mysql: limit 0 describe

nexus/peer-mysql/src/lib.rs

@@ -9,7 +9,7 @@ use peer_cursor::{
 };
 use pgwire::error::{ErrorInfo, PgWireError, PgWireResult};
 use pt::peerdb_peers::MySqlConfig;
-use sqlparser::ast::{CloseCursor, Declare, FetchDirection, Statement};
+use sqlparser::ast::{CloseCursor, Declare, Expr, FetchDirection, Statement, Value};
 use stream::MyRecordStream;
 
 pub struct MySqlQueryExecutor {
@@ -202,6 +202,7 @@ impl QueryExecutor for MySqlQueryExecutor {
             Statement::Query(query) => {
                 let mut query = query.clone();
                 ast::rewrite_query(&self.peer_name, &mut query);
+                query.limit = Expr::Value(Value::Number("0", false));
                 Ok(Some(self.query_schema(query.to_string()).await?))
             }
             Statement::Declare { stmts } => {
@@ -228,5 +229,5 @@ impl QueryExecutor for MySqlQueryExecutor {
                 "only SELECT statements are supported in mysql".to_owned(),
             )))),
         }
-    }
+     }
 }