From c2d14a9a334cdd6a043ceb0f7eaebe184310a0c5 Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Fri, 7 Jul 2017 12:58:30 +0000
Subject: [PATCH] More efficient and compact implementation of walkExpr().

FossilOrigin-Name: 115d4b83392d346634866dd959bef30fca50db2e526df17eaeb3d94da7fc895e
---
 manifest      | 12 ++++++------
 manifest.uuid |  2 +-
 src/walker.c  | 18 +++++++++---------
 3 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/manifest b/manifest
index a3b0cd4405..584fc1ea37 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C More\saggressive\suse\sof\sEP_Leaf\son\sexpression\snodes,\sto\shelp\sprune\ssearches.
-D 2017-07-07T12:43:57.009
+C More\sefficient\sand\scompact\simplementation\sof\swalkExpr().
+D 2017-07-07T12:58:30.256
 F Makefile.in 081e48dfe7f995d57ce1a88ddf4d2917b4349158648a6cd45b42beae30de3a12
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc 4ebb1d257cac7fb1bcb4ba59278416d410ff1c4bf59447a9c37a415f3516056a
@@ -528,7 +528,7 @@ F src/vtab.c 35b9bdc2b41de32a417141d12097bcc4e29a77ed7cdb8f836d1d2305d946b61b
 F src/vxworks.h d2988f4e5a61a4dfe82c6524dd3d6e4f2ce3cdb9
 F src/wal.c 40c543f0a2195d1b0dc88ef12142bea690009344
 F src/wal.h 06b2a0b599cc0f53ea97f497cf8c6b758c999f71
-F src/walker.c 8fa7438b9068a19b33d358d6b30be62e417e888214cb9d686e32176dc6942c38
+F src/walker.c 3541df29d44d39811778fc6b23a0723b9f4d5f230a9eeec1ebf4a9c4e096bd17
 F src/where.c e7cc80943459ade4ccaeb5c7c10f8a0db8b797e0b0f2509de7efc557b76bf7b6
 F src/whereInt.h 2a4b634d63ce488b46d4b0da8f2eaa8f9aeab202bc25ef76f007de5e3fba1f20
 F src/wherecode.c f17f5d51e372168db51af637e265aa5e80f99fcc81bfead96b66e71a7732bc62
@@ -1628,7 +1628,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 9bc65635b29a4991c7821ef0939975d007f9ac23716717699353ef3246e27791
-R a3cdeda4bac6b83a0a83684ff5b8d25b
+P c1a1d68c8219c8072e60af5c46a30849ae9a04fa1a6b2a8b22b82fec069d691d
+R e43d92c5087013b7630ab4f8f0d126f6
 U drh
-Z f3a2b3ed70fa21b681b3e9640670979a
+Z 3b5c72be1fc661aa89486a41707f9fc4
diff --git a/manifest.uuid b/manifest.uuid
index 8cb356a276..f73f9dee39 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-c1a1d68c8219c8072e60af5c46a30849ae9a04fa1a6b2a8b22b82fec069d691d
\ No newline at end of file
+115d4b83392d346634866dd959bef30fca50db2e526df17eaeb3d94da7fc895e
\ No newline at end of file
diff --git a/src/walker.c b/src/walker.c
index 0e3c14844e..c280b4abf3 100644
--- a/src/walker.c
+++ b/src/walker.c
@@ -41,15 +41,15 @@ static SQLITE_NOINLINE int walkExpr(Walker *pWalker, Expr *pExpr){
   testcase( ExprHasProperty(pExpr, EP_TokenOnly) );
   testcase( ExprHasProperty(pExpr, EP_Reduced) );
   rc = pWalker->xExprCallback(pWalker, pExpr);
-  if( rc || ExprHasProperty(pExpr,(EP_TokenOnly|EP_Leaf)) ){
-    return rc & WRC_Abort;
-  }
-  if( pExpr->pLeft && walkExpr(pWalker, pExpr->pLeft) ) return WRC_Abort;
-  if( pExpr->pRight && walkExpr(pWalker, pExpr->pRight) ) return WRC_Abort;
-  if( ExprHasProperty(pExpr, EP_xIsSelect) ){
-    if( sqlite3WalkSelect(pWalker, pExpr->x.pSelect) ) return WRC_Abort;
-  }else if( pExpr->x.pList ){
-    if( sqlite3WalkExprList(pWalker, pExpr->x.pList) ) return WRC_Abort;
+  if( rc ) return rc & WRC_Abort;
+  if( !ExprHasProperty(pExpr,(EP_TokenOnly|EP_Leaf)) ){
+    if( pExpr->pLeft && walkExpr(pWalker, pExpr->pLeft) ) return WRC_Abort;
+    if( pExpr->pRight && walkExpr(pWalker, pExpr->pRight) ) return WRC_Abort;
+    if( ExprHasProperty(pExpr, EP_xIsSelect) ){
+      if( sqlite3WalkSelect(pWalker, pExpr->x.pSelect) ) return WRC_Abort;
+    }else if( pExpr->x.pList ){
+      if( sqlite3WalkExprList(pWalker, pExpr->x.pList) ) return WRC_Abort;
+    }
   }
   return WRC_Continue;
 }
-- 
2.47.2