bug fixed for 1) tddl insert merge, 2) slf4j dependency problem

src/main/java/com/alibaba/druid/sql/ast/statement/SQLExprTableSource.java

@@ -29,7 +29,7 @@ public class SQLExprTableSource extends SQLTableSourceImpl {
     }
 
     public SQLExprTableSource(SQLExpr expr){
-        this.expr = expr;
+        this.setExpr(expr);
     }
 
     public SQLExpr getExpr() {

src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlOutputVisitor.java

@@ -874,7 +874,7 @@ public class MySqlOutputVisitor extends SQLASTOutputVisitor implements MySqlASTV
 
         print("INTO ");
 
-        x.getTableName().accept(this);
+        x.getTableSource().accept(this);
 
         if (x.getColumns().size() > 0) {
             incrementIndent();

src/main/java/com/alibaba/druid/sql/dialect/mysql/visitor/MySqlParameterizedOutputVisitor.java

@@ -152,7 +152,7 @@ public class MySqlParameterizedOutputVisitor extends MySqlOutputVisitor {
 
         print("INTO ");
 
-        x.getTableName().accept(this);
+        x.getTableSource().accept(this);
 
         if (x.getColumns().size() > 0) {
             print(" (");

src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleOutputVisitor.java

@@ -1627,7 +1627,7 @@ public class OracleOutputVisitor extends SQLASTOutputVisitor implements OracleAS
     public boolean visit(InsertIntoClause x) {
         print("INTO ");
 
-        x.getTableName().accept(this);
+        x.getTableSource().accept(this);
 
         if (x.getColumns().size() > 0) {
             incrementIndent();

src/main/java/com/alibaba/druid/sql/dialect/postgresql/visitor/PGOutputVisitor.java

@@ -329,7 +329,7 @@ public class PGOutputVisitor extends SQLASTOutputVisitor implements PGASTVisitor
 
         print("INSERT INTO ");
 
-        x.getTableName().accept(this);
+        x.getTableSource().accept(this);
 
         if (x.getColumns().size() > 0) {
             incrementIndent();

src/main/java/com/alibaba/druid/sql/dialect/sqlserver/visitor/SQLServerOutputVisitor.java

@@ -124,7 +124,7 @@ public class SQLServerOutputVisitor extends SQLASTOutputVisitor implements SQLSe
     public boolean visit(SQLServerInsertStatement x) {
         print("INSERT INTO ");
 
-        x.getTableName().accept(this);
+        x.getTableSource().accept(this);
 
         if (x.getColumns().size() > 0) {
             incrementIndent();

src/main/java/com/alibaba/druid/sql/visitor/ParameterizedOutputVisitorUtils.java

@@ -39,11 +39,11 @@ public class ParameterizedOutputVisitorUtils {
     public static String parameterize(String sql, String dbType) {
         SQLStatementParser parser = SQLParserUtils.createSQLStatementParser(sql, dbType);
         List<SQLStatement> statementList = parser.parseStatementList();
-        SQLStatement statemen = statementList.get(0);
+        SQLStatement stmt = statementList.get(0);
 
         StringBuilder out = new StringBuilder();
         SQLASTOutputVisitor visitor = createParameterizedOutputVisitor(out, dbType);
-        statemen.accept(visitor);
+        stmt.accept(visitor);
 
         return out.toString();
     }

src/main/java/com/alibaba/druid/sql/visitor/SQLASTOutputVisitor.java

@@ -842,7 +842,7 @@ public class SQLASTOutputVisitor extends SQLASTVisitorAdapter {
     public boolean visit(SQLInsertStatement x) {
         print("INSERT INTO ");
 
-        x.getTableName().accept(this);
+        x.getTableSource().accept(this);
 
         if (x.getColumns().size() > 0) {
             incrementIndent();

src/main/java/com/alibaba/druid/support/logging/LogFactory.java

@@ -26,7 +26,7 @@ public class LogFactory {
         // TODO add slf4j logging
 
         // 优先选择log4j,而非Apache Common Logging. 因为后者无法设置真实Log调用者的信息
-		tryImplementation("org.slf4j.Logger", "com.alibaba.druid.support.logging.SLF4JImpl");
+        tryImplementation("org.slf4j.Logger", "com.alibaba.druid.support.logging.SLF4JImpl");
         tryImplementation("org.apache.log4j.Logger", "com.alibaba.druid.support.logging.Log4jImpl");
         tryImplementation("java.util.logging.Logger", "com.alibaba.druid.support.logging.Jdk14LoggingImpl");
         tryImplementation("org.apache.commons.logging.LogFactory",
@@ -57,6 +57,12 @@ public class LogFactory {
             if (!Log.class.isAssignableFrom(declareClass)) {
                 logConstructor = null;
             }
+
+            try {
+                logConstructor.newInstance(LogFactory.class);
+            } catch (Throwable t) {
+                logConstructor = null;
+            }
         } catch (Throwable t) {
             // skip
         }

src/main/java/com/alibaba/druid/support/logging/SLF4JImpl.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.alibaba.druid.support.logging;
 
 import org.slf4j.Logger;