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https://issues.apache.org/jira/browse/HBASE-27928?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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wenhao reassigned HBASE-27928:
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Assignee: wenhao
> listTableNames has different criteria for judging the regular matching of
> tables in the default library
> -------------------------------------------------------------------------------------------------------
>
> Key: HBASE-27928
> URL: https://issues.apache.org/jira/browse/HBASE-27928
> Project: HBase
> Issue Type: Bug
> Components: Admin
> Affects Versions: 2.0.0
> Reporter: wenhao
> Assignee: wenhao
> Priority: Minor
>
> There are the following tables under default: order_info, test123
> When I execute the following logic (get the table that starts with test),
> test123 is returned
> {code:java}
> String tableNameRegex = "^(test).*";
> TableName[] tns = admin.listTableNames(Pattern.compile(tableNameRegex));{code}
> When I execute the following logic (get a table that doesn't start with
> test), the return is order_info, test123
> {code:java}
> String tableNameRegex = "^(?!test).*";
> TableName[] tns = admin.listTableNames(Pattern.compile(tableNameRegex));{code}
> As you can see, table test123 is returned both times.
>
> When I look at the source code, I find that when I perform a regular match
> for the table in the default namespace, I perform one step more judgment,
> resulting in a table starting with test being returned both times.
> {code:java}
> boolean matched = pattern.matcher(tableName).matches();
> if (!matched && htd.getTableName().getNamespaceAsString().equals(defaultNS)) {
> matched = pattern.matcher(defaultNS + TableName.NAMESPACE_DELIM +
> tableName).matches();
> }{code}
>
> I think there are problems with this regular matching logic
>
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