1.fix KEY using btree not fit mysql 5.5 syntax,2.fix ALTER TABLE COLLATE bug,3.modify parse error info,like mysql

src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlCreateTableParser.java

@@ -609,11 +609,11 @@ public class MySqlCreateTableParser extends SQLCreateTableParser {
             MySqlKey key = new MySqlKey();
             key.setHasConstaint(hasConstaint);
 
-            if (identifierEquals("USING")) {
-                lexer.nextToken();
-                key.setIndexType(lexer.stringVal());
-                lexer.nextToken();
-            }
+//            if (identifierEquals("USING")) {
+//                lexer.nextToken();
+//                key.setIndexType(lexer.stringVal());
+//                lexer.nextToken();
+//            }
 
             if (lexer.token() == Token.IDENTIFIER) {
                 SQLName indexName = this.exprParser.name();
@@ -621,6 +621,13 @@ public class MySqlCreateTableParser extends SQLCreateTableParser {
                     key.setIndexName(indexName);
                 }
             }
+            
+            //5.5语法 USING BTREE 放在index 名字后
+            if (identifierEquals("USING")) {
+                lexer.nextToken();
+                key.setIndexType(lexer.stringVal());
+                lexer.nextToken();
+            }
 
             accept(Token.LPAREN);
             for (;;) {

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

@@ -388,12 +388,11 @@ public class MySqlOutputVisitor extends SQLASTOutputVisitor implements MySqlASTV
                 print(" COLLATE ");
                 print(x.getCollate());
             }
-        }
-        
-        if (x.getCollate() != null) {
+        }else if (x.getCollate() != null) {
             print(" COLLATE ");
             print(x.getCollate());
         }
+        
         return false;
     }
 

src/main/java/com/alibaba/druid/sql/parser/SQLParser.java

@@ -181,13 +181,39 @@ public class SQLParser {
         return alias;
     }
 
+    protected void printError(Token token){
+        String arround;
+        if (lexer.mark >= 0 && (lexer.text.length() > lexer.mark + 30)) {
+            if (lexer.mark - 5 > 0) {
+                arround = lexer.text.substring(lexer.mark - 5, lexer.mark + 30);
+            } else {
+                arround = lexer.text.substring(lexer.mark, lexer.mark + 30);
+            }
+
+        } else if (lexer.mark >= 0) {
+            if (lexer.mark - 5 > 0) {
+                arround = lexer.text.substring(lexer.mark - 5);
+            } else {
+                arround = lexer.text.substring(lexer.mark);
+            }
+        } else {
+            arround = lexer.text;
+        }
+        
+        // throw new
+        // ParserException("syntax error, error arround:'"+arround+"',expect "
+        // + token + ", actual " + lexer.token() + " "
+        // + lexer.stringVal() + ", pos " + this.lexer.pos());
+        throw new ParserException("syntax error, error in :'" + arround + "',expect " + token + ", actual "
+                                  + lexer.token() + " " + lexer.stringVal());
+    }
+    
     public void accept(Token token) {
         if (lexer.token() == token) {
             lexer.nextToken();
         } else {
             setErrorEndPos(lexer.pos());
-            throw new ParserException("syntax error, expect " + token + ", actual " + lexer.token() + " "
-                                        + lexer.stringVal() + ", pos " + this.lexer.pos());
+            printError(token);
         }
     }
 

src/main/java/com/alibaba/druid/sql/parser/SQLStatementParser.java

@@ -297,8 +297,10 @@ public class SQLStatementParser extends SQLParser {
                 continue;
             }
 
-            throw new ParserException("syntax error, " + lexer.token() + " " + lexer.stringVal() + ", pos "
-                                      + lexer.pos());
+            // throw new ParserException("syntax error, " + lexer.token() + " "
+            // + lexer.stringVal() + ", pos "
+            // + lexer.pos());
+            printError(lexer.token());
         }
     }