diff --git a/pegjs/mariadb.pegjs b/pegjs/mariadb.pegjs
index 85daabed..0ba14e9e 100644
--- a/pegjs/mariadb.pegjs
+++ b/pegjs/mariadb.pegjs
@@ -2504,7 +2504,7 @@ primary
 
 column_ref
   = tbl:(ident_name / backticks_quoted_ident) __ DOT __ col:column_without_kw {
-      columnList.add(`select::${tbl}::${col}`);
+      // columnList.add(`select::${tbl}::${col}`);
       return {
         type: 'column_ref',
         table: tbl,
@@ -2512,7 +2512,7 @@ column_ref
       };
   }
   / col:column {
-      columnList.add(`select::null::${col}`);
+      // columnList.add(`select::null::${col}`);
       return {
         type: 'column_ref',
         table: null,
diff --git a/src/column.js b/src/column.js
index 9f48c8c9..9e84b20b 100644
--- a/src/column.js
+++ b/src/column.js
@@ -8,6 +8,7 @@ import {
   commonOptionConnector,
   commonTypeValue,
   commentToSQL,
+  getParserOpt,
   hasVal,
   identifierToSql,
   literalToSQL,
@@ -88,10 +89,11 @@ function columnOption(definition) {
     const { type, value } = defaultOpt
     columnOpt.push(type.toUpperCase(), exprToSQL(value))
   }
+  const { database } = getParserOpt()
   columnOpt.push(constraintDefinitionToSQL(check))
   columnOpt.push(autoIncrementToSQL(autoIncrement), toUpper(primaryKey), toUpper(uniqueKey), commentToSQL(comment))
   columnOpt.push(...commonTypeValue(characterSet))
-  columnOpt.push(...commonTypeValue(collate))
+  if (database !== 'sqlite') columnOpt.push(...commonTypeValue(collate))
   columnOpt.push(...commonTypeValue(columnFormat))
   columnOpt.push(...commonTypeValue(storage))
   columnOpt.push(...columnReferenceDefinitionToSQL(referenceDefinition))
diff --git a/src/constrain.js b/src/constrain.js
index 0f0dd40b..75a9bc3c 100644
--- a/src/constrain.js
+++ b/src/constrain.js
@@ -1,7 +1,8 @@
 import {
   identifierToSql,
-  toUpper,
+  getParserOpt,
   hasVal,
+  toUpper,
 } from './util'
 import { indexTypeAndOptionToSQL } from './index-definition'
 import { columnReferenceDefinitionToSQL } from './column'
@@ -17,10 +18,13 @@ function constraintDefinitionToSQL(constraintDefinition) {
     reference_definition: referenceDefinition,
   } = constraintDefinition
   const constraintSQL = []
+  const { database } = getParserOpt()
   constraintSQL.push(toUpper(keyword))
   constraintSQL.push(identifierToSql(constraint))
-  constraintSQL.push(toUpper(constraintType))
-  constraintSQL.push(identifierToSql(index))
+  let constraintTypeStr = toUpper(constraintType)
+  if (database === 'sqlite' && constraintTypeStr === 'UNIQUE KEY') constraintTypeStr = 'UNIQUE'
+  constraintSQL.push(constraintTypeStr)
+  constraintSQL.push(database !== 'sqlite' && identifierToSql(index))
   constraintSQL.push(...indexTypeAndOptionToSQL(constraintDefinition))
   constraintSQL.push(...columnReferenceDefinitionToSQL(referenceDefinition))
   constraintSQL.push(toUpper(enforced))
diff --git a/src/util.js b/src/util.js
index d05648e2..7640ee29 100644
--- a/src/util.js
+++ b/src/util.js
@@ -355,6 +355,6 @@ export {
   columnOrderListToSQL, commonKeywordArgsToSQL, commonOptionConnector,
   connector, commonTypeValue,commentToSQL, createBinaryExpr,
   createValueExpr, dataTypeToSQL, DEFAULT_OPT, escape, literalToSQL, columnIdentifierToSql,
-  identifierToSql, onPartitionsToSQL, replaceParams, returningToSQL,
+  getParserOpt, identifierToSql, onPartitionsToSQL, replaceParams, returningToSQL,
   hasVal, setParserOpt, toUpper, topToSQL, triggerEventToSQL,
 }
diff --git a/test/sqlite.spec.js b/test/sqlite.spec.js
index 8cc5253f..c1e8ed49 100644
--- a/test/sqlite.spec.js
+++ b/test/sqlite.spec.js
@@ -147,8 +147,11 @@ describe('sqlite', () => {
   })
 
   it('should support sqlify autoincrement to other db', () => {
-    const sql = 'CREATE TABLE IF NOT EXISTS "SampleTable" ( "ID" INTEGER NOT NULL  PRIMARY KEY AUTOINCREMENT UNIQUE, "Name" TEXT NOT NULL);'
-    const ast = parser.astify(sql, DEFAULT_OPT)
+    let sql = 'CREATE TABLE IF NOT EXISTS "SampleTable" ( "ID" INTEGER NOT NULL  PRIMARY KEY AUTOINCREMENT UNIQUE, "Name" TEXT NOT NULL);'
+    let ast = parser.astify(sql, DEFAULT_OPT)
     expect(parser.sqlify(ast, { database: 'mariadb'})).to.be.equal('CREATE TABLE IF NOT EXISTS `SampleTable` (`ID` INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY UNIQUE, `Name` TEXT NOT NULL)')
+    sql = ' CREATE TABLE `Test` (  `id` int(11) NOT NULL,  `name` varchar(255) COLLATE utf8mb4_unicode_520_ci NOT NULL,  PRIMARY KEY (`id`),  UNIQUE KEY `name` (`name`));'
+    ast = parser.astify(sql, { database: 'mariadb' })
+    expect(parser.sqlify(ast, DEFAULT_OPT)).to.be.equal('CREATE TABLE `Test` (`id` INT(11) NOT NULL, `name` VARCHAR(255) NOT NULL, PRIMARY KEY (`id`), UNIQUE (`name`))')
   })
 })