commit 93c7d4ef3ecf2945359ff740e920a14853c4bc17
author Zoltan Ujhelyi <ujhelyiz@incquerylabs.com> Fri Oct 20 15:03:34 2017 +0200
committer Zoltan Ujhelyi <ujhelyiz@incquerylabs.com> Tue Oct 31 05:41:57 2017 -0400
tree 1cccc531ad0f379d7208c31b4b8281a16b2eaeae
parent 8dfe52d1c4f58b1d4b39566b4fed8f3051ae9aea

[526225] Fix a regression related to statistics indexing

The fix for bug 518356
(http://git.eclipse.org/c/viatra/org.eclipse.viatra.git/commit/?id=aee1e492e61a238edd804dba7becd53af5a6f664
) erased the statistics indexes before executing a full indexing.
However, when moving model elements outside of the model scope, this
might have resulted in clearing the statistics when it is not
recalculated.

This change (backported from master) fixes the issue by only clearing
the stats store if the old indexing level had statistics indexing but
did not have instance indexing.

Conflicts:
	query/plugins/org.eclipse.viatra.query.runtime.base/src/org/eclipse/viatra/query/runtime/base/core/NavigationHelperImpl.java

Change-Id: I2d7fe18ccbc4c0f43199a42f753b50edf96ff114
Signed-off-by: Zoltan Ujhelyi <ujhelyiz@incquerylabs.com>