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Posted to issues@flink.apache.org by wuchong <gi...@git.apache.org> on 2017/06/03 16:13:45 UTC
[GitHub] flink pull request #4070: [FLINK-6834] [table] Support scalar functions on O...
GitHub user wuchong opened a pull request:
https://github.com/apache/flink/pull/4070
[FLINK-6834] [table] Support scalar functions on Over Window
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You can merge this pull request into a Git repository by running:
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Alternatively you can review and apply these changes as the patch at:
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This closes #4070
----
commit 1d50719632910a4992633551d456182f6b6b4cfd
Author: Jark Wu <wu...@alibaba-inc.com>
Date: 2017-06-03T15:31:00Z
[FLINK-6834] [table] Support scalar functions on Over Window
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[GitHub] flink pull request #4070: [FLINK-6834] [table] Support scalar functions on O...
Posted by fhueske <gi...@git.apache.org>.
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4070#discussion_r120623151
--- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/ProjectionTranslator.scala ---
@@ -226,30 +226,69 @@ object ProjectionTranslator {
overWindows: Array[OverWindow],
tEnv: TableEnvironment): Seq[Expression] = {
- def resolveOverWindow(unresolvedCall: UnresolvedOverCall): Expression = {
-
- val overWindow = overWindows.find(_.alias.equals(unresolvedCall.alias))
- if (overWindow.isDefined) {
- OverCall(
- unresolvedCall.agg,
- overWindow.get.partitionBy,
- overWindow.get.orderBy,
- overWindow.get.preceding,
- overWindow.get.following)
- } else {
- unresolvedCall
- }
- }
+ exprs.map(e => replaceOverCall(e, overWindows, tEnv))
+ }
- val projectList = new ListBuffer[Expression]
- exprs.foreach {
- case Alias(u: UnresolvedOverCall, name, _) =>
- projectList += Alias(resolveOverWindow(u), name)
+ /**
+ * Find and replace UnresolvedOverCall with OverCall
+ *
+ * @param expr the expression to check
+ * @return an expression with correct resolved OverCall
+ */
+ private def replaceOverCall(
+ expr: Expression,
+ overWindows: Array[OverWindow],
+ tableEnv: TableEnvironment): Expression = {
+
+ expr match {
case u: UnresolvedOverCall =>
- projectList += resolveOverWindow(u)
- case e: Expression => projectList += e
+ val overWindow = overWindows.find(_.alias.equals(u.alias))
+ if (overWindow.isDefined) {
+ OverCall(
+ u.agg,
+ overWindow.get.partitionBy,
+ overWindow.get.orderBy,
+ overWindow.get.preceding,
+ overWindow.get.following)
+ } else {
+ u
+ }
+
+ case u: UnaryExpression =>
+ val c = replaceOverCall(u.child, overWindows, tableEnv)
--- End diff --
Thanks @sunjincheng121. That makes sense. +1 to that proposal
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[GitHub] flink pull request #4070: [FLINK-6834] [table] Support scalar functions on O...
Posted by sunjincheng121 <gi...@git.apache.org>.
Github user sunjincheng121 commented on a diff in the pull request:
https://github.com/apache/flink/pull/4070#discussion_r120078093
--- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/ProjectionTranslator.scala ---
@@ -226,30 +226,69 @@ object ProjectionTranslator {
overWindows: Array[OverWindow],
tEnv: TableEnvironment): Seq[Expression] = {
- def resolveOverWindow(unresolvedCall: UnresolvedOverCall): Expression = {
-
- val overWindow = overWindows.find(_.alias.equals(unresolvedCall.alias))
- if (overWindow.isDefined) {
- OverCall(
- unresolvedCall.agg,
- overWindow.get.partitionBy,
- overWindow.get.orderBy,
- overWindow.get.preceding,
- overWindow.get.following)
- } else {
- unresolvedCall
- }
- }
+ exprs.map(e => replaceOverCall(e, overWindows, tEnv))
+ }
- val projectList = new ListBuffer[Expression]
- exprs.foreach {
- case Alias(u: UnresolvedOverCall, name, _) =>
- projectList += Alias(resolveOverWindow(u), name)
+ /**
+ * Find and replace UnresolvedOverCall with OverCall
+ *
+ * @param expr the expression to check
+ * @return an expression with correct resolved OverCall
+ */
+ private def replaceOverCall(
+ expr: Expression,
+ overWindows: Array[OverWindow],
+ tableEnv: TableEnvironment): Expression = {
+
+ expr match {
case u: UnresolvedOverCall =>
- projectList += resolveOverWindow(u)
- case e: Expression => projectList += e
+ val overWindow = overWindows.find(_.alias.equals(u.alias))
+ if (overWindow.isDefined) {
+ OverCall(
+ u.agg,
+ overWindow.get.partitionBy,
+ overWindow.get.orderBy,
+ overWindow.get.preceding,
+ overWindow.get.following)
+ } else {
+ u
+ }
+
+ case u: UnaryExpression =>
+ val c = replaceOverCall(u.child, overWindows, tableEnv)
--- End diff --
Can we add a projection for cover this condition? Such as add `Abs((countFun('b) over 'w))`.
What do you think?
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[GitHub] flink issue #4070: [FLINK-6834] [table] Support scalar functions on Over Win...
Posted by sunjincheng121 <gi...@git.apache.org>.
Github user sunjincheng121 commented on the issue:
https://github.com/apache/flink/pull/4070
Thanks for updated. :)
+1 to merged.
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[GitHub] flink pull request #4070: [FLINK-6834] [table] Support scalar functions on O...
Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/4070
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[GitHub] flink pull request #4070: [FLINK-6834] [table] Support scalar functions on O...
Posted by sunjincheng121 <gi...@git.apache.org>.
Github user sunjincheng121 commented on a diff in the pull request:
https://github.com/apache/flink/pull/4070#discussion_r120614930
--- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/ProjectionTranslator.scala ---
@@ -226,30 +226,69 @@ object ProjectionTranslator {
overWindows: Array[OverWindow],
tEnv: TableEnvironment): Seq[Expression] = {
- def resolveOverWindow(unresolvedCall: UnresolvedOverCall): Expression = {
-
- val overWindow = overWindows.find(_.alias.equals(unresolvedCall.alias))
- if (overWindow.isDefined) {
- OverCall(
- unresolvedCall.agg,
- overWindow.get.partitionBy,
- overWindow.get.orderBy,
- overWindow.get.preceding,
- overWindow.get.following)
- } else {
- unresolvedCall
- }
- }
+ exprs.map(e => replaceOverCall(e, overWindows, tEnv))
+ }
- val projectList = new ListBuffer[Expression]
- exprs.foreach {
- case Alias(u: UnresolvedOverCall, name, _) =>
- projectList += Alias(resolveOverWindow(u), name)
+ /**
+ * Find and replace UnresolvedOverCall with OverCall
+ *
+ * @param expr the expression to check
+ * @return an expression with correct resolved OverCall
+ */
+ private def replaceOverCall(
+ expr: Expression,
+ overWindows: Array[OverWindow],
+ tableEnv: TableEnvironment): Expression = {
+
+ expr match {
case u: UnresolvedOverCall =>
- projectList += resolveOverWindow(u)
- case e: Expression => projectList += e
+ val overWindow = overWindows.find(_.alias.equals(u.alias))
+ if (overWindow.isDefined) {
+ OverCall(
+ u.agg,
+ overWindow.get.partitionBy,
+ overWindow.get.orderBy,
+ overWindow.get.preceding,
+ overWindow.get.following)
+ } else {
+ u
+ }
+
+ case u: UnaryExpression =>
+ val c = replaceOverCall(u.child, overWindows, tableEnv)
+ u.makeCopy(Array(c))
+
+ case b: BinaryExpression =>
+ val l = replaceOverCall(b.left, overWindows, tableEnv)
+ val r = replaceOverCall(b.right, overWindows, tableEnv)
+ b.makeCopy(Array(l, r))
+
+ // Functions calls
+ case c @ Call(name, args: Seq[Expression]) =>
+ val newArgs =
+ args.map(
+ (exp: Expression) =>
+ replaceOverCall(exp, overWindows, tableEnv))
+ c.makeCopy(Array(name, newArgs))
+
+ // Scala functions
+ case sfc @ ScalarFunctionCall(clazz, args: Seq[Expression]) =>
+ val newArgs: Seq[Expression] =
+ args.map(
+ (exp: Expression) =>
+ replaceOverCall(exp, overWindows, tableEnv))
+ sfc.makeCopy(Array(clazz, newArgs))
+
+ // Array constructor
+ case c @ ArrayConstructor(args) =>
--- End diff --
Thanks for the explanation @fhueske :)
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[GitHub] flink issue #4070: [FLINK-6834] [table] Support scalar functions on Over Win...
Posted by zentol <gi...@git.apache.org>.
Github user zentol commented on the issue:
https://github.com/apache/flink/pull/4070
merging.
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[GitHub] flink pull request #4070: [FLINK-6834] [table] Support scalar functions on O...
Posted by fhueske <gi...@git.apache.org>.
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4070#discussion_r120590532
--- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/ProjectionTranslator.scala ---
@@ -226,30 +226,69 @@ object ProjectionTranslator {
overWindows: Array[OverWindow],
tEnv: TableEnvironment): Seq[Expression] = {
- def resolveOverWindow(unresolvedCall: UnresolvedOverCall): Expression = {
-
- val overWindow = overWindows.find(_.alias.equals(unresolvedCall.alias))
- if (overWindow.isDefined) {
- OverCall(
- unresolvedCall.agg,
- overWindow.get.partitionBy,
- overWindow.get.orderBy,
- overWindow.get.preceding,
- overWindow.get.following)
- } else {
- unresolvedCall
- }
- }
+ exprs.map(e => replaceOverCall(e, overWindows, tEnv))
+ }
- val projectList = new ListBuffer[Expression]
- exprs.foreach {
- case Alias(u: UnresolvedOverCall, name, _) =>
- projectList += Alias(resolveOverWindow(u), name)
+ /**
+ * Find and replace UnresolvedOverCall with OverCall
+ *
+ * @param expr the expression to check
+ * @return an expression with correct resolved OverCall
+ */
+ private def replaceOverCall(
+ expr: Expression,
+ overWindows: Array[OverWindow],
+ tableEnv: TableEnvironment): Expression = {
+
+ expr match {
case u: UnresolvedOverCall =>
- projectList += resolveOverWindow(u)
- case e: Expression => projectList += e
+ val overWindow = overWindows.find(_.alias.equals(u.alias))
+ if (overWindow.isDefined) {
+ OverCall(
+ u.agg,
+ overWindow.get.partitionBy,
+ overWindow.get.orderBy,
+ overWindow.get.preceding,
+ overWindow.get.following)
+ } else {
+ u
+ }
+
+ case u: UnaryExpression =>
+ val c = replaceOverCall(u.child, overWindows, tableEnv)
+ u.makeCopy(Array(c))
+
+ case b: BinaryExpression =>
+ val l = replaceOverCall(b.left, overWindows, tableEnv)
+ val r = replaceOverCall(b.right, overWindows, tableEnv)
+ b.makeCopy(Array(l, r))
+
+ // Functions calls
+ case c @ Call(name, args: Seq[Expression]) =>
+ val newArgs =
+ args.map(
+ (exp: Expression) =>
+ replaceOverCall(exp, overWindows, tableEnv))
+ c.makeCopy(Array(name, newArgs))
+
+ // Scala functions
+ case sfc @ ScalarFunctionCall(clazz, args: Seq[Expression]) =>
+ val newArgs: Seq[Expression] =
+ args.map(
+ (exp: Expression) =>
+ replaceOverCall(exp, overWindows, tableEnv))
+ sfc.makeCopy(Array(clazz, newArgs))
+
+ // Array constructor
+ case c @ ArrayConstructor(args) =>
--- End diff --
An array constructor would be something like `.select('a, array('b, 'c), 'd)` where `'b` and `'c` would be elements of an array with two fields. Of course, `'b` and `'c` could also be an OVER aggregate.
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[GitHub] flink issue #4070: [FLINK-6834] [table] Support scalar functions on Over Win...
Posted by wuchong <gi...@git.apache.org>.
Github user wuchong commented on the issue:
https://github.com/apache/flink/pull/4070
@sunjincheng121 thank you for your advice. I add the `array` and `abs` test.
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[GitHub] flink pull request #4070: [FLINK-6834] [table] Support scalar functions on O...
Posted by sunjincheng121 <gi...@git.apache.org>.
Github user sunjincheng121 commented on a diff in the pull request:
https://github.com/apache/flink/pull/4070#discussion_r120081629
--- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/ProjectionTranslator.scala ---
@@ -226,30 +226,69 @@ object ProjectionTranslator {
overWindows: Array[OverWindow],
tEnv: TableEnvironment): Seq[Expression] = {
- def resolveOverWindow(unresolvedCall: UnresolvedOverCall): Expression = {
-
- val overWindow = overWindows.find(_.alias.equals(unresolvedCall.alias))
- if (overWindow.isDefined) {
- OverCall(
- unresolvedCall.agg,
- overWindow.get.partitionBy,
- overWindow.get.orderBy,
- overWindow.get.preceding,
- overWindow.get.following)
- } else {
- unresolvedCall
- }
- }
+ exprs.map(e => replaceOverCall(e, overWindows, tEnv))
+ }
- val projectList = new ListBuffer[Expression]
- exprs.foreach {
- case Alias(u: UnresolvedOverCall, name, _) =>
- projectList += Alias(resolveOverWindow(u), name)
+ /**
+ * Find and replace UnresolvedOverCall with OverCall
+ *
+ * @param expr the expression to check
+ * @return an expression with correct resolved OverCall
+ */
+ private def replaceOverCall(
+ expr: Expression,
+ overWindows: Array[OverWindow],
+ tableEnv: TableEnvironment): Expression = {
+
+ expr match {
case u: UnresolvedOverCall =>
- projectList += resolveOverWindow(u)
- case e: Expression => projectList += e
+ val overWindow = overWindows.find(_.alias.equals(u.alias))
+ if (overWindow.isDefined) {
+ OverCall(
+ u.agg,
+ overWindow.get.partitionBy,
+ overWindow.get.orderBy,
+ overWindow.get.preceding,
+ overWindow.get.following)
+ } else {
+ u
+ }
+
+ case u: UnaryExpression =>
+ val c = replaceOverCall(u.child, overWindows, tableEnv)
+ u.makeCopy(Array(c))
+
+ case b: BinaryExpression =>
+ val l = replaceOverCall(b.left, overWindows, tableEnv)
+ val r = replaceOverCall(b.right, overWindows, tableEnv)
+ b.makeCopy(Array(l, r))
+
+ // Functions calls
+ case c @ Call(name, args: Seq[Expression]) =>
+ val newArgs =
+ args.map(
+ (exp: Expression) =>
+ replaceOverCall(exp, overWindows, tableEnv))
+ c.makeCopy(Array(name, newArgs))
+
+ // Scala functions
+ case sfc @ ScalarFunctionCall(clazz, args: Seq[Expression]) =>
+ val newArgs: Seq[Expression] =
+ args.map(
+ (exp: Expression) =>
+ replaceOverCall(exp, overWindows, tableEnv))
+ sfc.makeCopy(Array(clazz, newArgs))
+
+ // Array constructor
+ case c @ ArrayConstructor(args) =>
--- End diff --
Can you explain me that when we using `ArrayConstructor` ?
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[GitHub] flink pull request #4070: [FLINK-6834] [table] Support scalar functions on O...
Posted by fhueske <gi...@git.apache.org>.
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4070#discussion_r120586848
--- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/ProjectionTranslator.scala ---
@@ -226,30 +226,69 @@ object ProjectionTranslator {
overWindows: Array[OverWindow],
tEnv: TableEnvironment): Seq[Expression] = {
- def resolveOverWindow(unresolvedCall: UnresolvedOverCall): Expression = {
-
- val overWindow = overWindows.find(_.alias.equals(unresolvedCall.alias))
- if (overWindow.isDefined) {
- OverCall(
- unresolvedCall.agg,
- overWindow.get.partitionBy,
- overWindow.get.orderBy,
- overWindow.get.preceding,
- overWindow.get.following)
- } else {
- unresolvedCall
- }
- }
+ exprs.map(e => replaceOverCall(e, overWindows, tEnv))
+ }
- val projectList = new ListBuffer[Expression]
- exprs.foreach {
- case Alias(u: UnresolvedOverCall, name, _) =>
- projectList += Alias(resolveOverWindow(u), name)
+ /**
+ * Find and replace UnresolvedOverCall with OverCall
+ *
+ * @param expr the expression to check
+ * @return an expression with correct resolved OverCall
+ */
+ private def replaceOverCall(
+ expr: Expression,
+ overWindows: Array[OverWindow],
+ tableEnv: TableEnvironment): Expression = {
+
+ expr match {
case u: UnresolvedOverCall =>
- projectList += resolveOverWindow(u)
- case e: Expression => projectList += e
+ val overWindow = overWindows.find(_.alias.equals(u.alias))
+ if (overWindow.isDefined) {
+ OverCall(
+ u.agg,
+ overWindow.get.partitionBy,
+ overWindow.get.orderBy,
+ overWindow.get.preceding,
+ overWindow.get.following)
+ } else {
+ u
+ }
+
+ case u: UnaryExpression =>
+ val c = replaceOverCall(u.child, overWindows, tableEnv)
--- End diff --
Can you explain a bit more what you mean @sunjincheng121 ?
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[GitHub] flink pull request #4070: [FLINK-6834] [table] Support scalar functions on O...
Posted by sunjincheng121 <gi...@git.apache.org>.
Github user sunjincheng121 commented on a diff in the pull request:
https://github.com/apache/flink/pull/4070#discussion_r120614729
--- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/ProjectionTranslator.scala ---
@@ -226,30 +226,69 @@ object ProjectionTranslator {
overWindows: Array[OverWindow],
tEnv: TableEnvironment): Seq[Expression] = {
- def resolveOverWindow(unresolvedCall: UnresolvedOverCall): Expression = {
-
- val overWindow = overWindows.find(_.alias.equals(unresolvedCall.alias))
- if (overWindow.isDefined) {
- OverCall(
- unresolvedCall.agg,
- overWindow.get.partitionBy,
- overWindow.get.orderBy,
- overWindow.get.preceding,
- overWindow.get.following)
- } else {
- unresolvedCall
- }
- }
+ exprs.map(e => replaceOverCall(e, overWindows, tEnv))
+ }
- val projectList = new ListBuffer[Expression]
- exprs.foreach {
- case Alias(u: UnresolvedOverCall, name, _) =>
- projectList += Alias(resolveOverWindow(u), name)
+ /**
+ * Find and replace UnresolvedOverCall with OverCall
+ *
+ * @param expr the expression to check
+ * @return an expression with correct resolved OverCall
+ */
+ private def replaceOverCall(
+ expr: Expression,
+ overWindows: Array[OverWindow],
+ tableEnv: TableEnvironment): Expression = {
+
+ expr match {
case u: UnresolvedOverCall =>
- projectList += resolveOverWindow(u)
- case e: Expression => projectList += e
+ val overWindow = overWindows.find(_.alias.equals(u.alias))
+ if (overWindow.isDefined) {
+ OverCall(
+ u.agg,
+ overWindow.get.partitionBy,
+ overWindow.get.orderBy,
+ overWindow.get.preceding,
+ overWindow.get.following)
+ } else {
+ u
+ }
+
+ case u: UnaryExpression =>
+ val c = replaceOverCall(u.child, overWindows, tableEnv)
--- End diff --
Ah, I meant the current test case can not execute to this branch， I suggest add `Abs((countFun('b) over 'w))` into test case SELECT clause. i.e:
.select(
'a, 'b, 'c,
'b.sum over 'w,
"SUM:".toExpr + ('b.sum over 'w),
countFun('b) over 'w,
(countFun('b) over 'w) + 1,
**Abs((countFun('b) over 'w)), -> // cover UnaryExpression case**
plusOne(countFun('b) over 'w),
**array(countFun('c) over 'w, countFun('b) over 'w), -> // cover ArrayConstructor case**
'b.avg over 'w,
'b.max over 'w,
'b.min over 'w,
weightAvgFun('b, 'a) over 'w)
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