#10742 remove unused method

plugins/org.jkiss.dbeaver.ext.greenplum/src/org/jkiss/dbeaver/ext/greenplum/model/PostgreServerGreenplum.java

@@ -134,8 +134,4 @@ public class PostgreServerGreenplum extends PostgreServerExtensionBase {
         return true;
     }
 
-    @Override
-    public boolean needToTurnOffPreparedStatements() {
-        return true;
-    }
 }

plugins/org.jkiss.dbeaver.ext.postgresql/src/org/jkiss/dbeaver/ext/postgresql/model/PostgreDataSource.java

@@ -208,7 +208,8 @@ public class PostgreDataSource extends JDBCDataSource implements DBSInstanceCont
         } else {
             getServerType().initDefaultSSLConfig(connectionInfo, props);
         }
-        if (getServerType().needToTurnOffPreparedStatements()
+        PostgreServerType serverType = PostgreUtils.getServerType(getContainer().getDriver());
+        if (serverType != null && serverType.turnOffPreparedStatements()
             && !CommonUtils.toBoolean(getContainer().getActualConnectionConfiguration().getProviderProperty(PostgreConstants.PROP_USE_PREPARED_STATEMENTS))) {
             // Turn off prepared statements using, to avoid error: "ERROR: prepared statement "S_1" already exists" from PGBouncer #10742
             props.put("prepareThreshold", "0");

plugins/org.jkiss.dbeaver.ext.postgresql/src/org/jkiss/dbeaver/ext/postgresql/model/PostgreServerExtension.java

@@ -143,7 +143,4 @@ public interface PostgreServerExtension
     boolean supportsBackslashStringEscape();
 
     boolean supportsTypeCategory();
-
-    boolean needToTurnOffPreparedStatements(); // PGBouncer Problems WorkAround
-
 }

plugins/org.jkiss.dbeaver.ext.postgresql/src/org/jkiss/dbeaver/ext/postgresql/model/impls/PostgreServerExtensionBase.java

@@ -469,8 +469,4 @@ public abstract class PostgreServerExtensionBase implements PostgreServerExtensi
         return dataSource.isServerVersionAtLeast(8, 4);
     }
 
-    @Override
-    public boolean needToTurnOffPreparedStatements() {
-        return false;
-    }
 }
\ No newline at end of file

plugins/org.jkiss.dbeaver.ext.postgresql/src/org/jkiss/dbeaver/ext/postgresql/model/impls/PostgreServerPostgreSQL.java

@@ -61,9 +61,4 @@ public class PostgreServerPostgreSQL extends PostgreServerExtensionBase {
         final PostgreSetting setting = dataSource.getSetting(PostgreConstants.OPTION_STANDARD_CONFORMING_STRINGS);
         return setting != null && "off".equals(setting.getValue());
     }
-
-    @Override
-    public boolean needToTurnOffPreparedStatements() {
-        return true;
-    }
 }