strongduanmu commented on a change in pull request #14197:
URL: https://github.com/apache/shardingsphere/pull/14197#discussion_r773001682



##########
File path: 
shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/text/admin/mysql/executor/ShowTablesExecutor.java
##########
@@ -78,7 +78,7 @@ private QueryResult getQueryResult(final String schemaName) {
     private Collection<String> getAllTableNames(final String schemaName) {
         Collection<String> allTableNames = 
ProxyContext.getInstance().getMetaData(schemaName).getSchema().getAllTableNames();
         if (showTablesStatement.getFilter().isPresent()) {
-            Optional<String> pattern = 
showTablesStatement.getFilter().get().getLike().map(each -> 
SQLUtil.convertLikePatternToRegex(each.getPattern()));
+            Optional<String> pattern = 
showTablesStatement.getFilter().get().getLike().map(each -> 
SQLUtil.convertLikePatternToRegex(each.getPattern().toLowerCase()));
             return pattern.isPresent() ? allTableNames.stream().filter(each -> 
each.matches(pattern.get())).collect(Collectors.toList()) : allTableNames;

Review comment:
       Hi @MingxingLAI, `allTableNames` returns lowercase table names now, 
which is the cause of confusion for users.




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