Repository: spark Updated Branches: refs/heads/master 0d00c768a -> 714811d0b
[SPARK-20311][SQL] Support aliases for table value functions ## What changes were proposed in this pull request? This pr added parsing rules to support aliases in table value functions. ## How was this patch tested? Added tests in `PlanParserSuite`. Author: Takeshi Yamamuro <yamam...@apache.org> Closes #17666 from maropu/SPARK-20311. Project: http://git-wip-us.apache.org/repos/asf/spark/repo Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/714811d0 Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/714811d0 Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/714811d0 Branch: refs/heads/master Commit: 714811d0b5bcb5d47c39782ff74f898d276ecc59 Parents: 0d00c76 Author: Takeshi Yamamuro <yamam...@apache.org> Authored: Tue May 9 20:22:51 2017 +0800 Committer: Wenchen Fan <wenc...@databricks.com> Committed: Tue May 9 20:22:51 2017 +0800 ---------------------------------------------------------------------- .../apache/spark/sql/catalyst/parser/SqlBase.g4 | 20 ++++++++++++------ .../analysis/ResolveTableValuedFunctions.scala | 22 +++++++++++++++++--- .../sql/catalyst/analysis/unresolved.scala | 10 +++++++-- .../spark/sql/catalyst/parser/AstBuilder.scala | 17 +++++++++++---- .../sql/catalyst/analysis/AnalysisSuite.scala | 14 ++++++++++++- .../sql/catalyst/parser/PlanParserSuite.scala | 13 +++++++++++- 6 files changed, 79 insertions(+), 17 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/spark/blob/714811d0/sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 ---------------------------------------------------------------------- diff --git a/sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 b/sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 index 14c511f..41daf58 100644 --- a/sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 +++ b/sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 @@ -472,15 +472,23 @@ identifierComment ; relationPrimary - : tableIdentifier sample? (AS? strictIdentifier)? #tableName - | '(' queryNoWith ')' sample? (AS? strictIdentifier)? #aliasedQuery - | '(' relation ')' sample? (AS? strictIdentifier)? #aliasedRelation - | inlineTable #inlineTableDefault2 - | identifier '(' (expression (',' expression)*)? ')' #tableValuedFunction + : tableIdentifier sample? (AS? strictIdentifier)? #tableName + | '(' queryNoWith ')' sample? (AS? strictIdentifier)? #aliasedQuery + | '(' relation ')' sample? (AS? strictIdentifier)? #aliasedRelation + | inlineTable #inlineTableDefault2 + | functionTable #tableValuedFunction ; inlineTable - : VALUES expression (',' expression)* (AS? identifier identifierList?)? + : VALUES expression (',' expression)* tableAlias + ; + +functionTable + : identifier '(' (expression (',' expression)*)? ')' tableAlias + ; + +tableAlias + : (AS? identifier identifierList?)? ; rowFormat http://git-wip-us.apache.org/repos/asf/spark/blob/714811d0/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveTableValuedFunctions.scala ---------------------------------------------------------------------- diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveTableValuedFunctions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveTableValuedFunctions.scala index de6de24..dad1340 100644 --- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveTableValuedFunctions.scala +++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ResolveTableValuedFunctions.scala @@ -19,8 +19,8 @@ package org.apache.spark.sql.catalyst.analysis import java.util.Locale -import org.apache.spark.sql.catalyst.expressions.Expression -import org.apache.spark.sql.catalyst.plans.logical.{LogicalPlan, Range} +import org.apache.spark.sql.catalyst.expressions.{Alias, Expression} +import org.apache.spark.sql.catalyst.plans.logical.{LogicalPlan, Project, Range} import org.apache.spark.sql.catalyst.rules._ import org.apache.spark.sql.types.{DataType, IntegerType, LongType} @@ -105,7 +105,7 @@ object ResolveTableValuedFunctions extends Rule[LogicalPlan] { override def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators { case u: UnresolvedTableValuedFunction if u.functionArgs.forall(_.resolved) => - builtinFunctions.get(u.functionName.toLowerCase(Locale.ROOT)) match { + val resolvedFunc = builtinFunctions.get(u.functionName.toLowerCase(Locale.ROOT)) match { case Some(tvf) => val resolved = tvf.flatMap { case (argList, resolver) => argList.implicitCast(u.functionArgs) match { @@ -125,5 +125,21 @@ object ResolveTableValuedFunctions extends Rule[LogicalPlan] { case _ => u.failAnalysis(s"could not resolve `${u.functionName}` to a table-valued function") } + + // If alias names assigned, add `Project` with the aliases + if (u.outputNames.nonEmpty) { + val outputAttrs = resolvedFunc.output + // Checks if the number of the aliases is equal to expected one + if (u.outputNames.size != outputAttrs.size) { + u.failAnalysis(s"expected ${outputAttrs.size} columns but " + + s"found ${u.outputNames.size} columns") + } + val aliases = outputAttrs.zip(u.outputNames).map { + case (attr, name) => Alias(attr, name)() + } + Project(aliases, resolvedFunc) + } else { + resolvedFunc + } } } http://git-wip-us.apache.org/repos/asf/spark/blob/714811d0/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala ---------------------------------------------------------------------- diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala index 262b894..51bef6e 100644 --- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala +++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala @@ -66,10 +66,16 @@ case class UnresolvedInlineTable( /** * A table-valued function, e.g. * {{{ - * select * from range(10); + * select id from range(10); + * + * // Assign alias names + * select t.a from range(10) t(a); * }}} */ -case class UnresolvedTableValuedFunction(functionName: String, functionArgs: Seq[Expression]) +case class UnresolvedTableValuedFunction( + functionName: String, + functionArgs: Seq[Expression], + outputNames: Seq[String]) extends LeafNode { override def output: Seq[Attribute] = Nil http://git-wip-us.apache.org/repos/asf/spark/blob/714811d0/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala ---------------------------------------------------------------------- diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala index d2a9b4a..e03fe2c 100644 --- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala +++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala @@ -687,7 +687,16 @@ class AstBuilder extends SqlBaseBaseVisitor[AnyRef] with Logging { */ override def visitTableValuedFunction(ctx: TableValuedFunctionContext) : LogicalPlan = withOrigin(ctx) { - UnresolvedTableValuedFunction(ctx.identifier.getText, ctx.expression.asScala.map(expression)) + val func = ctx.functionTable + val aliases = if (func.tableAlias.identifierList != null) { + visitIdentifierList(func.tableAlias.identifierList) + } else { + Seq.empty + } + + val tvf = UnresolvedTableValuedFunction( + func.identifier.getText, func.expression.asScala.map(expression), aliases) + tvf.optionalMap(func.tableAlias.identifier)(aliasPlan) } /** @@ -705,14 +714,14 @@ class AstBuilder extends SqlBaseBaseVisitor[AnyRef] with Logging { } } - val aliases = if (ctx.identifierList != null) { - visitIdentifierList(ctx.identifierList) + val aliases = if (ctx.tableAlias.identifierList != null) { + visitIdentifierList(ctx.tableAlias.identifierList) } else { Seq.tabulate(rows.head.size)(i => s"col${i + 1}") } val table = UnresolvedInlineTable(aliases, rows) - table.optionalMap(ctx.identifier)(aliasPlan) + table.optionalMap(ctx.tableAlias.identifier)(aliasPlan) } /** http://git-wip-us.apache.org/repos/asf/spark/blob/714811d0/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala ---------------------------------------------------------------------- diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala index 893bb1b..31047f6 100644 --- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala +++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala @@ -25,7 +25,6 @@ import org.apache.spark.sql.catalyst.TableIdentifier import org.apache.spark.sql.catalyst.dsl.expressions._ import org.apache.spark.sql.catalyst.dsl.plans._ import org.apache.spark.sql.catalyst.expressions._ -import org.apache.spark.sql.catalyst.parser.CatalystSqlParser import org.apache.spark.sql.catalyst.plans.Cross import org.apache.spark.sql.catalyst.plans.logical._ import org.apache.spark.sql.types._ @@ -441,4 +440,17 @@ class AnalysisSuite extends AnalysisTest with ShouldMatchers { checkAnalysis(SubqueryAlias("tbl", testRelation).as("tbl2"), testRelation) } + + test("SPARK-20311 range(N) as alias") { + def rangeWithAliases(args: Seq[Int], outputNames: Seq[String]): LogicalPlan = { + SubqueryAlias("t", UnresolvedTableValuedFunction("range", args.map(Literal(_)), outputNames)) + .select(star()) + } + assertAnalysisSuccess(rangeWithAliases(3 :: Nil, "a" :: Nil)) + assertAnalysisSuccess(rangeWithAliases(1 :: 4 :: Nil, "b" :: Nil)) + assertAnalysisSuccess(rangeWithAliases(2 :: 6 :: 2 :: Nil, "c" :: Nil)) + assertAnalysisError( + rangeWithAliases(3 :: Nil, "a" :: "b" :: Nil), + Seq("expected 1 columns but found 2 columns")) + } } http://git-wip-us.apache.org/repos/asf/spark/blob/714811d0/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/parser/PlanParserSuite.scala ---------------------------------------------------------------------- diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/parser/PlanParserSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/parser/PlanParserSuite.scala index 411777d..4c24762 100644 --- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/parser/PlanParserSuite.scala +++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/parser/PlanParserSuite.scala @@ -468,7 +468,18 @@ class PlanParserSuite extends PlanTest { test("table valued function") { assertEqual( "select * from range(2)", - UnresolvedTableValuedFunction("range", Literal(2) :: Nil).select(star())) + UnresolvedTableValuedFunction("range", Literal(2) :: Nil, Seq.empty).select(star())) + } + + test("SPARK-20311 range(N) as alias") { + assertEqual( + "select * from range(10) AS t", + SubqueryAlias("t", UnresolvedTableValuedFunction("range", Literal(10) :: Nil, Seq.empty)) + .select(star())) + assertEqual( + "select * from range(7) AS t(a)", + SubqueryAlias("t", UnresolvedTableValuedFunction("range", Literal(7) :: Nil, "a" :: Nil)) + .select(star())) } test("inline table") { --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@spark.apache.org For additional commands, e-mail: commits-h...@spark.apache.org
