decrease the requirements for SQLite version using the || operator instead of the concat builtin function available since SQLite 3.44.0+ (November 2023)

Author: andinux

src/cloudsync.c

@@ -371,7 +371,7 @@ char *db_version_build_query (sqlite3 *db) {
                       "combined_query AS ("
                       "SELECT GROUP_CONCAT(part, ' UNION ALL ') || ' UNION SELECT value as version FROM cloudsync_settings WHERE key = ''pre_alter_dbversion''' as full_query FROM query_parts"
                       ") "
-                      "SELECT CONCAT('SELECT max(version) as version FROM (', full_query, ');') FROM combined_query;";
+                      "SELECT 'SELECT max(version) as version FROM (' || full_query || ');' FROM combined_query;";
     return dbutils_text_select(db, sql);
 }
 

src/cloudsync.h

@@ -20,7 +20,7 @@
 extern "C" {
 #endif
 
-#define CLOUDSYNC_VERSION                       "0.8.24"
+#define CLOUDSYNC_VERSION                       "0.8.25"
 
 int sqlite3_cloudsync_init (sqlite3 *db, char **pzErrMsg, const sqlite3_api_routines *pApi);
 int cloudsync_autoinit (void);

src/vtab.c

@@ -160,8 +160,8 @@ char *build_changes_sql (sqlite3 *db, const char *idxs) {
     "        'SELECT tbl, pk, col_name, col_value, col_version, db_version, site_id, cl, seq FROM (' || union_query || ')' "
     "    AS final_string FROM union_query "
     ") "
-    "SELECT concat(final_string, ' ";
-    const char *final_query = ";') FROM final_query;";
+    "SELECT final_string || ' ";
+    const char *final_query = ";' FROM final_query;";
 
     static size_t query_len = 0;
     static size_t final_query_len = 0;