Use ansi escape codes to use different colored text for opcode names in the output of [explain_i]: Red for opcodes that insert or delete b-tree elements, blue for opcodes that move cursors and green for the ResultRow opcode.

FossilOrigin-Name: 4be2b64b3e5237ee1fb156c06cffaf7d96f6c532

manifest

@@ -1,5 +1,5 @@
-C Allocate\sextra\sstack\sspace\sfor\sUnpackedRecord\sobjects,\sreducing\sthe\sneed\nto\smalloc\sfor\sthem\sas\soften,\sand\sthereby\sget\sa\sperformance\simprovement.
-D 2013-11-06T14:36:08.208
+C Use\sansi\sescape\scodes\sto\suse\sdifferent\scolored\stext\sfor\sopcode\snames\sin\sthe\soutput\sof\s[explain_i]:\sRed\sfor\sopcodes\sthat\sinsert\sor\sdelete\sb-tree\selements,\sblue\sfor\sopcodes\sthat\smove\scursors\sand\sgreen\sfor\sthe\sResultRow\sopcode.
+D 2013-11-06T14:52:40.725
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 0522b53cdc1fcfc18f3a98e0246add129136c654
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -832,7 +832,7 @@ F test/tclsqlite.test 37a61c2da7e3bfe3b8c1a2867199f6b860df5d43
 F test/tempdb.test 19d0f66e2e3eeffd68661a11c83ba5e6ace9128c
 F test/temptable.test d2c9b87a54147161bcd1822e30c1d1cd891e5b30
 F test/temptrigger.test 0a48d94222d50e6e50d72ac103606c4f8e7cbb81
-F test/tester.tcl b95c4e385003665c729bed9dbd385c42c80daeef
+F test/tester.tcl 7eac97d18c7836d91c078e1d5fa3f7eb5d9d6b4e
 F test/thread001.test 9f22fd3525a307ff42a326b6bc7b0465be1745a5
 F test/thread002.test e630504f8a06c00bf8bbe68528774dd96aeb2e58
 F test/thread003.test ee4c9efc3b86a6a2767516a37bd64251272560a7
@@ -1134,7 +1134,7 @@ F tool/vdbe-compress.tcl f12c884766bd14277f4fcedcae07078011717381
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
 F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
-P d70c78814ba565a44628eab61a3a0a5dba56269a
-R ea2c9590eda6a4e346a10f3d83db98c2
-U drh
-Z d18e98af7e1e2419526abd3178c35981
+P a725a75f870d7d9b21946fbcc71a956492986ab0
+R f17a9fec5c58d036c7444fd4ecaebcc0
+U dan
+Z ec46c95f9849c05682c500682b3a9f1b

manifest.uuid

@@ -1 +1 @@
-a725a75f870d7d9b21946fbcc71a956492986ab0
+4be2b64b3e5237ee1fb156c06cffaf7d96f6c532

test/tester.tcl

@@ -1029,6 +1029,29 @@ proc explain_i {sql {db db}} {
   puts "----  ------------  ------  ------  ------  ----------------  --  -"
 
 
+  # Set up colors for the different opcodes. Scheme is as follows:
+  #
+  #   Red:   Opcodes that write to a b-tree.
+  #   Blue:  Opcodes that reposition or seek a cursor. 
+  #   Green: The ResultRow opcode.
+  #
+  set R "\033\[31;1m"        ;# Red fg
+  set G "\033\[32;1m"        ;# Green fg
+  set B "\033\[34;1m"        ;# Red fg
+  set D "\033\[39;0m"        ;# Default fg
+  foreach opcode {
+      Seek SeekGe SeekGt SeekLe SeekLt NotFound Last Rewind
+      NoConflict Next Prev
+  } {
+    set color($opcode) $B
+  }
+  foreach opcode {ResultRow} {
+    set color($opcode) $G
+  }
+  foreach opcode {IdxInsert Insert Delete IdxDelete} {
+    set color($opcode) $R
+  }
+
   set bSeenGoto 0
   $db eval "explain $sql" {} {
     set x($addr) 0
@@ -1039,7 +1062,7 @@ proc explain_i {sql {db db}} {
       set bSeenGoto 1
     }
 
-    if {$opcode == "Next"} {
+    if {$opcode == "Next" || $opcode=="Prev"} {
       for {set i $p2} {$i<$addr} {incr i} {
         incr x($i) 2
       }
@@ -1061,8 +1084,12 @@ proc explain_i {sql {db db}} {
       puts ""
     }
     set I [string repeat " " $x($addr)]
-    puts [format {%-4d  %s%-12.12s  %-6d  %-6d  %-6d  % -17s %s  %s} \
-      $addr $I $opcode $p1 $p2 $p3 $p4 $p5 $comment
+
+    set col ""
+    catch { set col $color($opcode) }
+
+    puts [format {%-4d  %s%s%-12.12s%s  %-6d  %-6d  %-6d  % -17s %s  %s} \
+      $addr $I $col $opcode $D $p1 $p2 $p3 $p4 $p5 $comment
     ]
   }
   puts "----  ------------  ------  ------  ------  ----------------  --  -"