Add integration test for specifictype (#4211)

lib/schema/columncompiler.js

@@ -106,6 +106,11 @@ class ColumnCompiler {
     return `decimal(${this._num(precision, 8)}, ${this._num(scale, 2)})`;
   }
 
+  // Used to support custom types
+  specifictype(type) {
+    return type;
+  }
+
   // Modifiers
   // -------
 
@@ -154,7 +159,6 @@ ColumnCompiler.prototype.timestamp = 'timestamp';
 ColumnCompiler.prototype.enu = 'varchar';
 ColumnCompiler.prototype.bit = ColumnCompiler.prototype.json = 'text';
 ColumnCompiler.prototype.uuid = 'char(36)';
-ColumnCompiler.prototype.specifictype = (type) => type;
 ColumnCompiler.prototype.increments =
   'integer not null primary key autoincrement';
 ColumnCompiler.prototype.bigincrements =

test/integration2/schema/custom-type.spec.js

@@ -0,0 +1,57 @@
+const { expect } = require('chai');
+const { getAllDbs, getKnexForDb } = require('../util/knex-instance-provider');
+
+describe('Schema', () => {
+  describe('customType', () => {
+    getAllDbs().forEach((db) => {
+      describe(db, () => {
+        let knex;
+        const tblName = 'table_with_custom_varchar1';
+        const colName = 'varchar_col1';
+
+        before(async () => {
+          knex = getKnexForDb(db);
+          await knex.schema.dropTableIfExists(tblName);
+          await knex.schema.createTable(tblName, (table) => {
+            table.specificType(colName, 'varchar(42)');
+          });
+        });
+
+        after(async () => {
+          await knex.schema.dropTable(tblName);
+          return knex.destroy();
+        });
+
+        it('Allows to specify custom type params', async () => {
+          let res;
+          switch (db) {
+            case 'sqlite3':
+              res = await knex.schema.raw(`PRAGMA table_info(${tblName})`);
+              expect(res.find((c) => c.name === colName).type).to.equal(
+                'varchar(42)'
+              );
+              break;
+            case 'postgres':
+              res = await knex
+                .select(['data_type', 'character_maximum_length'])
+                .from('information_schema.columns')
+                .where({ table_name: tblName, column_name: colName });
+              expect(res[0].data_type).to.equal('character varying');
+              expect(res[0].character_maximum_length).to.equal(42);
+              break;
+            case 'mssql':
+            case 'mysql':
+            case 'mysql2':
+              res = await knex
+                .select(['DATA_TYPE', 'CHARACTER_MAXIMUM_LENGTH'])
+                .from('INFORMATION_SCHEMA.COLUMNS')
+                .where({ table_name: tblName, column_name: colName });
+              expect(res[0].DATA_TYPE).to.equal('varchar');
+              expect(res[0].CHARACTER_MAXIMUM_LENGTH).to.equal(42);
+              break;
+          }
+        });
+      });
+    });
+  });
+});