Compute the correct column name even if the column identifier is the

very last token in the SQL statement.  This fixes a problem introduced
by check-in [0fdf97efe5df745510c6b] and reported by the community during
beta-testing.

src/build.c

@@ -2124,7 +2124,7 @@ void sqlite3CreateView(
   ** the end.
   */
   sEnd = pParse->sLastToken;
-  assert( sEnd.z[0]!=0 );
+  assert( sEnd.z[0]!=0 || sEnd.n==0 );
   if( sEnd.z[0]!=';' ){
     sEnd.z += sEnd.n;
   }

src/parse.y

@@ -31,8 +31,11 @@
 //
 %syntax_error {
   UNUSED_PARAMETER(yymajor);  /* Silence some compiler warnings */
-  assert( TOKEN.z[0] );  /* The tokenizer always gives us a token */
-  sqlite3ErrorMsg(pParse, "near \"%T\": syntax error", &TOKEN);
+  if( TOKEN.z[0] ){
+    sqlite3ErrorMsg(pParse, "near \"%T\": syntax error", &TOKEN);
+  }else{
+    sqlite3ErrorMsg(pParse, "incomplete input");
+  }
 }
 %stack_overflow {
   sqlite3ErrorMsg(pParse, "parser stack overflow");

src/tokenize.c

@@ -526,7 +526,7 @@ int sqlite3RunParser(Parse *pParse, const char *zSql, char **pzErrMsg){
       }else{
         tokenType = TK_SEMI;
       }
-      zSql -= n;
+      n = 0;
     }
     if( tokenType>=TK_SPACE ){
       assert( tokenType==TK_SPACE || tokenType==TK_ILLEGAL );

test/capi2.test

@@ -163,7 +163,7 @@ do_test capi2-3.2 {
       sqlite3_prepare $DB {select bogus from } -1 TAIL
   } msg]
   lappend rc $msg $TAIL
-} {1 {(1) near " ": syntax error} {}}
+} {1 {(1) incomplete input} {}}
 do_test capi2-3.3 {
   set rc [catch {
       sqlite3_prepare $DB {;;;;select bogus from sqlite_master} -1 TAIL

test/capi3.test

@@ -649,6 +649,18 @@ do_test capi3-5.33 {
   sqlite3_finalize $STMT
 } SQLITE_OK
 
+# 2018-01-09:  If a column is the last token if a string, the column name
+# was not being set correctly, due to changes in check-in
+# https://sqlite.org/src/info/0fdf97efe5df7455
+#
+# This problem was detected by the community during beta-testing.
+#
+do_test capi3-5.34 {
+  set STMT [sqlite3_prepare $DB {SELECT :a, :b} -1 TAIL]
+  sqlite3_column_count $STMT
+} 2
+check_header $STMT capi-5.35 {:a :b} {{} {}}
+sqlite3_finalize $STMT
 
 set ::ENC [execsql {pragma encoding}]
 db close

test/icu.test

@@ -138,8 +138,8 @@ ifcapable icu {
   do_catchsql_test icu-5.4 { 
     SELECT 'abc' REGEXP 'a[abc]c.*'
   } {0 1}
-  do_catchsql_test icu-5.4 {SELECT 'abc' REGEXP }   {1 {near " ": syntax error}}
-  do_catchsql_test icu-5.5 {SELECT 'abc' REGEXP, 1} {1 {near ",": syntax error}}
+  do_catchsql_test icu-5.5 {SELECT 'abc' REGEXP }   {1 {incomplete input}}
+  do_catchsql_test icu-5.6 {SELECT 'abc' REGEXP, 1} {1 {near ",": syntax error}}
 
   do_malloc_test icu-6.10 -sqlbody {
     SELECT upper(char(0xfb04,0xdf,0xfb04,0xe8,0xfb04));

test/main.test

@@ -434,7 +434,7 @@ do_test main-3.2.28 {
 } {0 246}
 do_test main-3.2.29 {
   catchsql {select 123/}
-} {1 {near "/": syntax error}}
+} {1 {incomplete input}}
 do_test main-3.2.30 {
   catchsql {select 123--5}
 } {0 123}
@@ -467,7 +467,7 @@ do_test main-3.4 {
 do_test main-3.5 {
   set v [catch {execsql {create}} msg]
   lappend v $msg
-} {1 {near "create": syntax error}}
+} {1 {incomplete input}}
 do_test main-3.6 {
   catchsql {SELECT 'abc' + #9}
 } {1 {near "#9": syntax error}}

test/select1.test

@@ -688,7 +688,7 @@ do_test select1-7.2 {
 do_test select1-7.3 {
   set v [catch {execsql {SELECT f1 FROM test1 as 'hi', test2 as}} msg]
   lappend v $msg
-} {1 {near "as": syntax error}}
+} {1 {incomplete input}}
 do_test select1-7.4 {
   set v [catch {execsql {
      SELECT f1 FROM test1 ORDER BY;

test/shell3.test

@@ -66,7 +66,7 @@ do_test shell3-1.6 {
 } {0 {}}
 do_test shell3-1.7 {
   catchcmd "foo.db \"CREATE TABLE\""
-} {1 {Error: near "TABLE": syntax error}}
+} {1 {Error: incomplete input}}
 
 #----------------------------------------------------------------------------
 #   shell3-2.*: Basic tests for running SQL file from command line.
@@ -96,6 +96,6 @@ do_test shell3-2.6 {
 } {0 {}}
 do_test shell3-2.7 {
   catchcmd "foo.db" "CREATE TABLE"
-} {1 {Error: near line 1: near "TABLE": syntax error}}
+} {1 {Error: near line 1: incomplete input}}
 
 finish_test

test/with2.test

@@ -326,7 +326,7 @@ do_catchsql_test 6.5 {
 
 do_catchsql_test 6.6 { 
   WITH x AS (SELECT * FROM t1) DELETE FROM t2 WHERE
-} {/1 {near .* syntax error}/}
+} {1 {incomplete input}}
 
 do_catchsql_test 6.7 { 
   WITH x AS (SELECT * FROM t1) DELETE FROM t2 WHRE 1;