fix: mysql hasColumn Error.(hasColumn a_id but hasColumn('a_Id') is false) (knex#5148)

Author: KlausBai

lib/dialects/mysql/schema/mysql-compiler.js

@@ -48,8 +48,8 @@ class SchemaCompiler_MySQL extends SchemaCompiler {
       output(resp) {
         return resp.some((row) => {
           return (
-            this.client.wrapIdentifier(row.Field) ===
-            this.client.wrapIdentifier(column)
+            this.client.wrapIdentifier(row.Field.toLowerCase()) ===
+            this.client.wrapIdentifier(column.toLowerCase())
           );
         });
       },

test/integration2/schema/misc.spec.js

@@ -1661,9 +1661,9 @@ describe('Schema (misc)', () => {
               expect(exists).to.equal(true);
             }));
 
-          describe('sqlite only', () => {
+          describe('sqlite and mysql only', () => {
             it('checks whether a column exists without being case sensitive, resolving with a boolean', async function () {
-              if (!isSQLite(knex)) {
+              if (!isSQLite(knex)&& !isMysql(knex)) {
                 return this.skip();
               }