Remove unnecessary concat function, and use UTF8 compatible functions and COLLATE

Author: casab

packages/cubejs-schema-compiler/src/adapter/ClickHouseQuery.js

@@ -16,7 +16,7 @@ class ClickHouseFilter extends BaseFilter {
   likeIgnoreCase(column, not, param, type) {
     const p = (!type || type === 'contains' || type === 'ends') ? '%' : '';
     const s = (!type || type === 'contains' || type === 'starts') ? '%' : '';
-    return `lower(${column}) ${not ? 'NOT' : ''} LIKE CONCAT('${p}', lower(${this.allocateParam(param)}), '${s}')`;
+    return `lowerUTF8(${column}) ${not ? 'NOT' : ''} LIKE lowerUTF8(${p}${this.allocateParam(param)}${s})`;
   }
 
   castParameter() {
@@ -149,6 +149,28 @@ export class ClickHouseQuery extends BaseQuery {
     return `${fieldAlias} ${direction}`;
   }
 
+  orderBy() {
+    //
+    // ClickHouse orders string by bytes, so we need to use COLLATE 'en' to order by string
+    //
+    if (R.isEmpty(this.order)) {
+      return '';
+    }
+
+    const orderByString = R.pipe(
+      R.map(this.orderHashToString),
+      R.reject(R.isNil),
+      R.join(' COLLATE \'en\''),
+      R.join(', ')
+    )(this.order);
+
+    if (!orderByString) {
+      return '';
+    }
+
+    return ` ORDER BY ${orderByString}`;
+  }
+
   groupByClause() {
     if (this.ungrouped) {
       return '';