make jarmonicaDown Available

build.gradle

@@ -57,7 +57,7 @@ task javadocJar(type: Jar) {
 }
 
 group 'com.improve_future'
-version '1.1.23'
+version '1.1.24'
 
 apply plugin: "com.gradle.plugin-publish"
 apply plugin: 'kotlin'

src/main/kotlin/com/improve_future/harmonica/core/adapter/DbAdapter.kt

@@ -40,7 +40,7 @@ internal abstract class DbAdapter(private val connection: ConnectionInterface) {
     abstract fun createTable(tableName: String, tableBuilder: TableBuilder)
 
     fun dropTable(tableName: String) {
-        execute("DROP TABLE $tableName;")
+        execute("DROP TABLE $tableName")
     }
 
     abstract fun createIndex(

src/main/kotlin/com/improve_future/harmonica/service/VersionService.kt

@@ -20,6 +20,7 @@ package com.improve_future.harmonica.service
 
 import com.improve_future.harmonica.core.AbstractMigration
 import com.improve_future.harmonica.core.Connection
+import com.improve_future.harmonica.core.Dbms
 import java.nio.file.Paths
 import java.sql.ResultSet
 import java.sql.Statement
@@ -86,13 +87,24 @@ class VersionService(private val migrationTableName: String) {
 
         val statement = connection.createStatement()
         try {
-            val resultSet = statement.executeQuery(
-                """
-                SELECT version
-                  FROM $migrationTableName
-                 ORDER BY version DESC
-                 LIMIT 1""".trimIndent()
-            )
+            val resultSet: ResultSet
+            when (connection.config.dbms) {
+                Dbms.Oracle -> {
+                    resultSet = statement.executeQuery("""
+                        SELECT version
+                          FROM $migrationTableName
+                         ORDER BY version DESC
+                         FETCH FIRST 1 ROWS ONLY""".trimIndent())
+                }
+                else -> {
+                    resultSet = statement.executeQuery("""
+                        SELECT version
+                          FROM $migrationTableName
+                         ORDER BY version DESC
+                         LIMIT 1""".trimIndent())
+                }
+            }
+
             if (resultSet.next()) result = resultSet.getString(1)
             resultSet.close()
             statement.close()