| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.ignite.spark.impl.optimization |
| |
| import org.apache.spark.sql.catalyst.expressions.{Expression, _} |
| |
| /** |
| * Object to support expressions to work with date/timestamp. |
| */ |
| private[optimization] object DateExpressions extends SupportedExpressions { |
| /** @inheritdoc */ |
| def apply(expr: Expression, checkChild: (Expression) ⇒ Boolean): Boolean = expr match { |
| case CurrentDate(None) ⇒ |
| true |
| |
| case CurrentTimestamp() ⇒ |
| true |
| |
| case DateAdd(startDate, days) ⇒ |
| checkChild(startDate) && checkChild(days) |
| |
| case DateDiff(date1, date2) ⇒ |
| checkChild(date1) && checkChild(date2) |
| |
| case DayOfMonth(date) ⇒ |
| checkChild(date) |
| |
| case DayOfYear(date) ⇒ |
| checkChild(date) |
| |
| case Hour(date, _) ⇒ |
| checkChild(date) |
| |
| case Minute(date, _) ⇒ |
| checkChild(date) |
| |
| case Month(date) ⇒ |
| checkChild(date) |
| |
| case ParseToDate(left, format, child) ⇒ |
| checkChild(left) && (format.isEmpty || checkChild(format.get)) && checkChild(child) |
| |
| case Quarter(date) ⇒ |
| checkChild(date) |
| |
| case Second(date, _) ⇒ |
| checkChild(date) |
| |
| case WeekOfYear(date) ⇒ |
| checkChild(date) |
| |
| case Year(date) ⇒ |
| checkChild(date) |
| |
| case _ ⇒ |
| false |
| } |
| |
| /** @inheritdoc */ |
| override def toString(expr: Expression, childToString: Expression ⇒ String, useQualifier: Boolean, |
| useAlias: Boolean): Option[String] = expr match { |
| case CurrentDate(_) ⇒ |
| Some(s"CURRENT_DATE()") |
| |
| case CurrentTimestamp() ⇒ |
| Some(s"CURRENT_TIMESTAMP()") |
| |
| case DateAdd(startDate, days) ⇒ |
| Some(s"CAST(DATEADD('DAY', ${childToString(days)}, ${childToString(startDate)}) AS DATE)") |
| |
| case DateDiff(date1, date2) ⇒ |
| Some(s"CAST(DATEDIFF('DAY', ${childToString(date1)}, ${childToString(date2)}) AS INT)") |
| |
| case DayOfMonth(date) ⇒ |
| Some(s"DAY_OF_MONTH(${childToString(date)})") |
| |
| case DayOfYear(date) ⇒ |
| Some(s"DAY_OF_YEAR(${childToString(date)})") |
| |
| case Hour(date, _) ⇒ |
| Some(s"HOUR(${childToString(date)})") |
| |
| case Minute(date, _) ⇒ |
| Some(s"MINUTE(${childToString(date)})") |
| |
| case Month(date) ⇒ |
| Some(s"MINUTE(${childToString(date)})") |
| |
| case ParseToDate(left, formatOption, _) ⇒ |
| formatOption match { |
| case Some(format) ⇒ |
| Some(s"PARSEDATETIME(${childToString(left)}, ${childToString(format)})") |
| case None ⇒ |
| Some(s"PARSEDATETIME(${childToString(left)})") |
| } |
| |
| case Quarter(date) ⇒ |
| Some(s"QUARTER(${childToString(date)})") |
| |
| case Second(date, _) ⇒ |
| Some(s"SECOND(${childToString(date)})") |
| |
| case WeekOfYear(date) ⇒ |
| Some(s"WEEK(${childToString(date)})") |
| |
| case Year(date) ⇒ |
| Some(s"YEAR(${childToString(date)})") |
| |
| case _ ⇒ |
| None |
| } |
| } |