fix: datetime fields returned without time part when time is 00:00:00

lib/packets/packet.js

@@ -9,7 +9,7 @@ const ErrorCodeToName = require('../constants/errors.js');
 const NativeBuffer = require('buffer').Buffer;
 const Long = require('long');
 const StringParser = require('../parsers/string.js');
-
+const Types = require('../constants/types.js');
 const INVALID_DATE = new Date(NaN);
 
 // this is nearly duplicate of previous function so generated code is not slower
@@ -292,14 +292,14 @@ class Packet {
       }
       return new Date(y, m - 1, d, H, M, S, ms);
     }
-    let str = this.readDateTimeString(6, 'T');
+    let str = this.readDateTimeString(6, 'T', null);
     if (str.length === 10) {
       str += 'T00:00:00';
     }
     return new Date(str + timezone);
   }
 
-  readDateTimeString(decimals, timeSep) {
+  readDateTimeString(decimals, timeSep, columnType) {
     const length = this.readInt8();
     let y = 0;
     let m = 0;
@@ -324,6 +324,8 @@ class Packet {
         leftPad(2, M),
         leftPad(2, S)
       ].join(':')}`;
+    } else if (columnType === Types.DATETIME) {
+      str += ' 00:00:00';
     }
     if (length > 10) {
       ms = this.readInt32();
@@ -425,7 +427,7 @@ class Packet {
     return StringParser.decode(
       this.buffer,
       encoding,
-      this.offset - len, 
+      this.offset - len,
       this.offset
     );
   }
@@ -915,7 +917,7 @@ class Packet {
   }
 
   static MockBuffer() {
-    const noop = function () {};
+    const noop = function () { };
     const res = Buffer.alloc(0);
     for (const op in NativeBuffer.prototype) {
       if (typeof res[op] === 'function') {

lib/parsers/binary_parser.js

@@ -42,7 +42,7 @@
     case Types.TIMESTAMP:
     case Types.NEWDATE:
       if (helpers.typeMatch(field.columnType, dateStrings, Types)) {
-        return `packet.readDateTimeString(${parseInt(field.decimals, 10)});`;
+        return `packet.readDateTimeString(${parseInt(field.decimals, 10)}, ${null}, ${field.columnType});`;
       }
       return `packet.readDateTime(${helpers.srcEscape(timezone)});`;
     case Types.TIME:
@@ -56,7 +56,7 @@
     case Types.GEOMETRY:
       return 'packet.parseGeometryValue();';
     case Types.VECTOR:
-      return 'packet.parseVector()';  
+      return 'packet.parseVector()';
     case Types.JSON:
       // Since for JSON columns mysql always returns charset 63 (BINARY),
       // we have to handle it according to JSON specs and use "utf8",

test/integration/connection/test-datetime.test.cjs

@@ -32,6 +32,7 @@ const date2 = '2010-12-10 14:12:09.019473';
 const date3 = null;
 const date4 = '2010-12-10 14:12:09.123456';
 const date5 = '2010-12-10 14:12:09.019';
+const date6 = '2024-11-10 00:00:00';
 
 function adjustTZ(d, offset) {
   if (offset === undefined) {
@@ -72,28 +73,20 @@ connection.query('INSERT INTO t set d1=?, d2=?, d3=?', [
 ]);
 
 connection1.query(
-  'CREATE TEMPORARY TABLE t (d1 DATE, d2 TIMESTAMP, d3 DATETIME, d4 DATETIME, d5 DATETIME(6), d6 DATETIME(3))',
+  'CREATE TEMPORARY TABLE t (d1 DATE, d2 TIMESTAMP, d3 DATETIME, d4 DATETIME, d5 DATETIME(6), d6 DATETIME(3), d7 DATETIME)',
+);
+connection1.query(
+  'INSERT INTO t set d1=?, d2=?, d3=?, d4=?, d5=?, d6=?, d7=?',
+  [date, date1, date2, date3, date4, date5, date6],
 );
-connection1.query('INSERT INTO t set d1=?, d2=?, d3=?, d4=?, d5=?, d6=?', [
-  date,
-  date1,
-  date2,
-  date3,
-  date4,
-  date5,
-]);
 
 connection2.query(
-  'CREATE TEMPORARY TABLE t (d1 DATE, d2 TIMESTAMP, d3 DATETIME, d4 DATETIME, d5 DATETIME(6), d6 DATETIME(3))',
+  'CREATE TEMPORARY TABLE t (d1 DATE, d2 TIMESTAMP, d3 DATETIME, d4 DATETIME, d5 DATETIME(6), d6 DATETIME(3), d7 DATETIME)',
+);
+connection2.query(
+  'INSERT INTO t set d1=?, d2=?, d3=?, d4=?, d5=?, d6=?, d7=?',
+  [date, date1, date2, date3, date4, date5, date6],
 );
-connection2.query('INSERT INTO t set d1=?, d2=?, d3=?, d4=?, d5=?, d6=?', [
-  date,
-  date1,
-  date2,
-  date3,
-  date4,
-  date5,
-]);
 
 connectionZ.query(
   'CREATE TEMPORARY TABLE t (d1 DATE, d2 DATETIME(3), d3 DATETIME(6))',
@@ -123,6 +116,7 @@ const dateAsStringExpected = [
     d4: date3,
     d5: date4,
     d6: date5,
+    d7: date6,
   },
 ];