data.get("groupby"))
+    x_axis = _x_axis_column(form_data)
+    x_axis_label = _x_axis_label(form_data)
+    query["columns"] = _deduplicate_fields([*_as_list(x_axis), *groupby])
+    query["series_columns"] = groupby
+    if not x_axis:
+        query["is_timeseries"] = True
+
+    # Timeseries includes its sort-only metric in the SELECT when no series is
+    # present. This lets the post-processing sort operator use a metric not
+    # otherwise displayed.
+    sort_metric = form_data.get("timeseries_limit_metric")
+    if isinstance(sort_metric, list):
+        sort_metric = next(iter(sort_metric), None)
+    if (
+        not groupby
+        and sort_metric is not None
+        and _label(sort_metric, metric=True) == form_data.get("x_axis_sort")
+        and _label(sort_metric, metric=True)
+        not in {_label(metric, metric=True) for metric in query.get("metrics") 
or []}
+    ):
+        extra_metric = sort_metric
+    else:
+        extra_metric = None
+    _normalize_query_orderby(query)
+    post_processing, time_offsets = _timeseries_post_processing(
+        form_data,
+        query,
+        x_axis_label=x_axis_label,
+        groupby=groupby,
+        mixed=form_data.get("viz_type") == "mixed_timeseries",
+        sort_metric=extra_metric,
+    )
+    if extra_metric is not None:
+        query.setdefault("metrics", []).append(extra_metric)
+    query["post_processing"] = post_processing
+    query["time_offsets"] = time_offsets
+    if form_data.get("viz_type") != "mixed_timeseries":
+        query["time_compare_full_range"] = bool(
+            time_offsets and form_data.get("time_compare_full_range")
+        )
+
+
+def _big_number_queries(
+    form_data: dict[str, Any], query: dict[str, Any]
+) -> list[dict[str, Any]]:
+    """Mirror Big Number with Trendline's one/two-query contract."""
+    # Saved/native Big Number payloads can carry the temporal binding as a
+    # ``{"column_name": ...}`` mapping, which the strict frontend predicate 
does
+    # not recognize; keep grouping by it rather than falling back to a total.
+    frontend_x_axis = _frontend_x_axis_column(form_data)
+    explicit_x_axis = frontend_x_axis or _x_axis_column(form_data)
+    time_column = _as_list(explicit_x_axis)
+    x_axis_label = (
+        _label(explicit_x_axis)
+        if explicit_x_axis
+        else _x_axis_label(form_data, frontend_strict=True)
+    )
+    query["columns"] = time_column
+    if time_column and frontend_x_axis is None:
+        # A native ``{"column_name": ...}`` axis groups by its temporal column
+        # but is not rewritten by normalize_time_column, so drop the legacy
+        # granularity binding here rather than bucketing the same dimension
+        # twice.
+        query.pop("granularity", None)
+        extras = query.get("extras")
+        if isinstance(extras, dict):
+            extras.pop("time_grain_sqla", None)
+            if not extras:
+                query.pop("extras", None)
+    elif not time_column:
+        query["is_timeseries"] = True
+    metric_labels = [_label(value, metric=True) for value in 
query.get("metrics") or []]
+    post_processing: list[dict[str, Any]] = []
+    if x_axis_label and metric_labels:
+        post_processing.append(
+            {
+                "operation": "pivot",
+                "options": {
+                    "index": [x_axis_label],
+                    "columns": [],
+                    "aggregates": {
+                        label: {"operator": "mean"} for label in metric_labels
+                    },
+                    "drop_missing_columns": not form_data.get(
+                        "show_empty_columns", False
+                    ),
+                },
+            }
+        )
+    if form_data.get("resample_method") and form_data.get("resample_rule"):
+        zero_fill = form_data["resample_method"] == "zerofill"
+        post_processing.append(
+            {
+                "operation": "resample",
+                "options": {
+                    "method": "asfreq" if zero_fill else 
form_data["resample_method"],
+                    "rule": form_data["resample_rule"],
+                    "fill_value": 0 if zero_fill else None,
+                    **(
+                        {"fill_time_range": True}
+                        if form_data.get("resample_fill_time_range")
+                        else {}
+                    ),
+                },
+            }
+        )
+    rolling_type = form_data.get("rolling_type")
+    columns_map = {label: label for label in metric_labels}
+    if rolling_type == "cumsum":
+        post_processing.append(
+            {"operation": "cum", "options": {"operator": "sum", "columns": 
columns_map}}
+        )
+    elif rolling_type in {"sum", "mean", "std"}:
+        post_processing.append(
+            {
+                "operation": "rolling",
+                "options": {
+                    "rolling_type": rolling_type,
+                    "window": int(form_data.get("rolling_periods") or 1),
+                    "min_periods": int(form_data.get("min_periods") or 0),
+                    "columns": columns_map,
+                },
+            }
+        )
+    post_processing.append({"operation": "flatten"})
+    query["post_processing"] = post_processing
+    queries = [query]
+    if form_data.get("aggregation") == "raw":
+        overall = dict(query)
+        overall.update(
+            {
+                "columns": [],
+                "is_timeseries": False,
+                "post_processing": [],
+            }
+        )
+        queries.append(overall)
+    return queries
+
+
+def _table_queries(  # noqa: C901
+    form_data: dict[str, Any], query: dict[str, Any]
+) -> list[dict[str, Any]]:
+    if is_raw_query_mode(form_data):
+        # The extractor already applies the raw-mode contract, including native
+        # ``order_by_cols`` parsing. Do not synthesize metric ordering.
+        query["columns"] = list(
+            form_data.get("all_columns") or form_data.get("columns") or []
+        )
+        query["metrics"] = []
+        if raw_orderby := orderby_from_form_data(form_data, [], "table"):
+            query["orderby"] = raw_orderby
+        else:
+            query.pop("orderby", None)
+        return [query]
+
+    metrics = list(query.get("metrics") or [])
+    query["columns"] = _table_temporalized_columns(
+        form_data, list(query.get("columns") or [])
+    )
+    percent_metrics = _as_list(form_data.get("percent_metrics"))
+    for metric in percent_metrics:
+        if _label(metric, metric=True) not in {
+            _label(existing, metric=True) for existing in metrics
+        }:
+            metrics.append(metric)
+    query["metrics"] = metrics
+    query["orderby"] = orderby_from_form_data(form_data, metrics, "table")
+    post_processing: list[dict[str, Any]] = []
+    resolved_offsets = _table_time_offsets(form_data)
+    comparison_enabled = (
+        form_data.get("comparison_type") in _TIME_COMPARISON_TYPES
+        and bool(metrics)
+        and bool(_as_list(form_data.get("time_compare")))
+    )
+    contribution: dict[str, Any] | None = None
+    if percent_metrics:
+        base_labels = [_label(metric, metric=True) for metric in 
percent_metrics]
+        labels = [
+            label
+            for metric_label in base_labels
+            for label in (
+                [
+                    metric_label,
+                    *(f"{metric_label}__{offset}" for offset in 
resolved_offsets),
+                ]
+                if comparison_enabled
+                else [metric_label]
+            )
+        ]
+        labels = list(dict.fromkeys(labels))
+        contribution = {
+            "operation": "contribution",
+            "options": {
+                "columns": labels,
+                "rename_columns": [f"%{label}" for label in labels],
+            },
+        }
+        post_processing.append(contribution)
+
+    metric_labels = [_label(metric, metric=True) for metric in metrics]
+    offset_map = _metric_offset_map(form_data, metric_labels, resolved_offsets)
+    time_offsets = resolved_offsets if offset_map else []
+    if offset_map and form_data.get("comparison_type") != "values":
+        post_processing.append(
+            {
+                "operation": "compare",
+                "options": {
+                    "source_columns": list(offset_map.values()),
+                    "compare_columns": list(offset_map),
+                    "compare_type": form_data.get("comparison_type"),
+                    "drop_original_columns": True,
+                },
+            }
+        )
+    if post_processing:
         query["post_processing"] = post_processing
-    # ``granularity`` does two jobs downstream: it names the temporal column 
the
-    # time range filters on, and it is the column ``time_grain_sqla`` buckets
-    # (``models/helpers.py`` swaps a selected column for its timestamp 
expression
-    # when that column equals ``granularity``). Only the first job depends on
-    # there being an active range, so set it whenever form data carries one —
-    # matching ``extractExtras.ts``, which sets it unconditionally. Gating it 
on
-    # ``time_range`` dropped the bucketing, so an ordinary "all-time totals by
-    # month" chart exported one row per raw timestamp instead of one per month.
-    if granularity := form_data.get("granularity") or 
form_data.get("granularity_sqla"):
+    else:
+        query.pop("post_processing", None)
+    query["time_offsets"] = time_offsets
+
+    is_download = form_data.get("result_format") in {"csv", "xlsx"} or (
+        form_data.get("result_format") == "json"
+        and form_data.get("result_type") == "results"
+    )
+    if is_download:
+        if form_data.get("row_limit") is not None:
+            query["row_limit"] = int(form_data["row_limit"])
+        query["row_offset"] = 0
+    elif form_data.get("server_pagination"):
+        page_size = int(form_data.get("server_page_length") or 0)
+        configured_limit = int(form_data.get("row_limit") or 0)
+        query["row_limit"] = (
+            min(page_size, configured_limit) if configured_limit else page_size

Review Comment:
   The preserved native pagination overrides the explicit compile/preview row 
cap here. With a saved Table that has `server_pagination=true` and 
`server_page_length=0`, a requested `row_limit` of 2 gives `min(0, 2)` = 0, so 
`QueryObjectFactory` falls back to the deployment default row limit and the 
two-row compile sample becomes a full-sized query. Should the explicit caller 
limit win when the page length is 0 (e.g. only apply the `min` when `page_size` 
is positive)?



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