feat: don't force send extra_float_digits for PostgreSQL >= 12 (pgjdb…

…c#3432) (pgjdbc#3446)
renovate-bot · Nov 14, 2024 · bbe2a4a · bbe2a4a
1 parent 47fed64
commit bbe2a4a
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/pgjdbc/src/main/java/org/postgresql/core/v3/ConnectionFactoryImpl.java b/pgjdbc/src/main/java/org/postgresql/core/v3/ConnectionFactoryImpl.java
@@ -392,7 +392,11 @@ private List<StartupParam> getParametersForStartup(String user, String database,
 
     if (assumeVersion.getVersionNum() >= ServerVersion.v9_0.getVersionNum()) {
       // User is explicitly telling us this is a 9.0+ server so set properties here:
-      paramList.add(new StartupParam("extra_float_digits", "3"));
+      if (assumeVersion.getVersionNum() < ServerVersion.v12.getVersionNum()) {
+        // extra_float_digits is meaningless in this case starting from v12
+        // see note on https://www.postgresql.org/docs/current/runtime-config-client.html#GUC-EXTRA-FLOAT-DIGITS
+        paramList.add(new StartupParam("extra_float_digits", "3"));
+      }
       String appName = PGProperty.APPLICATION_NAME.getOrDefault(info);
       if (appName != null) {
         paramList.add(new StartupParam("application_name", appName));
@@ -921,7 +925,7 @@ private void runInitialQueries(QueryExecutor queryExecutor, Properties info)
       SetupQueryRunner.run(queryExecutor, "BEGIN", false);
     }
 
-    if (dbVersion >= ServerVersion.v9_0.getVersionNum()) {
+    if (dbVersion >= ServerVersion.v9_0.getVersionNum() && dbVersion < ServerVersion.v12.getVersionNum()) {
       SetupQueryRunner.run(queryExecutor, "SET extra_float_digits = 3", false);
     }