[TD-1001] adapt nodejs connector

src/connector/nodejs/nodetaos/cinterface.js

@@ -346,7 +346,7 @@ CTaosInterface.prototype.useResult = function useResult(result) {
       })
     }
   }
-  return {fields:fields}
+  return fields;
 }
 CTaosInterface.prototype.fetchBlock = function fetchBlock(result, fields) {
   let pblock = ref.ref(ref.ref(ref.NULL)); // equal to our raw data
@@ -355,7 +355,6 @@ CTaosInterface.prototype.fetchBlock = function fetchBlock(result, fields) {
     return {block:null, num_of_rows:0};
   }
   var fieldL = this.libtaos.taos_fetch_lengths(result);
-  var numoffields = this.libtaos.taos_field_count(result);
 
   let isMicro = (this.libtaos.taos_result_precision(result) == FieldTypes.C_TIMESTAMP_MICRO);
 
@@ -363,26 +362,25 @@ CTaosInterface.prototype.fetchBlock = function fetchBlock(result, fields) {
   
   if (ref.isNull(fieldL) == false) {
     
-    for (let i = 0; i < numoffields; i ++) {
+    for (let i = 0; i < fields.length; i ++) {
       let plen = ref.reinterpret(fieldL, 4, i*4);
       let len = plen.readInt32LE(0);
        fieldlens.push(len);
     }
   }
 
-  let blocks = new Array(numoffields);
+  let blocks = new Array(fields.length);
   blocks.fill(null);
   num_of_rows = Math.abs(num_of_rows);
   let offset = 0;
   pblock = pblock.deref();
-  for (let i = 0; i < numoffields; i++) {
-
-    if (!convertFunctions[fields['fields'][i]['type']] ) {
+  for (let i = 0; i < fields.length; i++) {
+    pdata = ref.reinterpret(pblock,8,i*8);
+    pdata = ref.ref(pdata.readPointer());
+    if (!convertFunctions[fields[i]['type']] ) {
       throw new errors.DatabaseError("Invalid data type returned from database");
     }
-    blocks[i] = convertFunctions[fields['fields'][i]['type']](pblock, num_of_rows, fieldlens[i], offset, isMicro);
-    console.log(blocks[i]);
-    offset += fields['fields'][i]['bytes'] * num_of_rows;
+    blocks[i] = convertFunctions[fields[i]['type']](pdata, 1, fieldlens[i], offset, isMicro);
   }
   return {blocks: blocks, num_of_rows:Math.abs(num_of_rows)}
 }
@@ -429,9 +427,7 @@ CTaosInterface.prototype.fetch_rows_a = function fetch_rows_a(result, callback,
   let asyncCallbackWrapper = function (param2, result2, numOfRows2) {
     // Data preparation to pass to cursor. Could be bottleneck in query execution callback times.
     let row = cti.libtaos.taos_fetch_row(result2);
-    console.log(row);
     let fields = cti.fetchFields_a(result2);
-    
 
     let isMicro = (cti.libtaos.taos_result_precision(result2) == FieldTypes.C_TIMESTAMP_MICRO);
     let blocks = new Array(fields.length);
@@ -446,21 +442,17 @@ CTaosInterface.prototype.fetch_rows_a = function fetch_rows_a(result, callback,
         let plen = ref.reinterpret(fieldL, 8, i*8);
         let len = ref.get(plen,0,ref.types.int32);
         fieldlens.push(len);
-        console.log('11111111111111111111');
-        console.log(fields.length);
-        console.log(len);
       }
     }
-
     if (numOfRows2 > 0){
       for (let i = 0; i < fields.length; i++) {
         if (!convertFunctions[fields[i]['type']] ) {
           throw new errors.DatabaseError("Invalid data type returned from database");
         }
         let prow = ref.reinterpret(row,8,i*8);
-        //blocks[i] = convertFunctions[fields[i]['type']](ref.get(prow,0,ref.types.void_ptr), numOfRows2, fieldlens[i], 0, isMicro);
-        console.log(prow);
-        blocks[i] = convertFunctions[fields[i]['type']](ref.readPointer(prow), numOfRows2, fieldlens[i], 0, isMicro);
+        prow = prow.readPointer();
+        prow = ref.ref(prow);
+        blocks[i] = convertFunctions[fields[i]['type']](prow, 1, fieldlens[i], offset, isMicro);
         //offset += fields[i]['bytes'] * numOfRows2;
       }
     }

src/connector/nodejs/nodetaos/cursor.js

@@ -133,8 +133,6 @@ TDengineCursor.prototype.execute = function execute(operation, options, callback
     else {
       this._fields = this._chandle.useResult(this._result);
       this.fields = this._fields;
-      console.log('++++++++++++++++++++++++++');
-      console.log(this._result);
       wrapCB(callback);
 
       return this._result; //return a pointer to the result
@@ -205,10 +203,12 @@ TDengineCursor.prototype.fetchall = function fetchall(options, callback) {
       break;
     }
     this._rowcount += num_of_rows;
+    let numoffields = this._fields.length;
     for (let i = 0; i < num_of_rows; i++) {
       data.push([]);
-      let rowBlock = new Array(this._fields.length);
-      for (let j = 0; j < this._fields.length; j++) {
+      
+      let rowBlock = new Array(numoffields);
+      for (let j = 0; j < numoffields; j++) {
         rowBlock[j] = block[j][i];
       }
       data[data.length-1] = (rowBlock);
@@ -268,7 +268,7 @@ TDengineCursor.prototype.execute_a = function execute_a (operation, options, cal
       let fieldCount = cr._chandle.numFields(res2);
       if (fieldCount == 0) {
         cr._chandle.freeResult(res2);
-      }
+      } 
       else {
         return res2;
       }

src/connector/nodejs/test/test.js

@@ -28,7 +28,7 @@ c1.execute('create table if not exists stabletest (ts timestamp, v1 int, v2 int,
 // Shell Test : The following uses the cursor to imitate the taos shell
 
 // Insert
-for (let i = 0; i < 100; i++) {
+for (let i = 0; i < 1000; i++) {
   let insertData = ["now+" + i + "s", // Timestamp
                     parseInt( R(-Math.pow(2,31) + 1 , Math.pow(2,31) - 1) ), // Int
                     parseInt( R(-Math.pow(2,31) + 1 , Math.pow(2,31) - 1) ), // BigInt
@@ -40,18 +40,18 @@ for (let i = 0; i < 100; i++) {
                     randomBool(),
                     "\"Nchars\""]; // Bool
   c1.execute('insert into td_connector_test.all_types values(' + insertData.join(',') + ' );', {quiet:true});
-  if (i % 10 == 0) {
+  if (i % 100 == 0) {
     console.log("Insert # " , i);
   }
 }
 
 // Select
 console.log('select * from td_connector_test.all_types limit 3 offset 100;');
-c1.execute('select * from td_connector_test.all_types limit 1 offset 100;');
+c1.execute('select * from td_connector_test.all_types limit 2 offset 100;');
 var d = c1.fetchall();
 console.log(c1.fields);
 console.log(d);
-/*
+
 // Functions
 console.log('select count(*), avg(_int), sum(_float), max(_bigint), min(_double) from td_connector_test.all_types;')
 c1.execute('select count(*), avg(_int), sum(_float), max(_bigint), min(_double) from td_connector_test.all_types;');
@@ -61,12 +61,14 @@ console.log(d);
 
 // Immediate Execution like the Shell
 
-c1.query('select count(*), stddev(_double), min(_tinyint) from all_types where _tinyint > 50 and _int < 0;', true).then(function(result){
-  result.pretty();
-})
+//c1.query('select count(*), stddev(_double), min(_tinyint) from all_types where _tinyint > 50 and _int < 0;', true).then(function(result){
+//  result.pretty();
+//})
+
 c1.query('select _tinyint, _bool from all_types where _tinyint > 50 and _int < 0 limit 50;', true).then(function(result){
   result.pretty();
 })
+
 c1.query('select stddev(_double), stddev(_bigint), stddev(_float) from all_types;', true).then(function(result){
   result.pretty();
 })
@@ -136,4 +138,3 @@ setTimeout(function(){
   c1.query('drop database td_connector_test;');
 },2000);
 conn.close();
-*/
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