Methods
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Instance Public methods
begin_db_transaction()
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Begins a transaction.
begin_isolated_db_transaction(isolation)
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commit_db_transaction()
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Commits a transaction.
create()
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create_savepoint()
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exec_delete(sql, name = 'SQL', binds = [])
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Also aliased as: exec_update
# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 155 def exec_delete(sql, name = 'SQL', binds = []) log(sql, name, binds) do result = without_prepared_statement?(binds) ? exec_no_cache(sql, binds) : exec_cache(sql, binds) affected = result.cmd_tuples result.clear affected end end
exec_insert(sql, name, binds, pk = nil, sequence_name = nil)
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# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 180 def exec_insert(sql, name, binds, pk = nil, sequence_name = nil) val = exec_query(sql, name, binds) if !use_insert_returning? && pk unless sequence_name table_ref = extract_table_ref_from_insert_sql(sql) sequence_name = default_sequence_name(table_ref, pk) return val unless sequence_name end last_insert_id_result(sequence_name) else val end end
exec_query(sql, name = 'SQL', binds = [])
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# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 136 def exec_query(sql, name = 'SQL', binds = []) log(sql, name, binds) do result = without_prepared_statement?(binds) ? exec_no_cache(sql, binds) : exec_cache(sql, binds) types = {} fields = result.fields fields.each_with_index do |fname, i| ftype = result.ftype i fmod = result.fmod i types[fname] = get_oid_type(ftype, fmod, fname) end ret = ActiveRecord::Result.new(fields, result.values, types) result.clear return ret end end
execute(sql, name = nil)
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Executes an SQL statement, returning a PGresult object on success or raising a PGError exception otherwise.
explain(arel, binds = [])
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insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil)
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Executes an INSERT query and returns the new record's ID
# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 54 def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil) unless pk # Extract the table from the insert sql. Yuck. table_ref = extract_table_ref_from_insert_sql(sql) pk = primary_key(table_ref) if table_ref end if pk && use_insert_returning? select_value("#{sql} RETURNING #{quote_column_name(pk)}") elsif pk super last_insert_id_value(sequence_name || default_sequence_name(table_ref, pk)) else super end end
outside_transaction?()
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# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 219 def outside_transaction? message = "#outside_transaction? is deprecated. This method was only really used " "internally, but you can use #transaction_open? instead." ActiveSupport::Deprecation.warn message @connection.transaction_status == PGconn::PQTRANS_IDLE end
release_savepoint()
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rollback_db_transaction()
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Aborts a transaction.
rollback_to_savepoint()
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select_rows(sql, name = nil, binds = [])
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Executes a SELECT query and returns an array of rows. Each row is an array of field values.
sql_for_insert(sql, pk, id_value, sequence_name, binds)
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# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 166 def sql_for_insert(sql, pk, id_value, sequence_name, binds) unless pk # Extract the table from the insert sql. Yuck. table_ref = extract_table_ref_from_insert_sql(sql) pk = primary_key(table_ref) if table_ref end if pk && use_insert_returning? sql = "#{sql} RETURNING #{quote_column_name(pk)}" end [sql, binds] end
substitute_at(column, index)
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