fix(completion): include PostgreSQL function parameters

apps/desktop/src/components/editor/QueryEditor.vue

@@ -3187,9 +3187,9 @@ function isTableNameCompletionContext(completionContext: ReturnType<typeof getSq
 
 function mergeCompletionObjects(existing: SqlCompletionObject[], incoming: SqlCompletionObject[]) {
   const merged = [...existing];
-  const indexes = new Map(existing.map((object, index) => [`${object.type}:${object.schema ?? ""}:${object.name}:${object.parentName ?? ""}`.toLowerCase(), index]));
+  const indexes = new Map(existing.map((object, index) => [completionObjectIdentityKey(object), index]));
   for (const object of incoming) {
-    const key = `${object.type}:${object.schema ?? ""}:${object.name}:${object.parentName ?? ""}`.toLowerCase();
+    const key = completionObjectIdentityKey(object);
     const index = indexes.get(key);
     if (index == null) {
       indexes.set(key, merged.length);
@@ -3201,6 +3201,10 @@ function mergeCompletionObjects(existing: SqlCompletionObject[], incoming: SqlCo
   return merged;
 }
 
+function completionObjectIdentityKey(object: SqlCompletionObject): string {
+  return `${object.type}:${object.schema ?? ""}:${object.name}:${object.parentName ?? ""}:${object.signature?.trim() ?? ""}`.toLowerCase();
+}
+
 function completionObjectsDiffer(existing: SqlCompletionObject[], incoming: SqlCompletionObject[]): boolean {
   if (existing.length !== incoming.length) return true;
   return existing.some((object, index) => {

apps/desktop/src/lib/sql/sqlCompletion.ts

@@ -3024,17 +3024,19 @@ function buildObjectItems(context: SqlCompletionContext, objects: SqlCompletionO
           ? quoteSqlIdentifier(object.name, dialect)
           : (object.applyName ?? (object.schema && !objectInCurrentSchema ? `${quoteSqlIdentifier(object.schema, dialect)}.${quoteSqlIdentifier(object.name, dialect)}` : quoteSqlIdentifier(object.name, dialect)));
       const locationDetail = object.type === "trigger" && object.parentName ? `trigger on ${object.parentName}` : object.parentName ? `${object.type} in ${object.parentName}` : object.schema ? `${object.type} in ${object.schema}` : object.type;
-      const detail = object.dataType ? `${locationDetail}  [${object.dataType}]` : locationDetail;
+      const signature = object.signature?.trim();
+      const detail = [locationDetail, signature ? `(${signature})` : undefined, object.dataType ? `[${object.dataType}]` : undefined].filter(Boolean).join("  ");
       const schemaBoost = onlyFunctions ? Math.min(object.boost ?? 0, 1000) : (object.boost ?? 0);
       const typeBoost = routineTypeBoost(object.type, prioritizeOracleFunctions && !onlyFunctions);
+      const baseDedupeKey = object.applyName || (databaseType === "oracle" && object.schema) ? applyName : undefined;
       return {
         label: object.name,
         type: "function" as const,
         detail,
         info: buildRoutineInfo(object),
-        apply: object.type === "trigger" || object.type === "package" ? applyName : `${applyName}()`,
+        apply: object.type === "trigger" || object.type === "package" ? applyName : buildRoutineApply(applyName, object.signature),
         boost: computeBoost(object.name, context.prefix) + typeBoost + schemaBoost,
-        dedupeKey: object.applyName || (databaseType === "oracle" && object.schema) ? applyName : undefined,
+        dedupeKey: signature ? `${baseDedupeKey ?? object.name}(${signature})` : baseDedupeKey,
         // Preserve exact routine matches before the capped candidate list is truncated.
         exactMatch: !!context.prefix && object.name.toLowerCase() === context.prefix.toLowerCase(),
       };
@@ -3043,6 +3045,51 @@ function buildObjectItems(context: SqlCompletionContext, objects: SqlCompletionO
     .slice(0, MAX_TABLE_COMPLETION_ITEMS);
 }
 
+function buildRoutineApply(applyName: string, signature?: string): string {
+  const parameters = splitRoutineSignatureParameters(signature?.trim() ?? "");
+  if (parameters.length === 0) return `${applyName}()`;
+  return `${applyName}(${parameters.map((parameter, index) => `\${${index + 1}:${escapeSnippetFieldName(parameter)}}`).join(", ")})`;
+}
+
+function splitRoutineSignatureParameters(signature: string): string[] {
+  if (!signature) return [];
+  const parameters: string[] = [];
+  let start = 0;
+  let parenthesisDepth = 0;
+  let bracketDepth = 0;
+  let quoted = false;
+
+  for (let index = 0; index < signature.length; index++) {
+    const char = signature[index];
+    if (char === '"') {
+      if (quoted && signature[index + 1] === '"') {
+        index++;
+      } else {
+        quoted = !quoted;
+      }
+      continue;
+    }
+    if (quoted) continue;
+    if (char === "(") parenthesisDepth++;
+    else if (char === ")" && parenthesisDepth > 0) parenthesisDepth--;
+    else if (char === "[") bracketDepth++;
+    else if (char === "]" && bracketDepth > 0) bracketDepth--;
+    else if (char === "," && parenthesisDepth === 0 && bracketDepth === 0) {
+      const parameter = signature.slice(start, index).trim();
+      if (parameter) parameters.push(parameter);
+      start = index + 1;
+    }
+  }
+
+  const parameter = signature.slice(start).trim();
+  if (parameter) parameters.push(parameter);
+  return parameters;
+}
+
+function escapeSnippetFieldName(value: string): string {
+  return value.replace(/[{}]/g, "\\$&");
+}
+
 function buildRoutineInfo(object: SqlCompletionObject): string | undefined {
   const qualifiedName = object.parentName ? [object.parentSchema ?? object.schema, object.parentName, object.name].filter(Boolean).join(".") : [object.schema, object.name].filter(Boolean).join(".");
   const parts = [qualifiedName || object.name, object.signature?.trim(), object.comment?.trim()].filter((part): part is string => !!part);

apps/desktop/src/stores/connectionStore.ts

@@ -5130,6 +5130,7 @@ export const useConnectionStore = defineStore("connection", () => {
           parentSchema: candidate.parent_schema ?? undefined,
           parentName: candidate.parent_name ?? undefined,
           dataType,
+          signature: candidate.signature ?? undefined,
           comment: candidate.comment ?? null,
           applyName: completionCandidateApplyName(candidate.name, candidate.schema, preferredSchema),
           boost: oracleMetadata ? completionCandidateSchemaBoost(candidate.schema, preferredSchema) : completionRoutineSchemaBoost(candidate.schema, preferredSchema),
@@ -5736,7 +5737,7 @@ export const useConnectionStore = defineStore("connection", () => {
     const seen = new Set<string>();
     const deduped: SqlCompletionObject[] = [];
     for (const object of objects) {
-      const key = `${object.type}:${object.schema ?? ""}:${object.name}:${object.parentName ?? ""}`.toLowerCase();
+      const key = `${object.type}:${object.schema ?? ""}:${object.name}:${object.parentName ?? ""}:${object.signature?.trim() ?? ""}`.toLowerCase();
       if (seen.has(key)) continue;
       seen.add(key);
       deduped.push(object);

apps/desktop/src/types/database.ts

@@ -106,6 +106,7 @@ export interface CompletionAssistantCandidate {
   parent_name?: string | null;
   comment?: string | null;
   data_type?: string | null;
+  signature?: string | null;
 }
 
 export interface CompletionAssistantResponse {