diff --git a/package-lock.json b/package-lock.json
index 685fee2..9f66e86 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -25,7 +25,7 @@
         "jsonschema": "^1.4.1",
         "jspdf": "^2.5.1",
         "lexical": "^0.12.5",
-        "node-sql-parser": "^4.17.0",
+        "node-sql-parser": "^5.0.0",
         "react": "^18.2.0",
         "react-dom": "^18.2.0",
         "react-hotkeys-hook": "^4.4.1",
@@ -1715,6 +1715,11 @@
         "@babel/types": "^7.20.7"
       }
     },
+    "node_modules/@types/pegjs": {
+      "version": "0.10.6",
+      "resolved": "https://registry.npmjs.org/@types/pegjs/-/pegjs-0.10.6.tgz",
+      "integrity": "sha512-eLYXDbZWXh2uxf+w8sXS8d6KSoXTswfps6fvCUuVAGN8eRpfe7h9eSRydxiSJvo9Bf+GzifsDOr9TMQlmJdmkw=="
+    },
     "node_modules/@types/prop-types": {
       "version": "15.7.11",
       "resolved": "https://registry.npmjs.org/@types/prop-types/-/prop-types-15.7.11.tgz",
@@ -4368,10 +4373,11 @@
       "dev": true
     },
     "node_modules/node-sql-parser": {
-      "version": "4.17.0",
-      "resolved": "https://registry.npmjs.org/node-sql-parser/-/node-sql-parser-4.17.0.tgz",
-      "integrity": "sha512-3IhovpmUBpcETnoKK/KBdkz2mz53kVG5E1dnqz1QuYvtzdxYZW5xaGGEvW9u6Yyy2ivwR3eUZrn9inmEVef02w==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/node-sql-parser/-/node-sql-parser-5.0.0.tgz",
+      "integrity": "sha512-hkNU1gIT8BNe8vmcsU7uYie0gzow/6AIj5KnGRBJQSZlgEu1NNuLVS11it5gAEdpmvJHelc34BwR439Iela+zQ==",
       "dependencies": {
+        "@types/pegjs": "^0.10.0",
         "big-integer": "^1.6.48"
       },
       "engines": {
diff --git a/package.json b/package.json
index 875cdbc..fa19917 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "jsonschema": "^1.4.1",
     "jspdf": "^2.5.1",
     "lexical": "^0.12.5",
-    "node-sql-parser": "^4.17.0",
+    "node-sql-parser": "^5.0.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-hotkeys-hook": "^4.4.1",
diff --git a/src/components/EditorHeader/Modal/ImportSource.jsx b/src/components/EditorHeader/Modal/ImportSource.jsx
index 1b86454..f5283ab 100644
--- a/src/components/EditorHeader/Modal/ImportSource.jsx
+++ b/src/components/EditorHeader/Modal/ImportSource.jsx
@@ -1,7 +1,12 @@
-import { Upload, Checkbox } from "@douyinfe/semi-ui";
+import { Upload, Checkbox, Banner } from "@douyinfe/semi-ui";
 import { STATUS } from "../../../data/constants";
 
-export default function ImportSource({ importData, setImportData, setError }) {
+export default function ImportSource({
+  importData,
+  setImportData,
+  error,
+  setError,
+}) {
   return (
     <div>
       <Upload
@@ -60,6 +65,29 @@ export default function ImportSource({ importData, setImportData, setError }) {
         >
           Overwrite existing diagram
         </Checkbox>
+        <div className="mt-2">
+          {error.type === STATUS.ERROR ? (
+            <Banner
+              type="danger"
+              fullMode={false}
+              description={<div>{error.message}</div>}
+            />
+          ) : error.type === STATUS.OK ? (
+            <Banner
+              type="info"
+              fullMode={false}
+              description={<div>{error.message}</div>}
+            />
+          ) : (
+            error.type === STATUS.WARNING && (
+              <Banner
+                type="warning"
+                fullMode={false}
+                description={<div>{error.message}</div>}
+              />
+            )
+          )}
+        </div>
       </div>
     </div>
   );
diff --git a/src/components/EditorHeader/Modal/Modal.jsx b/src/components/EditorHeader/Modal/Modal.jsx
index 462503b..f2f870b 100644
--- a/src/components/EditorHeader/Modal/Modal.jsx
+++ b/src/components/EditorHeader/Modal/Modal.jsx
@@ -114,9 +114,17 @@ export default function Modal({
     try {
       ast = parser.astify(importSource.src, { database: "MySQL" });
     } catch (err) {
-      Toast.error(
-        "Could not parse the sql file. Make sure there are no syntax errors.",
-      );
+      setError({
+        type: STATUS.ERROR,
+        message:
+          err.name +
+          " [Ln " +
+          err.location.start.line +
+          ", Col " +
+          err.location.start.column +
+          "]: " +
+          err.message,
+      });
       return;
     }
 
@@ -124,6 +132,7 @@ export default function Modal({
     if (importSource.overwrite) {
       setTables(d.tables);
       setRelationships(d.relationships);
+      setTransform((prev) => ({ ...prev, pan: { x: 0, y: 0 } }));
       setNotes([]);
       setAreas([]);
       setTypes([]);
@@ -133,6 +142,7 @@ export default function Modal({
       setTables((prev) => [...prev, ...d.tables]);
       setRelationships((prev) => [...prev, ...d.relationships]);
     }
+    setModal(MODAL.NONE);
   };
 
   const createNewDiagram = (id) => {
@@ -167,7 +177,6 @@ export default function Modal({
         return;
       case MODAL.IMPORT_SRC:
         parseSQLAndLoadDiagram();
-        setModal(MODAL.NONE);
         return;
       case MODAL.OPEN:
         if (selectedDiagramId === 0) return;
@@ -207,6 +216,7 @@ export default function Modal({
           <ImportSource
             importData={importSource}
             setImportData={setImportSource}
+            error={error}
             setError={setError}
           />
         );
diff --git a/src/components/EditorSidePanel/TablesTab/FieldDetails.jsx b/src/components/EditorSidePanel/TablesTab/FieldDetails.jsx
index 30b7e33..ae574ba 100644
--- a/src/components/EditorSidePanel/TablesTab/FieldDetails.jsx
+++ b/src/components/EditorSidePanel/TablesTab/FieldDetails.jsx
@@ -80,7 +80,7 @@ export default function FieldDetails({ data, tid, index }) {
                   undo: editField,
                   redo: { values: data.values },
                   message: `Edit table field values to "${JSON.stringify(
-                    data.values
+                    data.values,
                   )}"`,
                 },
               ]);
@@ -123,9 +123,11 @@ export default function FieldDetails({ data, tid, index }) {
           <div className="font-semibold">Precision</div>
           <Input
             className="my-2 w-full"
-            placeholder="Set precision: (size, d)"
+            placeholder="Set precision: size, d"
             validateStatus={
-              /^\(\d+,\s*\d+\)$|^$/.test(data.size) ? "default" : "error"
+              !data.size || /^\d+,\s*\d+$|^$/.test(data.size)
+                ? "default"
+                : "error"
             }
             value={data.size}
             onChange={(value) => updateField(tid, index, { size: value })}
diff --git a/src/components/EditorSidePanel/TablesTab/TableField.jsx b/src/components/EditorSidePanel/TablesTab/TableField.jsx
index 71db783..7ffe2da 100644
--- a/src/components/EditorSidePanel/TablesTab/TableField.jsx
+++ b/src/components/EditorSidePanel/TablesTab/TableField.jsx
@@ -123,7 +123,7 @@ export default function TableField({ data, tid, index }) {
       <Col span={3}>
         <Button
           type={data.notNull ? "primary" : "tertiary"}
-          title="Nullable"
+          title="Not Null"
           theme={data.notNull ? "solid" : "light"}
           onClick={() => {
             setUndoStack((prev) => [
diff --git a/src/utils/astToDiagram.js b/src/utils/astToDiagram.js
index 2742219..92991ad 100644
--- a/src/utils/astToDiagram.js
+++ b/src/utils/astToDiagram.js
@@ -1,9 +1,49 @@
-import { Cardinality } from "../data/constants";
+import {
+  Cardinality,
+  tableColorStripHeight,
+  tableFieldHeight,
+  tableHeaderHeight,
+} from "../data/constants";
+
+function buildSQLFromAST(ast) {
+  if (ast.type === "binary_expr") {
+    const leftSQL = buildSQLFromAST(ast.left);
+    const rightSQL = buildSQLFromAST(ast.right);
+    return `${leftSQL} ${ast.operator} ${rightSQL}`;
+  }
+
+  if (ast.type === "function") {
+    let expr = "";
+    expr = ast.name;
+    if (ast.args) {
+      expr +=
+        "(" +
+        ast.args.value
+          .map((v) => {
+            if (v.type === "column_ref") return "`" + v.column + "`";
+            if (
+              v.type === "single_quote_string" ||
+              v.type === "double_quote_string"
+            )
+              return "'" + v.value + "'";
+            return v.value;
+          })
+          .join(", ") +
+        ")";
+    }
+    return expr;
+  } else if (ast.type === "column_ref") {
+    return "`" + ast.column + "`";
+  } else if (ast.type === "expr_list") {
+    return ast.value.map((v) => v.value).join(" AND ");
+  } else {
+    return typeof ast.value === "string" ? "'" + ast.value + "'" : ast.value;
+  }
+}
 
 export function astToDiagram(ast) {
   const tables = [];
   const relationships = [];
-  const inlineForeignKeys = [];
 
   ast.forEach((e) => {
     if (e.type === "create") {
@@ -14,13 +54,15 @@ export function astToDiagram(ast) {
         table.color = "#175e7a";
         table.fields = [];
         table.indices = [];
-        table.x = 0;
-        table.y = 0;
+        table.id = tables.length;
         e.create_definitions.forEach((d) => {
           if (d.resource === "column") {
             const field = {};
             field.name = d.column.column;
             field.type = d.definition.dataType;
+            if (d.definition.expr && d.definition.expr.type === "expr_list") {
+              field.values = d.definition.expr.value.map((v) => v.value);
+            }
             field.comment = "";
             field.unique = false;
             if (d.unique) field.unique = true;
@@ -31,39 +73,42 @@ export function astToDiagram(ast) {
             field.primary = false;
             if (d.primary_key) field.primary = true;
             field.default = "";
-            if (d.default_val) field.default = d.default_val.value.value.toString();
-            if (d.definition["length"]) field.size = d.definition["length"];
+            if (d.default_val) {
+              let defaultValue = "";
+              if (d.default_val.value.type === "function") {
+                defaultValue = d.default_val.value.name;
+                if (d.default_val.value.args) {
+                  defaultValue +=
+                    "(" +
+                    d.default_val.value.args.value
+                      .map((v) => {
+                        if (
+                          v.type === "single_quote_string" ||
+                          v.type === "double_quote_string"
+                        )
+                          return "'" + v.value + "'";
+                        return v.value;
+                      })
+                      .join(", ") +
+                    ")";
+                }
+              } else if (d.default_val.value.type === "null") {
+                defaultValue = "NULL";
+              } else {
+                defaultValue = d.default_val.value.value.toString();
+              }
+              field.default = defaultValue;
+            }
+            if (d.definition["length"]) {
+              if (d.definition.scale) {
+                field.size = d.definition["length"] + "," + d.definition.scale;
+              } else {
+                field.size = d.definition["length"];
+              }
+            }
             field.check = "";
             if (d.check) {
-              let check = "";
-              if (d.check.definition[0].left.column) {
-                let value = d.check.definition[0].right.value;
-                if (
-                  d.check.definition[0].right.type === "double_quote_string" ||
-                  d.check.definition[0].right.type === "single_quote_string"
-                )
-                  value = "'" + value + "'";
-                check =
-                  d.check.definition[0].left.column +
-                  " " +
-                  d.check.definition[0].operator +
-                  " " +
-                  value;
-              } else {
-                let value = d.check.definition[0].right.value;
-                if (
-                  d.check.definition[0].left.type === "double_quote_string" ||
-                  d.check.definition[0].left.type === "single_quote_string"
-                )
-                  value = "'" + value + "'";
-                check =
-                  value +
-                  " " +
-                  d.check.definition[0].operator +
-                  " " +
-                  d.check.definition[0].right.column;
-              }
-              field.check = check;
+              field.check = buildSQLFromAST(d.check.definition[0]);
             }
 
             table.fields.push(field);
@@ -77,17 +122,58 @@ export function astToDiagram(ast) {
                 });
               });
             } else if (d.constraint_type === "FOREIGN KEY") {
-              inlineForeignKeys.push({ ...d, startTable: e.table[0].table });
+              const relationship = {};
+              const startTableId = table.id;
+              const startTable = e.table[0].table;
+              const startField = d.definition[0].column;
+              const endTable = d.reference_definition.table[0].table;
+              const endField = d.reference_definition.definition[0].column;
+
+              const endTableId = tables.findIndex((t) => t.name === endTable);
+              if (endTableId === -1) return;
+
+              const endFieldId = tables[endTableId].fields.findIndex(
+                (f) => f.name === endField,
+              );
+              if (endField === -1) return;
+
+              const startFieldId = table.fields.findIndex(
+                (f) => f.name === startField,
+              );
+              if (startFieldId === -1) return;
+
+              relationship.name = startTable + "_" + startField + "_fk";
+              relationship.startTableId = startTableId;
+              relationship.endTableId = endTableId;
+              relationship.endFieldId = endFieldId;
+              relationship.startFieldId = startFieldId;
+              let updateConstraint = "No action";
+              let deleteConstraint = "No action";
+              d.reference_definition.on_action.forEach((c) => {
+                if (c.type === "on update") {
+                  updateConstraint = c.value.value;
+                  updateConstraint =
+                    updateConstraint[0].toUpperCase() +
+                    updateConstraint.substring(1);
+                } else if (c.type === "on delete") {
+                  deleteConstraint = c.value.value;
+                  deleteConstraint =
+                    deleteConstraint[0].toUpperCase() +
+                    deleteConstraint.substring(1);
+                }
+              });
+
+              relationship.updateConstraint = updateConstraint;
+              relationship.deleteConstraint = deleteConstraint;
+              relationship.cardinality = Cardinality.ONE_TO_ONE;
+              relationships.push(relationship);
             }
           }
         });
-        tables.push(table);
-        tables.forEach((e, i) => {
-          e.id = i;
-          e.fields.forEach((f, j) => {
-            f.id = j;
-          });
+        table.fields.forEach((f, j) => {
+          f.id = j;
         });
+        tables.push(table);
       } else if (e.keyword === "index") {
         const index = {};
         index.name = e.index;
@@ -108,145 +194,89 @@ export function astToDiagram(ast) {
         if (found !== -1) tables[found].indices.forEach((i, j) => (i.id = j));
       }
     } else if (e.type === "alter") {
-      if (
-        e.expr[0].action === "add" &&
-        e.expr[0].create_definitions.constraint_type === "FOREIGN KEY"
-      ) {
-        const relationship = {};
-        const startTable = e.table[0].table;
-        const startField = e.expr[0].create_definitions.definition[0].column;
-        const endTable =
-          e.expr[0].create_definitions.reference_definition.table[0].table;
-        const endField =
-          e.expr[0].create_definitions.reference_definition.definition[0]
-            .column;
-        let updateConstraint = "No action";
-        let deleteConstraint = "No action";
-        e.expr[0].create_definitions.reference_definition.on_action.forEach(
-          (c) => {
-            if (c.type === "on update") {
-              updateConstraint = c.value.value;
-              updateConstraint =
-                updateConstraint[0].toUpperCase() +
-                updateConstraint.substring(1);
-            } else if (c.type === "on delete") {
-              deleteConstraint = c.value.value;
-              deleteConstraint =
-                deleteConstraint[0].toUpperCase() +
-                deleteConstraint.substring(1);
-            }
-          }
-        );
+      e.expr.forEach((expr) => {
+        if (
+          expr.action === "add" &&
+          expr.create_definitions.constraint_type === "FOREIGN KEY"
+        ) {
+          const relationship = {};
+          const startTable = e.table[0].table;
+          const startField = expr.create_definitions.definition[0].column;
+          const endTable =
+            expr.create_definitions.reference_definition.table[0].table;
+          const endField =
+            expr.create_definitions.reference_definition.definition[0].column;
+          let updateConstraint = "No action";
+          let deleteConstraint = "No action";
+          expr.create_definitions.reference_definition.on_action.forEach(
+            (c) => {
+              if (c.type === "on update") {
+                updateConstraint = c.value.value;
+                updateConstraint =
+                  updateConstraint[0].toUpperCase() +
+                  updateConstraint.substring(1);
+              } else if (c.type === "on delete") {
+                deleteConstraint = c.value.value;
+                deleteConstraint =
+                  deleteConstraint[0].toUpperCase() +
+                  deleteConstraint.substring(1);
+              }
+            },
+          );
 
-        let startTableId = -1;
-        let startFieldId = -1;
-        let endTableId = -1;
-        let endFieldId = -1;
+          const startTableId = tables.findIndex((t) => t.name === startTable);
+          if (startTable === -1) return;
 
-        tables.forEach((t) => {
-          if (t.name === startTable) {
-            startTableId = t.id;
-            return;
-          }
+          const endTableId = tables.findIndex((t) => t.name === endTable);
+          if (endTableId === -1) return;
 
-          if (t.name === endTable) {
-            endTableId = t.id;
-          }
-        });
+          const endFieldId = tables[endTableId].fields.findIndex(
+            (f) => f.name === endField,
+          );
+          if (endField === -1) return;
 
-        if (startTableId === -1 || endTableId === -1) return;
+          const startFieldId = tables[startTableId].fields.findIndex(
+            (f) => f.name === startField,
+          );
+          if (startFieldId === -1) return;
 
-        tables[startTableId].fields.forEach((f) => {
-          if (f.name === startField) {
-            startFieldId = f.id;
-            return;
-          }
+          relationship.name = startTable + "_" + startField + "_fk";
+          relationship.startTableId = startTableId;
+          relationship.startFieldId = startFieldId;
+          relationship.endTableId = endTableId;
+          relationship.endFieldId = endFieldId;
+          relationship.updateConstraint = updateConstraint;
+          relationship.deleteConstraint = deleteConstraint;
+          relationship.cardinality = Cardinality.ONE_TO_ONE;
+          relationships.push(relationship);
 
-          if (f.name === endField) {
-            endFieldId = f.id;
-          }
-        });
-
-        if (startFieldId === -1 || endFieldId === -1) return;
-
-        relationship.name = startTable + "_" + startField + "_fk";
-        relationship.startTableId = startTableId;
-        relationship.startFieldId = startFieldId;
-        relationship.endTableId = endTableId;
-        relationship.endFieldId = endFieldId;
-        relationship.updateConstraint = updateConstraint;
-        relationship.deleteConstraint = deleteConstraint;
-        relationship.cardinality = Cardinality.ONE_TO_ONE;
-        relationships.push(relationship);
-
-        relationships.forEach((r, i) => (r.id = i));
-      }
+          relationships.forEach((r, i) => (r.id = i));
+        }
+      });
     }
   });
 
-  inlineForeignKeys.forEach((fk) => {
-    const relationship = {};
-    const startTable = fk.startTable;
-    const startField = fk.definition[0].column;
-    const endTable = fk.reference_definition.table[0].table;
-    const endField = fk.reference_definition.definition[0].column;
-    let updateConstraint = "No action";
-    let deleteConstraint = "No action";
-    fk.reference_definition.on_action.forEach((c) => {
-      if (c.type === "on update") {
-        updateConstraint = c.value.value;
-        updateConstraint =
-          updateConstraint[0].toUpperCase() + updateConstraint.substring(1);
-      } else if (c.type === "on delete") {
-        deleteConstraint = c.value.value;
-        deleteConstraint =
-          deleteConstraint[0].toUpperCase() + deleteConstraint.substring(1);
-      }
-    });
-
-    let startTableId = -1;
-    let startFieldId = -1;
-    let endTableId = -1;
-    let endFieldId = -1;
-
-    tables.forEach((t) => {
-      if (t.name === startTable) {
-        startTableId = t.id;
-        return;
-      }
-
-      if (t.name === endTable) {
-        endTableId = t.id;
-      }
-    });
-
-    if (startTableId === -1 || endTableId === -1) return;
-
-    tables[startTableId].fields.forEach((f) => {
-      if (f.name === startField) {
-        startFieldId = f.id;
-        return;
-      }
-
-      if (f.name === endField) {
-        endFieldId = f.id;
-      }
-    });
-
-    if (startFieldId === -1 || endFieldId === -1) return;
-
-    relationship.name = startTable + "_" + startField + "_fk";
-    relationship.startTableId = startTableId;
-    relationship.startFieldId = startFieldId;
-    relationship.endTableId = endTableId;
-    relationship.endFieldId = endFieldId;
-    relationship.updateConstraint = updateConstraint;
-    relationship.deleteConstraint = deleteConstraint;
-    relationship.cardinality = Cardinality.ONE_TO_ONE;
-    relationships.push(relationship);
-  });
-
   relationships.forEach((r, i) => (r.id = i));
 
+  let maxHeight = -1;
+  const tableWidth = 200;
+  const gapX = 54;
+  const gapY = 40;
+  tables.forEach((table, i) => {
+    if (i < tables.length / 2) {
+      table.x = i * tableWidth + (i + 1) * gapX;
+      table.y = gapY;
+      const height =
+        table.fields.length * tableFieldHeight +
+        tableHeaderHeight +
+        tableColorStripHeight;
+      maxHeight = Math.max(height, maxHeight);
+    } else {
+      const index = tables.length - i - 1;
+      table.x = index * tableWidth + (index + 1) * gapX;
+      table.y = maxHeight + 2 * gapY;
+    }
+  });
+
   return { tables, relationships };
 }
diff --git a/src/utils/issues.js b/src/utils/issues.js
index b95fa74..90e1259 100644
--- a/src/utils/issues.js
+++ b/src/utils/issues.js
@@ -1,4 +1,4 @@
-import { strHasQuotes } from "./utils";
+import { isFunction, strHasQuotes } from "./utils";
 
 function validateDateStr(str) {
   return /^(?!0000)(?!00)(?:(?!0000)[0-9]{4}-(?:(?:0[1-9]|1[0-2])-(?:0[1-9]|1[0-9]|2[0-9]|3[01])|(?:0[1-9]|1[0-2])-(?:0[1-9]|1[0-9]|2[0-8])|(?:0[13-9]|1[0-2])-(?:29|30)|(?:0[13578]|1[02])-31))$/.test(
@@ -9,13 +9,23 @@ function validateDateStr(str) {
 function checkDefault(field) {
   if (field.default === "") return true;
 
+  if (isFunction(field.default)) return true;
+
+  if (!field.notNull && field.default.toLowerCase() === "null") return true;
+
   switch (field.type) {
     case "INT":
     case "BIGINT":
     case "SMALLINT":
       return /^-?\d*$/.test(field.default);
+    case "SET": {
+      const defaultValues = field.default.split(",");
+      for (let i = 0; i < defaultValues.length; i++) {
+        if (!field.values.includes(defaultValues[i].trim())) return false;
+      }
+      return true;
+    }
     case "ENUM":
-    case "SET":
       return field.values.includes(field.default);
     case "CHAR":
     case "VARCHAR":
@@ -30,7 +40,8 @@ function checkDefault(field) {
       );
     case "BOOLEAN":
       return (
-        field.default.trim() === "false" || field.default.trim() === "true"
+        field.default.trim().toLowerCase() === "false" ||
+        field.default.trim().toLowerCase() === "true"
       );
     case "FLOAT":
     case "DECIMAL":
@@ -55,6 +66,9 @@ function checkDefault(field) {
       return parseInt(date[0]) >= 1970 && parseInt(date[0]) <= 2038;
     }
     case "DATETIME": {
+      if (field.default.toUpperCase() === "CURRENT_TIMESTAMP") {
+        return true;
+      }
       if (!/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/.test(field.default)) {
         return false;
       }
@@ -116,12 +130,6 @@ export function getIssues(diagram) {
         );
       }
 
-      if (field.type === "DOUBLE" && field.size !== "") {
-        issues.push(
-          `Specifying number of digits for floating point data types is deprecated.`,
-        );
-      }
-
       if (duplicateFieldNames[field.name]) {
         issues.push(`Duplicate table fields in table "${table.name}"`);
       } else {
@@ -182,12 +190,6 @@ export function getIssues(diagram) {
         }
       }
 
-      if (field.type === "DOUBLE" && field.size !== "") {
-        issues.push(
-          `Specifying number of digits for floating point data types is deprecated.`,
-        );
-      }
-
       if (duplicateFieldNames[field.name]) {
         issues.push(`Duplicate type fields in "${type.name}"`);
       } else {
diff --git a/src/utils/toSQL.js b/src/utils/toSQL.js
index 2327bb0..2ad4961 100644
--- a/src/utils/toSQL.js
+++ b/src/utils/toSQL.js
@@ -1,5 +1,5 @@
 import { sqlDataTypes } from "../data/constants";
-import { strHasQuotes } from "./utils";
+import { isFunction, isKeyword, strHasQuotes } from "./utils";
 
 export function getJsonType(f) {
   if (!sqlDataTypes.includes(f.type)) {
@@ -44,10 +44,7 @@ export function getTypeString(field, dbms = "mysql", baseType = false) {
     if (field.type === "UUID") {
       return `VARCHAR(36)`;
     }
-    if (isSized(field.type)) {
-      return `${field.type}(${field.size})`;
-    }
-    if (hasPrecision(field.type)) {
+    if (hasPrecision(field.type) || isSized(field.type)) {
       return `${field.type}${field.size ? `(${field.size})` : ""}`;
     }
     if (field.type === "SET" || field.type === "ENUM") {
@@ -147,13 +144,16 @@ export function hasQuotes(type) {
 }
 
 export function parseDefault(field) {
-  if (strHasQuotes(field.default)) {
+  if (
+    strHasQuotes(field.default) ||
+    isFunction(field.default) ||
+    isKeyword(field.default) ||
+    !hasQuotes(field.type)
+  ) {
     return field.default;
   }
 
-  return hasQuotes(field.type) && field.default.toLowerCase() !== "null"
-    ? `'${field.default}'`
-    : `${field.default}`;
+  return `'${field.default}'`;
 }
 
 export function jsonToMySQL(obj) {
diff --git a/src/utils/utils.js b/src/utils/utils.js
index 53226a6..a51919f 100644
--- a/src/utils/utils.js
+++ b/src/utils/utils.js
@@ -24,3 +24,13 @@ export function strHasQuotes(str) {
     (str[0] === str[str.length - 1] && str[0] === "`")
   );
 }
+
+const keywords = ["CURRENT_TIMESTAMP", "NULL"];
+
+export function isKeyword(str) {
+  return keywords.includes(str.toUpperCase());
+}
+
+export function isFunction(str) {
+  return /\w+\([^)]*\)$/.test(str);
+}