SQL::Translator::Parser::PostgreSQL - parser for PostgreSQL
Index
Code Index:
NAME
SQL::Translator::Parser::PostgreSQL - parser for PostgreSQL
SYNOPSIS
use SQL::Translator;
use SQL::Translator::Parser::PostgreSQL;
my $translator = SQL::Translator->new;
$translator->parser("SQL::Translator::Parser::PostgreSQL");
DESCRIPTION
The grammar was started from the MySQL parsers. Here is the description
from PostgreSQL:
Table:
(http://www.postgresql.org/docs/view.php?version=7.3&idoc=1&file=sql-createtable.html)
CREATE [ [ LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name (
{ column_name data_type [ DEFAULT default_expr ]
[ column_constraint [, ... ] ]
| table_constraint } [, ... ]
)
[ INHERITS ( parent_table [, ... ] ) ]
[ WITH OIDS | WITHOUT OIDS ]
where column_constraint is:
[ CONSTRAINT constraint_name ]
{ NOT NULL | NULL | UNIQUE | PRIMARY KEY |
CHECK (expression) |
REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL ]
[ ON DELETE action ] [ ON UPDATE action ] }
[ DEFERRABLE | NOT DEFERRABLE ]
[ INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
and table_constraint is:
[ CONSTRAINT constraint_name ]
{ UNIQUE ( column_name [, ... ] ) |
PRIMARY KEY ( column_name [, ... ] ) |
CHECK ( expression ) |
FOREIGN KEY ( column_name [, ... ] )
REFERENCES reftable [ ( refcolumn [, ... ] ) ]
[ MATCH FULL | MATCH PARTIAL ]
[ ON DELETE action ] [ ON UPDATE action ] }
[ DEFERRABLE | NOT DEFERRABLE ]
[ INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
Index:
(http://www.postgresql.org/docs/view.php?version=7.3&idoc=1&file=sql-createindex.html)
CREATE [ UNIQUE ] INDEX index_name ON table
[ USING acc_method ] ( column [ ops_name ] [, ...] )
[ WHERE predicate ]
CREATE [ UNIQUE ] INDEX index_name ON table
[ USING acc_method ] ( func_name( column [, ... ]) [ ops_name ] )
[ WHERE predicate ]
Alter table:
ALTER TABLE [ ONLY ] table [ * ]
ADD [ COLUMN ] column type [ column_constraint [ ... ] ]
ALTER TABLE [ ONLY ] table [ * ]
ALTER [ COLUMN ] column { SET DEFAULT value | DROP DEFAULT }
ALTER TABLE [ ONLY ] table [ * ]
ALTER [ COLUMN ] column SET STATISTICS integer
ALTER TABLE [ ONLY ] table [ * ]
RENAME [ COLUMN ] column TO newcolumn
ALTER TABLE table
RENAME TO new_table
ALTER TABLE table
ADD table_constraint_definition
ALTER TABLE [ ONLY ] table
DROP CONSTRAINT constraint { RESTRICT | CASCADE }
ALTER TABLE table
OWNER TO new_owner
View table:
CREATE [ OR REPLACE ] VIEW view [ ( column name list ) ] AS SELECT query
AUTHORS
Ken Y. Clark <kclark@cpan.org>,
Allen Day <allenday@ucla.edu>.
SEE ALSO
perl(1), Parse::RecDescent.
package SQL::Translator::Parser::PostgreSQL;
# -------------------------------------------------------------------
# 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
# -------------------------------------------------------------------
use strict;
use vars qw[ $DEBUG $VERSION $GRAMMAR @EXPORT_OK ];
$VERSION = '1.59';
$DEBUG = 0 unless defined $DEBUG;
use Data::Dumper;
use Parse::RecDescent;
use Exporter;
use base qw(Exporter);
@EXPORT_OK = qw(parse);
# 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.
$GRAMMAR = q!
{ my ( %tables, @views, $table_order, $field_order, @table_comments) }
#
# The "eofile" rule makes the parser fail if any "statement" rule
# 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 { { tables => \%tables, views => \@views } }
eofile : /^\Z/
statement : create
| comment_on_table
| comment_on_column
| comment_on_other
| comment
| alter
| grant
| revoke
| drop
| insert
| connect
| update
| set
| select
| copy
| readin_symbol
| commit
| <error>
commit : /commit/i ';'
connect : /^\s*\\\connect.*\n/
set : /set/i /[^;]*/ ';'
revoke : /revoke/i WORD(s /,/) /on/i TABLE(?) table_id /from/i name_with_opt_quotes(s /,/) ';'
{
my $table_info = $item{'table_id'};
my $schema_name = $table_info->{'schema_name'};
my $table_name = $table_info->{'table_name'};
push @{ $tables{ $table_name }{'permissions'} }, {
type => 'revoke',
actions => $item[2],
users => $item[7],
}
}
revoke : /revoke/i WORD(s /,/) /on/i SCHEMA(?) schema_name /from/i name_with_opt_quotes(s /,/) ';'
{ 1 }
grant : /grant/i WORD(s /,/) /on/i TABLE(?) table_id /to/i name_with_opt_quotes(s /,/) ';'
{
my $table_info = $item{'table_id'};
my $schema_name = $table_info->{'schema_name'};
my $table_name = $table_info->{'table_name'};
push @{ $tables{ $table_name }{'permissions'} }, {
type => 'grant',
actions => $item[2],
users => $item[7],
}
}
grant : /grant/i WORD(s /,/) /on/i SCHEMA(?) schema_name /to/i name_with_opt_quotes(s /,/) ';'
{ 1 }
drop : /drop/i /[^;]*/ ';'
string :
/'(\\.|''|[^\\\'])*'/
nonstring : /[^;\'"]+/
statement_body : string | nonstring
insert : /insert/i statement_body(s?) ';'
update : /update/i statement_body(s?) ';'
#
# Create table.
#
create : CREATE temporary(?) TABLE table_id '(' create_definition(s? /,/) ')' table_option(s?) ';'
{
my $table_info = $item{'table_id'};
my $schema_name = $table_info->{'schema_name'};
my $table_name = $table_info->{'table_name'};
$tables{ $table_name }{'order'} = ++$table_order;
$tables{ $table_name }{'schema_name'} = $schema_name;
$tables{ $table_name }{'table_name'} = $table_name;
$tables{ $table_name }{'temporary'} = $item[2][0];
if ( @table_comments ) {
$tables{ $table_name }{'comments'} = [ @table_comments ];
@table_comments = ();
}
my @constraints;
for my $definition ( @{ $item[6] } ) {
if ( $definition->{'supertype'} eq 'field' ) {
my $field_name = $definition->{'name'};
$tables{ $table_name }{'fields'}{ $field_name } =
{ %$definition, order => $field_order++ };
for my $constraint ( @{ $definition->{'constraints'} || [] } ) {
$constraint->{'fields'} = [ $field_name ];
push @{ $tables{ $table_name }{'constraints'} },
$constraint;
}
}
elsif ( $definition->{'supertype'} eq 'constraint' ) {
push @{ $tables{ $table_name }{'constraints'} }, $definition;
}
elsif ( $definition->{'supertype'} eq 'index' ) {
push @{ $tables{ $table_name }{'indices'} }, $definition;
}
}
for my $option ( @{ $item[8] } ) {
$tables{ $table_name }{'table_options(s?)'}{ $option->{'type'} } =
$option;
}
1;
}
create : CREATE unique(?) /(index|key)/i index_name /on/i table_id using_method(?) '(' field_name(s /,/) ')' where_predicate(?) ';'
{
my $table_info = $item{'table_id'};
my $schema_name = $table_info->{'schema_name'};
my $table_name = $table_info->{'table_name'};
push @{ $tables{ $table_name }{'indices'} },
{
name => $item{'index_name'},
supertype => $item{'unique'}[0] ? 'constraint' : 'index',
type => $item{'unique'}[0] ? 'unique' : 'normal',
fields => $item[9],
method => $item{'using_method'}[0],
}
;
}
create : CREATE or_replace(?) temporary(?) VIEW view_id view_fields(?) /AS/i view_target ';'
{
push @views, {
schema_name => $item{view_id}{schema_name},
view_name => $item{view_id}{view_name},
sql => $item{view_target},
fields => $item[6],
is_temporary => $item[3][0],
}
}
#
# Create anything else (e.g., domain, etc.)
#
create : CREATE WORD /[^;]+/ ';'
{ @table_comments = (); }
using_method : /using/i WORD { $item[2] }
where_predicate : /where/i /[^;]+/
create_definition : field
| table_constraint
| <error>
comment : /^\s*(?:#|-{2})(.*)\n/
{
my $comment = $item[1];
$comment =~ s/^\s*(#|-*)\s*//;
$comment =~ s/\s*$//;
$return = $comment;
push @table_comments, $comment;
}
comment_on_table : /comment/i /on/i /table/i table_id /is/i comment_phrase ';'
{
my $table_info = $item{'table_id'};
my $schema_name = $table_info->{'schema_name'};
my $table_name = $table_info->{'table_name'};
push @{ $tables{ $table_name }{'comments'} }, $item{'comment_phrase'};
}
comment_on_column : /comment/i /on/i /column/i column_name /is/i comment_phrase ';'
{
my $table_name = $item[4]->{'table'};
my $field_name = $item[4]->{'field'};
if ($tables{ $table_name }{'fields'}{ $field_name } ) {
push @{ $tables{ $table_name }{'fields'}{ $field_name }{'comments'} },
$item{'comment_phrase'};
}
else {
die "No such column as $table_name.$field_name";
}
}
comment_on_other : /comment/i /on/i /\w+/ /\w+/ /is/i comment_phrase ';'
{
push(@table_comments, $item{'comment_phrase'});
}
# [added by cjm 20041019]
# [TODO: other comment-on types]
# for now we just have a general mechanism for handling other
# kinds of comments than table/column; I'm not sure of the best
# way to incorporate these into the datamodel
#
# this is the exhaustive list of types of comment:
#COMMENT ON DATABASE my_database IS 'Development Database';
#COMMENT ON INDEX my_index IS 'Enforces uniqueness on employee id';
#COMMENT ON RULE my_rule IS 'Logs UPDATES of employee records';
#COMMENT ON SEQUENCE my_sequence IS 'Used to generate primary keys';
#COMMENT ON TABLE my_table IS 'Employee Information';
#COMMENT ON TYPE my_type IS 'Complex Number support';
#COMMENT ON VIEW my_view IS 'View of departmental costs';
#COMMENT ON COLUMN my_table.my_field IS 'Employee ID number';
#COMMENT ON TRIGGER my_trigger ON my_table IS 'Used for R.I.';
#
# this is tested by test 08
column_name : NAME '.' NAME
{ $return = { table => $item[1], field => $item[3] } }
comment_phrase : /null/i
{ $return = 'NULL' }
comment_phrase : /'/ comment_phrase_unquoted(s) /'/
{ my $phrase = join(' ', @{ $item[2] });
$return = $phrase}
# [cjm TODO: double-single quotes in a comment_phrase]
comment_phrase_unquoted : /[^\']*/
{ $return = $item[1] }
xxxcomment_phrase : /'.*?'|NULL/
{
my $val = $item[1] || '';
$val =~ s/^'|'$//g;
$return = $val;
}
field : field_comment(s?) field_name data_type field_meta(s?) field_comment(s?)
{
my ( $default, @constraints, $is_pk );
my $is_nullable = 1;
for my $meta ( @{ $item[4] } ) {
if ( $meta->{'type'} eq 'default' ) {
$default = $meta;
next;
}
elsif ( $meta->{'type'} eq 'not_null' ) {
$is_nullable = 0;
}
elsif ( $meta->{'type'} eq 'primary_key' ) {
$is_pk = 1;
}
push @constraints, $meta if $meta->{'supertype'} eq 'constraint';
}
my @comments = ( @{ $item[1] }, @{ $item[5] } );
$return = {
supertype => 'field',
name => $item{'field_name'},
data_type => $item{'data_type'}{'type'},
size => $item{'data_type'}{'size'},
is_nullable => $is_nullable,
default => $default->{'value'},
constraints => [ @constraints ],
comments => [ @comments ],
is_primary_key => $is_pk || 0,
is_auto_increment => $item{'data_type'}{'is_auto_increment'},
}
}
| <error>
field_comment : /^\s*(?:#|-{2})(.*)\n/
{
my $comment = $item[1];
$comment =~ s/^\s*(#|-*)\s*//;
$comment =~ s/\s*$//;
$return = $comment;
}
field_meta : default_val
| column_constraint
view_fields : '(' field_name(s /,/) ')'
{ $return = join (',', @{$item[2]} ) }
column_constraint : constraint_name(?) column_constraint_type deferrable(?) deferred(?)
{
my $desc = $item{'column_constraint_type'};
my $type = $desc->{'type'};
my $fields = $desc->{'fields'} || [];
my $expression = $desc->{'expression'} || '';
$return = {
supertype => 'constraint',
name => $item{'constraint_name'}[0] || '',
type => $type,
expression => $type eq 'check' ? $expression : '',
deferrable => $item{'deferrable'},
deferred => $item{'deferred'},
reference_table => $desc->{'reference_table'},
reference_fields => $desc->{'reference_fields'},
match_type => $desc->{'match_type'},
on_delete => $desc->{'on_delete'} || $desc->{'on_delete_do'},
on_update => $desc->{'on_update'} || $desc->{'on_update_do'},
}
}
constraint_name : /constraint/i name_with_opt_quotes { $item[2] }
column_constraint_type : /not null/i { $return = { type => 'not_null' } }
|
/null/i
{ $return = { type => 'null' } }
|
/unique/i
{ $return = { type => 'unique' } }
|
/primary key/i
{ $return = { type => 'primary_key' } }
|
/check/i '(' /[^)]+/ ')'
{ $return = { type => 'check', expression => $item[3] } }
|
/references/i table_id parens_word_list(?) match_type(?) key_action(s?)
{
my $table_info = $item{'table_id'};
my $schema_name = $table_info->{'schema_name'};
my $table_name = $table_info->{'table_name'};
my ( $on_delete, $on_update );
for my $action ( @{ $item[5] || [] } ) {
$on_delete = $action->{'action'} if $action->{'type'} eq 'delete';
$on_update = $action->{'action'} if $action->{'type'} eq 'update';
}
$return = {
type => 'foreign_key',
reference_table => $table_name,
reference_fields => $item[3][0],
match_type => $item[4][0],
on_delete => $on_delete,
on_update => $on_update,
}
}
table_id : schema_qualification(?) name_with_opt_quotes {
$return = { schema_name => $item[1][0], table_name => $item[2] }
}
view_id : schema_qualification(?) name_with_opt_quotes {
$return = { schema_name => $item[1][0], view_name => $item[2] }
}
view_target : /select|with/i /[^;]+/ {
$return = "$item[1] $item[2]";
}
# SELECT views _may_ support outer parens, and we used to produce
# such sql, although non-standard. Use ugly lookeahead to parse
view_target : '(' /select/i / [^;]+ (?= \) ) /x ')' {
$return = "$item[2] $item[3]"
}
view_target_spec :
schema_qualification : name_with_opt_quotes '.'
schema_name : name_with_opt_quotes
field_name : name_with_opt_quotes
name_with_opt_quotes : double_quote(?) NAME double_quote(?) { $item[2] }
double_quote: /"/
index_name : name_with_opt_quotes
data_type : pg_data_type parens_value_list(?)
{
my $data_type = $item[1];
#
# We can deduce some sizes from the data type's name.
#
if ( my $size = $item[2][0] ) {
$data_type->{'size'} = $size;
}
$return = $data_type;
}
pg_data_type :
/(bigint|int8)/i
{
$return = {
type => 'integer',
size => 20,
};
}
|
/(smallint|int2)/i
{
$return = {
type => 'integer',
size => 5,
};
}
|
/interval/i
{
$return = { type => 'interval' };
}
|
/(integer|int4?)/i # interval must come before this
{
$return = {
type => 'integer',
size => 10,
};
}
|
/(real|float4)/i
{
$return = {
type => 'real',
size => 10,
};
}
|
/(double precision|float8?)/i
{
$return = {
type => 'float',
size => 20,
};
}
|
/(bigserial|serial8)/i
{
$return = {
type => 'integer',
size => 20,
is_auto_increment => 1,
};
}
|
/serial4?/i
{
$return = {
type => 'integer',
size => 11,
is_auto_increment => 1,
};
}
|
/(bit varying|varbit)/i
{
$return = { type => 'varbit' };
}
|
/character varying/i
{
$return = { type => 'varchar' };
}
|
/char(acter)?/i
{
$return = { type => 'char' };
}
|
/bool(ean)?/i
{
$return = { type => 'boolean' };
}
|
/bytea/i
{
$return = { type => 'bytea' };
}
|
/(timestamptz|timestamp)(?:\(\d\))?( with(?:out)? time zone)?/i
{
$return = { type => 'timestamp' . ($2||'') };
}
|
/text/i
{
$return = {
type => 'text',
size => 64_000,
};
}
|
/(bit|box|cidr|circle|date|inet|line|lseg|macaddr|money|numeric|decimal|path|point|polygon|timetz|time|varchar)/i
{
$return = { type => $item[1] };
}
parens_value_list : '(' VALUE(s /,/) ')'
{ $item[2] }
parens_word_list : '(' name_with_opt_quotes(s /,/) ')'
{ $item[2] }
field_size : '(' num_range ')' { $item{'num_range'} }
num_range : DIGITS ',' DIGITS
{ $return = $item[1].','.$item[3] }
| DIGITS
{ $return = $item[1] }
table_constraint : comment(s?) constraint_name(?) table_constraint_type deferrable(?) deferred(?) comment(s?)
{
my $desc = $item{'table_constraint_type'};
my $type = $desc->{'type'};
my $fields = $desc->{'fields'};
my $expression = $desc->{'expression'};
my @comments = ( @{ $item[1] }, @{ $item[-1] } );
$return = {
name => $item[2][0] || '',
supertype => 'constraint',
type => $type,
fields => $type ne 'check' ? $fields : [],
expression => $type eq 'check' ? $expression : '',
deferrable => $item{'deferrable'},
deferred => $item{'deferred'},
reference_table => $desc->{'reference_table'},
reference_fields => $desc->{'reference_fields'},
match_type => $desc->{'match_type'},
on_delete => $desc->{'on_delete'} || $desc->{'on_delete_do'},
on_update => $desc->{'on_update'} || $desc->{'on_update_do'},
comments => [ @comments ],
}
}
table_constraint_type : /primary key/i '(' name_with_opt_quotes(s /,/) ')'
{
$return = {
type => 'primary_key',
fields => $item[3],
}
}
|
/unique/i '(' name_with_opt_quotes(s /,/) ')'
{
$return = {
type => 'unique',
fields => $item[3],
}
}
|
/check/i '(' /[^)]+/ ')'
{
$return = {
type => 'check',
expression => $item[3],
}
}
|
/foreign key/i '(' name_with_opt_quotes(s /,/) ')' /references/i table_id parens_word_list(?) match_type(?) key_action(s?)
{
my ( $on_delete, $on_update );
for my $action ( @{ $item[9] || [] } ) {
$on_delete = $action->{'action'} if $action->{'type'} eq 'delete';
$on_update = $action->{'action'} if $action->{'type'} eq 'update';
}
$return = {
supertype => 'constraint',
type => 'foreign_key',
fields => $item[3],
reference_table => $item[6]->{'table_name'},
reference_fields => $item[7][0],
match_type => $item[8][0],
on_delete => $on_delete || '',
on_update => $on_update || '',
}
}
deferrable : not(?) /deferrable/i
{
$return = ( $item[1] =~ /not/i ) ? 0 : 1;
}
deferred : /initially/i /(deferred|immediate)/i { $item[2] }
match_type : /match/i /partial|full|simple/i { $item[2] }
key_action : key_delete
|
key_update
key_delete : /on delete/i key_mutation
{
$return = {
type => 'delete',
action => $item[2],
};
}
key_update : /on update/i key_mutation
{
$return = {
type => 'update',
action => $item[2],
};
}
key_mutation : /no action/i { $return = 'no_action' }
|
/restrict/i { $return = 'restrict' }
|
/cascade/i { $return = 'cascade' }
|
/set null/i { $return = 'set null' }
|
/set default/i { $return = 'set default' }
alter : alter_table table_id add_column field ';'
{
my $field_def = $item[4];
$tables{ $item[2]->{'table_name'} }{'fields'}{ $field_def->{'name'} } = {
%$field_def, order => $field_order++
};
1;
}
alter : alter_table table_id ADD table_constraint ';'
{
my $table_name = $item[2]->{'table_name'};
my $constraint = $item[4];
push @{ $tables{ $table_name }{'constraints'} }, $constraint;
1;
}
alter : alter_table table_id drop_column NAME restrict_or_cascade(?) ';'
{
$tables{ $item[2]->{'table_name'} }{'fields'}{ $item[4] }{'drop'} = 1;
1;
}
alter : alter_table table_id alter_column NAME alter_default_val ';'
{
$tables{ $item[2]->{'table_name'} }{'fields'}{ $item[4] }{'default'} =
$item[5]->{'value'};
1;
}
#
# These will just parse for now but won't affect the structure. - ky
#
alter : alter_table table_id /rename/i /to/i NAME ';'
{ 1 }
alter : alter_table table_id alter_column NAME SET /statistics/i INTEGER ';'
{ 1 }
alter : alter_table table_id alter_column NAME SET /storage/i storage_type ';'
{ 1 }
alter : alter_table table_id rename_column NAME /to/i NAME ';'
{ 1 }
alter : alter_table table_id DROP /constraint/i NAME restrict_or_cascade ';'
{ 1 }
alter : alter_table table_id /owner/i /to/i NAME ';'
{ 1 }
alter : alter_sequence NAME /owned/i /by/i column_name ';'
{ 1 }
storage_type : /(plain|external|extended|main)/i
temporary : /temp(orary)?\\b/i
{
1;
}
or_replace : /or replace/i
alter_default_val : SET default_val
{
$return = { value => $item[2]->{'value'} }
}
| DROP DEFAULT
{
$return = { value => undef }
}
#
# This is a little tricky to get right, at least WRT to making the
# tests pass. The problem is that the constraints are stored just as
# a list (no name access), and the tests expect the constraints in a
# particular order. I'm going to leave the rule but disable the code
# for now. - ky
#
alter : alter_table table_id alter_column NAME alter_nullable ';'
{
# my $table_name = $item[2]->{'table_name'};
# my $field_name = $item[4];
# my $is_nullable = $item[5]->{'is_nullable'};
#
# $tables{ $table_name }{'fields'}{ $field_name }{'is_nullable'} =
# $is_nullable;
#
# if ( $is_nullable ) {
# 1;
# push @{ $tables{ $table_name }{'constraints'} }, {
# type => 'not_null',
# fields => [ $field_name ],
# };
# }
# else {
# for my $i (
# 0 .. $#{ $tables{ $table_name }{'constraints'} || [] }
# ) {
# my $c = $tables{ $table_name }{'constraints'}[ $i ] or next;
# my $fields = join( '', @{ $c->{'fields'} || [] } ) or next;
# if ( $c->{'type'} eq 'not_null' && $fields eq $field_name ) {
# delete $tables{ $table_name }{'constraints'}[ $i ];
# last;
# }
# }
# }
1;
}
alter_nullable : SET not_null
{
$return = { is_nullable => 0 }
}
| DROP not_null
{
$return = { is_nullable => 1 }
}
not_null : /not/i /null/i
not : /not/i
add_column : ADD COLUMN(?)
alter_table : ALTER TABLE ONLY(?)
alter_sequence : ALTER SEQUENCE
drop_column : DROP COLUMN(?)
alter_column : ALTER COLUMN(?)
rename_column : /rename/i COLUMN(?)
restrict_or_cascade : /restrict/i |
/cascade/i
# Handle functions that can be called
select : SELECT select_function ';'
{ 1 }
# Read the setval function but don't do anything with it because this parser
# isn't handling sequences
select_function : schema_qualification(?) /setval/i '(' VALUE /,/ VALUE /,/ /(true|false)/i ')'
{ 1 }
# Skipping all COPY commands
copy : COPY WORD /[^;]+/ ';' { 1 }
{ 1 }
# The "\." allows reading in from STDIN but this isn't needed for schema
# creation, so it is skipped.
readin_symbol : '\.'
{1}
#
# End basically useless stuff. - ky
#
create_table : CREATE TABLE
create_index : CREATE /index/i
default_val : DEFAULT /(\d+|'[^']*'|\w+\(.*\))|\w+/
{
my $val = defined $item[2] ? $item[2] : '';
$val =~ s/^'|'$//g;
$return = {
supertype => 'constraint',
type => 'default',
value => $val,
}
}
| /null/i
{
$return = {
supertype => 'constraint',
type => 'default',
value => 'NULL',
}
}
name_with_opt_paren : NAME parens_value_list(s?)
{ $item[2][0] ? "$item[1]($item[2][0][0])" : $item[1] }
unique : /unique/i { 1 }
key : /key/i | /index/i
table_option : /inherits/i '(' name_with_opt_quotes(s /,/) ')'
{
$return = { type => 'inherits', table_name => $item[3] }
}
|
/with(out)? oids/i
{
$return = { type => $item[1] =~ /out/i ? 'without_oids' : 'with_oids' }
}
ADD : /add/i
ALTER : /alter/i
CREATE : /create/i
ONLY : /only/i
DEFAULT : /default/i
DROP : /drop/i
COLUMN : /column/i
TABLE : /table/i
VIEW : /view/i
SCHEMA : /schema/i
SEMICOLON : /\s*;\n?/
SEQUENCE : /sequence/i
SELECT : /select/i
COPY : /copy/i
INTEGER : /\d+/
WORD : /\w+/
DIGITS : /\d+/
COMMA : ','
SET : /set/i
NAME : "`" /\w+/ "`"
{ $item[2] }
| /\w+/
{ $item[1] }
| /[\$\w]+/
{ $item[1] }
VALUE : /[-+]?\.?\d+(?:[eE]\d+)?/
{ $item[1] }
| /'.*?'/ # XXX doesn't handle embedded quotes
{ $item[1] }
| /null/i
{ 'NULL' }
!;
# -------------------------------------------------------------------
sub parse {
my ( $translator, $data ) = @_;
my $parser = Parse::RecDescent->new($GRAMMAR);
$::RD_TRACE = $translator->trace ? 1 : undef;
$DEBUG = $translator->debug;
unless (defined $parser) {
return $translator->error("Error instantiating Parse::RecDescent ".
"instance: Bad grammer");
}
my $result = $parser->startrule($data);
die "Parse failed.\n" unless defined $result;
warn Dumper($result) if $DEBUG;
my $schema = $translator->schema;
my @tables = sort {
( $result->{tables}{ $a }{'order'} || 0 ) <=> ( $result->{tables}{ $b }{'order'} || 0 )
} keys %{ $result->{tables} };
for my $table_name ( @tables ) {
my $tdata = $result->{tables}{ $table_name };
my $table = $schema->add_table(
#schema => $tdata->{'schema_name'},
name => $tdata->{'table_name'},
) or die "Couldn't create table '$table_name': " . $schema->error;
$table->extra(temporary => 1) if $tdata->{'temporary'};
$table->comments( $tdata->{'comments'} );
my @fields = sort {
$tdata->{'fields'}{ $a }{'order'}
<=>
$tdata->{'fields'}{ $b }{'order'}
} keys %{ $tdata->{'fields'} };
for my $fname ( @fields ) {
my $fdata = $tdata->{'fields'}{ $fname };
next if $fdata->{'drop'};
my $field = $table->add_field(
name => $fdata->{'name'},
data_type => $fdata->{'data_type'},
size => $fdata->{'size'},
default_value => $fdata->{'default'},
is_auto_increment => $fdata->{'is_auto_increment'},
is_nullable => $fdata->{'is_nullable'},
comments => $fdata->{'comments'},
) or die $table->error;
$table->primary_key( $field->name ) if $fdata->{'is_primary_key'};
for my $cdata ( @{ $fdata->{'constraints'} } ) {
next unless $cdata->{'type'} eq 'foreign_key';
$cdata->{'fields'} ||= [ $field->name ];
push @{ $tdata->{'constraints'} }, $cdata;
}
}
for my $idata ( @{ $tdata->{'indices'} || [] } ) {
my $index = $table->add_index(
name => $idata->{'name'},
type => uc $idata->{'type'},
fields => $idata->{'fields'},
) or die $table->error . ' ' . $table->name;
}
for my $cdata ( @{ $tdata->{'constraints'} || [] } ) {
my $constraint = $table->add_constraint(
name => $cdata->{'name'},
type => $cdata->{'type'},
fields => $cdata->{'fields'},
reference_table => $cdata->{'reference_table'},
reference_fields => $cdata->{'reference_fields'},
match_type => $cdata->{'match_type'} || '',
on_delete => $cdata->{'on_delete'} || $cdata->{'on_delete_do'},
on_update => $cdata->{'on_update'} || $cdata->{'on_update_do'},
expression => $cdata->{'expression'},
) or die "Can't add constraint of type '" .
$cdata->{'type'} . "' to table '" . $table->name .
"': " . $table->error;
}
}
for my $vinfo (@{$result->{views}}) {
my $sql = $vinfo->{sql};
$sql =~ s/\A\s+|\s+\z//g;
my $view = $schema->add_view (
name => $vinfo->{view_name},
sql => $sql,
fields => $vinfo->{fields},
);
$view->extra ( temporary => 1 ) if $vinfo->{is_temporary};
}
return 1;
}
1;
# -------------------------------------------------------------------
# Rescue the drowning and tie your shoestrings.
# Henry David Thoreau
# -------------------------------------------------------------------