feat(grid): distinguish blank and null filters

Closes #5006

apps/desktop/src/lib/__tests__/dataGrid/columnFormatter.spec.ts

@@ -36,6 +36,19 @@ describe("normalizeColumnFormatter", () => {
     expect(normalizeColumnFormatter({ ...base, filter: { column: "dict_type", mode: "between", value: "A" } })).toBeUndefined();
     expect(normalizeColumnFormatter({ ...base, filter: { column: "dict_type", mode: "raw-sql", value: "1=1" } })).toBeUndefined();
   });
+
+  it.each(["is-blank", "is-not-blank"] as const)("preserves the value-less %s manual reference filter", (mode) => {
+    expect(
+      normalizeColumnFormatter({
+        kind: "foreign-key-display",
+        referenceMode: "manual",
+        refTable: "dictionary",
+        refColumn: "dict_key",
+        displayColumn: "dict_value",
+        filter: { column: "dict_type", mode },
+      }),
+    ).toMatchObject({ filter: { column: "dict_type", mode, value: undefined, endValue: undefined } });
+  });
 });
 
 describe("normalizeSupportedDateTimePattern", () => {

apps/desktop/src/lib/__tests__/dataGrid/dataGridColumnFilter.victoriametrics.spec.ts

@@ -4,7 +4,7 @@ import type { DataGridContextFilterMode } from "@/lib/dataGrid/dataGridSql";
 
 describe("VictoriaMetrics data grid filters", () => {
   it("does not expose SQL filter modes for MetricsQL results", () => {
-    const modes: DataGridContextFilterMode[] = ["equals", "not-equals", "is-null", "is-not-null", "like", "not-like", "less-than", "greater-than", "in", "not-in", "between", "not-between"];
+    const modes: DataGridContextFilterMode[] = ["equals", "not-equals", "is-null", "is-not-null", "is-blank", "is-not-blank", "like", "not-like", "less-than", "greater-than", "in", "not-in", "between", "not-between"];
 
     expect(modes.every((mode) => !filterModeIsSupportedForDatabase(mode, "victoriametrics"))).toBe(true);
     expect(filterModeIsSupportedForDatabase("equals", "postgres")).toBe(true);

apps/desktop/src/lib/dataGrid/columnFormatter.ts

@@ -190,7 +190,7 @@ export function normalizeColumnFormatter(value: unknown): ColumnFormatterConfig
   return undefined;
 }
 
-const FOREIGN_KEY_DISPLAY_FILTER_MODES = new Set<DataGridContextFilterMode>(["equals", "not-equals", "is-null", "is-not-null", "like", "not-like", "less-than", "less-than-or-equal", "greater-than", "greater-than-or-equal", "in", "not-in", "between", "not-between"]);
+const FOREIGN_KEY_DISPLAY_FILTER_MODES = new Set<DataGridContextFilterMode>(["equals", "not-equals", "is-null", "is-not-null", "is-blank", "is-not-blank", "like", "not-like", "less-than", "less-than-or-equal", "greater-than", "greater-than-or-equal", "in", "not-in", "between", "not-between"]);
 
 function normalizeForeignKeyDisplayFilter(value: unknown): ForeignKeyDisplayFilterConfig | undefined {
   if (!value || typeof value !== "object") return undefined;
@@ -200,7 +200,7 @@ function normalizeForeignKeyDisplayFilter(value: unknown): ForeignKeyDisplayFilt
   const mode = filter.mode as DataGridContextFilterMode;
   const rawValue = typeof filter.value === "string" ? filter.value.trim() : "";
   const rawEndValue = typeof filter.endValue === "string" ? filter.endValue.trim() : "";
-  if (mode !== "is-null" && mode !== "is-not-null" && !rawValue) return undefined;
+  if (mode !== "is-null" && mode !== "is-not-null" && mode !== "is-blank" && mode !== "is-not-blank" && !rawValue) return undefined;
   if ((mode === "between" || mode === "not-between") && !rawEndValue) return undefined;
   return {
     column: filter.column.trim(),

apps/desktop/src/lib/dataGrid/dataGridColumnFilter.ts

@@ -172,7 +172,7 @@ export function combineWhereInputs(manualWhereInput?: string, structuredWhereInp
 }
 
 export function filterModeNeedsValue(mode: DataGridContextFilterMode): boolean {
-  return mode !== "is-null" && mode !== "is-not-null";
+  return mode !== "is-null" && mode !== "is-not-null" && mode !== "is-blank" && mode !== "is-not-blank";
 }
 
 export function filterModeUsesList(mode: DataGridContextFilterMode): boolean {

apps/desktop/src/lib/dataGrid/dataGridSql.ts

@@ -58,7 +58,7 @@ export interface DataGridCopyInsertStatementOptions {
   insertMode?: DataGridCopyInsertMode;
 }
 
-export type DataGridContextFilterMode = "equals" | "not-equals" | "is-null" | "is-not-null" | "like" | "not-like" | "less-than" | "less-than-or-equal" | "greater-than" | "greater-than-or-equal" | "in" | "not-in" | "between" | "not-between";
+export type DataGridContextFilterMode = "equals" | "not-equals" | "is-null" | "is-not-null" | "is-blank" | "is-not-blank" | "like" | "not-like" | "less-than" | "less-than-or-equal" | "greater-than" | "greater-than-or-equal" | "in" | "not-in" | "between" | "not-between";
 
 export interface DataGridContextFilterConditionOptions {
   databaseType?: DatabaseType;