fix: EXPOSED-263 Null arg parameter in exec() throws if logger enabled

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

@@ -206,7 +206,11 @@ open class Transaction(
 
             override fun prepareSQL(transaction: Transaction, prepared: Boolean): String = stmt
 
-            override fun arguments(): Iterable<Iterable<Pair<IColumnType, Any?>>> = listOf(args)
+            override fun arguments(): Iterable<Iterable<Pair<IColumnType, Any?>>> = listOf(
+                args.map { (columnType, value) ->
+                    columnType.apply { nullable = true } to value
+                }
+            )
         })
     }
 

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

@@ -10,10 +10,11 @@ import org.jetbrains.exposed.sql.transactions.transaction
 import org.junit.Assume
 import org.junit.Test
 import kotlin.test.assertNotNull
+import kotlin.test.assertNull
 
 class ParameterizationTests : DatabaseTestsBase() {
     object TempTable : Table("tmp") {
-        val name = varchar("foo", 50)
+        val name = varchar("foo", 50).nullable()
     }
 
     private val supportMultipleStatements by lazy {
@@ -146,4 +147,19 @@ class ParameterizationTests : DatabaseTestsBase() {
 
         TransactionManager.closeAndUnregister(db)
     }
+
+    @Test
+    fun testNullParameterWithLogger() {
+        withTables(TempTable) {
+            // the logger is left in to test that it does not throw IllegalStateException with null parameter arg
+            addLogger(StdOutSqlLogger)
+
+            exec(
+                stmt = "INSERT INTO ${TempTable.tableName} (${TempTable.name.name}) VALUES (?)",
+                args = listOf(VarCharColumnType() to null)
+            )
+
+            assertNull(TempTable.selectAll().single()[TempTable.name])
+        }
+    }
 }

exposed-tests/src/test/kotlin/org/jetbrains/exposed/sql/tests/shared/ddl/SequencesTests.kt

@@ -86,7 +86,6 @@ class SequencesTests : DatabaseTestsBase() {
     fun `test insert LongIdTable with auth-increment with sequence`() {
         withDb {
             if (currentDialectTest.supportsSequenceAsGeneratedKeys) {
-                addLogger(StdOutSqlLogger)
                 try {
                     SchemaUtils.create(DeveloperWithAutoIncrementBySequence)
                     val developerId = DeveloperWithAutoIncrementBySequence.insertAndGetId {