[SPARK-20962][SQL] Support subquery column aliases in FROM clause
## What changes were proposed in this pull request? This pr added parsing rules to support subquery column aliases in FROM clause. This pr is a sub-task of #18079. ## How was this patch tested? Added tests in `PlanParserSuite` and `SQLQueryTestSuite`. Author: Takeshi Yamamuro <yamamuro@apache.org> Closes #18185 from maropu/SPARK-20962.
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- sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4 1 addition, 1 deletion...in/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala 25 additions, 0 deletions...ala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala 22 additions, 1 deletion...a/org/apache/spark/sql/catalyst/analysis/unresolved.scala
- sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala 13 additions, 5 deletions...ala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
- sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala 20 additions, 0 deletions...rg/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
- sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/parser/PlanParserSuite.scala 12 additions, 1 deletion...rg/apache/spark/sql/catalyst/parser/PlanParserSuite.scala
- sql/core/src/test/resources/sql-tests/inputs/table-aliases.sql 3 additions, 0 deletions...ore/src/test/resources/sql-tests/inputs/table-aliases.sql
- sql/core/src/test/resources/sql-tests/results/table-aliases.sql.out 9 additions, 1 deletion...rc/test/resources/sql-tests/results/table-aliases.sql.out
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