Update sql gen. Add support for raw sql in joins select and regular select sections

dist/types/index.d.ts

@@ -640,6 +640,10 @@ export type ServerQueryParam<T extends {
     group?: keyof T | ServerQueryParamGroupBy<T> | (keyof T | ServerQueryParamGroupBy<T>)[];
     countSubQueries?: ServerQueryParamsCount[];
     fullTextSearch?: ServerQueryParamFullTextSearch<T>;
+    /**
+     * Raw SQL to use as select
+     */
+    select_sql?: string;
     [key: string]: any;
 };
 /**
@@ -801,6 +805,10 @@ export type ServerQueryParamsJoin<Table extends string = string, Field extends o
         count?: boolean;
     })[];
     operator?: (typeof ServerQueryOperators)[number];
+    /**
+     * Raw SQL to use as join select
+     */
+    select_sql?: string;
 };
 /**
  * Defines how a root-table field maps to a join-table field in an `ON` clause.

dist/utils/sql-generator.js

@@ -141,7 +141,10 @@ export default function sqlGenerator({ tableName, genObject, dbFullName, count }
         : undefined;
     let queryString = (() => {
         let str = "SELECT";
-        if (genObject?.selectFields?.[0]) {
+        if (genObject?.select_sql) {
+            str += ` ${genObject.select_sql}`;
+        }
+        else if (genObject?.selectFields?.[0]) {
             if (genObject.join) {
                 str += ` ${genObject.selectFields
                     ?.map((fld) => typeof fld == "object"
@@ -212,7 +215,10 @@ export default function sqlGenerator({ tableName, genObject, dbFullName, count }
                         if (existingJoinTableNames.includes(joinTableName))
                             return null;
                         existingJoinTableNames.push(joinTableName);
-                        if (joinObj.selectFields) {
+                        if (joinObj.select_sql) {
+                            return joinObj.select_sql;
+                        }
+                        else if (joinObj.selectFields) {
                             return joinObj.selectFields
                                 .map((selectField) => {
                                 if (typeof selectField == "string") {