[SPARK-50707][SQL] Enable casting to/from char/varchar #49340
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mihailom-db
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sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ToPrettyStringSuite.scala
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...alyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/resolver/PredicateResolver.scala
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sql/api/src/main/scala/org/apache/spark/sql/catalyst/util/SparkCharVarcharUtils.scala
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HyukjinKwon
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mihailom-db
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Jan 3, 2025
| return None | ||
| } | ||
| if (!SqlApiConf.get.preserveCharVarcharTypeInfo) { | ||
| return Some(StringType(s1.collationId)) |
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Why not just return s2 as previous behaviour here?
mihailom-db
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mihailom-db
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercionBase.scala
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ToStringBase.scala
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/CharVarcharUtils.scala
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mihailom-db
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/CharVarcharUtils.scala
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What changes were proposed in this pull request?
Enable casting to/from char/varchar.
Why are the changes needed?
Currently
castdoes not work correctly. It always casts toStringType. This PR enables casting toCharTypeandVarcharType. This only applies whenspark.sql.preserveCharVarcharTypeInfois set totrue.Does this PR introduce any user-facing change?
No.
How was this patch tested?
Added tests in:
CharVarcharTestSuiteCastSuiteBaseWas this patch authored or co-authored using generative AI tooling?
No.