sqlite_see_if_its_a_number attribute to enable sqlite_is_number check

dbdimp.c

@@ -240,6 +240,7 @@ sqlite_db_login6(SV *dbh, imp_dbh_t *imp_dbh, char *dbname, char *user, char *pa
     imp_dbh->handle_binary_nulls       = FALSE;
     imp_dbh->allow_multiple_statements = FALSE;
     imp_dbh->use_immediate_transaction = FALSE;
+    imp_dbh->see_if_its_a_number       = FALSE;
 
     sqlite3_busy_timeout(imp_dbh->db, SQL_TIMEOUT);
 
@@ -439,6 +440,10 @@ sqlite_db_STORE_attrib(SV *dbh, imp_dbh_t *imp_dbh, SV *keysv, SV *valuesv)
         imp_dbh->use_immediate_transaction = !(! SvTRUE(valuesv));
         return TRUE;
     }
+    if (strEQ(key, "sqlite_see_if_its_a_number")) {
+        imp_dbh->see_if_its_a_number = !(! SvTRUE(valuesv));
+        return TRUE;
+    }
     if (strEQ(key, "sqlite_unicode")) {
 #if PERL_UNICODE_DOES_NOT_WORK_WELL
         sqlite_trace(dbh, imp_dbh, 3, form("Unicode support is disabled for this version of perl."));
@@ -477,6 +482,9 @@ sqlite_db_FETCH_attrib(SV *dbh, imp_dbh_t *imp_dbh, SV *keysv)
    if (strEQ(key, "sqlite_use_immediate_transaction")) {
        return sv_2mortal(newSViv(imp_dbh->use_immediate_transaction ? 1 : 0));
    }
+   if (strEQ(key, "sqlite_see_if_its_a_number")) {
+       return sv_2mortal(newSViv(imp_dbh->see_if_its_a_number ? 1 : 0));
+   }
    if (strEQ(key, "sqlite_unicode")) {
 #if PERL_UNICODE_DOES_NOT_WORK_WELL
        sqlite_trace(dbh, imp_dbh, 3, "Unicode support is disabled for this version of perl.");
@@ -637,15 +645,17 @@ sqlite_st_execute(SV *sth, imp_sth_t *imp_sth)
         else {
             STRLEN len;
             const char *data;
-#if 0
+            int numtype = 0;
-            int numtype;
+
-#endif
             if (imp_dbh->unicode) {
                 sv_utf8_upgrade(value);
             }
             data = SvPV(value, len);
-#if 0
+
+            if (imp_dbh->see_if_its_a_number) {
                 numtype = sqlite_is_number(aTHX_ data);
+            }
+
             if (numtype == 1) {
 #if defined(USE_64_BIT_INT)
                 rc = sqlite3_bind_int64(imp_sth->stmt, i+1, atoi(data));
@@ -657,11 +667,8 @@ sqlite_st_execute(SV *sth, imp_sth_t *imp_sth)
                 rc = sqlite3_bind_double(imp_sth->stmt, i+1, atof(data));
             }
             else {
-#endif
                 rc = sqlite3_bind_text(imp_sth->stmt, i+1, data, len, SQLITE_TRANSIENT);
-#if 0
             }
-#endif
         }
 
         if (value) {
@@ -816,7 +823,6 @@ sqlite_st_fetch(SV *sth, imp_sth_t *imp_sth)
         }
         switch(col_type) {
             case SQLITE_INTEGER:
-#if 1
                 sqlite_trace(sth, imp_sth, 5, form("fetch column %d as integer", i));
 #if defined(USE_64_BIT_INT)
                 sv_setiv(AvARRAY(av)[i], sqlite3_column_int64(imp_sth->stmt, i));
@@ -824,14 +830,11 @@ sqlite_st_fetch(SV *sth, imp_sth_t *imp_sth)
                 sv_setnv(AvARRAY(av)[i], (double)sqlite3_column_int64(imp_sth->stmt, i));
 #endif
                 break;
-#endif
             case SQLITE_FLOAT:
-#if 1
                 /* fetching as float may lose precision info in the perl world */
                 sqlite_trace(sth, imp_sth, 5, form("fetch column %d as float", i));
                 sv_setnv(AvARRAY(av)[i], sqlite3_column_double(imp_sth->stmt, i));
                 break;
-#endif
             case SQLITE_TEXT:
                 sqlite_trace(sth, imp_sth, 5, form("fetch column %d as text", i));
                 val = (char*)sqlite3_column_text(imp_sth->stmt, i);

dbdimp.h

@@ -35,6 +35,7 @@ struct imp_dbh_st {
     SV *collation_needed_callback;
     bool allow_multiple_statements;
     bool use_immediate_transaction;
+    bool see_if_its_a_number;
 };
 
 /* Statement Handle */

lib/DBD/SQLite.pm

@@ -752,7 +752,7 @@ like this while executing:
 
   SELECT bar FROM foo GROUP BY bar HAVING count(*) > "5";
 
-There are two workarounds for this.
+There are three workarounds for this.
 
 =over 4
 
@@ -778,6 +778,32 @@ This is somewhat weird, but works anyway.
   });
   $sth->execute(5);
 
+=item Set C<sqlite_see_if_its_a_number> database handle attribute
+
+As of version 1.32_02, you can use C<sqlite_see_if_its_a_number>
+to let DBD::SQLite to see if the bind values are numbers or not.
+
+  $dbh->{sqlite_see_if_its_a_number} = 1;
+  my $sth = $dbh->prepare(q{
+    SELECT bar FROM foo GROUP BY bar HAVING count(*) > ?;
+  });
+  $sth->execute(5);
+
+You can set it to true when you connect to a database.
+
+  my $dbh = DBI->connect('dbi:SQLite:foo', undef, undef, {
+    AutoCommit => 1,
+    RaiseError => 1,
+    sqlite_see_if_its_a_number => 1,
+  });
+
+This is the most straightforward solution, but as noted above,
+existing data in your databases created by DBD::SQLite have not
+always been stored as numbers, so this *might* cause other obscure
+problems. Use this sparingly when you handle existing databases.
+If you handle databases created by other tools like native C<sqlite3>
+command line tool, this attribute would help you.
+
 =back
 
 =head2 Placeholders
@@ -1033,6 +1059,12 @@ If you set this to true, DBD::SQLite tries to issue a C<begin
 immediate transaction> (instead of C<begin transaction>) when
 necessary. See above for details.
 
+=item sqlite_see_if_its_a_number
+
+If you set this to true, DBD::SQLite tries to see if the bind values
+are number or not, and does not quote if they are numbers. See above
+for details.
+
 =back
 
 =head2 Statement Handle Attributes

t/rt_29058_group_by.t

@@ -6,7 +6,7 @@ BEGIN {
 }
 
 use t::lib::Test;
-use Test::More tests => 7;
+use Test::More tests => 8;
 use Test::NoWarnings;
 use DBI qw(:sql_types);
 
@@ -51,6 +51,16 @@ $sth->execute;
 $ar = $sth->fetchall_arrayref;
 is( scalar(@$ar), 2, 'Got 2 results' );
 
+# known workaround 3
+{
+	local $dbh->{sqlite_see_if_its_a_number} = 1;
+	my $sth = $dbh->selectall_arrayref(
+		'SELECT bar FROM foo GROUP BY bar HAVING count(*) > ?',
+		undef, 1
+	);
+	is( scalar(@$ar), 2, 'Got 2 results' );
+}
+
 # and this is what should be tested
 #TODO: {
 	local $TODO = 'This test is currently broken again. Wait for a better fix, or use known workarounds shown above';

t/rt_29629_sqlite_where_length.t

@@ -7,7 +7,7 @@ BEGIN {
 }
 
 use t::lib::Test;
-use Test::More tests => 17;
+use Test::More tests => 19;
 use Test::NoWarnings;
 use DBI qw(:sql_types);
 
@@ -74,8 +74,15 @@ is( $sth->fetchrow_arrayref->[0], 1, "result of: $statement : [2]" );
 
 # known workarounds 2: add "+0" to let sqlite convert the binded param into number
 
-$statement =~ s/\?/\?\+0/;
+(my $tweaked_statement = $statement) =~ s/\?/\?\+0/;
-$sth = $dbh->prepare($statement);
+$sth = $dbh->prepare($tweaked_statement);
-ok( $sth->execute(2), "execute: $statement : [2]" );
+ok( $sth->execute(2), "execute: $tweaked_statement : [2]" );
-is( $sth->fetchrow_arrayref->[0], 1, "result of: $statement : [2]" );
+is( $sth->fetchrow_arrayref->[0], 1, "result of: $tweaked_statement : [2]" );
 
+# workaround 3: use sqlite_see_if_its_a_number attribute
+{
+	local $dbh->{sqlite_see_if_its_a_number} = 1;
+	$sth = $dbh->prepare($statement);
+	ok( $sth->execute(2), "execute: $statement : [2]" );
+	is( $sth->fetchrow_arrayref->[0], 1, "result of: $statement : [2]" );
+}