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https://issues.apache.org/jira/browse/SPARK-28435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun updated SPARK-28435:
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Summary: Support accepting the interval keyword in the schema string (was:
Support cast StringType to IntervalType for SQL interface)
> Support accepting the interval keyword in the schema string
> -----------------------------------------------------------
>
> Key: SPARK-28435
> URL: https://issues.apache.org/jira/browse/SPARK-28435
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Yuming Wang
> Assignee: Yuming Wang
> Priority: Major
> Fix For: 3.0.0
>
>
> Scala interface support cast string to interval:
> {code:scala}
> import org.apache.spark.sql.types._
> import org.apache.spark.sql.catalyst.expressions._
> Cast(Literal("interval 3 month 1 hours"), CalendarIntervalType).eval()
> res0: Any = interval 3 months 1 hours
> {code}
> But SQL interface does not support it:
> {code:sql}
> scala> spark.sql("SELECT CAST('interval 3 month 1 hour' AS interval)").show
> org.apache.spark.sql.catalyst.parser.ParseException:
> DataType interval is not supported.(line 1, pos 41)
> == SQL ==
> SELECT CAST('interval 3 month 1 hour' AS interval)
> -----------------------------------------^^^
> at
> org.apache.spark.sql.catalyst.parser.AstBuilder.$anonfun$visitPrimitiveDataType$1(AstBuilder.scala:1931)
> at
> org.apache.spark.sql.catalyst.parser.ParserUtils$.withOrigin(ParserUtils.scala:108)
> at
> org.apache.spark.sql.catalyst.parser.AstBuilder.visitPrimitiveDataType(AstBuilder.scala:1909)
> at
> org.apache.spark.sql.catalyst.parser.AstBuilder.visitPrimitiveDataType(AstBuilder.scala:52)
> at
> org.apache.spark.sql.catalyst.parser.SqlBaseParser$PrimitiveDataTypeContext.accept(SqlBaseParser.java:15397)
> at
> org.apache.spark.sql.catalyst.parser.AstBuilder.typedVisit(AstBuilder.scala:58)
> at
> org.apache.spark.sql.catalyst.parser.AstBuilder.visitSparkDataType(AstBuilder.scala:1903)
> at
> org.apache.spark.sql.catalyst.parser.AstBuilder.$anonfun$visitCast$1(AstBuilder.scala:1334)
> {code}
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