refactor(postgres) improve postgres code base (#20808)

Co-authored-by: cirospaciari <6379399+cirospaciari@users.noreply.github.com>

src/sql/postgres/ObjectIterator.zig

@@ -0,0 +1,64 @@
+array: JSValue,
+columns: JSValue = .zero,
+globalObject: *JSC.JSGlobalObject,
+cell_i: usize = 0,
+row_i: usize = 0,
+current_row: JSC.JSValue = .zero,
+columns_count: usize = 0,
+array_length: usize = 0,
+any_failed: bool = false,
+
+pub fn next(this: *ObjectIterator) ?JSC.JSValue {
+    if (this.row_i >= this.array_length) {
+        return null;
+    }
+
+    const cell_i = this.cell_i;
+    this.cell_i += 1;
+    const row_i = this.row_i;
+
+    const globalObject = this.globalObject;
+
+    if (this.current_row == .zero) {
+        this.current_row = JSC.JSObject.getIndex(this.array, globalObject, @intCast(row_i)) catch {
+            this.any_failed = true;
+            return null;
+        };
+        if (this.current_row.isEmptyOrUndefinedOrNull()) {
+            return globalObject.throw("Expected a row to be returned at index {d}", .{row_i}) catch null;
+        }
+    }
+
+    defer {
+        if (this.cell_i >= this.columns_count) {
+            this.cell_i = 0;
+            this.current_row = .zero;
+            this.row_i += 1;
+        }
+    }
+
+    const property = JSC.JSObject.getIndex(this.columns, globalObject, @intCast(cell_i)) catch {
+        this.any_failed = true;
+        return null;
+    };
+    if (property.isUndefined()) {
+        return globalObject.throw("Expected a column at index {d} in row {d}", .{ cell_i, row_i }) catch null;
+    }
+
+    const value = this.current_row.getOwnByValue(globalObject, property);
+    if (value == .zero or (value != null and value.?.isUndefined())) {
+        if (!globalObject.hasException())
+            return globalObject.throw("Expected a value at index {d} in row {d}", .{ cell_i, row_i }) catch null;
+        this.any_failed = true;
+        return null;
+    }
+    return value;
+}
+
+// @sortImports
+
+const ObjectIterator = @This();
+const bun = @import("bun");
+
+const JSC = bun.JSC;
+const JSValue = JSC.JSValue;