Send VARCHAR type code instead of STRING

Author: mtopolnik

core/src/main/java/io/questdb/client/cutlass/qwp/client/QwpUdpSender.java

@@ -1305,7 +1305,7 @@ private void stageNullArrayColumnValue(CharSequence name, byte type) {
     }
 
     private void stageStringColumnValue(CharSequence name, CharSequence value) {
-        QwpTableBuffer.ColumnBuffer col = acquireColumn(name, TYPE_STRING, true);
+        QwpTableBuffer.ColumnBuffer col = acquireColumn(name, TYPE_VARCHAR, true);
         beginColumnWrite(col, name);
         col.addString(value);
         completeColumnWrite();

core/src/main/java/io/questdb/client/cutlass/qwp/client/QwpWebSocketSender.java

@@ -1015,7 +1015,7 @@ public QwpWebSocketSender stringColumn(CharSequence columnName, CharSequence val
         checkNotClosed();
         checkTableSelected();
         try {
-            QwpTableBuffer.ColumnBuffer col = currentTableBuffer.getOrCreateColumn(columnName, QwpConstants.TYPE_STRING, true);
+            QwpTableBuffer.ColumnBuffer col = currentTableBuffer.getOrCreateColumn(columnName, QwpConstants.TYPE_VARCHAR, true);
             if (col != null) {
                 col.addString(value);
             }

core/src/test/java/io/questdb/client/test/cutlass/qwp/client/QwpUdpSenderTest.java

@@ -1101,7 +1101,7 @@ public void testNullableStringPrefixFlushKeepsNullStateWithoutReflection() throw
                 Assert.assertNotNull(tableBuffer);
                 Assert.assertEquals(0, tableBuffer.getRowCount());
 
-                QwpTableBuffer.ColumnBuffer stringColumn = tableBuffer.getExistingColumn("s", TYPE_STRING);
+                QwpTableBuffer.ColumnBuffer stringColumn = tableBuffer.getExistingColumn("s", TYPE_VARCHAR);
                 assertNullableStringNullState(stringColumn);
 
                 QwpTableBuffer.ColumnBuffer longColumn = tableBuffer.getExistingColumn("x", TYPE_LONG);