diff --git a/source/main.pas b/source/main.pas
index 4081d515..060ccdd7 100644
--- a/source/main.pas
+++ b/source/main.pas
@@ -4712,7 +4712,8 @@ begin
           then begin
             case DBObj.Connection.Parameters.NetTypeGroup of
               ngMSSQL: Select := Select + ' LEFT(CAST(' + DBObj.Connection.QuoteIdent(c.Name) + ' AS NVARCHAR('+IntToStr(GRIDMAXDATA)+')), ' + IntToStr(GRIDMAXDATA) + '), ';
-              ngMySQL, ngPgSQL: Select := Select + ' LEFT(' + DBObj.Connection.QuoteIdent(c.Name) + ', ' + IntToStr(GRIDMAXDATA) + '), ';
+              ngMySQL: Select := Select + ' LEFT(' + DBObj.Connection.QuoteIdent(c.Name) + ', ' + IntToStr(GRIDMAXDATA) + '), ';
+              ngPgSQL: Select := Select + ' SUBSTR(' + DBObj.Connection.QuoteIdent(c.Name) + ', 0, ' + IntToStr(GRIDMAXDATA) + '), ';
             end;
           end else if DBObj.Connection.Parameters.IsMSSQL
             and (c.DataType.Index=dtTimestamp)