diff --git a/.github/workflows/ci-linux.yml b/.github/workflows/ci-linux.yml
index e616ee576c..5186c8297c 100644
--- a/.github/workflows/ci-linux.yml
+++ b/.github/workflows/ci-linux.yml
@@ -13,7 +13,18 @@ env:
   MYSQL_DATABASE: test
 
 jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Delete artifacts
+        uses: jimschubert/delete-artifacts-action@v1
+        with:
+          log_level: 'debug'
+          min_bytes: '0'
+          pattern: '\.xml'
+
   tests-linux:
+    needs: [ cleanup ]
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
@@ -71,5 +82,41 @@ jobs:
         run: npm ci
       - name: Wait mysql server is ready
         run: node tools/wait-up.js
+
       - name: Run tests
-        run: FILTER=${{matrix.filter}} MYSQL_USE_TLS=${{ matrix.use-tls }} MYSQL_USE_COMPRESSION=${{ matrix.use-compression }} npm test
\ No newline at end of file
+        run: FILTER=${{matrix.filter}} MYSQL_USE_TLS=${{ matrix.use-tls }} MYSQL_USE_COMPRESSION=${{ matrix.use-compression }} npm run coverage-test
+
+      - run: echo "coverage-artifact-name=`echo -n "${{github.run_id}}-${{ matrix.node-version }}-${{ matrix.mysql-version }}-${{matrix.use-tls}}-${{matrix.use-compression}}" | shasum | cut -d " " -f 1`"  >> $GITHUB_ENV   
+      - uses: actions/upload-artifact@v2
+        with:
+          name: coverage-${{env.coverage-artifact-name}}
+          path: coverage/cobertura-coverage.xml
+      
+  coverage:
+    needs: [ tests-linux ]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Restore coverage
+        uses: actions/download-artifact@v2
+        with:
+          path: coverage
+
+      - name: get list of coverage files
+        run: echo "coverage-files=`find coverage | grep xml | paste -s -d\; -`"  >> $GITHUB_ENV
+      
+      - name: ReportGenerator
+        uses: danielpalme/ReportGenerator-GitHub-Action@4.8.12
+        with:
+          reports: "${{ env.coverage-files }}"
+          targetdir: '.'
+          reporttypes: 'Cobertura'
+
+      - name: Debug
+        run: cat Cobertura.xml
+
+      - name: Display coverage
+        uses: ewjoachim/coverage-comment-action@v1
+        with:
+          COVERAGE_FILE: "Cobertura.xml"
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.gitignore b/.gitignore
index 4c10714aac..a78da11f40 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,6 +10,7 @@ lib-cov
 .idea/
 .vscode/
 .npmrc
+coverage/
 mysqldata/
 
 tmp
diff --git a/Changelog.md b/Changelog.md
index 8421f89852..093c46a5ad 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,15 @@
+2.3.3 ( 14/11/2021 )
+  - no changes compared to 2.3.3-rc.0
+
+2.3.3-rc.0 ( 5/11/2021 )
+  - fix ColumnDefinition.db is broken when 
+    encoding is not utf-8                         #1423                 
+  - typeCast: Fix field.length to be number       #1427, #1426
+  - initiall support for coverage reporting in CI #1425
+  - fix performance regression for results with   #1445, #1432
+    large (300+) number of columns                
+                                                  
+
 2.3.2 ( 16/10/2021 )
   - fix regression causing typeCast + JSON field
     to error                                      #1418, #1420
diff --git a/lib/commands/query.js b/lib/commands/query.js
index d5c6cdd1ae..e51da3c13e 100644
--- a/lib/commands/query.js
+++ b/lib/commands/query.js
@@ -212,7 +212,7 @@ class Query extends Command {
     if (this._receivedFieldsCount === this._fieldCount) {
       const fields = this._fields[this._resultIndex];
       this.emit('fields', fields);
-      this._rowParser = new (getTextParser(fields, this.options, connection.config))();
+      this._rowParser = new (getTextParser(fields, this.options, connection.config))(fields);
       return Query.prototype.fieldsEOF;
     }
     return Query.prototype.readField;
diff --git a/lib/packets/column_definition.js b/lib/packets/column_definition.js
index 179c8cd065..29df8466b2 100644
--- a/lib/packets/column_definition.js
+++ b/lib/packets/column_definition.js
@@ -103,9 +103,7 @@ class ColumnDefinition {
 
   // node-mysql compatibility: alias "db" to "schema"
   get db() {
-    const start = this._schemaStart;
-    const end = start._shemaLength;
-    return this._buf.utf8Slice(start, end);
+    return this.schema;
   }
 }
 
diff --git a/lib/parsers/text_parser.js b/lib/parsers/text_parser.js
index 5af86674aa..0af4a7ab45 100644
--- a/lib/parsers/text_parser.js
+++ b/lib/parsers/text_parser.js
@@ -78,6 +78,25 @@ function compile(fields, options, config) {
     options.typeCast = config.typeCast;
   }
 
+  function wrap(field, _this) {
+    return {
+      type: typeNames[field.columnType],
+      length: field.columnLength,
+      db: field.schema,
+      table: field.table,
+      name: field.name,
+      string: function() {
+        return _this.packet.readLengthCodedString(field.encoding);
+      },
+      buffer: function() {
+        return _this.packet.readLengthCodedBuffer();
+      },
+      geometry: function() {
+        return _this.packet.parseGeometryValue();
+      }
+    };
+  }
+
   const parserFn = genFunc();
 
   /* eslint-disable no-trailing-spaces */
@@ -88,42 +107,14 @@ function compile(fields, options, config) {
   );
 
   // constructor method
-  parserFn('constructor() {');
+  parserFn('constructor(fields) {');
   // node-mysql typeCast compatibility wrapper
   // see https://github.com/mysqljs/mysql/blob/96fdd0566b654436624e2375c7b6604b1f50f825/lib/protocol/packets/Field.js
   if (typeof options.typeCast === 'function') {
     parserFn('const _this = this;');
-    for(let i=0; i<fields.length; ++i) {
-      const field = fields[i];
-      const encodingExpr = helpers.srcEscape(field.encoding);
-      const readCode = readCodeFor(
-        fields[i].columnType,
-        fields[i].characterSet,
-        encodingExpr,
-        config,
-        options
-      );
-      parserFn(`this.wrap${i} = {
-        type: ${helpers.srcEscape(typeNames[field.columnType])},
-        length: ${helpers.srcEscape(field.columnLength)},
-        db: ${helpers.srcEscape(field.schema)},
-        table: ${helpers.srcEscape(field.table)},
-        name: ${helpers.srcEscape(field.name)},
-        string: function() {
-          return _this.packet.readLengthCodedString(${encodingExpr});
-        },
-        buffer: function() {
-          return _this.packet.readLengthCodedBuffer();
-        },
-        geometry: function() {
-          return _this.packet.parseGeometryValue();
-        },
-        readNext: function() {
-          const packet = _this.packet;
-          return ${readCode};
-        }
-      };`);
-    }
+    parserFn('for(let i=0; i<fields.length; ++i) {');
+    parserFn('this[`wrap${i}`] = wrap(fields[i], _this);');
+    parserFn('}');
   }
   parserFn('}');
 
@@ -165,9 +156,7 @@ function compile(fields, options, config) {
     } else {
       lvalue = `result[${fieldName}]`;
     }
-    if (typeof options.typeCast === 'function') {
-      parserFn(`${lvalue} = options.typeCast(this.wrap${i}, this.wrap${i}.readNext);`);
-    } else if (options.typeCast === false) {
+    if (options.typeCast === false) {
       parserFn(`${lvalue} = packet.readLengthCodedBuffer();`);
     } else {
       const encodingExpr = `fields[${i}].encoding`;
@@ -178,8 +167,12 @@ function compile(fields, options, config) {
         config,
         options
       );
-      parserFn(`${lvalue} = ${readCode};`);
-    }
+      if (typeof options.typeCast === 'function') {
+        parserFn(`${lvalue} = options.typeCast(this.wrap${i}, function() { return ${readCode} });`);
+      }  else {
+        parserFn(`${lvalue} = ${readCode};`);
+      }
+    }  
   }
 
   parserFn('return result;');
@@ -196,6 +189,9 @@ function compile(fields, options, config) {
       parserFn.toString()
     );
   }
+  if (typeof options.typeCast === 'function') {
+    return parserFn.toFunction({wrap});
+  } 
   return parserFn.toFunction();
 }
 
diff --git a/package-lock.json b/package-lock.json
index 89ac2d9fa1..cb9be53e9d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "mysql2",
-  "version": "2.3.2",
+  "version": "2.3.3",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "mysql2",
-      "version": "2.3.2",
+      "version": "2.3.3",
       "license": "MIT",
       "dependencies": {
         "denque": "^2.0.1",
@@ -23,6 +23,7 @@
         "@typescript-eslint/parser": "^4.33.0",
         "assert-diff": "^3.0.2",
         "benchmark": "^2.1.4",
+        "c8": "^7.10.0",
         "error-stack-parser": "^2.0.3",
         "eslint": "^7.32.0",
         "eslint-config-prettier": "^8.3.0",
@@ -65,6 +66,12 @@
         "js-tokens": "^4.0.0"
       }
     },
+    "node_modules/@bcoe/v8-coverage": {
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/@bcoe/v8-coverage/-/v8-coverage-0.2.3.tgz",
+      "integrity": "sha512-0hYQ8SB4Db5zvZB4axdMHGwEaQjkZzFjQiN9LVYvIFB2nSUHW9tYpxWriPrWDASIxiaXax83REcLxuSdnGPZtw==",
+      "dev": true
+    },
     "node_modules/@eslint/eslintrc": {
       "version": "0.4.3",
       "integrity": "sha512-J6KFFz5QCYUJq3pf0mjEcCJVERbzv71PUIDczuh9JkwGEzced6CO5ADLHB1rbf/+oPBtoPfMYNOpGDzCANlbXw==",
@@ -102,6 +109,15 @@
       "integrity": "sha512-wdppn25U8z/2yiaT6YGquE6X8sSv7hNMWSXYSSU1jGv/yd6XqjXgTDJ8KP4NgjTXfJ3GbRjeeb8RTV7a/VpM+w==",
       "dev": true
     },
+    "node_modules/@istanbuljs/schema": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/@istanbuljs/schema/-/schema-0.1.3.tgz",
+      "integrity": "sha512-ZXRY4jNvVgSVQ8DL3LTcakaAtXwTVUxE81hslsyD2AtoXW/wVob10HkOJ1X/pAlcI7D+2YoZKg5do8G/w6RYgA==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
       "integrity": "sha512-vq24Bq3ym5HEQm2NKCr3yXDwjc7vTsEThRDnkp2DK9p1uqLR+DHurm/NOTo0KG7HYHU7eppKZj3MyqYuMBf62g==",
@@ -134,6 +150,12 @@
         "node": ">= 8"
       }
     },
+    "node_modules/@types/istanbul-lib-coverage": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.3.tgz",
+      "integrity": "sha512-sz7iLqvVUg1gIedBOvlkxPlc8/uVzyS5OwGz1cKjXzkl3FpL3al0crU8YGU1WoHkxn0Wxbw5tyi6hvzJKNzFsw==",
+      "dev": true
+    },
     "node_modules/@types/json-schema": {
       "version": "7.0.9",
       "integrity": "sha512-qcUXuemtEu+E5wZSJHNxUXeCZhAfXKQ41D+duX+VYPde7xyEVZci+/oXKJL13tnRs9lR2pr4fod59GT6/X1/yQ==",
@@ -532,6 +554,32 @@
         "node": ">=8"
       }
     },
+    "node_modules/c8": {
+      "version": "7.10.0",
+      "resolved": "https://registry.npmjs.org/c8/-/c8-7.10.0.tgz",
+      "integrity": "sha512-OAwfC5+emvA6R7pkYFVBTOtI5ruf9DahffGmIqUc9l6wEh0h7iAFP6dt/V9Ioqlr2zW5avX9U9/w1I4alTRHkA==",
+      "dev": true,
+      "dependencies": {
+        "@bcoe/v8-coverage": "^0.2.3",
+        "@istanbuljs/schema": "^0.1.2",
+        "find-up": "^5.0.0",
+        "foreground-child": "^2.0.0",
+        "istanbul-lib-coverage": "^3.0.1",
+        "istanbul-lib-report": "^3.0.0",
+        "istanbul-reports": "^3.0.2",
+        "rimraf": "^3.0.0",
+        "test-exclude": "^6.0.0",
+        "v8-to-istanbul": "^8.0.0",
+        "yargs": "^16.2.0",
+        "yargs-parser": "^20.2.7"
+      },
+      "bin": {
+        "c8": "bin/c8.js"
+      },
+      "engines": {
+        "node": ">=10.12.0"
+      }
+    },
     "node_modules/callsites": {
       "version": "3.1.0",
       "integrity": "sha512-P8BjAsXvZS+VIDUI11hHCQEv74YT67YUi5JJFNWIqL235sBmjX4+qx9Muvls5ivyNENctx46xQLQ3aTuE7ssaQ==",
@@ -678,6 +726,17 @@
         "node": ">=8"
       }
     },
+    "node_modules/cliui": {
+      "version": "7.0.4",
+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-7.0.4.tgz",
+      "integrity": "sha512-OcRE68cOsVMXp1Yvonl/fzkQOyjLSu/8bhPDfQt0e0/Eb283TKP20Fs2MqoPsr9SwA595rRCA+QMzYc9nBP+JQ==",
+      "dev": true,
+      "dependencies": {
+        "string-width": "^4.2.0",
+        "strip-ansi": "^6.0.0",
+        "wrap-ansi": "^7.0.0"
+      }
+    },
     "node_modules/color-convert": {
       "version": "1.9.3",
       "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
@@ -711,6 +770,15 @@
       "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
       "dev": true
     },
+    "node_modules/convert-source-map": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-1.8.0.tgz",
+      "integrity": "sha512-+OQdjP49zViI/6i7nIJpA8rAl4sV/JdPfU9nZs3VqOwGIgizICvuN2ru6fMd+4llL0tar18UYJXfZ/TWtmhUjA==",
+      "dev": true,
+      "dependencies": {
+        "safe-buffer": "~5.1.1"
+      }
+    },
     "node_modules/cosmiconfig": {
       "version": "7.0.1",
       "resolved": "https://registry.npmjs.org/cosmiconfig/-/cosmiconfig-7.0.1.tgz",
@@ -855,6 +923,15 @@
         "node": ">=0.4"
       }
     },
+    "node_modules/escalade": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.1.tgz",
+      "integrity": "sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/escape-string-regexp": {
       "version": "1.0.5",
       "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
@@ -1255,6 +1332,22 @@
         "node": ">=8"
       }
     },
+    "node_modules/find-up": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/find-up/-/find-up-5.0.0.tgz",
+      "integrity": "sha512-78/PXT1wlLLDgTzDs7sjq9hzz0vXD+zn+7wypEe4fXQxCmdmqfGsEPQxmiCSQI3ajFV91bVSsvNtrJRiW6nGng==",
+      "dev": true,
+      "dependencies": {
+        "locate-path": "^6.0.0",
+        "path-exists": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/flat-cache": {
       "version": "3.0.4",
       "integrity": "sha512-dm9s5Pw7Jc0GvMYbshN6zchCA9RgQlzzEZX3vylR9IqFfS8XciblUXOKfW6SiuJ0e13eDYZoZV5wdrev7P3Nwg==",
@@ -1272,6 +1365,19 @@
       "integrity": "sha512-JaTY/wtrcSyvXJl4IMFHPKyFur1sE9AUqc0QnhOaJ0CxHtAoIV8pYDzeEfAaNEtGkOfq4gr3LBFmdXW5mOQFnA==",
       "dev": true
     },
+    "node_modules/foreground-child": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/foreground-child/-/foreground-child-2.0.0.tgz",
+      "integrity": "sha512-dCIq9FpEcyQyXKCkyzmlPTFNgrCzPudOe+mhvJU5zAtlBnGVy2yKxtfsxK2tQBThwq225jcvBjpw1Gr40uzZCA==",
+      "dev": true,
+      "dependencies": {
+        "cross-spawn": "^7.0.0",
+        "signal-exit": "^3.0.2"
+      },
+      "engines": {
+        "node": ">=8.0.0"
+      }
+    },
     "node_modules/fs.realpath": {
       "version": "1.0.0",
       "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
@@ -1289,6 +1395,15 @@
         "is-property": "^1.0.2"
       }
     },
+    "node_modules/get-caller-file": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
+      "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==",
+      "dev": true,
+      "engines": {
+        "node": "6.* || 8.* || >= 10.*"
+      }
+    },
     "node_modules/get-own-enumerable-property-symbols": {
       "version": "3.0.2",
       "integrity": "sha512-I0UBV/XOz1XkIJHEUDMZAbzCThU/H8DxmSfmdGcKPnVhu2VfFqr34jr9777IyaTYvxjedWhqVIilEDsCdP5G6g==",
@@ -1390,6 +1505,12 @@
       "integrity": "sha1-CH4fELBGky/IWU3Z5tN4r8nR5aw=",
       "dev": true
     },
+    "node_modules/html-escaper": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-2.0.2.tgz",
+      "integrity": "sha512-H2iMtd0I4Mt5eYiapRdIDjp+XzelXQ0tFE4JS7YFwFevXXMmOp9myNrUvCg0D6ws8iqkRPBfKHgbwig1SmlLfg==",
+      "dev": true
+    },
     "node_modules/human-signals": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/human-signals/-/human-signals-2.1.0.tgz",
@@ -1604,6 +1725,63 @@
       "integrity": "sha1-6PvzdNxVb/iUehDcsFctYz8s+hA=",
       "dev": true
     },
+    "node_modules/istanbul-lib-coverage": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-3.0.2.tgz",
+      "integrity": "sha512-o5+eTUYzCJ11/+JhW5/FUCdfsdoYVdQ/8I/OveE2XsjehYn5DdeSnNQAbjYaO8gQ6hvGTN6GM6ddQqpTVG5j8g==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/istanbul-lib-report": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-report/-/istanbul-lib-report-3.0.0.tgz",
+      "integrity": "sha512-wcdi+uAKzfiGT2abPpKZ0hSU1rGQjUQnLvtY5MpQ7QCTahD3VODhcu4wcfY1YtkGaDD5yuydOLINXsfbus9ROw==",
+      "dev": true,
+      "dependencies": {
+        "istanbul-lib-coverage": "^3.0.0",
+        "make-dir": "^3.0.0",
+        "supports-color": "^7.1.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/istanbul-lib-report/node_modules/has-flag": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/istanbul-lib-report/node_modules/supports-color": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+      "dev": true,
+      "dependencies": {
+        "has-flag": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/istanbul-reports": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.0.5.tgz",
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       "integrity": "sha512-I0UBV/XOz1XkIJHEUDMZAbzCThU/H8DxmSfmdGcKPnVhu2VfFqr34jr9777IyaTYvxjedWhqVIilEDsCdP5G6g==",
@@ -3749,6 +4195,12 @@
       "integrity": "sha1-CH4fELBGky/IWU3Z5tN4r8nR5aw=",
       "dev": true
     },
+    "html-escaper": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-2.0.2.tgz",
+      "integrity": "sha512-H2iMtd0I4Mt5eYiapRdIDjp+XzelXQ0tFE4JS7YFwFevXXMmOp9myNrUvCg0D6ws8iqkRPBfKHgbwig1SmlLfg==",
+      "dev": true
+    },
     "human-signals": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/human-signals/-/human-signals-2.1.0.tgz",
@@ -3896,6 +4348,50 @@
       "integrity": "sha1-6PvzdNxVb/iUehDcsFctYz8s+hA=",
       "dev": true
     },
+    "istanbul-lib-coverage": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-3.0.2.tgz",
+      "integrity": "sha512-o5+eTUYzCJ11/+JhW5/FUCdfsdoYVdQ/8I/OveE2XsjehYn5DdeSnNQAbjYaO8gQ6hvGTN6GM6ddQqpTVG5j8g==",
+      "dev": true
+    },
+    "istanbul-lib-report": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-report/-/istanbul-lib-report-3.0.0.tgz",
+      "integrity": "sha512-wcdi+uAKzfiGT2abPpKZ0hSU1rGQjUQnLvtY5MpQ7QCTahD3VODhcu4wcfY1YtkGaDD5yuydOLINXsfbus9ROw==",
+      "dev": true,
+      "requires": {
+        "istanbul-lib-coverage": "^3.0.0",
+        "make-dir": "^3.0.0",
+        "supports-color": "^7.1.0"
+      },
+      "dependencies": {
+        "has-flag": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+          "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
+          "dev": true
+        },
+        "supports-color": {
+          "version": "7.2.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+          "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^4.0.0"
+          }
+        }
+      }
+    },
+    "istanbul-reports": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.0.5.tgz",
+      "integrity": "sha512-5+19PlhnGabNWB7kOFnuxT8H3T/iIyQzIbQMxXsURmmvKg86P2sbkrGOT77VnHw0Qr0gc2XzRaRfMZYYbSQCJQ==",
+      "dev": true,
+      "requires": {
+        "html-escaper": "^2.0.0",
+        "istanbul-lib-report": "^3.0.0"
+      }
+    },
     "js-tokens": {
       "version": "4.0.0",
       "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==",
@@ -4005,6 +4501,15 @@
         "wrap-ansi": "^7.0.0"
       }
     },
+    "locate-path": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-6.0.0.tgz",
+      "integrity": "sha512-iPZK6eYjbxRu3uB4/WZ3EsEIMJFMqAoopl3R+zuq0UjcAm/MO6KCweDgPfP3elTztoKP3KtnVHxTn2NHBSDVUw==",
+      "dev": true,
+      "requires": {
+        "p-locate": "^5.0.0"
+      }
+    },
     "lodash": {
       "version": "4.17.21",
       "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
@@ -4086,6 +4591,23 @@
         "yallist": "^4.0.0"
       }
     },
+    "make-dir": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-3.1.0.tgz",
+      "integrity": "sha512-g3FeP20LNwhALb/6Cz6Dd4F2ngze0jz7tbzrD2wAV+o9FeNHe4rL+yK2md0J/fiSf1sa1ADhXqi5+oVwOM/eGw==",
+      "dev": true,
+      "requires": {
+        "semver": "^6.0.0"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
+          "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
+          "dev": true
+        }
+      }
+    },
     "mdast-util-from-markdown": {
       "version": "0.8.5",
       "resolved": "https://registry.npmjs.org/mdast-util-from-markdown/-/mdast-util-from-markdown-0.8.5.tgz",
@@ -4237,6 +4759,24 @@
         "word-wrap": "^1.2.3"
       }
     },
+    "p-limit": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-3.1.0.tgz",
+      "integrity": "sha512-TYOanM3wGwNGsZN2cVTYPArw454xnXj5qmWF1bEoAc4+cU/ol7GVh7odevjp1FNHduHc3KZMcFduxU5Xc6uJRQ==",
+      "dev": true,
+      "requires": {
+        "yocto-queue": "^0.1.0"
+      }
+    },
+    "p-locate": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-5.0.0.tgz",
+      "integrity": "sha512-LaNjtRWUBY++zB5nE/NwcaoMylSPk+S+ZHNB1TzdbMJMny6dynpAGt7X/tl/QYq3TIeE6nxHppbo2LGymrG5Pw==",
+      "dev": true,
+      "requires": {
+        "p-limit": "^3.0.2"
+      }
+    },
     "p-map": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/p-map/-/p-map-4.0.0.tgz",
@@ -4280,6 +4820,12 @@
         "lines-and-columns": "^1.1.6"
       }
     },
+    "path-exists": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
+      "integrity": "sha512-ak9Qy5Q7jYb2Wwcey5Fpvg2KoAc/ZIhLSLOSBmRmygPsGwkVVt0fZa0qrtMz+m6tJTAHfZQ8FnmB4MG4LWy7/w==",
+      "dev": true
+    },
     "path-is-absolute": {
       "version": "1.0.1",
       "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
@@ -4370,6 +4916,12 @@
       "integrity": "sha512-ZOIzd8yVsQQA7j8GCSlPGXwg5PfmA1mrq0JP4nGhh54LaKN3xdai/vHUDu74pKwV8OxseMS65u2NImosQcSD0Q==",
       "dev": true
     },
+    "require-directory": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
+      "integrity": "sha1-jGStX9MNqxyXbiNE/+f3kqam30I=",
+      "dev": true
+    },
     "require-from-string": {
       "version": "2.0.2",
       "integrity": "sha512-Xf0nWe6RseziFMu+Ap9biiUbmplq6S9/p+7w7YXP/JBHhrUDDUhwa+vANyubuqfZWTveU//DYVGsDG7RKL/vEw==",
@@ -4420,6 +4972,12 @@
         "tslib": "^1.9.0"
       }
     },
+    "safe-buffer": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
+      "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+      "dev": true
+    },
     "safer-buffer": {
       "version": "2.1.2",
       "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
@@ -4499,6 +5057,12 @@
         }
       }
     },
+    "source-map": {
+      "version": "0.7.3",
+      "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.7.3.tgz",
+      "integrity": "sha512-CkCj6giN3S+n9qrYiBTX5gystlENnRW5jZeNLHpe6aue+SrHcG5VYwujhW9s4dY31mEGsxBDrHR6oI69fTXsaQ==",
+      "dev": true
+    },
     "sprintf-js": {
       "version": "1.0.3",
       "integrity": "sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=",
@@ -4596,6 +5160,17 @@
         }
       }
     },
+    "test-exclude": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-6.0.0.tgz",
+      "integrity": "sha512-cAGWPIyOHU6zlmg88jwm7VRyXnMN7iV68OGAbYDk/Mh/xC/pzVPlQtY6ngoIH/5/tciuhGfvESU8GrHrcxD56w==",
+      "dev": true,
+      "requires": {
+        "@istanbuljs/schema": "^0.1.2",
+        "glob": "^7.1.4",
+        "minimatch": "^3.0.4"
+      }
+    },
     "text-table": {
       "version": "0.2.0",
       "integrity": "sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=",
@@ -4671,6 +5246,17 @@
       "integrity": "sha512-8OQ9CL+VWyt3JStj7HX7/ciTL2V3Rl1Wf5OL+SNTm0yK1KvtReVulksyeRnCANHHuUxHlQig+JJDlUhBt1NQDQ==",
       "dev": true
     },
+    "v8-to-istanbul": {
+      "version": "8.1.0",
+      "resolved": "https://registry.npmjs.org/v8-to-istanbul/-/v8-to-istanbul-8.1.0.tgz",
+      "integrity": "sha512-/PRhfd8aTNp9Ggr62HPzXg2XasNFGy5PBt0Rp04du7/8GNNSgxFL6WBTkgMKSL9bFjH+8kKEG3f37FmxiTqUUA==",
+      "dev": true,
+      "requires": {
+        "@types/istanbul-lib-coverage": "^2.0.1",
+        "convert-source-map": "^1.6.0",
+        "source-map": "^0.7.3"
+      }
+    },
     "which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -4732,6 +5318,12 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
+    "y18n": {
+      "version": "5.0.8",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
+      "integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==",
+      "dev": true
+    },
     "yallist": {
       "version": "4.0.0",
       "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
@@ -4741,6 +5333,33 @@
       "resolved": "https://registry.npmjs.org/yaml/-/yaml-1.10.2.tgz",
       "integrity": "sha512-r3vXyErRCYJ7wg28yvBY5VSoAF8ZvlcW9/BwUzEtUsjvX/DKs24dIkuwjtuprwJJHsbyUbLApepYTR1BN4uHrg==",
       "dev": true
+    },
+    "yargs": {
+      "version": "16.2.0",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-16.2.0.tgz",
+      "integrity": "sha512-D1mvvtDG0L5ft/jGWkLpG1+m0eQxOfaBvTNELraWj22wSVUMWxZUvYgJYcKh6jGGIkJFhH4IZPQhR4TKpc8mBw==",
+      "dev": true,
+      "requires": {
+        "cliui": "^7.0.2",
+        "escalade": "^3.1.1",
+        "get-caller-file": "^2.0.5",
+        "require-directory": "^2.1.1",
+        "string-width": "^4.2.0",
+        "y18n": "^5.0.5",
+        "yargs-parser": "^20.2.2"
+      }
+    },
+    "yargs-parser": {
+      "version": "20.2.9",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.9.tgz",
+      "integrity": "sha512-y11nGElTIV+CT3Zv9t7VKl+Q3hTQoT9a1Qzezhhl6Rp21gJ/IVTW7Z3y9EWXhuUBC2Shnf+DX0antecpAwSP8w==",
+      "dev": true
+    },
+    "yocto-queue": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
+      "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==",
+      "dev": true
     }
   }
 }
diff --git a/package.json b/package.json
index c3f3e50829..39655739b9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mysql2",
-  "version": "2.3.2",
+  "version": "2.3.3",
   "description": "fast mysql driver. Implements core protocol, prepared statements, ssl and compression in native JS",
   "main": "index.js",
   "directories": {
@@ -11,6 +11,7 @@
     "lint:code": "eslint index.js promise.js \"lib/**/*.js\" \"test/**/*.js\" \"benchmarks/**/*.js\"",
     "lint:docs": "eslint Contributing.md \"documentation/**/*.md\" \"examples/*.js\"",
     "test": "node ./test/run.js",
+    "coverage-test": "c8 -r cobertura -r lcov -r text node ./test/run.js",
     "benchmark": "node ./benchmarks/benchmark.js",
     "prettier": "prettier --single-quote --trailing-comma none --write \"{lib,examples,test}/**/*.js\"",
     "prettier:docs": "prettier --single-quote --trailing-comma none --write README.md documentation/*",
@@ -66,6 +67,7 @@
     "@typescript-eslint/parser": "^4.33.0",
     "assert-diff": "^3.0.2",
     "benchmark": "^2.1.4",
+    "c8": "^7.10.0",
     "error-stack-parser": "^2.0.3",
     "eslint": "^7.32.0",
     "eslint-config-prettier": "^8.3.0",
diff --git a/test/integration/connection/test-typecast.js b/test/integration/connection/test-typecast.js
index 8dd82812d0..db5a741abe 100644
--- a/test/integration/connection/test-typecast.js
+++ b/test/integration/connection/test-typecast.js
@@ -11,7 +11,9 @@ connection.query(
   {
     sql: 'select "foo uppercase" as foo',
     typeCast: function(field, next) {
+      assert.equal("number", typeof field.length);
       if (field.type === 'VAR_STRING') {
+
         return field.string().toUpperCase();
       }
       return next();
diff --git a/test/unit/packets/test-column-definition.js b/test/unit/packets/test-column-definition.js
index 00d6320145..6af03d3804 100644
--- a/test/unit/packets/test-column-definition.js
+++ b/test/unit/packets/test-column-definition.js
@@ -52,24 +52,28 @@ assert.equal(
 );
 
 // Spec (from example: https://dev.mysql.com/doc/internals/en/protocoltext-resultset.html)
-packet = ColumnDefinition.toPacket(
-  {
-    catalog: 'def',
-    schema: '',
-    name: '@@version_comment',
-    orgName: '',
-    table: '',
-    orgTable: '',
+const inputColDef = {
+  catalog: 'def',
+  schema: '',
+  name: '@@version_comment',
+  orgName: '',
+  table: '',
+  orgTable: '',
 
-    characterSet: 0x08, // latin1_swedish_ci
-    columnLength: 0x1c,
-    flags: 0,
-    columnType: 0xfd,
-    decimals: 0x1f
-  },
-  sequenceId
-);
+  characterSet: 0x08, // latin1_swedish_ci
+  columnLength: 0x1c,
+  flags: 0,
+  columnType: 0xfd,
+  decimals: 0x1f
+}
+packet = ColumnDefinition.toPacket(inputColDef, sequenceId);
 assert.equal(
   packet.buffer.toString('hex', 4),
   '0364656600000011404076657273696f6e5f636f6d6d656e74000c08001c000000fd00001f0000'
 );
+
+packet.offset = 4;
+const colDef = new ColumnDefinition(packet, "utf8");
+const inspect = colDef.inspect();
+assert.deepEqual(inspect, inputColDef);
+assert.equal(colDef.db, inputColDef.schema);