fix error parsing definer

src/parser.ts

@@ -1047,7 +1047,9 @@ function stateMachineStatementParser(
       }
 
       if (statement.definer !== undefined && statement.definer > 0) {
-        if (statement.definer === 1 && prevToken?.type === 'whitespace') {
+        // Enter consume mode once the user@host begins, with or without a
+        // whitespace separating it from "=".
+        if (statement.definer === 1) {
           statement.definer++;
           setPrevToken(token);
           return;

test/parser/mysql.spec.ts

@@ -0,0 +1,53 @@
+import { parse } from '../../src/parser';
+import { expect } from 'chai';
+
+describe('Parser for MySQL', () => {
+  it('parses a CREATE PROCEDURE query with DEFINER user_name@host_name', () => {
+    const sql =
+      'CREATE DEFINER=`example_user`@`%` PROCEDURE test_proc()\n' +
+      'BEGIN\n' +
+      '    SELECT 1;\n' +
+      'END;';
+
+    const result = parse(sql, true, 'mysql');
+    expect(result.body.length).to.eql(1);
+    expect(result.body[0].type).to.eql('CREATE_PROCEDURE');
+    expect(result.body[0].executionType).to.eql('MODIFICATION');
+
+    const sql2 =
+      'CREATE DEFINER=`example_user`@`%` PROCEDURE test_proc()\n' +
+      'BEGIN\n' +
+      '    SELECT 1;\n' +
+      'END;\n' +
+      `SELECT 1 as one;`;
+
+    const result2 = parse(sql2, true, 'mysql');
+    expect(result2.body.length).to.eql(2);
+  });
+
+  it('parses a CREATE PROCEDURE query with DEFINER=CURRENT_USER', () => {
+    const sql =
+      'CREATE DEFINER=CURRENT_USER PROCEDURE test_proc()\n' +
+      'BEGIN\n' +
+      '    SELECT 1;\n' +
+      'END;';
+
+    const result = parse(sql, true, 'mysql');
+    expect(result.body.length).to.eql(1);
+    expect(result.body[0].type).to.eql('CREATE_PROCEDURE');
+    expect(result.body[0].executionType).to.eql('MODIFICATION');
+  });
+
+  it('parses a CREATE PROCEDURE query with DEFINER=CURRENT_USER()', () => {
+    const sql =
+      'CREATE DEFINER=CURRENT_USER() PROCEDURE test_proc()\n' +
+      'BEGIN\n' +
+      '    SELECT 1;\n' +
+      'END;';
+
+    const result = parse(sql, true, 'mysql');
+    expect(result.body.length).to.eql(1);
+    expect(result.body[0].type).to.eql('CREATE_PROCEDURE');
+    expect(result.body[0].executionType).to.eql('MODIFICATION');
+  });
+});