Trying to iterate mysql query if it returns empty results
I have mysql query i need to iterate it 3 time with some delay if the result is empty. if i get the result at first instance then it has to return the result. else it will iterate.
my code:
async function checkMySqlQuery(queries_data,callback){
try {
connection.connect(function(err) {
if (err) {throw err;}//
});
var db_queries=queries_data['db_queries'];
var params=queries_data['params'];
var mysql={'data':""};
connection.query(db_queries, params, function(
err,rows
) {
gloabl_vars.query_run.query_count++;
if (err) {
console.log("error: ", err);
callback(err);
} else {
var temp=rows;
if(temp.length >0){
mysql.data = {"info" :this.sql,"msg":gloabl_vars.messages.success,"res":temp};
callback(mysql);
}
else {
gloabl_vars.sleep(gloabl_vars.query_run.wait_time);
if(gloabl_vars.query_run.query_count<3){
await checkMySqlQuery(queries_data,function(data){
console.log("iteration");
console.log(data);
});
}
else{
console.log("Else case");
mysql.data = {"info" :this.sql,"msg":gloabl_vars.messages.failed,"res":temp};
callback(mysql);
}
}
}
});
}
catch(e){
console.log(e);
callback(e);
}
}
Am getting error as await is valid only for async function. eventhough my function is async the also same error. if i remove await then loop is not waiting for the mysql to run n check the result. it is running without waiting.
please let me know what am missing in the above. thanks in advance.
mysql node.js async-await
asked Nov 22 '18 at 6:48
Cherry gCherry g
369
add a comment |
I have mysql query i need to iterate it 3 time with some delay if the result is empty. if i get the result at first instance then it has to return the result. else it will iterate.
my code:
async function checkMySqlQuery(queries_data,callback){
try {
connection.connect(function(err) {
if (err) {throw err;}//
});
var db_queries=queries_data['db_queries'];
var params=queries_data['params'];
var mysql={'data':""};
connection.query(db_queries, params, function(
err,rows
) {
gloabl_vars.query_run.query_count++;
if (err) {
console.log("error: ", err);
callback(err);
} else {
var temp=rows;
if(temp.length >0){
mysql.data = {"info" :this.sql,"msg":gloabl_vars.messages.success,"res":temp};
callback(mysql);
}
else {
gloabl_vars.sleep(gloabl_vars.query_run.wait_time);
if(gloabl_vars.query_run.query_count<3){
await checkMySqlQuery(queries_data,function(data){
console.log("iteration");
console.log(data);
});
}
else{
console.log("Else case");
mysql.data = {"info" :this.sql,"msg":gloabl_vars.messages.failed,"res":temp};
callback(mysql);
}
}
}
});
}
catch(e){
console.log(e);
callback(e);
}
}
Am getting error as await is valid only for async function. eventhough my function is async the also same error. if i remove await then loop is not waiting for the mysql to run n check the result. it is running without waiting.
please let me know what am missing in the above. thanks in advance.
mysql node.js async-await
asked Nov 22 '18 at 6:48
Cherry gCherry g
369
add a comment |
I have mysql query i need to iterate it 3 time with some delay if the result is empty. if i get the result at first instance then it has to return the result. else it will iterate.
my code:
async function checkMySqlQuery(queries_data,callback){
try {
connection.connect(function(err) {
if (err) {throw err;}//
});
var db_queries=queries_data['db_queries'];
var params=queries_data['params'];
var mysql={'data':""};
connection.query(db_queries, params, function(
err,rows
) {
gloabl_vars.query_run.query_count++;
if (err) {
console.log("error: ", err);
callback(err);
} else {
var temp=rows;
if(temp.length >0){
mysql.data = {"info" :this.sql,"msg":gloabl_vars.messages.success,"res":temp};
callback(mysql);
}
else {
gloabl_vars.sleep(gloabl_vars.query_run.wait_time);
if(gloabl_vars.query_run.query_count<3){
await checkMySqlQuery(queries_data,function(data){
console.log("iteration");
console.log(data);
});
}
else{
console.log("Else case");
mysql.data = {"info" :this.sql,"msg":gloabl_vars.messages.failed,"res":temp};
callback(mysql);
}
}
}
});
}
catch(e){
console.log(e);
callback(e);
}
}
Am getting error as await is valid only for async function. eventhough my function is async the also same error. if i remove await then loop is not waiting for the mysql to run n check the result. it is running without waiting.
please let me know what am missing in the above. thanks in advance.
mysql node.js async-await
asked Nov 22 '18 at 6:48
Cherry gCherry g
369
I have mysql query i need to iterate it 3 time with some delay if the result is empty. if i get the result at first instance then it has to return the result. else it will iterate.
my code:
async function checkMySqlQuery(queries_data,callback){
try {
connection.connect(function(err) {
if (err) {throw err;}//
});
var db_queries=queries_data['db_queries'];
var params=queries_data['params'];
var mysql={'data':""};
connection.query(db_queries, params, function(
err,rows
) {
gloabl_vars.query_run.query_count++;
if (err) {
console.log("error: ", err);
callback(err);
} else {
var temp=rows;
if(temp.length >0){
mysql.data = {"info" :this.sql,"msg":gloabl_vars.messages.success,"res":temp};
callback(mysql);
}
else {
gloabl_vars.sleep(gloabl_vars.query_run.wait_time);
if(gloabl_vars.query_run.query_count<3){
await checkMySqlQuery(queries_data,function(data){
console.log("iteration");
console.log(data);
});
}
else{
console.log("Else case");
mysql.data = {"info" :this.sql,"msg":gloabl_vars.messages.failed,"res":temp};
callback(mysql);
}
}
}
});
}
catch(e){
console.log(e);
callback(e);
}
}
Am getting error as await is valid only for async function. eventhough my function is async the also same error. if i remove await then loop is not waiting for the mysql to run n check the result. it is running without waiting.
please let me know what am missing in the above. thanks in advance.
mysql node.js async-await
mysql node.js async-await
asked Nov 22 '18 at 6:48
Cherry gCherry g
369
asked Nov 22 '18 at 6:48
Cherry gCherry g
369
asked Nov 22 '18 at 6:48
Cherry gCherry g
369
asked Nov 22 '18 at 6:48
Cherry gCherry g
369
asked Nov 22 '18 at 6:48
Cherry gCherry g
369
369
add a comment |
add a comment |
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