fix(sql): correct table introducer keyword completion

apps/desktop/src/lib/__tests__/sql/semantic/completion.spec.ts

@@ -205,6 +205,24 @@ describe("semantic SQL completion candidates", () => {
     expect(items).toEqual(expect.arrayContaining([expect.objectContaining({ label: expectedKeyword, type: "keyword" })]));
   });
 
+  it.each([
+    ["UPDATE", "update|", "sqlserver"],
+    ["FROM", "select * from|", "mysql"],
+    ["JOIN", "select * from t1 join|", "mysql"],
+  ] as const)("keeps a fully typed table introducer keyword (%s) in the candidate list", (keyword, sql, databaseType) => {
+    const { context, items } = semanticCompletion(sql, {}, { databaseType });
+
+    expect(context.suggestKeywords).toBe(true);
+    expect(items).toEqual(expect.arrayContaining([expect.objectContaining({ label: keyword, type: "keyword" })]));
+  });
+
+  it("offers tables once a table introducer keyword is committed with whitespace", () => {
+    const { context, items } = semanticCompletion("update |", { tables: [{ name: "orders" }] }, { databaseType: "sqlserver" });
+
+    expect(context.exclusiveTableSuggestions).toBe(true);
+    expect(items).toEqual(expect.arrayContaining([expect.objectContaining({ label: "orders", type: "table" })]));
+  });
+
   it("does not offer keyword continuations for qualified column prefixes", () => {
     const columnsByTable = new Map<string, SqlCompletionColumn[]>([["t", [{ name: "order_number", table: "t" }]]]);
     const { context, items } = semanticCompletion("SELECT * FROM t WHERE t.or|", { columnsByTable }, { databaseType: "mysql", dialect: "mysql" });

apps/desktop/src/lib/sql/semantic/model.ts

@@ -1010,12 +1010,11 @@ function buildCursorIntent(tokens: readonly SqlSemanticToken[], cursor: number,
     };
   }
 
+  // Same rule as the unqualified table slot below: the introducer is the word before the
+  // identifier being completed, never the identifier itself (issue #10415).
   if (
     trailing.qualifierParts.length > 0 &&
-    (previous === "from" ||
-      previous === "join" ||
-      TABLE_INTRODUCERS.has(previous) ||
-      TABLE_INTRODUCERS.has(wordBeforeReplacement) ||
+    (TABLE_INTRODUCERS.has(wordBeforeReplacement) ||
       TABLE_INTRODUCERS.has(wordBeforeTrailing) ||
       (!!targetSource && !targetSource.alias && trailing.replacementRange.start >= targetSource.sourceSpan.start && trailing.replacementRange.start <= targetSource.sourceSpan.end + 1 && TABLE_INTRODUCERS.has(wordBeforePosition(tokens, targetSource.sourceSpan.start))))
   ) {
@@ -1027,8 +1026,13 @@ function buildCursorIntent(tokens: readonly SqlSemanticToken[], cursor: number,
     return { kind: "alias_column", prefix: trailing.prefix, replacementRange: trailing.replacementRange, qualifierParts: trailing.qualifierParts, targetSourceId: targetSource.id, expectedObjectKinds: ["column"], confidence: "high" };
   }
 
-  if (TABLE_INTRODUCERS.has(previous) || TABLE_INTRODUCERS.has(wordBeforeReplacement) || TABLE_INTRODUCERS.has(wordBeforeTrailing) || previous === "from" || previous === "join" || wordBeforeReplacement === "from" || wordBeforeReplacement === "join" || tableListContinuation) {
-    return { kind: previous === "join" ? "table" : "table", prefix: trailing.prefix, replacementRange: trailing.replacementRange, qualifierParts: trailing.qualifierParts, expectedObjectKinds: ["table", "view"], confidence: "high" };
+  // A table introducer only introduces the slot that follows it, so both checks read
+  // the word before the identifier being completed (wordBeforeTrailing) or before its
+  // whole qualified name (wordBeforeReplacement). `previous` must not be used here: it
+  // is the word at the cursor, so typing `update`/`from`/`join` in full made the
+  // keyword introduce its own slot and dropped its own completion (issue #10415).
+  if (TABLE_INTRODUCERS.has(wordBeforeReplacement) || TABLE_INTRODUCERS.has(wordBeforeTrailing) || tableListContinuation) {
+    return { kind: "table", prefix: trailing.prefix, replacementRange: trailing.replacementRange, qualifierParts: trailing.qualifierParts, expectedObjectKinds: ["table", "view"], confidence: "high" };
   }
 
   if (previous === "call" || previous === "exec" || previous === "execute") {