Fix SQL syntax for statements that have "...limit = ?"

Closes #287

dbdimp.c

@@ -604,9 +604,9 @@ static char *parse_params(
       /*
         it would be good to be able to handle any number of cases and orders
       */
-      if ((*statement_ptr == 'l' || *statement_ptr == 'L') &&
-          (!strncmp(statement_ptr+1, "imit ", 5) ||
-           !strncmp(statement_ptr+1, "IMIT ", 5)))
+      if (((*statement_ptr == ' ') || (*statement_ptr == '\n') || (*statement_ptr == '\t')) &&
+          (!strncmp(statement_ptr+1, "limit ", 5) ||
+           !strncmp(statement_ptr+1, "LIMIT ", 5)))
       {
         limit_flag = 1;
       }
@@ -780,6 +780,7 @@ static char *parse_params(
 
 	/* in case this is a nested LIMIT */
       case ')':
+      case '=':
         limit_flag = 0;
 	*ptr++ = *statement_ptr++;
         break;

t/35limit.t

@@ -19,23 +19,23 @@ eval {$dbh= DBI->connect($test_dsn, $test_user, $test_password,
 if ($@) {
     plan skip_all => "no database connection";
 }
-plan tests => 111;
+plan tests => 115;
 
 ok(defined $dbh, "Connected to database");
 
 ok($dbh->do("DROP TABLE IF EXISTS dbd_mysql_t35"), "making slate clean");
 
-ok($dbh->do("CREATE TABLE dbd_mysql_t35 (id INT(4), name VARCHAR(64))"), "creating table");
+ok($dbh->do("CREATE TABLE dbd_mysql_t35 (id INT(4), name VARCHAR(64), name_limit VARCHAR(64))"), "creating table");
 
-ok(($sth = $dbh->prepare("INSERT INTO dbd_mysql_t35 VALUES (?,?)")));
+ok(($sth = $dbh->prepare("INSERT INTO dbd_mysql_t35 VALUES (?,?,?)")));
 
 for my $i (0..99) {
   my @chars = grep !/[0O1Iil]/, 0..9, 'A'..'Z', 'a'..'z';
   my $random_chars = join '', map { $chars[rand @chars] } 0 .. 16;
 
   # save these values for later testing
   $testInsertVals->{$i} = $random_chars;
-  ok(($rows = $sth->execute($i, $random_chars)));
+  ok(($rows = $sth->execute($i, $random_chars, $random_chars)));
 }
 
 ok($sth = $dbh->prepare("SELECT * FROM dbd_mysql_t35 LIMIT ?, ?"),
@@ -51,6 +51,24 @@ ok(@$array_ref == 50);
 
 ok($sth->finish);
 
+ok($dbh->do("UPDATE dbd_mysql_t35 SET name_limit = ? WHERE id = ?", undef, "updated_string", 1));
+
+ok($dbh->do("UPDATE dbd_mysql_t35 SET name = ? WHERE name_limit > ?", undef, "updated_string", 999999));
+
+# newline before LIMIT
+ok($dbh->do(<<'SQL'
+UPDATE dbd_mysql_t35 SET name = ?
+LIMIT ?
+SQL
+, undef, "updated_string", 0));
+
+# tab before LIMIT
+ok($dbh->do(<<'SQL'
+	UPDATE dbd_mysql_t35 SET name = ?
+	LIMIT ?
+SQL
+, undef, "updated_string", 0));
+
 ok($dbh->do("DROP TABLE dbd_mysql_t35"));
 
 ok($dbh->disconnect);