fix: EXPOSED-339 Oracle alias for blob does not work

exposed-core/src/main/kotlin/org/jetbrains/exposed/sql/ColumnType.kt

@@ -779,6 +779,7 @@ class BlobColumnType(
         is ExposedBlob -> value
         is InputStream -> ExposedBlob(value)
         is ByteArray -> ExposedBlob(value)
+        is Blob -> ExposedBlob(value.binaryStream)
         else -> error("Unexpected value of type Blob: $value of ${value::class.qualifiedName}")
     }
 

exposed-tests/src/test/kotlin/org/jetbrains/exposed/sql/tests/shared/types/BlobColumnTypeTests.kt

@@ -0,0 +1,30 @@
+package org.jetbrains.exposed.sql.tests.shared.types
+
+import junit.framework.TestCase.assertEquals
+import org.jetbrains.exposed.dao.id.IntIdTable
+import org.jetbrains.exposed.sql.alias
+import org.jetbrains.exposed.sql.insert
+import org.jetbrains.exposed.sql.statements.api.ExposedBlob
+import org.jetbrains.exposed.sql.tests.DatabaseTestsBase
+import org.junit.Test
+import java.nio.charset.Charset
+
+class BlobColumnTypeTests : DatabaseTestsBase() {
+    object BlobTable : IntIdTable("test-blob") {
+        val content = blob("content")
+    }
+
+    @Test
+    fun testWriteAndReadBlobValueViaAlias() {
+        withTables(BlobTable) {
+            val sampleData = "test-sample-data"
+            BlobTable.insert {
+                it[content] = ExposedBlob(sampleData.toByteArray())
+            }
+
+            val alias = BlobTable.content.alias("content_column")
+            val content = BlobTable.select(alias).single()[alias].bytes.toString(Charset.defaultCharset())
+            assertEquals(content, sampleData)
+        }
+    }
+}