X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FSQL%2FAbstract.pm;h=d4c8c04788a26c6453f7566c9948b03cc13084ec;hb=c1c0b98908a0c9d73f97ccb0c8669c24be4fe604;hp=bd04ae1be4af12c1990363539edc54c1ba45d552;hpb=fee28f13a45aa4c3e558481cc80dafe567ab5743;p=dbsrgits%2FSQL-Abstract.git diff --git a/lib/SQL/Abstract.pm b/lib/SQL/Abstract.pm index bd04ae1..d4c8c04 100644 --- a/lib/SQL/Abstract.pm +++ b/lib/SQL/Abstract.pm @@ -39,26 +39,9 @@ our $AUTOLOAD; my @BUILTIN_SPECIAL_OPS = ( {regex => qr/^ (?: not \s )? between $/ix, handler => sub { die "NOPE" }}, {regex => qr/^ (?: not \s )? in $/ix, handler => sub { die "NOPE" }}, - {regex => qr/^ ident $/ix, handler => sub { die "NOPE" }}, - {regex => qr/^ value $/ix, handler => sub { die "NOPE" }}, {regex => qr/^ is (?: \s+ not )? $/ix, handler => sub { die "NOPE" }}, ); -# unaryish operators - key maps to handler -my @BUILTIN_UNARY_OPS = ( - # the digits are backcompat stuff - { regex => qr/^ and (?: [_\s]? \d+ )? $/xi, handler => '_where_op_ANDOR' }, - { regex => qr/^ or (?: [_\s]? \d+ )? $/xi, handler => '_where_op_ANDOR' }, - { regex => qr/^ nest (?: [_\s]? \d+ )? $/xi, handler => '_where_op_NEST' }, - { regex => qr/^ (?: not \s )? bool $/xi, handler => '_where_op_BOOL' }, - { regex => qr/^ ident $/xi, handler => '_where_op_IDENT' }, - { regex => qr/^ value $/xi, handler => '_where_op_VALUE' }, - { regex => qr/^ op $/xi, handler => '_where_op_OP' }, - { regex => qr/^ bind $/xi, handler => '_where_op_BIND' }, - { regex => qr/^ literal $/xi, handler => '_where_op_LITERAL' }, - { regex => qr/^ func $/xi, handler => '_where_op_FUNC' }, -); - #====================================================================== # DEBUGGING AND ERROR REPORTING #====================================================================== @@ -178,7 +161,6 @@ sub new { # unary operators $opt{unary_ops} ||= []; - push @{$opt{unary_ops}}, @BUILTIN_UNARY_OPS; # rudimentary sanity-check for user supplied bits treated as functions/operators # If a purported function matches this regular expression, an exception is thrown. @@ -197,6 +179,8 @@ sub new { return bless \%opt, $class; } +sub sqltrue { +{ -literal => [ $_[0]->{sqltrue} ] } } +sub sqlfalse { +{ -literal => [ $_[0]->{sqlfalse} ] } } sub _assert_pass_injection_guard { if ($_[1] =~ $_[0]->{injection_guard}) { @@ -431,8 +415,10 @@ sub _update_set_values { puke 'Operator calls in update must be in the form { -op => $arg }' if (@rest or not $op =~ /^\-(.+)/); - local $self->{_nested_func_lhs} = $k; - my ($sql, @bind) = $self->_where_unary_op($1, $arg); + local our $Cur_Col_Meta = $k; + my ($sql, @bind) = $self->_render_expr( + $self->_expand_expr_hashpair($op, $arg) + ); push @set, "$label = $sql"; push @all_bind, @bind; @@ -526,7 +512,9 @@ sub where { my ($self, $where, $order) = @_; # where ? - my ($sql, @bind) = $self->_recurse_where($where); + my ($sql, @bind) = defined($where) + ? $self->_recurse_where($where) + : (undef); $sql = (defined $sql and length $sql) ? $self->_sqlcase(' where ') . "( $sql )" : ''; # order by? @@ -540,7 +528,8 @@ sub where { } sub _expand_expr { - my ($self, $expr, $logic) = @_; + my ($self, $expr, $logic, $default_scalar_to) = @_; + local our $Default_Scalar_To = $default_scalar_to if $default_scalar_to; return undef unless defined($expr); if (ref($expr) eq 'HASH') { if (keys %$expr > 1) { @@ -570,8 +559,8 @@ sub _expand_expr { push(@res, $self->_expand_expr({ $el, shift(@expr) })); } elsif ($elref eq 'ARRAY') { push(@res, $self->_expand_expr($el)) if @$el; - } elsif (is_literal_value($el)) { - push @res, $el; + } elsif (my $l = is_literal_value($el)) { + push @res, { -literal => $l }; } elsif ($elref eq 'HASH') { push @res, $self->_expand_expr($el); } else { @@ -584,6 +573,9 @@ sub _expand_expr { return +{ -literal => $literal }; } if (!ref($expr) or Scalar::Util::blessed($expr)) { + if (my $d = $Default_Scalar_To) { + return +{ $d => $expr }; + } if (my $m = our $Cur_Col_Meta) { return +{ -bind => [ $m, $expr ] }; } @@ -640,9 +632,7 @@ sub _expand_expr_hashpair { # top level special ops are illegal in general puke "Illegal use of top-level '-$op'" - if !(defined $self->{_nested_func_lhs}) - and List::Util::first { $op =~ $_->{regex} } @{$self->{special_ops}} - and not List::Util::first { $op =~ $_->{regex} } @{$self->{unary_ops}}; + if List::Util::first { $op =~ $_->{regex} } @{$self->{special_ops}}; } if ($k eq '-value' and my $m = our $Cur_Col_Meta) { return +{ -bind => [ $m, $v ] }; @@ -683,7 +673,8 @@ sub _expand_expr_hashpair { } if (ref($v) eq 'HASH') { if (keys %$v > 1) { - return { -and => [ + return { -op => [ + 'and', map $self->_expand_expr_hashpair($k => { $_ => $v->{$_} }), sort keys %$v ] }; @@ -734,9 +725,7 @@ sub _expand_expr_hashpair { map { ref($_) ? $_ : { -bind => [ $k, $_ ] } } map { defined($_) ? $_: puke($undef_err) } (ref($vv) eq 'ARRAY' ? @$vv : $vv); - return +{ - -literal => [ $self->{$vk =~ /^not/ ? 'sqltrue' : 'sqlfalse'} ] - } unless @rhs; + return $self->${\($vk =~ /^not/ ? 'sqltrue' : 'sqlfalse')} unless @rhs; return +{ -op => [ join(' ', split '_', $vk), @@ -807,10 +796,10 @@ sub _expand_expr_hashpair { # try to DWIM on equality operators my $op = join ' ', split '_', $vk; 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} + $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 '$k')"; } return +{ -op => [ @@ -845,14 +834,17 @@ sub _expand_expr_hashpair { ] }; } if (ref($v) eq 'ARRAY') { - return $self->{sqlfalse} unless @$v; + return $self->sqlfalse unless @$v; $self->_debug("ARRAY($k) means distribute over elements"); my $this_logic = ( $v->[0] =~ /^-((?:and|or))$/i ? ($v = [ @{$v}[1..$#$v] ], $1) : ($self->{logic} || 'or') ); - return +{ "-${this_logic}" => [ map $self->_expand_expr({ $k => $_ }, $this_logic), @$v ] }; + return +{ -op => [ + $this_logic, + map $self->_expand_expr({ $k => $_ }, $this_logic), @$v + ] }; } if (my $literal = is_literal_value($v)) { unless (length $k) { @@ -872,6 +864,18 @@ sub _expand_expr_hashpair { die "notreached"; } +sub _render_expr { + my ($self, $expr) = @_; + my ($k, $v, @rest) = %$expr; + die "No" if @rest; + my %op = map +("-$_" => '_render_'.$_), + qw(op func value bind ident literal); + if (my $meth = $op{$k}) { + return $self->$meth($v); + } + die "notreached: $k"; +} + sub _recurse_where { my ($self, $where, $logic) = @_; @@ -882,9 +886,11 @@ sub _recurse_where { #print STDERR Data::Dumper::Concise::Dumper([ EXP => $where_exp ]); # dispatch on appropriate method according to refkind of $where - my $method = $self->_METHOD_FOR_refkind("_where", $where_exp); +# my $method = $self->_METHOD_FOR_refkind("_where", $where_exp); - my ($sql, @bind) = $self->$method($where_exp, $logic); +# my ($sql, @bind) = $self->$method($where_exp, $logic); + + my ($sql, @bind) = defined($where_exp) ? $self->_render_expr($where_exp) : (undef); # DBIx::Class used to call _recurse_where in scalar context # something else might too... @@ -897,324 +903,22 @@ sub _recurse_where { } } +sub _render_ident { + my ($self, $ident) = @_; - -#====================================================================== -# WHERE: top-level ARRAYREF -#====================================================================== - - -sub _where_ARRAYREF { - my ($self, $where, $logic) = @_; - - $logic = uc($logic || $self->{logic}); - $logic eq 'AND' or $logic eq 'OR' or puke "unknown logic: $logic"; - - my @clauses = @$where; - - my (@sql_clauses, @all_bind); - # need to use while() so can shift() for pairs - while (@clauses) { - my $el = shift @clauses; - - $el = undef if (defined $el and ! length $el); - - # switch according to kind of $el and get corresponding ($sql, @bind) - my ($sql, @bind) = $self->_SWITCH_refkind($el, { - - # skip empty elements, otherwise get invalid trailing AND stuff - ARRAYREF => sub {$self->_recurse_where($el) if @$el}, - - ARRAYREFREF => sub { - my ($s, @b) = @$$el; - $self->_assert_bindval_matches_bindtype(@b); - ($s, @b); - }, - - HASHREF => sub {$self->_recurse_where($el, 'and') if %$el}, - - SCALARREF => sub { ($$el); }, - - SCALAR => sub { - # top-level arrayref with scalars, recurse in pairs - $self->_recurse_where({$el => shift(@clauses)}) - }, - - UNDEF => sub {puke "Supplying an empty left hand side argument is not supported in array-pairs" }, - }); - - if ($sql) { - push @sql_clauses, $sql; - push @all_bind, @bind; - } - } - - return $self->_join_sql_clauses($logic, \@sql_clauses, \@all_bind); + return $self->_convert($self->_quote($ident)); } -#====================================================================== -# WHERE: top-level ARRAYREFREF -#====================================================================== +sub _render_value { + my ($self, $value) = @_; -sub _where_ARRAYREFREF { - my ($self, $where) = @_; - my ($sql, @bind) = @$$where; - $self->_assert_bindval_matches_bindtype(@bind); - return ($sql, @bind); + return ($self->_convert('?'), $self->_bindtype(undef, $value)); } -#====================================================================== -# WHERE: top-level HASHREF -#====================================================================== - -sub _where_HASHREF { - my ($self, $where) = @_; - my (@sql_clauses, @all_bind); - - for my $k (sort keys %$where) { - my $v = $where->{$k}; - - # ($k => $v) is either a special unary op or a regular hashpair - my ($sql, @bind) = do { - if ($k =~ /^-./) { - # put the operator in canonical form - my $op = $k; - $op = substr $op, 1; # remove initial dash - $op =~ s/^\s+|\s+$//g;# remove leading/trailing space - $op =~ s/\s+/ /g; # compress whitespace - - # so that -not_foo works correctly - $op =~ s/^not_/NOT /i; - - $self->_debug("Unary OP(-$op) within hashref, recursing..."); - my ($s, @b) = $self->_where_unary_op($op, $v); - - # top level vs nested - # we assume that handled unary ops will take care of their ()s - $s = "($s)" unless ( - List::Util::first {$op =~ $_->{regex}} @{$self->{unary_ops}} - or - ( defined $self->{_nested_func_lhs} and $self->{_nested_func_lhs} eq $k ) - ); - ($s, @b); - } - else { - if (! length $k) { - if (is_literal_value ($v) ) { - belch 'Hash-pairs consisting of an empty string with a literal are deprecated, and will be removed in 2.0: use -and => [ $literal ] instead'; - } - else { - puke "Supplying an empty left hand side argument is not supported in hash-pairs"; - } - } - - my $method = $self->_METHOD_FOR_refkind("_where_hashpair", $v); - $self->$method($k, $v); - } - }; - - push @sql_clauses, $sql; - push @all_bind, @bind; - } - - return $self->_join_sql_clauses('and', \@sql_clauses, \@all_bind); -} - -sub _where_unary_op { - my ($self, $op, $rhs) = @_; - - $op =~ s/^-// if length($op) > 1; - - # top level special ops are illegal in general - puke "Illegal use of top-level '-$op'" - if !(defined $self->{_nested_func_lhs}) - and List::Util::first { $op =~ $_->{regex} } @{$self->{special_ops}} - and not List::Util::first { $op =~ $_->{regex} } @{$self->{unary_ops}}; - - if (my $op_entry = List::Util::first { $op =~ $_->{regex} } @{$self->{unary_ops}}) { - my $handler = $op_entry->{handler}; - - if (not ref $handler) { - if ($op =~ s/ [_\s]? \d+ $//x ) { - belch 'Use of [and|or|nest]_N modifiers is deprecated and will be removed in SQLA v2.0. ' - . "You probably wanted ...-and => [ -$op => COND1, -$op => COND2 ... ]"; - } - return $self->$handler($op, $rhs); - } - elsif (ref $handler eq 'CODE') { - return $handler->($self, $op, $rhs); - } - else { - puke "Illegal handler for operator $op - expecting a method name or a coderef"; - } - } - - $self->_debug("Generic unary OP: $op - recursing as function"); - - $self->_assert_pass_injection_guard($op); - - my ($sql, @bind) = $self->_SWITCH_refkind($rhs, { - SCALAR => sub { - puke "Illegal use of top-level '-$op'" - unless defined $self->{_nested_func_lhs}; - - return ( - $self->_convert('?'), - $self->_bindtype($self->{_nested_func_lhs}, $rhs) - ); - }, - FALLBACK => sub { - $self->_recurse_where($rhs) - }, - }); - - $sql = sprintf('%s %s', - $self->_sqlcase($op), - $sql, - ); - - return ($sql, @bind); -} - -sub _where_op_ANDOR { - my ($self, $op, $v) = @_; - - $self->_SWITCH_refkind($v, { - ARRAYREF => sub { - return $self->_where_ARRAYREF($v, $op); - }, - - HASHREF => sub { - return ($op =~ /^or/i) - ? $self->_where_ARRAYREF([ map { $_ => $v->{$_} } (sort keys %$v) ], $op) - : $self->_where_HASHREF($v); - }, - - SCALARREF => sub { - puke "-$op => \\\$scalar makes little sense, use " . - ($op =~ /^or/i - ? '[ \$scalar, \%rest_of_conditions ] instead' - : '-and => [ \$scalar, \%rest_of_conditions ] instead' - ); - }, - - ARRAYREFREF => sub { - puke "-$op => \\[...] makes little sense, use " . - ($op =~ /^or/i - ? '[ \[...], \%rest_of_conditions ] instead' - : '-and => [ \[...], \%rest_of_conditions ] instead' - ); - }, - - SCALAR => sub { # permissively interpreted as SQL - puke "-$op => \$value makes little sense, use -bool => \$value instead"; - }, - - UNDEF => sub { - puke "-$op => undef not supported"; - }, - }); -} - -sub _where_op_NEST { - my ($self, $op, $v) = @_; - - $self->_SWITCH_refkind($v, { - - SCALAR => sub { # permissively interpreted as SQL - belch "literal SQL should be -nest => \\'scalar' " - . "instead of -nest => 'scalar' "; - return ($v); - }, - - UNDEF => sub { - puke "-$op => undef not supported"; - }, - - FALLBACK => sub { - $self->_recurse_where($v); - }, - - }); -} - - -sub _where_op_BOOL { - my ($self, $op, $v) = @_; - - my ($s, @b) = $self->_SWITCH_refkind($v, { - SCALAR => sub { # interpreted as SQL column - $self->_convert($self->_quote($v)); - }, - - UNDEF => sub { - puke "-$op => undef not supported"; - }, - - FALLBACK => sub { - $self->_recurse_where($v); - }, - }); - - $s = "(NOT $s)" if $op =~ /^not/i; - ($s, @b); -} - - -sub _where_op_IDENT { - my $self = shift; - my ($op, $rhs) = splice @_, -2; - if (! defined $rhs or length ref $rhs) { - puke "-$op requires a single plain scalar argument (a quotable identifier)"; - } - - # in case we are called as a top level special op (no '=') - my $has_lhs = my $lhs = shift; - - $_ = $self->_convert($self->_quote($_)) for ($lhs, $rhs); - - return $has_lhs - ? "$lhs = $rhs" - : $rhs - ; -} - -sub _where_op_VALUE { - my $self = shift; - my ($op, $rhs) = splice @_, -2; - - # in case we are called as a top level special op (no '=') - my $lhs = shift; - - # special-case NULL - if (! defined $rhs) { - return defined $lhs - ? $self->_where_hashpair_HASHREF($lhs, { -is => undef }) - : undef - ; - } - - my @bind = - $self->_bindtype( - (defined $lhs ? $lhs : $self->{_nested_func_lhs}), - $rhs, - ) - ; - - return $lhs - ? ( - $self->_convert($self->_quote($lhs)) . ' = ' . $self->_convert('?'), - @bind - ) - : ( - $self->_convert('?'), - @bind, - ) - ; -} - - -my %unop_postfix = map +($_ => 1), 'is null', 'is not null'; +my %unop_postfix = map +($_ => 1), + 'is null', 'is not null', + 'asc', 'desc', +; my %special = ( (map +($_ => do { @@ -1228,14 +932,12 @@ my %special = ( unless $low->{-literal}; @{$low->{-literal}} } else { - local $self->{_nested_func_lhs} = $left->{-ident} - if ref($left) eq 'HASH' and $left->{-ident}; - my ($l, $h) = map [ $self->_where_unary_op(%$_) ], $low, $high; + my ($l, $h) = map [ $self->_render_expr($_) ], $low, $high; (join(' ', $l->[0], $self->_sqlcase('and'), $h->[0]), @{$l}[1..$#$l], @{$h}[1..$#$h]) } }; - my ($lhsql, @lhbind) = $self->_recurse_where($left); + my ($lhsql, @lhbind) = $self->_render_expr($left); return ( join(' ', '(', $lhsql, $self->_sqlcase($op), $rhsql, ')'), @lhbind, @rhbind @@ -1249,13 +951,11 @@ my %special = ( my ($lhs, $rhs) = @$args; my @in_bind; my @in_sql = map { - local $self->{_nested_func_lhs} = $lhs->{-ident} - if ref($lhs) eq 'HASH' and $lhs->{-ident}; - my ($sql, @bind) = $self->_where_unary_op(%$_); + my ($sql, @bind) = $self->_render_expr($_); push @in_bind, @bind; $sql; } @$rhs; - my ($lhsql, @lbind) = $self->_recurse_where($lhs); + my ($lhsql, @lbind) = $self->_render_expr($lhs); return ( $lhsql.' '.$self->_sqlcase($op).' ( ' .join(', ', @in_sql) @@ -1266,11 +966,11 @@ my %special = ( }), 'in', 'not in'), ); -sub _where_op_OP { - my ($self, undef, $v) = @_; +sub _render_op { + my ($self, $v) = @_; my ($op, @args) = @$v; $op =~ s/^-// if length($op) > 1; - local $self->{_nested_func_lhs}; + $op = lc($op); if (my $h = $special{$op}) { return $self->$h(\@args); } @@ -1281,7 +981,7 @@ sub _where_op_OP { } my $final_op = $op =~ /^(?:is|not)_/ ? join(' ', split '_', $op) : $op; if (@args == 1 and $op !~ /^(and|or)$/) { - my ($expr_sql, @bind) = $self->_recurse_where($args[0]); + my ($expr_sql, @bind) = $self->_render_expr($args[0]); my $op_sql = $self->_sqlcase($final_op); my $final_sql = ( $unop_postfix{lc($final_op)} @@ -1290,7 +990,7 @@ sub _where_op_OP { ); return (($op eq 'not' ? '('.$final_sql.')' : $final_sql), @bind); } else { - my @parts = map [ $self->_recurse_where($_) ], @args; + my @parts = map [ $self->_render_expr($_) ], @args; my ($final_sql) = map +($op =~ /^(and|or)$/ ? "(${_})" : $_), join( ' '.$self->_sqlcase($final_op).' ', map $_->[0], @parts @@ -1303,445 +1003,29 @@ sub _where_op_OP { die "unhandled"; } -sub _where_op_FUNC { - my ($self, undef, $rest) = @_; +sub _render_func { + my ($self, $rest) = @_; my ($func, @args) = @$rest; my @arg_sql; my @bind = map { my @x = @$_; push @arg_sql, shift @x; @x - } map [ $self->_recurse_where($_) ], @args; + } map [ $self->_render_expr($_) ], @args; return ($self->_sqlcase($func).'('.join(', ', @arg_sql).')', @bind); } -sub _where_op_BIND { - my ($self, undef, $bind) = @_; +sub _render_bind { + my ($self, $bind) = @_; return ($self->_convert('?'), $self->_bindtype(@$bind)); } -sub _where_op_LITERAL { - my ($self, undef, $literal) = @_; +sub _render_literal { + my ($self, $literal) = @_; $self->_assert_bindval_matches_bindtype(@{$literal}[1..$#$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 @@ -1780,13 +1064,16 @@ sub _open_outer_paren { sub _order_by { my ($self, $arg) = @_; - my (@sql, @bind); - for my $c ($self->_order_by_chunks($arg) ) { - $self->_SWITCH_refkind($c, { - SCALAR => sub { push @sql, $c }, - ARRAYREF => sub { push @sql, shift @$c; push @bind, @$c }, - }); - } + return '' unless defined($arg); + + my @chunks = $self->_order_by_chunks($arg); + + my @sql; + my @bind = map { + my ($s, @b) = $self->_render_expr($_); + push @sql, $s; + @b; + } @chunks; my $sql = @sql ? sprintf('%s %s', @@ -1802,57 +1089,28 @@ sub _order_by { sub _order_by_chunks { my ($self, $arg) = @_; - return $self->_SWITCH_refkind($arg, { - - ARRAYREF => sub { - map { $self->_order_by_chunks($_ ) } @$arg; - }, - - ARRAYREFREF => sub { - my ($s, @b) = @$$arg; - $self->_assert_bindval_matches_bindtype(@b); - [ $s, @b ]; - }, - - SCALAR => sub {$self->_quote($arg)}, - - UNDEF => sub {return () }, - - SCALARREF => sub {$$arg}, # literal SQL, no quoting - - HASHREF => sub { - # get first pair in hash - my ($key, $val, @rest) = %$arg; - - return () unless $key; - - if (@rest or not $key =~ /^-(desc|asc)/i) { - puke "hash passed to _order_by must have exactly one key (-desc or -asc)"; - } - - my $direction = $1; - - my @ret; - for my $c ($self->_order_by_chunks($val)) { - my ($sql, @bind); + if (ref($arg) eq 'ARRAY') { + return map $self->_order_by_chunks($_), @$arg; + } + if (my $l = is_literal_value($arg)) { + return +{ -literal => $l }; + } + if (!ref($arg)) { + return +{ -ident => $arg }; + } + if (ref($arg) eq 'HASH') { + my ($key, $val, @rest) = %$arg; - $self->_SWITCH_refkind($c, { - SCALAR => sub { - $sql = $c; - }, - ARRAYREF => sub { - ($sql, @bind) = @$c; - }, - }); + return () unless $key; - $sql = $sql . ' ' . $self->_sqlcase($direction); + if (@rest or not $key =~ /^-(desc|asc)/i) { + puke "hash passed to _order_by must have exactly one key (-desc or -asc)"; + } - push @ret, [ $sql, @bind]; - } + my $dir = $1; - return @ret; - }, - }); + map +{ -op => [ $dir, $_ ] }, $self->_order_by_chunks($val); + }; }