Merge pull request #12174 from dbeaver/mysqlDefColumn#10797

#10797 do not add "DEFAULT_GENERATED" to the alter column statement

plugins/org.jkiss.dbeaver.ext.mysql/src/org/jkiss/dbeaver/ext/mysql/MySQLConstants.java

@@ -220,4 +220,5 @@ public class MySQLConstants {
     public static final String FLAG_VERSION = "-V";
 
     public static final String EXTRA_INFO_VIRTUAL_GENERATED = "VIRTUAL GENERATED";
+    public static final String EXTRA_INFO_DEFAULT_GENERATED = "DEFAULT_GENERATED";
 }

plugins/org.jkiss.dbeaver.ext.mysql/src/org/jkiss/dbeaver/ext/mysql/edit/MySQLTableColumnManager.java

@@ -82,15 +82,18 @@ public class MySQLTableColumnManager extends SQLTableColumnManager<MySQLTableCol
     };
 
     private final ColumnModifier<MySQLTableColumn> ExtraInfoModifier = (monitor, column, sql, command) -> {
-        if (!CommonUtils.isEmpty(column.getExtraInfo())) {
-            if (MySQLConstants.EXTRA_INFO_VIRTUAL_GENERATED.equalsIgnoreCase(column.getExtraInfo())) {
+        String extraInfo = column.getExtraInfo();
+        if (!CommonUtils.isEmpty(extraInfo)) {
+            if (MySQLConstants.EXTRA_INFO_VIRTUAL_GENERATED.equalsIgnoreCase(extraInfo)) {
                 if (!CommonUtils.isEmpty(column.getGenExpression())) {
                     sql.append(" GENERATED ALWAYS AS (").append(column.getGenExpression()).append(") VIRTUAL"); //$NON-NLS-1$ //$NON-NLS-2$
                 } else {
                     log.debug("No virtual column generate expression found for " + column.getName());
                 }
+            } else if (MySQLConstants.EXTRA_INFO_DEFAULT_GENERATED.equals(extraInfo)) {
+                // Do not add "DEFAULT_GENERATED" to the statement. It caused MySQLSyntaxErrorException. See #10797
             } else {
-                sql.append(" ").append(column.getExtraInfo()); //$NON-NLS-1$
+                sql.append(" ").append(extraInfo); //$NON-NLS-1$
             }
         }
     };