Merge remote-tracking branch 'origin/5.11' into dev

Change-Id: I9c90d71fde002544fd97df7e8a2690953cf9f817

1 files changed, 7 insertions, 4 deletions

diff --git a/src/plugins/sqldrivers/psql/qsql_psql.cpp b/src/plugins/sqldrivers/psql/qsql_psql.cpp
index 6f105f79ca..368b777ca5 100644
--- a/src/plugins/sqldrivers/psql/qsql_psql.cpp
+++ b/src/plugins/sqldrivers/psql/qsql_psql.cpp
@@ -204,6 +204,7 @@ public:
     void setDatestyle();
     void setByteaOutput();
     void detectBackslashEscape();
+    mutable QHash<int, QString> oidToTable;
 };
 
 void QPSQLDriverPrivate::appendTables(QStringList &tl, QSqlQuery &t, QChar type)
@@ -815,18 +816,20 @@ QSqlRecord QPSQLResult::record() const
             f.setName(QString::fromUtf8(PQfname(d->result, i)));
         else
             f.setName(QString::fromLocal8Bit(PQfname(d->result, i)));
-
+        const int tableOid = PQftable(d->result, i);
+        auto &tableName = d->drv_d_func()->oidToTable[tableOid];
         // WARNING: We cannot execute any other SQL queries on
         // the same db connection while forward-only mode is active
         // (this would discard all results of forward-only query).
         // So we just skip this...
-        if (!isForwardOnly()) {
+        if (tableName.isEmpty() && !isForwardOnly()) {
             QSqlQuery qry(driver()->createResult());
             if (qry.exec(QStringLiteral("SELECT relname FROM pg_class WHERE pg_class.oid = %1")
-                         .arg(PQftable(d->result, i))) && qry.next()) {
-                f.setTableName(qry.value(0).toString());
+                         .arg(tableOid)) && qry.next()) {
+                tableName = qry.value(0).toString();
             }
         }
+        f.setTableName(tableName);
         int ptype = PQftype(d->result, i);
         f.setType(qDecodePSQLType(ptype));
         int len = PQfsize(d->result, i);