Added window functions

Author: ackava

src/tests/expressions/sql/window-functions.test.ts

@@ -0,0 +1,30 @@
+import assert from "assert";
+import QueryCompiler from "../../../compiler/QueryCompiler.js";
+import Sql from "../../../sql/Sql.js";
+
+export default function () {
+
+    const compiler = QueryCompiler.instance;
+
+    const names = ["Akash", "Simmi"];
+
+    let r = compiler.execute({ names }, (p) => (x) => Sql.window.rank.orderBy(x.marks));
+    assert.equal("RANK() OVER (ORDER BY x.marks)", r.text);
+
+    r = compiler.execute({ names }, (p) => (x) => Sql.window.rank.partitionByOrderBy(x.classRoom, x.marks));
+    assert.equal("RANK() OVER (PARTITION BY x.classRoom ORDER BY x.marks)", r.text);
+
+    r = compiler.execute({ names }, (p) => (x) => Sql.window.denseRank.orderBy(x.marks));
+    assert.equal("DENSE_RANK() OVER (ORDER BY x.marks)", r.text);
+
+    r = compiler.execute({ names }, (p) => (x) => Sql.window.denseRank.partitionByOrderBy(x.classRoom, x.marks));
+    assert.equal("DENSE_RANK() OVER (PARTITION BY x.classRoom ORDER BY x.marks)", r.text);
+
+    r = compiler.execute({ names }, (p) => (x) => Sql.window.rowNumber.orderBy(x.marks));
+    assert.equal("ROW_NUMBER() OVER (ORDER BY x.marks)", r.text);
+
+    r = compiler.execute({ names }, (p) => (x) => Sql.window.rowNumber.partitionByOrderBy(x.classRoom, x.marks));
+    assert.equal("ROW_NUMBER() OVER (PARTITION BY x.classRoom ORDER BY x.marks)", r.text);
+
+}
+