improve wall filter

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

@@ -47,6 +47,7 @@ public class MySqlLexer extends Lexer {
         map.put("LIMIT", Token.LIMIT);
         map.put("TRUE", Token.TRUE);
         map.put("BINARY", Token.BINARY);
+        map.put("SHOW", Token.SHOW);
 
         DEFAULT_MYSQL_KEYWORDS = new Keywords(map);
     }

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

@@ -173,7 +173,6 @@ public class MySqlStatementParser extends SQLStatementParser {
     private static final String USER           = "USER";
     private static final String SPATIAL        = "SPATIAL";
     private static final String FULLTEXT       = "FULLTEXT";
-    private static final String REPLACE        = "REPLACE";
     private static final String DELAYED        = "DELAYED";
     private static final String LOW_PRIORITY   = "LOW_PRIORITY";
 
@@ -306,7 +305,7 @@ public class MySqlStatementParser extends SQLStatementParser {
         boolean replace = false;
         if (lexer.token() == Token.OR) {
             lexer.nextToken();
-            acceptIdentifier("REPLACE");
+            accept(Token.REPLACE);
             replace = true;
         }
 
@@ -544,7 +543,7 @@ public class MySqlStatementParser extends SQLStatementParser {
             return true;
         }
 
-        if (identifierEquals(REPLACE)) {
+        if (lexer.token() == Token.REPLACE) {
             MySqlReplaceStatement stmt = parseReplicate();
             statementList.add(stmt);
             return true;
@@ -556,7 +555,7 @@ public class MySqlStatementParser extends SQLStatementParser {
             return true;
         }
 
-        if (identifierEquals("SHOW")) {
+        if (lexer.token() == Token.SHOW) {
             SQLStatement stmt = parseShow();
             statementList.add(stmt);
             return true;
@@ -639,7 +638,7 @@ public class MySqlStatementParser extends SQLStatementParser {
     }
 
     public SQLStatement parseShow() {
-        acceptIdentifier("SHOW");
+        accept(Token.SHOW);
         
         if (lexer.token() == Token.COMMENT) {
             lexer.nextToken();
@@ -1511,7 +1510,7 @@ public class MySqlStatementParser extends SQLStatementParser {
     public MySqlReplaceStatement parseReplicate() {
         MySqlReplaceStatement stmt = new MySqlReplaceStatement();
 
-        acceptIdentifier(REPLACE);
+        accept(Token.REPLACE);
         
         if (lexer.token() == Token.COMMENT) {
             lexer.nextToken();
@@ -1624,7 +1623,7 @@ public class MySqlStatementParser extends SQLStatementParser {
         SQLLiteralExpr fileName = (SQLLiteralExpr) exprParser.expr();
         stmt.setFileName(fileName);
 
-        if (identifierEquals(REPLACE)) {
+        if (lexer.token() == Token.REPLACE) {
             stmt.setReplicate(true);
             lexer.nextToken();
         }
@@ -1697,7 +1696,7 @@ public class MySqlStatementParser extends SQLStatementParser {
         SQLLiteralExpr fileName = (SQLLiteralExpr) exprParser.expr();
         stmt.setFileName(fileName);
 
-        if (identifierEquals(REPLACE)) {
+        if (lexer.token() == Token.REPLACE) {
             stmt.setReplicate(true);
             lexer.nextToken();
         }

src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleStatementParser.java

@@ -1676,7 +1676,7 @@ public class OracleStatementParser extends SQLStatementParser {
         accept(Token.CREATE);
         if (lexer.token() == Token.OR) {
             lexer.nextToken();
-            acceptIdentifier("REPLACE");
+            accept(Token.REPLACE);
             stmt.setOrReplace(true);
         }
 

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

@@ -114,6 +114,8 @@ public class Keywords {
         map.put("OVER", Token.OVER);
         map.put("TO", Token.TO);
         map.put("USE", Token.USE);
+        
+        map.put("REPLACE", Token.REPLACE);
 
         DEFAULT_KEYWORDS = new Keywords(map);
     }

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

@@ -195,7 +195,7 @@ public class SQLStatementParser extends SQLParser {
                 continue;
             }
 
-            if (identifierEquals("SHOW")) {
+            if (lexer.token() == Token.SHOW) {
                 SQLStatement stmt = parseShow();
 
                 statementList.add(stmt);
@@ -489,7 +489,7 @@ public class SQLStatementParser extends SQLParser {
             return parseCreateSequence(false);
         } else if (token == Token.OR) {
             lexer.nextToken();
-            acceptIdentifier("REPLACE");
+            accept(Token.REPLACE);
             if (lexer.token() == Token.PROCEDURE) {
                 lexer.reset(markBp, markChar, Token.CREATE);
                 return parseCreateProcedure();
@@ -651,7 +651,7 @@ public class SQLStatementParser extends SQLParser {
         
         if (lexer.token() == Token.OR) {
             lexer.nextToken();
-            acceptIdentifier("REPLACE");
+            accept(Token.REPLACE);
             createView.setOrReplace(true);
         }
 

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

@@ -107,6 +107,8 @@ public enum Token {
     PASSWORD("PASSWORD"),
     DUAL("DUAL"),
     BINARY("BINARY"),
+    SHOW("SHOW"),
+    REPLACE("REPLACE"),
     
     //postgresql
     WINDOW("WINDOW"),