Module: DataMapper::Migrations::OracleAdapter
Defined Under Namespace
Modules: ClassMethods, SQL
Class Method Summary
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Instance Method Summary
collapse
Methods included from SQL
#create_sequence_statements, #delete_table_statement, #drop_sequence_statement, #reset_sequence_statement, #schema_name, #truncate_table_statement
#upgrade_model_storage
#add_column_statement, #alter_table_add_column_statement, #create_index_statement, #create_index_statements, #create_table_statement, #create_unique_index_statements, #indexes, #property_schema_hash, #property_schema_statement, #schema_name, #supports_drop_table_if_exists?, #supports_serial?, #unique_indexes
Class Method Details
.included(base) ⇒ Object
This method is part of a private API.
You should avoid using this method if possible, as it may be removed or be changed in the future.
Instance Method Details
#create_model_storage(model) ⇒ Object
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# File 'lib/dm-migrations/adapters/dm-oracle-adapter.rb', line 73
def create_model_storage(model)
name = self.name
properties = model.properties_with_subclasses(name)
table_name = model.storage_name(name)
truncate_or_delete = self.class.auto_migrate_with
table_is_truncated = truncate_or_delete && @truncated_tables && @truncated_tables[table_name]
return false if storage_exists?(table_name) && !table_is_truncated
return false if properties.empty?
with_connection do |connection|
if table_is_truncated && storage_has_all_fields?(table_name, properties)
@truncated_tables[table_name] = nil
else
if truncate_or_delete
destroy_model_storage(model, true)
end
statements = [ create_table_statement(connection, model, properties) ]
statements.concat(create_index_statements(model))
statements.concat(create_unique_index_statements(model))
statements.concat(create_sequence_statements(model))
statements.each do |statement|
command = connection.create_command(statement)
command.execute_non_query
end
end
end
true
end
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#destroy_model_storage(model, forced = false) ⇒ Object
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# File 'lib/dm-migrations/adapters/dm-oracle-adapter.rb', line 111
def destroy_model_storage(model, forced = false)
table_name = model.storage_name(name)
klass = self.class
truncate_or_delete = klass.auto_migrate_with
if storage_exists?(table_name)
if truncate_or_delete && !forced
case truncate_or_delete
when :truncate
execute(truncate_table_statement(model))
when :delete
execute(delete_table_statement(model))
else
raise ArgumentError, "Unsupported auto_migrate_with option"
end
@truncated_tables ||= {}
@truncated_tables[table_name] = true
else
execute(drop_table_statement(model))
@truncated_tables[table_name] = nil if @truncated_tables
end
end
reset_sequences = klass.auto_migrate_reset_sequences
table_is_truncated = @truncated_tables && @truncated_tables[table_name]
unless truncate_or_delete && !reset_sequences && !forced
if sequence_exists?(model_sequence_name(model))
statement = if table_is_truncated && !forced
reset_sequence_statement(model)
else
drop_sequence_statement(model)
end
execute(statement) if statement
end
end
true
end
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#drop_table_statement(model) ⇒ Object
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# File 'lib/dm-migrations/adapters/dm-oracle-adapter.rb', line 66
def drop_table_statement(model)
table_name = quote_name(model.storage_name(name))
"DROP TABLE #{table_name} CASCADE CONSTRAINTS"
end
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#field_exists?(storage_name, field_name) ⇒ Boolean
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# File 'lib/dm-migrations/adapters/dm-oracle-adapter.rb', line 42
def field_exists?(storage_name, field_name)
statement = DataMapper::Ext::String.compress_lines(<<-SQL)
SELECT COUNT(*)
FROM all_tab_columns
WHERE owner = ?
AND table_name = ?
AND column_name = ?
SQL
select(statement, schema_name, oracle_upcase(storage_name), oracle_upcase(field_name)).first > 0
end
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#sequence_exists?(sequence_name) ⇒ Boolean
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# File 'lib/dm-migrations/adapters/dm-oracle-adapter.rb', line 29
def sequence_exists?(sequence_name)
return false unless sequence_name
statement = DataMapper::Ext::String.compress_lines(<<-SQL)
SELECT COUNT(*)
FROM all_sequences
WHERE sequence_owner = ?
AND sequence_name = ?
SQL
select(statement, schema_name, oracle_upcase(sequence_name)).first > 0
end
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#storage_exists?(storage_name) ⇒ Boolean
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# File 'lib/dm-migrations/adapters/dm-oracle-adapter.rb', line 17
def storage_exists?(storage_name)
statement = DataMapper::Ext::String.compress_lines(<<-SQL)
SELECT COUNT(*)
FROM all_tables
WHERE owner = ?
AND table_name = ?
SQL
select(statement, schema_name, oracle_upcase(storage_name)).first > 0
end
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#storage_fields(storage_name) ⇒ Object
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# File 'lib/dm-migrations/adapters/dm-oracle-adapter.rb', line 55
def storage_fields(storage_name)
statement = DataMapper::Ext::String.compress_lines(<<-SQL)
SELECT column_name
FROM all_tab_columns
WHERE owner = ?
AND table_name = ?
SQL
select(statement, schema_name, oracle_upcase(storage_name))
end
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