package SQL::Translator::Parser::SQLite;
-# -------------------------------------------------------------------
-# Copyright (C) 2002-2009 SQLFairy Authors
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License as
-# published by the Free Software Foundation; version 2.
-#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-# 02111-1307 USA
-# -------------------------------------------------------------------
-
=head1 NAME
SQL::Translator::Parser::SQLite - parser for SQLite
=head1 DESCRIPTION
-This is a grammar for parsing CREATE statements for SQLite as
+This is a grammar for parsing CREATE statements for SQLite as
described here:
http://www.sqlite.org/lang.html
CREATE INDEX
sql-statement ::=
- CREATE [TEMP | TEMPORARY] [UNIQUE] INDEX index-name
+ CREATE [TEMP | TEMPORARY] [UNIQUE] INDEX index-name
ON [database-name .] table-name ( column-name [, column-name]* )
[ ON CONFLICT conflict-algorithm ]
trigger-action
database-event ::=
- DELETE |
- INSERT |
- UPDATE |
+ DELETE |
+ INSERT |
+ UPDATE |
UPDATE OF column-list
trigger-action ::=
- [ FOR EACH ROW | FOR EACH STATEMENT ] [ WHEN expression ]
- BEGIN
+ [ FOR EACH ROW | FOR EACH STATEMENT ] [ WHEN expression ]
+ BEGIN
trigger-step ; [ trigger-step ; ]*
END
trigger-step ::=
- update-statement | insert-statement |
+ update-statement | insert-statement |
delete-statement | select-statement
CREATE VIEW
=cut
use strict;
-use vars qw[ $DEBUG $VERSION $GRAMMAR @EXPORT_OK ];
-$VERSION = '1.59';
+use warnings;
+
+our $VERSION = '1.62';
+
+our $DEBUG;
$DEBUG = 0 unless defined $DEBUG;
use Data::Dumper;
-use Parse::RecDescent;
-use Exporter;
+use SQL::Translator::Utils qw/ddl_parser_instance/;
+
use base qw(Exporter);
+our @EXPORT_OK = qw(parse);
-@EXPORT_OK = qw(parse);
+our $GRAMMAR = <<'END_OF_GRAMMAR';
-# Enable warnings within the Parse::RecDescent module.
-$::RD_ERRORS = 1; # Make sure the parser dies when it encounters an error
-$::RD_WARN = 1; # Enable warnings. This will warn on unused rules &c.
-$::RD_HINT = 1; # Give out hints to help fix problems.
+{
+ my ( %tables, $table_order, @table_comments, @views, @triggers );
-$GRAMMAR = q!
+ sub _err {
+ my $max_lines = 5;
+ my @up_to_N_lines = split (/\n/, $_[1], $max_lines + 1);
+ die sprintf ("Unable to parse line %d:\n%s\n",
+ $_[0],
+ join "\n", (map { "'$_'" } @up_to_N_lines[0..$max_lines - 1 ]), @up_to_N_lines > $max_lines ? '...' : ()
+ );
+ }
-{
- my ( %tables, $table_order, @table_comments, @views, @triggers );
}
#
# The "eofile" rule makes the parser fail if any "statement" rule
-# fails. Otherwise, the first successful match by a "statement"
+# fails. Otherwise, the first successful match by a "statement"
# won't cause the failure needed to know that the parse, as a whole,
# failed. -ky
#
-startrule : statement(s) eofile {
+startrule : statement(s) eofile {
$return = {
- tables => \%tables,
+ tables => \%tables,
views => \@views,
triggers => \@triggers,
}
| drop
| comment
| create
- | <error>
+ | /^\Z/ | { _err ($thisline, $text) }
begin_transaction : /begin/i TRANSACTION(?) SEMICOLON
$return = $comment;
}
-comment : /\/\*/ /[^\*]+/ /\*\//
+comment : /\/\*/ /[^\*]+/ /\*\//
{
my $comment = $item[2];
$comment =~ s/^\s*|\s*$//g;
my $db_name = $item[7]->{'db_name'} || '';
my $table_name = $item[7]->{'name'};
- my $index = {
+ my $index = {
name => $item[5],
fields => $item[8],
on_conflict => $item[9][0],
}
}
-definition : constraint_def | column_def
+definition : constraint_def | column_def
column_def: comment(s?) NAME type(?) column_constraint_def(s?)
{
$return = {
type => 'primary_key',
sort_order => $item[2][0],
- on_conflict => $item[2][0],
+ on_conflict => $item[2][0],
}
}
|
{
$return = {
type => 'unique',
- on_conflict => $item[2][0],
+ on_conflict => $item[2][0],
}
}
|
$return = {
type => 'check',
expression => $item[3],
- on_conflict => $item[5][0],
+ on_conflict => $item[5][0],
}
}
|
}
}
|
- REFERENCES ref_def
+ REFERENCES ref_def cascade_def(?)
{
$return = {
type => 'foreign_key',
reference_table => $item[2]{'reference_table'},
reference_fields => $item[2]{'reference_fields'},
+ on_delete => $item[3][0]{'on_delete'},
+ on_update => $item[3][0]{'on_update'},
}
}
|
}
}
|
- FOREIGN_KEY parens_field_list REFERENCES ref_def
+ FOREIGN_KEY parens_field_list REFERENCES ref_def cascade_def(?)
{
$return = {
supertype => 'constraint',
fields => $item[2],
reference_table => $item[4]{'reference_table'},
reference_fields => $item[4]{'reference_fields'},
+ on_delete => $item[5][0]{'on_delete'},
+ on_update => $item[5][0]{'on_update'},
}
}
-ref_def : /(\w+)\s*\((\w+)\)/
- { $return = { reference_table => $1, reference_fields => $2 } }
+ref_def : table_name parens_field_list
+ { $return = { reference_table => $item[1]{name}, reference_fields => $item[2] } }
+
+cascade_def : cascade_update_def cascade_delete_def(?)
+ { $return = { on_update => $item[1], on_delete => $item[2][0] } }
+ |
+ cascade_delete_def cascade_update_def(?)
+ { $return = { on_delete => $item[1], on_update => $item[2][0] } }
+
+cascade_delete_def : /on\s+delete\s+(set null|set default|cascade|restrict|no action)/i
+ { $return = $1}
+
+cascade_update_def : /on\s+update\s+(set null|set default|cascade|restrict|no action)/i
+ { $return = $1}
table_name : qualified_name
-
-qualified_name : NAME
+
+qualified_name : NAME
{ $return = { name => $item[1] } }
-qualified_name : /(\w+)\.(\w+)/
+qualified_name : /(\w+)\.(\w+)/
{ $return = { db_name => $1, name => $2 } }
field_name : NAME
parens_value_list : '(' VALUE(s /,/) ')'
{ $item[2] }
-expr : /[^)]+/
+expr : /[^)]* \( [^)]+ \) [^)]*/x # parens, balanced one deep
+ | /[^)]+/
sort_order : /(ASC|DESC)/i
when : WHEN expr { $item[2] }
string :
- /'(\\.|''|[^\\\'])*'/
+ /'(\.|''|[^\\'])*'/
nonstring : /[^;\'"]+/
trigger_step : /(select|delete|insert|update)/i statement_body(s?) SEMICOLON
{
$return = join( ' ', $item[1], join ' ', @{ $item[2] || [] } )
- }
+ }
before_or_after : /(before|after)/i { $return = lc $1 }
#
# Create View
#
-create : CREATE TEMPORARY(?) VIEW view_name AS select_statement
+create : CREATE TEMPORARY(?) VIEW view_name AS select_statement
{
push @views, {
name => $item[4]->{'name'},
- sql => $item[6],
+ sql => $item[6],
is_temporary => $item[2][0] ? 1 : 0,
}
}
SEMICOLON : ';'
-NAME : /["']?(\w+)["']?/ { $return = $1 }
+NAME : /\w+/
+ | DQSTRING
+ | SQSTRING
+
+DQSTRING : '"' <skip: ''> /((?:[^"]|"")+)/ '"'
+ { ($return = $item[3]) =~ s/""/"/g }
-VALUE : /[-+]?\.?\d+(?:[eE]\d+)?/
+SQSTRING : "'" <skip: ''> /((?:[^']|'')*)/ "'"
+ { ($return = $item[3]) =~ s/''/'/g }
+
+VALUE : /[-+]?\d*\.?\d+(?:[eE]\d+)?/
{ $item[1] }
- | /'.*?'/
- {
- # remove leading/trailing quotes
- my $val = $item[1];
- $val =~ s/^['"]|['"]$//g;
- $return = $val;
- }
- | /NULL/
+ | SQSTRING
+ | /NULL/i
{ 'NULL' }
| /CURRENT_TIMESTAMP/i
{ 'CURRENT_TIMESTAMP' }
-!;
+END_OF_GRAMMAR
+
-# -------------------------------------------------------------------
sub parse {
my ( $translator, $data ) = @_;
- my $parser = Parse::RecDescent->new($GRAMMAR);
+
+ # Enable warnings within the Parse::RecDescent module.
+ local $::RD_ERRORS = 1 unless defined $::RD_ERRORS; # Make sure the parser dies when it encounters an error
+ local $::RD_WARN = 1 unless defined $::RD_WARN; # Enable warnings. This will warn on unused rules &c.
+ local $::RD_HINT = 1 unless defined $::RD_HINT; # Give out hints to help fix problems.
local $::RD_TRACE = $translator->trace ? 1 : undef;
local $DEBUG = $translator->debug;
- unless (defined $parser) {
- return $translator->error("Error instantiating Parse::RecDescent ".
- "instance: Bad grammer");
- }
+ my $parser = ddl_parser_instance('SQLite');
my $result = $parser->startrule($data);
return $translator->error( "Parse failed." ) unless defined $result;
warn Dumper( $result ) if $DEBUG;
my $schema = $translator->schema;
- my @tables =
+ my @tables =
map { $_->[1] }
- sort { $a->[0] <=> $b->[0] }
+ sort { $a->[0] <=> $b->[0] }
map { [ $result->{'tables'}{ $_ }->{'order'}, $_ ] }
keys %{ $result->{'tables'} };
for my $table_name ( @tables ) {
my $tdata = $result->{'tables'}{ $table_name };
- my $table = $schema->add_table(
+ my $table = $schema->add_table(
name => $tdata->{'name'},
) or die $schema->error;
reference_table => $cdata->{'reference_table'},
reference_fields => $cdata->{'reference_fields'},
match_type => $cdata->{'match_type'} || '',
- on_delete => $cdata->{'on_delete'}
+ on_delete => $cdata->{'on_delete'}
|| $cdata->{'on_delete_do'},
- on_update => $cdata->{'on_update'}
+ on_update => $cdata->{'on_update'}
|| $cdata->{'on_update_do'},
) or die $table->error;
}
database_events => $def->{'db_events'},
action => $def->{'action'},
on_table => $def->{'on_table'},
+ scope => 'row', # SQLite only supports row triggers
);
}
1;
# -------------------------------------------------------------------
-# All wholsome food is caught without a net or a trap.
+# All wholesome food is caught without a net or a trap.
# William Blake
# -------------------------------------------------------------------