dongjoon-hyun commented on code in PR #49340:
URL: https://github.com/apache/spark/pull/49340#discussion_r1912532289
##########
sql/core/src/test/scala/org/apache/spark/sql/CharVarcharTestSuite.scala:
##########
@@ -695,6 +695,89 @@ trait CharVarcharTestSuite extends QueryTest with
SQLTestUtils {
}
}
}
+
+ test(s"insert string literal into char/varchar column when " +
+ s"${SQLConf.PRESERVE_CHAR_VARCHAR_TYPE_INFO.key} is true") {
+ withSQLConf(SQLConf.PRESERVE_CHAR_VARCHAR_TYPE_INFO.key -> "true") {
+ withTable("t") {
+ sql(s"CREATE TABLE t(c1 CHAR(5), c2 VARCHAR(5)) USING $format")
+ sql("INSERT INTO t VALUES ('1234', '1234')")
+ checkAnswer(spark.table("t"), Row("1234 ", "1234"))
+ assertLengthCheckFailure("INSERT INTO t VALUES ('123456', '1')")
+ assertLengthCheckFailure("INSERT INTO t VALUES ('1', '123456')")
+ }
+ }
+ }
+
+ test(s"insert from string column into char/varchar column when " +
+ s"${SQLConf.PRESERVE_CHAR_VARCHAR_TYPE_INFO.key} is true") {
+ withSQLConf(SQLConf.PRESERVE_CHAR_VARCHAR_TYPE_INFO.key -> "true") {
+ withTable("a", "b") {
+ sql(s"CREATE TABLE a AS SELECT '1234' as c1, '1234' as c2")
+ sql(s"CREATE TABLE b(c1 CHAR(5), c2 VARCHAR(5)) USING $format")
+ sql("INSERT INTO b SELECT * FROM a")
+ checkAnswer(spark.table("b"), Row("1234 ", "1234"))
+ spark.table("b").show()
+ }
+ }
+ }
+
+ test(s"cast from char/varchar when
${SQLConf.PRESERVE_CHAR_VARCHAR_TYPE_INFO.key} is true") {
+ withSQLConf(SQLConf.PRESERVE_CHAR_VARCHAR_TYPE_INFO.key -> "true") {
+ Seq("char(5)", "varchar(5)").foreach { typ =>
+ Seq(
+ "int" -> ("123", 123),
+ "long" -> ("123 ", 123L),
+ "boolean" -> ("true ", true),
+ "boolean" -> ("false", false),
+ "double" -> ("1.2", 1.2)
+ ).foreach { case (toType, (from, to)) =>
+ assert(sql(s"select cast($from :: $typ as $toType)").collect() ===
Array(Row(to)))
+ }
+ }
+ }
+ }
+
+ test(s"cast to char/varchar when
${SQLConf.PRESERVE_CHAR_VARCHAR_TYPE_INFO.key} is true") {
+ withSQLConf(SQLConf.PRESERVE_CHAR_VARCHAR_TYPE_INFO.key -> "true") {
+ Seq("char(10)", "varchar(10)").foreach { typ =>
+ Seq(
+ 123 -> "123",
+ 123L-> "123",
+ true -> "true",
+ false -> "false",
+ 1.2 -> "1.2"
+ ).foreach { case (from, to) =>
+ val paddedTo = if (typ == "char(10)") {
+ to.padTo(10, ' ')
+ } else {
+ to
+ }
+ sql(s"select cast($from as $typ)").collect() === Array(Row(paddedTo))
+ }
+ }
+ }
+ }
+
+ test("implicitly cast char/varchar into atomics") {
Review Comment:
This test case seems to be the root cause.
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