php - To clean/fill table after table in the correct order, can I simply sort all tables based on FKs? -

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this more conceptual question.

i have scheduled task many input tables (sqlite) table1 ... tablen , need perform series of delete/insert mysql, processing table after table. 

read sqlite table -> empty mysql table -> fill mysql table

of course if (mysql) table1 has foreign key poiting table2, table2 should deleted , filled before table1. manually sort incoming tables, it's not idea 30+ table , can lead errors.

set foreign_key_checks = 0 not option.

so problem sorting mysql table based on number of incoming fks (high low), like:

// doctrine dbal example it's understandable $schema = $this->connection->getschemamanager();  // init chart keys table names, values # of incoming fks $chart = array_fill_keys($schema->listtablenames(), 0);  // build chart foreach ($schema->listtables() $table) {     foreach ($table->getforeignkeys() $foreignkey) {         $chart[$foreignkey->getforeigntablename()]++;     } }  // sort high low values arsort($chart);

are there flaws in reasoning? question how deal self-foreign keys (simply ignore it?) , how deal circular references (i.e. table1 -> table2 -> table3 -> table1).


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