diff --git a/jOOQ/src/main/java/org/jooq/impl/AlterTableImpl.java b/jOOQ/src/main/java/org/jooq/impl/AlterTableImpl.java
index f93011d557..3eb1cf8c8a 100644
--- a/jOOQ/src/main/java/org/jooq/impl/AlterTableImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/AlterTableImpl.java
@@ -76,7 +76,6 @@ import static org.jooq.impl.Keywords.K_EXEC;
 import static org.jooq.impl.Keywords.K_IF_EXISTS;
 import static org.jooq.impl.Keywords.K_MODIFY;
 import static org.jooq.impl.Keywords.K_NOT_NULL;
-import static org.jooq.impl.Keywords.K_NULL;
 import static org.jooq.impl.Keywords.K_RENAME_COLUMN;
 import static org.jooq.impl.Keywords.K_RENAME_CONSTRAINT;
 import static org.jooq.impl.Keywords.K_RENAME_INDEX;
@@ -88,6 +87,7 @@ import static org.jooq.impl.Keywords.K_TO;
 import static org.jooq.impl.Keywords.K_TYPE;
 import static org.jooq.impl.Keywords.K_USING_INDEX;
 import static org.jooq.impl.Tools.toSQLDDLTypeDeclaration;
+import static org.jooq.impl.Tools.toSQLDDLTypeDeclarationForAddition;
 import static org.jooq.impl.Tools.DataKey.DATA_CONSTRAINT_REFERENCE;
 
 import org.jooq.AlterTableAlterStep;
@@ -619,15 +619,7 @@ final class AlterTableImpl extends AbstractQuery implements
                .visit(addColumn).sql(' ')
                .qualify(qualify);
 
-            toSQLDDLTypeDeclaration(ctx, addColumnType);
-
-            if (!addColumnType.nullable())
-                ctx.sql(' ').visit(K_NOT_NULL);
-
-            // Some databases default to NOT NULL, so explicitly setting columns to NULL is mostly required here
-            // [#3400] [#4321] ... but not in Derby, Firebird
-            else if (!asList(DERBY, FIREBIRD).contains(family))
-                ctx.sql(' ').visit(K_NULL);
+            toSQLDDLTypeDeclarationForAddition(ctx, addColumnType);
 
 
 
diff --git a/jOOQ/src/main/java/org/jooq/impl/CreateTableImpl.java b/jOOQ/src/main/java/org/jooq/impl/CreateTableImpl.java
index 0dc5d88cab..28463b90f5 100644
--- a/jOOQ/src/main/java/org/jooq/impl/CreateTableImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/CreateTableImpl.java
@@ -57,18 +57,12 @@ import static org.jooq.impl.DSL.field;
 import static org.jooq.impl.DSL.insertInto;
 import static org.jooq.impl.DSL.name;
 import static org.jooq.impl.Keywords.K_AS;
-import static org.jooq.impl.Keywords.K_AUTO_INCREMENT;
 import static org.jooq.impl.Keywords.K_BEGIN;
 import static org.jooq.impl.Keywords.K_CREATE;
-import static org.jooq.impl.Keywords.K_DEFAULT;
 import static org.jooq.impl.Keywords.K_END;
 import static org.jooq.impl.Keywords.K_EXECUTE_IMMEDIATE;
-import static org.jooq.impl.Keywords.K_GENERATED_BY_DEFAULT_AS_IDENTITY;
 import static org.jooq.impl.Keywords.K_GLOBAL_TEMPORARY;
-import static org.jooq.impl.Keywords.K_IDENTITY;
 import static org.jooq.impl.Keywords.K_IF_NOT_EXISTS;
-import static org.jooq.impl.Keywords.K_NOT_NULL;
-import static org.jooq.impl.Keywords.K_NULL;
 import static org.jooq.impl.Keywords.K_ON_COMMIT_DELETE_ROWS;
 import static org.jooq.impl.Keywords.K_ON_COMMIT_DROP;
 import static org.jooq.impl.Keywords.K_ON_COMMIT_PRESERVE_ROWS;
@@ -269,40 +263,7 @@ final class CreateTableImpl<R extends Record> extends AbstractQuery implements
 
                 ctx.visit(columnFields.get(i))
                    .sql(' ');
-                Tools.toSQLDDLTypeDeclaration(ctx, type);
-
-                // [#5356] Some dialects require the DEFAULT clause prior to the
-                //         NULL constraints clause
-                if (asList(HSQLDB).contains(ctx.family()))
-                    acceptDefault(ctx, type);
-
-                if (type.nullable()) {
-
-                    // [#4321] Not all dialects support explicit NULL type declarations
-                    if (!asList(DERBY, FIREBIRD).contains(ctx.family()))
-                        ctx.sql(' ').visit(K_NULL);
-                }
-                else {
-                    ctx.sql(' ').visit(K_NOT_NULL);
-                }
-
-                if (type.identity()) {
-
-                    // [#5062] H2's (and others') AUTO_INCREMENT flag is syntactically located *after* NULL flags.
-                    switch (ctx.family()) {
-
-
-
-
-
-                        case H2:
-                        case MARIADB:
-                        case MYSQL:  ctx.sql(' ').visit(K_AUTO_INCREMENT); break;
-                    }
-                }
-
-                if (!asList(HSQLDB).contains(ctx.family()))
-                    acceptDefault(ctx, type);
+                Tools.toSQLDDLTypeDeclarationForAddition(ctx, type);
 
                 if (i < columnFields.size() - 1)
                     ctx.sql(',').formatSeparator();
@@ -328,11 +289,6 @@ final class CreateTableImpl<R extends Record> extends AbstractQuery implements
         }
     }
 
-    private final void acceptDefault(Context<?> ctx, DataType<?> type) {
-        if (type.defaulted())
-            ctx.sql(' ').visit(K_DEFAULT).sql(' ').visit(type.defaultValue());
-    }
-
     private final void acceptCreateTableAsSelect(Context<?> ctx) {
         ctx.start(CREATE_TABLE);
         toSQLCreateTableName(ctx);
diff --git a/jOOQ/src/main/java/org/jooq/impl/Tools.java b/jOOQ/src/main/java/org/jooq/impl/Tools.java
index e383eb3d31..3b0acebdc8 100644
--- a/jOOQ/src/main/java/org/jooq/impl/Tools.java
+++ b/jOOQ/src/main/java/org/jooq/impl/Tools.java
@@ -40,6 +40,9 @@ import static java.util.Arrays.asList;
 // ...
 // ...
 import static org.jooq.SQLDialect.CUBRID;
+import static org.jooq.SQLDialect.DERBY;
+import static org.jooq.SQLDialect.FIREBIRD;
+import static org.jooq.SQLDialect.HSQLDB;
 import static org.jooq.SQLDialect.MARIADB;
 import static org.jooq.SQLDialect.MYSQL;
 // ...
@@ -84,6 +87,7 @@ import static org.jooq.impl.Keywords.K_BEGIN;
 import static org.jooq.impl.Keywords.K_BEGIN_CATCH;
 import static org.jooq.impl.Keywords.K_BEGIN_TRY;
 import static org.jooq.impl.Keywords.K_DECLARE;
+import static org.jooq.impl.Keywords.K_DEFAULT;
 import static org.jooq.impl.Keywords.K_DO;
 import static org.jooq.impl.Keywords.K_ELSE;
 import static org.jooq.impl.Keywords.K_END;
@@ -105,6 +109,7 @@ import static org.jooq.impl.Keywords.K_IN;
 import static org.jooq.impl.Keywords.K_INT;
 import static org.jooq.impl.Keywords.K_LIKE;
 import static org.jooq.impl.Keywords.K_LOOP;
+import static org.jooq.impl.Keywords.K_NOT_NULL;
 import static org.jooq.impl.Keywords.K_NULL;
 import static org.jooq.impl.Keywords.K_NVARCHAR;
 import static org.jooq.impl.Keywords.K_RAISE;
@@ -3529,6 +3534,47 @@ final class Tools {
         }
     }
 
+    static final void toSQLDDLTypeDeclarationForAddition(Context<?> ctx, DataType<?> type) {
+        toSQLDDLTypeDeclaration(ctx, type);
+
+        // [#5356] Some dialects require the DEFAULT clause prior to the
+        //         NULL constraints clause
+        if (asList(HSQLDB).contains(ctx.family()))
+            toSQLDDLTypeDeclarationDefault(ctx, type);
+
+        if (!type.nullable())
+            ctx.sql(' ').visit(K_NOT_NULL);
+
+            // Some databases default to NOT NULL, so explicitly setting columns to NULL is mostly required here
+            // [#3400] [#4321] ... but not in Derby, Firebird
+        else if (!asList(DERBY, FIREBIRD).contains(ctx.family()))
+            ctx.sql(' ').visit(K_NULL);
+
+        if (type.identity()) {
+
+            // [#5062] H2's (and others') AUTO_INCREMENT flag is syntactically located *after* NULL flags.
+            switch (ctx.family()) {
+
+
+
+
+
+                case H2:
+                case MARIADB:
+                case MYSQL:  ctx.sql(' ').visit(K_AUTO_INCREMENT); break;
+            }
+        }
+
+        if (!asList(HSQLDB).contains(ctx.family()))
+            toSQLDDLTypeDeclarationDefault(ctx, type);
+    }
+
+    private static final void toSQLDDLTypeDeclarationDefault(Context<?> ctx, DataType<?> type) {
+        if (type.defaulted())
+            ctx.sql(' ').visit(K_DEFAULT).sql(' ').visit(type.defaultValue());
+    }
+
+
     static final void toSQLDDLTypeDeclaration(Context<?> ctx, DataType<?> type) {
         String typeName = type.getTypeName(ctx.configuration());