diff --git a/lib/datasource.js b/lib/datasource.js
index f35a7774c..99dfae5e8 100644
--- a/lib/datasource.js
+++ b/lib/datasource.js
@@ -1716,7 +1716,7 @@ DataSource.prototype.discoverSchemas = function(tableName, options, cb) {
 
     columns.forEach(function(item) {
       const propName = nameMapper('column', item.columnName);
-      schema.properties[propName] = {
+      const propertyDetails = {
         type: item.type,
         required: !item.generated && (item.nullable === 'N' || item.nullable === 'NO' ||
           item.nullable === 0 || item.nullable === false),
@@ -1726,7 +1726,16 @@ DataSource.prototype.discoverSchemas = function(tableName, options, cb) {
         precision: item.dataPrecision,
         scale: item.dataScale,
         generated: item.generated || false,
-      };
+      }
+      if (
+        item.indexType === 'BTREE' &&
+        item.indexName !== 'PRIMARY'  &&
+        !item.isForeignKey
+      ) {
+        propertyDetails.index = {unique: true}
+      }
+      schema.properties[propName] = propertyDetails;
+
       if (pks[item.columnName]) {
         schema.properties[propName].id = pks[item.columnName];
       }