System and method for searching data

A method for searching data, the method implemented by way of a computing terminal, the method comprising:

• checking whether or not a search target data table is a table for which a parallel scan is possible and which does not include an inner table of a nested loop join type and includes time series data and generating a query execution plan;
• executing a parallel scan if the generated query execution plan is a plan using a parallel scan and if a number of records forming the search target table is greater than or equal to a preset value;
• dividing identifiers of the records (RID) into one or more RID ranges and generating parallel scan threads, a number of the parallel scan threads corresponding to a number of the divided RID ranges, the record identifiers evenly allotted in number to the respective RID ranges;
• obtaining record information without repetition according to bitmap values of each of the RID ranges having a same key value, by way of bitmap indexes formed of bit values for the RID included in each of the RID ranges;
• and
• reading records included in each of the RID ranges based on the obtained record information and transferring the records to a particular execution module.