HHH-19005 Memory leak modify String to StringBuilder

Author: dev3way

hibernate-core/src/main/java/org/hibernate/engine/jdbc/internal/BasicFormatterImpl.java

@@ -79,13 +79,12 @@ public String perform() {
 				}
 
 				lcToken = token.toLowerCase( Locale.ROOT );
+				StringBuilder sb = new StringBuilder();
 				switch ( lcToken ) {
-
 					case "'":
 					case "`":
 					case "\"":
 						String t;
-						StringBuilder sb = new StringBuilder();
 						sb.append( this.token );
 						do {
 							t = tokens.nextToken();
@@ -100,14 +99,13 @@ public String perform() {
 					// see SQLServerDialect.openQuote and SQLServerDialect.closeQuote
 					case "[":
 						String tt;
-						StringBuilder sb2 = new StringBuilder();
-						sb2.append( this.token );
+						sb.append( this.token );
 						do {
 							tt = tokens.nextToken();
-							sb2.append( tt );
+							sb.append( tt );
 						}
 						while ( !"]".equals( tt ) && tokens.hasMoreTokens() );
-						this.token = sb2.toString();
+						this.token = sb.toString();
 						lcToken = token;
 						misc();
 						break;