fixes #812

Author: wumpz

src/main/java/net/sf/jsqlparser/schema/Table.java

@@ -64,7 +64,9 @@ public Database getDatabase() {
 
     public void setDatabase(Database database) {
         setIndex(DATABASE_IDX, database.getDatabaseName());
-        setIndex(SERVER_IDX, database.getServer().getFullyQualifiedName());
+        if (database.getServer() != null) {
+            setIndex(SERVER_IDX, database.getServer().getFullyQualifiedName());
+        }
     }
 
     public String getSchemaName() {
@@ -113,7 +115,7 @@ private String getIndex(int idx) {
     public String getFullyQualifiedName() {
         StringBuilder fqn = new StringBuilder();
 
-        for (int i = partItems.size()-1 ; i >=0; i--) {
+        for (int i = partItems.size() - 1; i >= 0; i--) {
             String part = partItems.get(i);
             if (part == null) {
                 part = "";
@@ -162,4 +164,3 @@ public String toString() {
                 + ((hint != null) ? hint.toString() : "");
     }
 }
-

src/test/java/net/sf/jsqlparser/schema/TableTest.java

@@ -7,26 +7,15 @@
  * Dual licensed under GNU LGPL 2.1 or Apache License 2.0
  * #L%
  */
-/*
- * Copyright (C) 2019 JSQLParser.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
- * MA 02110-1301  USA
- */
 package net.sf.jsqlparser.schema;
 
+import net.sf.jsqlparser.JSQLParserException;
+import net.sf.jsqlparser.parser.CCJSqlParserUtil;
+import net.sf.jsqlparser.statement.select.PlainSelect;
+import net.sf.jsqlparser.statement.select.Select;
+import net.sf.jsqlparser.util.deparser.ExpressionDeParser;
+import net.sf.jsqlparser.util.deparser.SelectDeParser;
+import static org.junit.Assert.assertEquals;
 import org.junit.Test;
 
 /**
@@ -42,4 +31,35 @@ public void tableIndexException() {
         table.setDatabase(new Database(new Server("server", "instance"), "db"));
     }
 
+    @Test
+    public void tableSetDatabase() {
+        Table table = new Table();
+        table.setName("testtable");
+        Database database = new Database("default");
+        table.setDatabase(database);
+        assertEquals("default..testtable", table.toString());
+    }
+
+    @Test
+    public void tableSetDatabaseIssue812() throws JSQLParserException {
+        String sql = "SELECT * FROM MY_TABLE1 as T1, MY_TABLE2, (SELECT * FROM MY_DB.TABLE3) LEFT OUTER JOIN MY_TABLE4 "
+                + " WHERE ID = (SELECT MAX(ID) FROM MY_TABLE5) AND ID2 IN (SELECT * FROM MY_TABLE6)";
+
+        Select select = (Select) CCJSqlParserUtil.parse(sql);
+        StringBuilder buffer = new StringBuilder();
+        ExpressionDeParser expressionDeParser = new ExpressionDeParser();
+        final Database database = new Database("default");
+        SelectDeParser deparser = new SelectDeParser(expressionDeParser, buffer) {
+
+            @Override
+            public void visit(Table tableName) {
+                System.out.println(tableName);
+                tableName.setDatabase(database); // Exception
+                System.out.println(tableName.getDatabase());
+            }
+        };
+
+        deparser.visit((PlainSelect) select.getSelectBody());
+
+    }
 }