Great! Thanks. Thomas
On Mon, Dec 26, 2022 at 5:21 AM Benchao Li <[email protected]> wrote: > It would be called only when it's needed, not *every time*, it depends on > what SQL statement you are validating. If your Sql statement contains a > table reference which needs to be resolved by the Schema, it will be > called[1]. > > [1] > > https://github.com/apache/calcite/blob/main/core/src/main/java/org/apache/calcite/sql/validate/SchemaNamespace.java > > Thomas Wang <[email protected]> 于2022年12月26日周一 21:00写道： > > > Thanks Benchao. You meant Schema#getTableNames is called *every time* > when > > a SQL statement is being validated? > > > > The reason why I'm asking is because I want to build a service and am > > wondering if I can reuse schema objects. > > > > Thanks. > > > > Thomas > > > > On Mon, Dec 26, 2022 at 3:26 AM Benchao Li <[email protected]> wrote: > > > > > Hi Thomas, > > > > > > Schema#getTableNames is mainly used in SQL validating phase. You do not > > > need to call it manually. > > > > > > Thomas Wang <[email protected]> 于2022年12月26日周一 11:08写道： > > > > > > > Hi Calcite community: > > > > > > > > I see in the code that JdbcSchema.getTable(String name) is using a > > local > > > > cached variable tableMap. I'm wondering under what circumstances, > this > > > > local variable gets refreshed? Based on the code comment, it seems > the > > > > variable is refreshed when Jdbc.getTableNames() is called, but I > didn't > > > > find anywhere in the codebase where JdbcSchema.getTableNames() is > > called. > > > > Do I need to manually call this method to refresh? Thanks. > > > > > > > > Thomas > > > > > > > > > > > > > -- > > > > > > Best, > > > Benchao Li > > > > > > > > -- > > Best, > Benchao Li >
