This now uses a URL_SAFE base64 encoding on bytes data_value

This is needed for table with composite primary key, so we can specify which foreign column is r...

Remove Url from data_type

Remove the alternate syntax for join type using caret for the arrow

Use into_sql_statement for high level AST statements

Implement get_page_size for Select

implement conversion of Json type

unify code to build filter for BulkUpdate and BulkDelete

Implement additional helper methods in Select AST

implement parsing of very simple date

add more tests

Add a plain data struct which holds only the table definition and the csv_rows