From: Matt S Trout Date: Mon, 17 Sep 2018 01:50:28 +0000 (+0000) Subject: burn unneccessary _where_ methods X-Git-Tag: v2.000000~3^2~461 X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=220d0694aafa6074d5205cc0cc29e63faf9eec2d;p=dbsrgits%2FSQL-Abstract.git burn unneccessary _where_ methods --- diff --git a/lib/SQL/Abstract.pm b/lib/SQL/Abstract.pm index 4b72804..ede6ade 100644 --- a/lib/SQL/Abstract.pm +++ b/lib/SQL/Abstract.pm @@ -1081,422 +1081,6 @@ sub _where_op_LITERAL { return @$literal; } -sub _where_hashpair_ARRAYREF { - my ($self, $k, $v) = @_; - - if (@$v) { - my @v = @$v; # need copy because of shift below - $self->_debug("ARRAY($k) means distribute over elements"); - - # put apart first element if it is an operator (-and, -or) - my $op = ( - (defined $v[0] && $v[0] =~ /^ - (?: AND|OR ) $/ix) - ? shift @v - : '' - ); - my @distributed = map { {$k => $_} } @v; - - if ($op) { - $self->_debug("OP($op) reinjected into the distributed array"); - unshift @distributed, $op; - } - - my $logic = $op ? substr($op, 1) : ''; - - return $self->_recurse_where(\@distributed, $logic); - } - else { - $self->_debug("empty ARRAY($k) means 0=1"); - return ($self->{sqlfalse}); - } -} - -sub _where_hashpair_HASHREF { - my ($self, $k, $v, $logic) = @_; - $logic ||= 'and'; - - local $self->{_nested_func_lhs} = defined $self->{_nested_func_lhs} - ? $self->{_nested_func_lhs} - : $k - ; - - my ($all_sql, @all_bind); - - for my $orig_op (sort keys %$v) { - my $val = $v->{$orig_op}; - - # put the operator in canonical form - my $op = $orig_op; - - # FIXME - we need to phase out dash-less ops - $op =~ s/^-//; # remove possible initial dash - $op =~ s/^\s+|\s+$//g;# remove leading/trailing space - $op =~ s/\s+/ /g; # compress whitespace - - $self->_assert_pass_injection_guard($op); - - # fixup is_not - $op =~ s/^is_not/IS NOT/i; - - # so that -not_foo works correctly - $op =~ s/^not_/NOT /i; - - # another retarded special case: foo => { $op => { -value => undef } } - if (ref $val eq 'HASH' and keys %$val == 1 and exists $val->{-value} and ! defined $val->{-value} ) { - $val = undef; - } - - my ($sql, @bind); - - # CASE: col-value logic modifiers - if ($orig_op =~ /^ \- (and|or) $/xi) { - ($sql, @bind) = $self->_where_hashpair_HASHREF($k, $val, $1); - } - # CASE: special operators like -in or -between - elsif (my $special_op = List::Util::first { $op =~ $_->{regex} } @{$self->{special_ops}}) { - my $handler = $special_op->{handler}; - if (! $handler) { - puke "No handler supplied for special operator $orig_op"; - } - elsif (not ref $handler) { - ($sql, @bind) = $self->$handler($k, $op, $val); - } - elsif (ref $handler eq 'CODE') { - ($sql, @bind) = $handler->($self, $k, $op, $val); - } - else { - puke "Illegal handler for special operator $orig_op - expecting a method name or a coderef"; - } - } - else { - $self->_SWITCH_refkind($val, { - - ARRAYREF => sub { # CASE: col => {op => \@vals} - ($sql, @bind) = $self->_where_field_op_ARRAYREF($k, $op, $val); - }, - - ARRAYREFREF => sub { # CASE: col => {op => \[$sql, @bind]} (literal SQL with bind) - my ($sub_sql, @sub_bind) = @$$val; - $self->_assert_bindval_matches_bindtype(@sub_bind); - $sql = join ' ', $self->_convert($self->_quote($k)), - $self->_sqlcase($op), - $sub_sql; - @bind = @sub_bind; - }, - - UNDEF => sub { # CASE: col => {op => undef} : sql "IS (NOT)? NULL" - my $is = - $op =~ /^not$/i ? 'is not' # legacy - : $op =~ $self->{equality_op} ? 'is' - : $op =~ $self->{like_op} ? belch("Supplying an undefined argument to '@{[ uc $op]}' is deprecated") && 'is' - : $op =~ $self->{inequality_op} ? 'is not' - : $op =~ $self->{not_like_op} ? belch("Supplying an undefined argument to '@{[ uc $op]}' is deprecated") && 'is not' - : puke "unexpected operator '$orig_op' with undef operand"; - - $sql = $self->_quote($k) . $self->_sqlcase(" $is null"); - }, - - FALLBACK => sub { # CASE: col => {op/func => $stuff} - ($sql, @bind) = $self->_where_unary_op($op, $val); - - $sql = join(' ', - $self->_convert($self->_quote($k)), - $self->{_nested_func_lhs} eq $k ? $sql : "($sql)", # top level vs nested - ); - }, - }); - } - - ($all_sql) = (defined $all_sql and $all_sql) ? $self->_join_sql_clauses($logic, [$all_sql, $sql], []) : $sql; - push @all_bind, @bind; - } - return ($all_sql, @all_bind); -} - -sub _where_field_IS { - my ($self, $k, $op, $v) = @_; - - my ($s) = $self->_SWITCH_refkind($v, { - UNDEF => sub { - join ' ', - $self->_convert($self->_quote($k)), - map { $self->_sqlcase($_)} ($op, 'null') - }, - FALLBACK => sub { - puke "$op can only take undef as argument"; - }, - }); - - $s; -} - -sub _where_field_op_ARRAYREF { - my ($self, $k, $op, $vals) = @_; - - my @vals = @$vals; #always work on a copy - - if (@vals) { - $self->_debug(sprintf '%s means multiple elements: [ %s ]', - $vals, - join(', ', map { defined $_ ? "'$_'" : 'NULL' } @vals ), - ); - - # see if the first element is an -and/-or op - my $logic; - if (defined $vals[0] && $vals[0] =~ /^ - (AND|OR) $/ix) { - $logic = uc $1; - shift @vals; - } - - # a long standing API wart - an attempt to change this behavior during - # the 1.50 series failed *spectacularly*. Warn instead and leave the - # behavior as is - if ( - @vals > 1 - and - (!$logic or $logic eq 'OR') - and - ($op =~ $self->{inequality_op} or $op =~ $self->{not_like_op}) - ) { - my $o = uc($op); - belch "A multi-element arrayref as an argument to the inequality op '$o' " - . 'is technically equivalent to an always-true 1=1 (you probably wanted ' - . "to say ...{ \$inequality_op => [ -and => \@values ] }... instead)" - ; - } - - # distribute $op over each remaining member of @vals, append logic if exists - return $self->_recurse_where([map { {$k => {$op, $_}} } @vals], $logic); - - } - else { - # try to DWIM on equality operators - return - $op =~ $self->{equality_op} ? $self->{sqlfalse} - : $op =~ $self->{like_op} ? belch("Supplying an empty arrayref to '@{[ uc $op]}' is deprecated") && $self->{sqlfalse} - : $op =~ $self->{inequality_op} ? $self->{sqltrue} - : $op =~ $self->{not_like_op} ? belch("Supplying an empty arrayref to '@{[ uc $op]}' is deprecated") && $self->{sqltrue} - : puke "operator '$op' applied on an empty array (field '$k')"; - } -} - - -sub _where_hashpair_SCALARREF { - my ($self, $k, $v) = @_; - $self->_debug("SCALAR($k) means literal SQL: $$v"); - my $sql = $self->_quote($k) . " " . $$v; - return ($sql); -} - -# literal SQL with bind -sub _where_hashpair_ARRAYREFREF { - my ($self, $k, $v) = @_; - $self->_debug("REF($k) means literal SQL: @${$v}"); - my ($sql, @bind) = @$$v; - $self->_assert_bindval_matches_bindtype(@bind); - $sql = $self->_quote($k) . " " . $sql; - return ($sql, @bind ); -} - -# literal SQL without bind -sub _where_hashpair_SCALAR { - my ($self, $k, $v) = @_; - $self->_debug("NOREF($k) means simple key=val: $k $self->{cmp} $v"); - return ($self->_where_hashpair_HASHREF($k, { $self->{cmp} => $v })); -} - - -sub _where_hashpair_UNDEF { - my ($self, $k, $v) = @_; - $self->_debug("UNDEF($k) means IS NULL"); - return $self->_where_hashpair_HASHREF($k, { -is => undef }); -} - -#====================================================================== -# WHERE: TOP-LEVEL OTHERS (SCALARREF, SCALAR, UNDEF) -#====================================================================== - - -sub _where_SCALARREF { - my ($self, $where) = @_; - - # literal sql - $self->_debug("SCALAR(*top) means literal SQL: $$where"); - return ($$where); -} - - -sub _where_SCALAR { - my ($self, $where) = @_; - - # literal sql - $self->_debug("NOREF(*top) means literal SQL: $where"); - return ($where); -} - - -sub _where_UNDEF { - my ($self) = @_; - return (); -} - - -#====================================================================== -# WHERE: BUILTIN SPECIAL OPERATORS (-in, -between) -#====================================================================== - - -sub _where_field_BETWEEN { - my ($self, $k, $op, $vals) = @_; - - my ($label, $and, $placeholder); - $label = $self->_convert($self->_quote($k)); - $and = ' ' . $self->_sqlcase('and') . ' '; - $placeholder = $self->_convert('?'); - $op = $self->_sqlcase($op); - - my $invalid_args = "Operator '$op' requires either an arrayref with two defined values or expressions, or a single literal scalarref/arrayref-ref"; - - my ($clause, @bind) = $self->_SWITCH_refkind($vals, { - ARRAYREFREF => sub { - my ($s, @b) = @$$vals; - $self->_assert_bindval_matches_bindtype(@b); - ($s, @b); - }, - SCALARREF => sub { - return $$vals; - }, - ARRAYREF => sub { - puke $invalid_args if @$vals != 2; - - my (@all_sql, @all_bind); - foreach my $val (@$vals) { - my ($sql, @bind) = $self->_SWITCH_refkind($val, { - SCALAR => sub { - return ($placeholder, $self->_bindtype($k, $val) ); - }, - SCALARREF => sub { - return $$val; - }, - ARRAYREFREF => sub { - my ($sql, @bind) = @$$val; - $self->_assert_bindval_matches_bindtype(@bind); - return ($sql, @bind); - }, - HASHREF => sub { - my ($func, $arg, @rest) = %$val; - puke "Only simple { -func => arg } functions accepted as sub-arguments to BETWEEN" - if (@rest or $func !~ /^ \- (.+)/x); - $self->_where_unary_op($1 => $arg); - }, - FALLBACK => sub { - puke $invalid_args, - }, - }); - push @all_sql, $sql; - push @all_bind, @bind; - } - - return ( - (join $and, @all_sql), - @all_bind - ); - }, - FALLBACK => sub { - puke $invalid_args, - }, - }); - - my $sql = "( $label $op $clause )"; - return ($sql, @bind) -} - - -sub _where_field_IN { - my ($self, $k, $op, $vals) = @_; - - # backwards compatibility: if scalar, force into an arrayref - $vals = [$vals] if defined $vals && ! ref $vals; - - my ($label) = $self->_convert($self->_quote($k)); - my ($placeholder) = $self->_convert('?'); - $op = $self->_sqlcase($op); - - my ($sql, @bind) = $self->_SWITCH_refkind($vals, { - ARRAYREF => sub { # list of choices - if (@$vals) { # nonempty list - my (@all_sql, @all_bind); - - for my $val (@$vals) { - my ($sql, @bind) = $self->_SWITCH_refkind($val, { - SCALAR => sub { - return ($placeholder, $val); - }, - SCALARREF => sub { - return $$val; - }, - ARRAYREFREF => sub { - my ($sql, @bind) = @$$val; - $self->_assert_bindval_matches_bindtype(@bind); - return ($sql, @bind); - }, - HASHREF => sub { - my ($func, $arg, @rest) = %$val; - puke "Only simple { -func => arg } functions accepted as sub-arguments to IN" - if (@rest or $func !~ /^ \- (.+)/x); - $self->_where_unary_op($1 => $arg); - }, - UNDEF => sub { - puke( - 'SQL::Abstract before v1.75 used to generate incorrect SQL when the ' - . "-$op operator was given an undef-containing list: !!!AUDIT YOUR CODE " - . 'AND DATA!!! (the upcoming Data::Query-based version of SQL::Abstract ' - . 'will emit the logically correct SQL instead of raising this exception)' - ); - }, - }); - push @all_sql, $sql; - push @all_bind, @bind; - } - - return ( - sprintf('%s %s ( %s )', - $label, - $op, - join(', ', @all_sql) - ), - $self->_bindtype($k, @all_bind), - ); - } - else { # empty list: some databases won't understand "IN ()", so DWIM - my $sql = ($op =~ /\bnot\b/i) ? $self->{sqltrue} : $self->{sqlfalse}; - return ($sql); - } - }, - - SCALARREF => sub { # literal SQL - my $sql = $self->_open_outer_paren($$vals); - return ("$label $op ( $sql )"); - }, - ARRAYREFREF => sub { # literal SQL with bind - my ($sql, @bind) = @$$vals; - $self->_assert_bindval_matches_bindtype(@bind); - $sql = $self->_open_outer_paren($sql); - return ("$label $op ( $sql )", @bind); - }, - - UNDEF => sub { - puke "Argument passed to the '$op' operator can not be undefined"; - }, - - FALLBACK => sub { - puke "special op $op requires an arrayref (or scalarref/arrayref-ref)"; - }, - }); - - return ($sql, @bind); -} - # Some databases (SQLite) treat col IN (1, 2) different from # col IN ( (1, 2) ). Use this to strip all outer parens while # adding them back in the corresponding method