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[SPARK-49013] Change key in collationsMap for Map and Array types in scala #47497

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[SPARK-49013] Change key in collationsMap for Map and Array types in scala #47497

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13 changes: 10 additions & 3 deletions sql/api/src/main/scala/org/apache/spark/sql/types/DataType.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -223,7 +223,7 @@ object DataType {
("elementType", t: JValue),
("type", JString("array"))) =>
assertValidTypeForCollations(fieldPath, "array", collationsMap)
val elementType = parseDataType(t, fieldPath + ".element", collationsMap)
val elementType = parseDataType(t, appendFieldToPath(fieldPath, "element"), collationsMap)
ArrayType(elementType, n)

case JSortedObject(
Expand All @@ -232,8 +232,8 @@ object DataType {
("valueContainsNull", JBool(n)),
("valueType", v: JValue)) =>
assertValidTypeForCollations(fieldPath, "map", collationsMap)
val keyType = parseDataType(k, fieldPath + ".key", collationsMap)
val valueType = parseDataType(v, fieldPath + ".value", collationsMap)
val keyType = parseDataType(k, appendFieldToPath(fieldPath, "key"), collationsMap)
val valueType = parseDataType(v, appendFieldToPath(fieldPath, "value"), collationsMap)
MapType(keyType, valueType, n)

case JSortedObject(
Expand Down Expand Up @@ -304,6 +304,13 @@ object DataType {
}
}

/**
* Appends a field name to a given path, using a dot separator if the path is not empty.
*/
private def appendFieldToPath(basePath: String, fieldName: String): String = {
if (basePath.isEmpty) fieldName else s"$basePath.$fieldName"
}

/**
* Returns a map of field path to collation name.
*/
Expand Down
45 changes: 45 additions & 0 deletions sql/catalyst/src/test/scala/org/apache/spark/sql/types/DataTypeSuite.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@
package org.apache.spark.sql.types

import com.fasterxml.jackson.core.JsonParseException
import org.json4s.jackson.JsonMethods

import org.apache.spark.{SparkException, SparkFunSuite, SparkIllegalArgumentException}
import org.apache.spark.sql.catalyst.analysis.{caseInsensitiveResolution, caseSensitiveResolution}
Expand Down Expand Up @@ -1001,6 +1002,50 @@ class DataTypeSuite extends SparkFunSuite {
)
}

test("parse array type with collation metadata") {
val unicodeCollationId = CollationFactory.collationNameToId("UNICODE")
val arrayJson =
s"""
|{
| "type": "array",
| "elementType": "string",
| "containsNull": true
|}
|""".stripMargin

val collationsMap = Map("element" -> "UNICODE")

// Parse without collations map
assert(DataType.parseDataType(JsonMethods.parse(arrayJson)) === ArrayType(StringType))

val parsedWithCollations = DataType.parseDataType(
JsonMethods.parse(arrayJson), collationsMap = collationsMap)
assert(parsedWithCollations === ArrayType(StringType(unicodeCollationId)))
}

test("parse map type with collation metadata") {
val unicodeCollationId = CollationFactory.collationNameToId("UNICODE")
val mapJson =
s"""
|{
| "type": "map",
| "keyType": "string",
| "valueType": "string",
| "valueContainsNull": true
|}
|""".stripMargin

val collationsMap = Map("key" -> "UNICODE", "value" -> "UNICODE")

// Parse without collations map
assert(DataType.parseDataType(JsonMethods.parse(mapJson)) === MapType(StringType, StringType))

val parsedWithCollations = DataType.parseDataType(
JsonMethods.parse(mapJson), collationsMap = collationsMap)
assert(parsedWithCollations ===
MapType(StringType(unicodeCollationId), StringType(unicodeCollationId)))
}

test("SPARK-48680: Add CharType and VarcharType to DataTypes JAVA API") {
assert(DataTypes.createCharType(1) === CharType(1))
assert(DataTypes.createVarcharType(100) === VarcharType(100))
Expand Down