clear_primary_key(*tables)
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def clear_primary_key(*tables)
tables.each{|t| @primary_keys.delete(dataset.send(:input_identifier, t))}
end
create_trigger(*args)
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def create_trigger(*args)
self << create_trigger_sql(*args)
end
database_type()
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def database_type
:firebird
end
drop_sequence(name)
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def drop_sequence(name)
self << drop_sequence_sql(name)
end
primary_key(table)
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Return primary key for the given table.
def primary_key(table)
t = dataset.send(:input_identifier, table)
@primary_keys.fetch(t) do
pk = fetch("SELECT RDB$FIELD_NAME FROM RDB$INDEX_SEGMENTS NATURAL JOIN RDB$RELATION_CONSTRAINTS WHERE RDB$CONSTRAINT_TYPE = 'PRIMARY KEY' AND RDB$RELATION_NAME = ?", t).single_value
@primary_keys[t] = dataset.send(:output_identifier, pk.rstrip) if pk
end
end
restart_sequence(*args)
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def restart_sequence(*args)
self << restart_sequence_sql(*args)
end
sequences(opts=OPTS) { |ds| ... }
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def sequences(opts=OPTS)
ds = self[:"rdb$generators"].server(opts[:server]).filter(:"rdb$system_flag" => 0).select(:"rdb$generator_name")
block_given? ? yield(ds) : ds.map{|r| ds.send(:output_identifier, r[:"rdb$generator_name"])}
end
tables(opts=OPTS)
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def tables(opts=OPTS)
tables_or_views(0, opts)
end
views(opts=OPTS)
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def views(opts=OPTS)
tables_or_views(1, opts)
end
alter_table_sql(table, op)
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Use Firebird specific syntax for add column
Calls superclass method
def alter_table_sql(table, op)
case op[:op]
when :add_column
"ALTER TABLE #{quote_schema_table(table)} ADD #{column_definition_sql(op)}"
when :drop_column
"ALTER TABLE #{quote_schema_table(table)} DROP #{column_definition_sql(op)}"
when :rename_column
"ALTER TABLE #{quote_schema_table(table)} ALTER #{quote_identifier(op[:name])} TO #{quote_identifier(op[:new_name])}"
when :set_column_type
"ALTER TABLE #{quote_schema_table(table)} ALTER #{quote_identifier(op[:name])} TYPE #{type_literal(op)}"
else
super(table, op)
end
end
auto_increment_sql()
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def auto_increment_sql()
AUTO_INCREMENT
end
create_sequence_sql(name, opts=OPTS)
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def create_sequence_sql(name, opts=OPTS)
"CREATE SEQUENCE #{quote_identifier(name)}"
end
create_table_from_generator(name, generator, options)
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Firebird gets an override because of the
mess of creating a sequence and trigger for auto-incrementing primary keys.
def create_table_from_generator(name, generator, options)
drop_statement, create_statements = create_table_sql_list(name, generator, options)
(execute_ddl(drop_statement) rescue nil) if drop_statement
create_statements.each{|sql| execute_ddl(sql)}
end
create_table_sql_list(name, generator, options=OPTS)
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def create_table_sql_list(name, generator, options=OPTS)
statements = [create_table_sql(name, generator, options)]
drop_seq_statement = nil
generator.columns.each do |c|
if c[:auto_increment]
c[:sequence_name] ||= "seq_#{name}_#{c[:name]}"
unless c[:create_sequence] == false
drop_seq_statement = drop_sequence_sql(c[:sequence_name])
statements << create_sequence_sql(c[:sequence_name])
statements << restart_sequence_sql(c[:sequence_name], {:restart_position => c[:sequence_start_position]}) if c[:sequence_start_position]
end
unless c[:create_trigger] == false
c[:trigger_name] ||= "BI_#{name}_#{c[:name]}"
c[:quoted_name] = quote_identifier(c[:name])
trigger_definition = <<-END
begin
if ((new.#{c[:quoted_name]} is null) or (new.#{c[:quoted_name]} = 0)) then
begin
new.#{c[:quoted_name]} = next value for #{c[:sequence_name]};
end
end
END
statements << create_trigger_sql(name, c[:trigger_name], trigger_definition, {:events => [:insert]})
end
end
end
[drop_seq_statement, statements]
end
create_trigger_sql(table, name, definition, opts=OPTS)
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def create_trigger_sql(table, name, definition, opts=OPTS)
events = opts[:events] ? Array(opts[:events]) : [:insert, :update, :delete]
whence = opts[:after] ? 'AFTER' : 'BEFORE'
inactive = opts[:inactive] ? 'INACTIVE' : 'ACTIVE'
position = opts.fetch(:position, 0)
sql = <<-end_sql
CREATE TRIGGER #{quote_identifier(name)} for #{quote_identifier(table)}
#{inactive} #{whence} #{events.map{|e| e.to_s.upcase}.join(' OR ')} position #{position}
as #{definition}
end_sql
sql
end
drop_sequence_sql(name)
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def drop_sequence_sql(name)
"DROP SEQUENCE #{quote_identifier(name)}"
end
remove_cached_schema(table)
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Calls superclass method
def remove_cached_schema(table)
clear_primary_key(table)
super
end
restart_sequence_sql(name, opts=OPTS)
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def restart_sequence_sql(name, opts=OPTS)
seq_name = quote_identifier(name)
"ALTER SEQUENCE #{seq_name} RESTART WITH #{opts[:restart_position]}"
end
tables_or_views(type, opts)
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def tables_or_views(type, opts)
ds = self[:"rdb$relations"].server(opts[:server]).filter(:"rdb$relation_type" => type, Sequel::SQL::Function.new(:COALESCE, :"rdb$system_flag", 0) => 0).select(:"rdb$relation_name")
ds.map{|r| ds.send(:output_identifier, r[:"rdb$relation_name"].rstrip)}
end
type_literal_generic_string(column)
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Calls superclass method
def type_literal_generic_string(column)
column[:text] ? :"BLOB SUB_TYPE TEXT" : super
end