CODEWITHSUNDEEP
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Philip Lee
Philip Lee

Reputation: 189

MemSQL: Table is a distributed table. You cannot query it from a leaf

I've installed MemSQL on a single server for testing and have created three tables as described in this example:

MEMsql - how to run queries

I can query the database from within the Memsql client running via ssh without any issues. However, whenever I try to run the same query programmatically in PHP I get the error "Table 'memsql_example.employees' is a distributed table. You cannot query it from a leaf".

The PHP code that generates that error is below:

<?php

  $dbHost="127.0.0.1";
  $dbUser="root";
  $dbPass="";
  $dbName="memsql_example";
  $dbPort=3307;

  // Connect to database
  $mysqli = new mysqli($dbHost, $dbUser, $dbPass, $dbName, $dbPort);
  if ($mysqli==false) die ("Error connecting to database\n");

  $sql="select count(*) from employees;";
  $result=$mysqli->query($sql);
  if (!$result) {
    printf("Errormessage: %s\n", $mysqli->error);
    die();
  }

?>

I've tried running the above script from another server by changing the $dbHost to point to the server IP rather than 127.0.0.1 but without success as I get the same error.

I've stared at this for hours - what am I doing wrong ?

Thanks in advance ...

Upvotes: 0

Views: 475

Answers (1)

Rob Walzer
Rob Walzer

Reputation: 349

Queries in MemSQL should be directed against the aggregator, which by default will run on port 3306. It looks like you are querying port 3307, which will be a leaf by default in your configuration.

Upvotes: 1

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