Fix for key depth computation, uncovered by types3 testing, running AncestorLookup_NestedIT.testABCIndexToR
Fix for key depth computation, uncovered by types3 testing, running AncestorLookup_NestedIT.testABCIndexToR
shunwang/sql-layer-1,relateiq/sql-layer,ngaut/sql-layer,wfxiang08/sql-layer-1,relateiq/sql-layer,jaytaylor/sql-layer,ngaut/sql-layer,relateiq/sql-layer,shunwang/sql-layer-1,shunwang/sql-layer-1,jaytaylor/sql-layer,qiuyesuifeng/sql-layer,jaytaylor/sql-layer,qiuyesuifeng/sql-layer,ngaut/sql-layer,jaytaylor/sql-layer,ngaut/sql-layer,wfxiang08/sql-layer-1,shunwang/sql-layer-1,wfxiang08/sql-layer-1,qiuyesuifeng/sql-layer,relateiq/sql-layer,wfxiang08/sql-layer-1,qiuyesuifeng/sql-layer