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-# CRUD Technic Notes
-
-## Overview
-
-The ultimate CRUD scaffold finally comes.
-
-## Database Pipeline
-
-### Select
-
-1. Create select `what`, where clause, order clause, `Offset` and `Limit`.
-2. Check clauses' related columns are valid.
-3. Generate sql string and param list.
-4. Convert param list to `Dapper` dynamic params with proper type conversion in `IColumnTypeInfo`.
-5. Execute sql and get `dynamic`s.
-6. (Optional) Convert `dynamic`s to `TEntity`s.
-
-### Insert
-
-1. Create insert clause.
-2. Check clauses' related columns are valid.
-3. Create a real empty insert clause.
-4. For each column:
-    1. If insert item exists and value is not null but the column `IsGenerated` is true, throw exception.
-    2. If insert item does not exist or value is `null`, use default value generator to generate value. However, `DbNullValue` always means use `NULL` for that column.
-    3. If value is `null` and the column `IsAutoIncrement` is true, skip to next column.
-    4. Coerce null to `DbNullValue`.
-    5. Run validator to validate the value.
-    6. If value is `DbNullValue`, `IsNotNull` is true, throw exception.
-    7. Add column and value to real insert clause.
-5. Generate sql string and param list.
-6. Convert param list to `Dapper` dynamic params with proper type conversion in `IColumnTypeInfo`.
-7. Execute sql and return `KeyColumn` value.
-
-### Update
-
-1. Create update clause, where clause.
-2. Check clauses' related columns are valid. Then generate sql string and param list.
-3. Create a real empty update clause.
-4. For each column:
-    1. If update item exists and value is not null but the column `IsNoUpdate` is true, throw exception.
-    2. Invoke validator to validate the value.
-    3. If `IsNotNull` is true and value is `DbNullValue`, throw exception.
-    4. Add column and value to real update clause.
-5. Generate sql string and param list.
-6. Convert param list to `Dapper` dynamic params with proper type conversion in `IColumnTypeInfo`.
-7. Execute sql and return count of affected rows.