improve parser

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

@@ -76,7 +76,7 @@ public class MySqlCreateTableParser extends SQLCreateTableParser {
             lexer.nextToken();
 
             for (;;) {
-                if (lexer.token() == Token.IDENTIFIER) {
+                if (lexer.token() == Token.IDENTIFIER || lexer.token() == Token.LITERAL_CHARS) {
                     SQLColumnDefinition column = this.exprParser.parseColumn();
                     stmt.getTableElementList().add(column);
                 } else if (lexer.token() == Token.CONSTRAINT //

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

@@ -146,6 +146,7 @@ public class SchemaStatVisitor extends SQLASTVisitorAdapter {
         boolean flag0 = false;
         boolean flag1 = false;
         boolean flag2 = false;
+        boolean flag3 = false;
         for (int i = 0; i < ident.length(); ++i) {
             final char ch = ident.charAt(i);
             if (ch == '\"') {
@@ -154,6 +155,8 @@ public class SchemaStatVisitor extends SQLASTVisitorAdapter {
                 flag1 = true;
             } else if (ch == ' ') {
                 flag2 = true;
+            } else if (ch == '\'') {
+                flag3 = true;
             }
         }
         if (flag0) {
@@ -167,6 +170,10 @@ public class SchemaStatVisitor extends SQLASTVisitorAdapter {
         if (flag2) {
             ident = ident.replaceAll(" ", "");
         }
+        
+        if (flag3) {
+            ident = ident.replaceAll("'", "");
+        }
 
         ident = aliasWrap(ident);
 

src/main/java/com/alibaba/druid/wall/WallProvider.java

@@ -469,7 +469,7 @@ public abstract class WallProvider {
             violations.addAll(visitor.getViolations());
         }
 
-        if (context != null && context.getWarnnings() >= 2) {
+        if (visitor.getViolations().size() == 0 && context != null && context.getWarnnings() >= 2) {
             if (context.getDeleteNoneConditionWarnnings() > 0) {
                 violations.add(new IllegalSQLObjectViolation(ErrorCode.NONE_CONDITION, "delete none condition", sql));
             } else if (context.getUpdateNoneConditionWarnnings() > 0) {

src/main/java/com/alibaba/druid/wall/spi/WallVisitorUtils.java

@@ -1180,6 +1180,11 @@ public class WallVisitorUtils {
         if (name.startsWith("\"") && name.endsWith("\"")) {
             name = name.substring(1, name.length() - 1);
         }
+        
+        if (name.startsWith("'") && name.endsWith("'")) {
+            name = name.substring(1, name.length() - 1);
+        }
+        
         if (name.startsWith("`") && name.endsWith("`")) {
             name = name.substring(1, name.length() - 1);
         }