yaooqinn commented on a change in pull request #26537: [SPARK-29587][SQL]
Support SQL Standard type real as float(4) numeric as decimal
URL: https://github.com/apache/spark/pull/26537#discussion_r346881817
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
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@@ -2154,17 +2154,17 @@ class AstBuilder(conf: SQLConf) extends
SqlBaseBaseVisitor[AnyRef] with Logging
case ("smallint" | "short", Nil) => ShortType
case ("int" | "integer", Nil) => IntegerType
case ("bigint" | "long", Nil) => LongType
- case ("float", Nil) => FloatType
+ case ("float" | "real", Nil) => FloatType
Review comment:
3. prestosql
https://prestosql.io/docs/current/language/types.html#floating-point
> REAL
>> A real is a 32-bit inexact, variable-precision implementing the IEEE
Standard 754 for Binary Floating-Point Arithmetic.
> DECIMAL
>> A fixed precision decimal number. Precision up to 38 digits is supported
but performance is best up to 18 digits.
No documentation found about numeric type
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