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https://issues.apache.org/jira/browse/FLINK-6693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16082533#comment-16082533
]
ASF GitHub Bot commented on FLINK-6693:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4078#discussion_r126747879
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/codegen/calls/DateFormatCallGen.scala
---
@@ -0,0 +1,44 @@
+/*
+ * 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.flink.table.codegen.calls
+
+import org.apache.flink.api.common.typeinfo.BasicTypeInfo._
+import org.apache.flink.table.codegen.{CodeGenerator, GeneratedExpression}
+import
org.apache.flink.table.codegen.calls.CallGenerator.generateCallIfArgsNotNull
+
+class DateFormatCallGen extends CallGenerator {
+ override def generate(codeGenerator: CodeGenerator,
+ operands: Seq[GeneratedExpression])
+ : GeneratedExpression = {
+
+ if (operands.last.literal) {
+ val formatter = codeGenerator.addReusableDateFormatter(operands.last)
+ generateCallIfArgsNotNull(codeGenerator.nullCheck, STRING_TYPE_INFO,
operands) {
+ terms =>s"$formatter.print(${terms.head})"
--- End diff --
+space between `=>` and `s`
> Support DATE_FORMAT function in the Table / SQL API
> ---------------------------------------------------
>
> Key: FLINK-6693
> URL: https://issues.apache.org/jira/browse/FLINK-6693
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Haohui Mai
> Assignee: Haohui Mai
>
> It would be quite handy to support the {{DATE_FORMAT}} function in Flink to
> support various date / time related operations:
> The specification of the {{DATE_FORMAT}} function can be found in
> https://prestodb.io/docs/current/functions/datetime.html.
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