chore: import upstream snapshot with attribution

server/functions/now.go

@@ -0,0 +1,62 @@
+// Copyright 2025 Dolthub, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package functions
+
+import (
+	"github.com/dolthub/go-mysql-server/sql"
+
+	"github.com/dolthub/doltgresql/server/functions/framework"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+)
+
+// initNow registers the functions to the catalog.
+func initNow() {
+	framework.RegisterFunction(clock_timestamp)
+	framework.RegisterFunction(now)
+	framework.RegisterFunction(timeofday_)
+}
+
+// clock_timestamp represents the PostgreSQL function of the same name, taking the same parameters.
+var clock_timestamp = framework.Function0{
+	Name:   "clock_timestamp",
+	Return: pgtypes.TimestampTZ,
+	Strict: true,
+	Callable: func(ctx *sql.Context) (any, error) {
+		// Current date and time (changes during statement execution)
+		return ctx.QueryTime(), nil
+	},
+}
+
+// now represents the PostgreSQL function of the same name, taking the same parameters.
+var now = framework.Function0{
+	Name:   "now",
+	Return: pgtypes.TimestampTZ,
+	Strict: true,
+	Callable: func(ctx *sql.Context) (any, error) {
+		// Current date and time (start of current transaction)
+		return ctx.QueryTime(), nil
+	},
+}
+
+// timeofday_ represents the PostgreSQL function of the same name, taking the same parameters.
+var timeofday_ = framework.Function0{
+	Name:   "timeofday",
+	Return: pgtypes.TimestampTZ,
+	Strict: true,
+	Callable: func(ctx *sql.Context) (any, error) {
+		// Current date and time (like clock_timestamp, but as a text string)
+		return ctx.QueryTime().Format(`Wed Feb 25 11:06:39.999999 2015 PST`), nil
+	},
+}