#906 JDBC 4.5 compat: use type code 2016 for DECFLOAT

Author: mrotteveel

src/main/org/firebirdsql/jdbc/JaybirdType.java

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2018-2022 Mark Rotteveel
+// SPDX-FileCopyrightText: Copyright 2018-2026 Mark Rotteveel
 // SPDX-License-Identifier: LGPL-2.1-or-later OR BSD-3-Clause
 package org.firebirdsql.jdbc;
 
@@ -14,7 +14,14 @@
 @Volatile(reason = "Defined types may receive a different type number when standardized in JDBC")
 public enum JaybirdType implements SQLType {
 
-    @Volatile(reason = "To be standardized by future version of JDBC, will be deprecated")
+    /**
+     * Type for {@code DECFLOAT}.
+     * <p>
+     * When using Java 26 or higher, use {@code java.sql.JDBCType.DECFLOAT}. This constant might be deprecated and
+     * removed once Jaybird only supports versions after Java 26.
+     * </p>
+     */
+    @Volatile(reason = "Prefer java.sql.JDBCType.DECFLOAT when using Java 26 or higher")
     DECFLOAT(JaybirdTypeCodes.DECFLOAT);
 
     private final Integer type;

src/main/org/firebirdsql/jdbc/JaybirdTypeCodes.java

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2018-2020 Mark Rotteveel
+// SPDX-FileCopyrightText: Copyright 2018-2026 Mark Rotteveel
 // SPDX-License-Identifier: LGPL-2.1-or-later OR BSD-3-Clause
 package org.firebirdsql.jdbc;
 
@@ -12,10 +12,15 @@
 @Volatile(reason = "Defined type codes may receive a different value when standardized in JDBC")
 public final class JaybirdTypeCodes {
 
-    // TODO Remove when standardized in JDBC
-
-    @Volatile(reason = "To be standardized by future version of JDBC, type code may change")
-    public static final int DECFLOAT = -6001;
+    /**
+     * Type code for {@code DECFLOAT}.
+     * <p>
+     * When using Java 26 or higher, use {@code java.sql.Types.DECFLOAT}. This constant might be deprecated and
+     * removed once Jaybird only supports versions after Java 26.
+     * </p>
+     */
+    @Volatile(reason = "Type code changed in 5.0.12/6.0.5/7.0.0 to match JDBC 4.5 value; prefer java.sql.Types.DECFLOAT when using Java 26 or higher")
+    public static final int DECFLOAT = 2015;
 
     private JaybirdTypeCodes() {
         // no instances