ifx_db/test/nodeEE-leak-huge-query.js

IBM Informix bindings for node

var common = require("./common"), 
  odbc = require("../"), 
  db = new odbc.Database(), 
  assert = require("assert"),
  util = require('util'),
  tableOne = "leaktable1",
  tableTwo = "leaktable2",
  tableThree = "leaktable3",
  tableLimit = 4000,
  maxVarChar = "LEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTESTLEAKTES",
  insertCount = 0,
  dropCount = 0,
  insertCallBackCount=0,
  initialMemHeap = 0,
  maxDiff = 1000000;
  
  try
  {
    global.gc();
    initialMemHeap = util.inspect(process.memoryUsage().heapUsed);
    db.open(common.connectionString, function(err) {
      
      createTablesQuery();

      while(insertCount < tableLimit) 
      {
        insertCount++;
        insertQueries();
      }
      
      if(insertCount === tableLimit)
      {
        finalQueries();
      }

    });
  }
  catch(e)
  {
    console.log(e);
    db.close(function () {
      console.log("Connection closed on error");
    });
    
  }
  
  function createTablesQuery()
  {
    db.query("create table " + tableOne + " (PID INTEGER, C1 VARCHAR(255), C2 VARCHAR(255), C3 VARCHAR(255))", function(err, data){
      if (err == null)
      {
        //console.log("Table " + tableOne + " created");
      }
        
      else
      {
        console.log(err);  
      }
    });

    db.query("create table " + tableTwo + " (PID INTEGER, C1 VARCHAR(255), C2 VARCHAR(255), C3 VARCHAR(255))", function(err, data){
      if (err == null)
      {
        //console.log("Table " + tableTwo + " created");
      }
        
      else
      {
        console.log(err);  
      }
    });
  }

  function insertQueries()
  {
    query = "values ('" + insertCount + "', '" + maxVarChar + "', '" + maxVarChar + "', '" + maxVarChar + "')";
    db.query("insert into " + tableOne + " " + query, icback);
    db.query("insert into " + tableTwo + " " + query, icback);
  }

  function finalQueries()
  {
    db.query("select * from " + tableOne, scback);
    db.query("select * from " + tableTwo, scback);
    db.query("select * from " + tableOne + " INNER JOIN " + tableTwo + " ON " + tableOne + ".PID = " + tableTwo + ".PID", scback);
    db.query("drop table " + tableOne, drcback.bind({tableName: tableOne}));
    db.query("drop table " + tableTwo, drcback.bind({tableName: tableTwo}));
  }

  function icback(err, data)
  {
    
    if (err == null)
    {
      insertCallBackCount++;
      //console.log("INSERT", insertCallBackCount);
    }
      
    else
    {
      console.log(err);  
    }
  }

  function scback(err, data)
  {
    
    if (err == null)
    {
      //console.log ("SELECT STATEMENT SUCCESSFUL");
    }
      
    else
    {
      console.log(err);  
    }
  }

  function drcback(err, data)
  {
    
    dropCount++;
    if (err == null)
    {
      //console.log ("DROP TABLE " + this.tableName + " SUCCESSFUL");
    }
      
    else
    {
      console.log(err);  
    }

    if(dropCount == 2)
    {
      closedbConnection();
    }
  }

  function closedbConnection()
  {
    db.close(function () {
      //console.log("Database Connection Closed");
      checkMemory();
    });
  }
  function checkMemory()
  {
    global.gc();
    diffHeapUse =  util.inspect(process.memoryUsage().heapUsed) - initialMemHeap;
    //console.log("DIFFERENCE ", diffHeapUse);
    assert(diffHeapUse < maxDiff);
  }