Iteration 2 - DATA_ENGINEER
Sequence: 4
Timestamp: 2025-07-25 22:35:27

Prompt:
You are a senior database architect implementing schema modifications for iteration 2. Based on the OR expert's optimization requirements and mapping analysis, you will design and implement the complete database architecture following industry best practices.

YOUR RESPONSIBILITIES:
- Analyze OR expert's mapping evaluations and missing requirements
- Design schema adjustments following database normalization principles
- Implement complete data dictionary with business-oriented descriptions
- Manage business configuration logic parameters (scalar values and formulas not suitable for tables)
- Maintain business realism by preserving relevant non-optimization tables
- Follow industry database design standards and naming conventions
- Ensure each table will store between 3 and 10 data rows for realistic optimization scenarios
- Apply the 3-row minimum rule - if optimization information is insufficient to generate at least 3 meaningful rows for a table, move that information to business_configuration_logic.json instead.


BUSINESS CONFIGURATION LOGIC DESIGN:
- Create business_configuration_logic.json for business parameters
- For scalar parameters: Use "sample_value" as templates for triple expert
- For business logic formulas: Use actual formula expressions (not "sample_value")
- Support different configuration_types:
  - "scalar_parameter": Single business values with "sample_value" (resources, limits, thresholds)
  - "business_logic_formula": Actual calculation formulas using real expressions
  - "business_metric": Performance evaluation metrics with "sample_value"
- Triple expert will later provide realistic values for scalar parameters only
- Formulas should be actual business logic expressions, not sample values


CRITICAL: Respond with ONLY a valid JSON object. No explanations, no markdown, no extra text.

OR EXPERT ANALYSIS (iteration 2):
{
  "database_id": "flight_company",
  "iteration": 1,
  "business_context": "Optimize flight scheduling to minimize fuel consumption while ensuring all flights are assigned to an airport and operated by a company, respecting operational constraints such as velocity, altitude, and capacity limits.",
  "optimization_problem_description": "Minimize total fuel consumption across all flights by optimizing the assignment of flights to airports and companies, subject to velocity, altitude, and capacity constraints.",
  "optimization_formulation": {
    "objective": "minimize \u2211(fuel_consumption_coefficient[flight_id] \u00d7 flight_assignment_variable[flight_id, airport_id, company_id])",
    "decision_variables": "flight_assignment_variable[flight_id, airport_id, company_id] \u2208 {0, 1} (binary variable indicating if flight is assigned to airport and company)",
    "constraints": [
      "\u2211(flight_assignment_variable[flight_id, airport_id, company_id]) = 1 \u2200 flight_id (each flight must be assigned to exactly one airport and company)",
      "\u2211(flight_assignment_variable[flight_id, airport_id, company_id]) \u2264 airport_capacity[airport_id] \u2200 airport_id (airport capacity constraint)",
      "\u2211(flight_assignment_variable[flight_id, airport_id, company_id]) \u2264 company_capacity[company_id] \u2200 company_id (company capacity constraint)",
      "velocity_min[flight_id] \u2264 velocity[flight_id] \u2264 velocity_max[flight_id] \u2200 flight_id (velocity constraints)",
      "altitude_min[flight_id] \u2264 altitude[flight_id] \u2264 altitude_max[flight_id] \u2200 flight_id (altitude constraints)"
    ]
  },
  "current_optimization_to_schema_mapping": {
    "objective_coefficients": {
      "fuel_consumption_coefficient[flight_id]": {
        "currently_mapped_to": "fuel_consumption_coefficients.coefficient",
        "mapping_adequacy": "good",
        "description": "Fuel consumption coefficient for each flight"
      }
    },
    "constraint_bounds": {
      "velocity_min[flight_id]": {
        "currently_mapped_to": "velocity_constraints.velocity_min",
        "mapping_adequacy": "good",
        "description": "Minimum velocity constraint for each flight"
      },
      "velocity_max[flight_id]": {
        "currently_mapped_to": "velocity_constraints.velocity_max",
        "mapping_adequacy": "good",
        "description": "Maximum velocity constraint for each flight"
      },
      "altitude_min[flight_id]": {
        "currently_mapped_to": "altitude_constraints.altitude_min",
        "mapping_adequacy": "good",
        "description": "Minimum altitude constraint for each flight"
      },
      "altitude_max[flight_id]": {
        "currently_mapped_to": "altitude_constraints.altitude_max",
        "mapping_adequacy": "good",
        "description": "Maximum altitude constraint for each flight"
      },
      "airport_capacity[airport_id]": {
        "currently_mapped_to": "airport_capacities.capacity",
        "mapping_adequacy": "good",
        "description": "Maximum number of flights an airport can handle"
      },
      "company_capacity[company_id]": {
        "currently_mapped_to": "company_capacities.capacity",
        "mapping_adequacy": "good",
        "description": "Maximum number of flights a company can handle"
      }
    },
    "decision_variables": {
      "flight_assignment_variable[flight_id, airport_id, company_id]": {
        "currently_mapped_to": "missing",
        "mapping_adequacy": "missing",
        "description": "Binary decision variable indicating if a flight is assigned to an airport and company",
        "variable_type": "binary"
      }
    }
  },
  "missing_optimization_requirements": [
    "flight_assignment_variable[flight_id, airport_id, company_id]"
  ],
  "iteration_status": {
    "complete": false,
    "confidence": "medium",
    "next_focus": "Define and map the flight assignment decision variable to ensure a complete linear formulation."
  }
}


CURRENT DATABASE SCHEMA:
```sql
-- Iteration 1 Database Schema
-- Objective: Schema changes include creating tables for fuel consumption coefficients, velocity and altitude constraints, and airport and company capacities. Configuration logic updates include scalar parameters for velocity and altitude constraints and formulas for fuel consumption calculations.

CREATE TABLE fuel_consumption_coefficients (
  flight_id INTEGER,
  coefficient FLOAT
);

CREATE TABLE velocity_constraints (
  flight_id INTEGER,
  velocity_min INTEGER,
  velocity_max INTEGER
);

CREATE TABLE altitude_constraints (
  flight_id INTEGER,
  altitude_min INTEGER,
  altitude_max INTEGER
);

CREATE TABLE airport_capacities (
  airport_id INTEGER,
  capacity INTEGER
);

CREATE TABLE company_capacities (
  company_id INTEGER,
  capacity INTEGER
);


```


CURRENT DATA DICTIONARY:
{
  "tables": {
    "fuel_consumption_coefficients": {
      "business_purpose": "Fuel consumption coefficients for each flight",
      "optimization_role": "objective_coefficients",
      "columns": {
        "flight_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for each flight",
          "optimization_purpose": "Index for fuel consumption coefficient",
          "sample_values": "1, 2, 3"
        },
        "coefficient": {
          "data_type": "FLOAT",
          "business_meaning": "Fuel consumption coefficient for the flight",
          "optimization_purpose": "Used in objective function",
          "sample_values": "0.5, 0.6, 0.7"
        }
      }
    },
    "velocity_constraints": {
      "business_purpose": "Minimum and maximum velocity constraints for each flight",
      "optimization_role": "constraint_bounds",
      "columns": {
        "flight_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for each flight",
          "optimization_purpose": "Index for velocity constraints",
          "sample_values": "1, 2, 3"
        },
        "velocity_min": {
          "data_type": "INTEGER",
          "business_meaning": "Minimum velocity constraint for the flight",
          "optimization_purpose": "Used in velocity constraint",
          "sample_values": "500, 550, 600"
        },
        "velocity_max": {
          "data_type": "INTEGER",
          "business_meaning": "Maximum velocity constraint for the flight",
          "optimization_purpose": "Used in velocity constraint",
          "sample_values": "900, 950, 1000"
        }
      }
    },
    "altitude_constraints": {
      "business_purpose": "Minimum and maximum altitude constraints for each flight",
      "optimization_role": "constraint_bounds",
      "columns": {
        "flight_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for each flight",
          "optimization_purpose": "Index for altitude constraints",
          "sample_values": "1, 2, 3"
        },
        "altitude_min": {
          "data_type": "INTEGER",
          "business_meaning": "Minimum altitude constraint for the flight",
          "optimization_purpose": "Used in altitude constraint",
          "sample_values": "30000, 31000, 32000"
        },
        "altitude_max": {
          "data_type": "INTEGER",
          "business_meaning": "Maximum altitude constraint for the flight",
          "optimization_purpose": "Used in altitude constraint",
          "sample_values": "40000, 41000, 42000"
        }
      }
    },
    "airport_capacities": {
      "business_purpose": "Capacity constraints for each airport",
      "optimization_role": "constraint_bounds",
      "columns": {
        "airport_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for each airport",
          "optimization_purpose": "Index for airport capacity",
          "sample_values": "1, 2, 3"
        },
        "capacity": {
          "data_type": "INTEGER",
          "business_meaning": "Maximum number of flights the airport can handle",
          "optimization_purpose": "Used in airport capacity constraint",
          "sample_values": "10, 15, 20"
        }
      }
    },
    "company_capacities": {
      "business_purpose": "Capacity constraints for each company",
      "optimization_role": "constraint_bounds",
      "columns": {
        "company_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for each company",
          "optimization_purpose": "Index for company capacity",
          "sample_values": "1, 2, 3"
        },
        "capacity": {
          "data_type": "INTEGER",
          "business_meaning": "Maximum number of flights the company can handle",
          "optimization_purpose": "Used in company capacity constraint",
          "sample_values": "5, 10, 15"
        }
      }
    }
  }
}


CURRENT BUSINESS CONFIGURATION LOGIC:
{
  "velocity_min": {
    "sample_value": 500,
    "data_type": "INTEGER",
    "business_meaning": "Minimum velocity constraint for each flight",
    "optimization_role": "Used in velocity constraint",
    "configuration_type": "scalar_parameter"
  },
  "velocity_max": {
    "sample_value": 900,
    "data_type": "INTEGER",
    "business_meaning": "Maximum velocity constraint for each flight",
    "optimization_role": "Used in velocity constraint",
    "configuration_type": "scalar_parameter"
  },
  "altitude_min": {
    "sample_value": 30000,
    "data_type": "INTEGER",
    "business_meaning": "Minimum altitude constraint for each flight",
    "optimization_role": "Used in altitude constraint",
    "configuration_type": "scalar_parameter"
  },
  "altitude_max": {
    "sample_value": 40000,
    "data_type": "INTEGER",
    "business_meaning": "Maximum altitude constraint for each flight",
    "optimization_role": "Used in altitude constraint",
    "configuration_type": "scalar_parameter"
  },
  "fuel_consumption_formula": {
    "formula_expression": "fuel_consumption_coefficient * distance",
    "data_type": "STRING",
    "business_meaning": "Fuel consumption calculation for each flight",
    "optimization_role": "Used in objective function",
    "configuration_type": "business_logic_formula"
  }
}


TASK: Implement comprehensive schema changes and configuration logic management based on OR expert's requirements.

JSON STRUCTURE REQUIRED:

{
  "database_id": "flight_company",
  "iteration": 2,
  "implementation_summary": "Summary of schema changes and configuration logic updates based on OR expert mapping analysis",
  
  "or_requirements_analysis": {
    "mapping_gaps_identified": [
      "List specific gaps identified from OR expert's mapping_adequacy assessments"
    ],
    "missing_data_requirements": [
      "List missing optimization data requirements from OR expert"
    ],
    "business_configuration_logic_needs": [
      "Scalar parameters and formulas better suited for configuration than tables"
    ]
  },
  
  "schema_adjustment_decisions": {
    "tables_to_delete": [
      {
        "table_name": "table_name",
        "reason": "business justification for removal (optimization irrelevant vs business irrelevant)"
      }
    ],
    "tables_to_create": [
      {
        "table_name": "table_name", 
        "purpose": "optimization role (decision_variables/objective_coefficients/constraint_bounds/business_data)",
        "business_meaning": "what this table represents in business context"
      }
    ],
    "tables_to_modify": [
      {
        "table_name": "existing_table",
        "changes": "specific modifications needed",
        "reason": "why these changes address OR expert's mapping gaps"
      }
    ]
  },
  
  "business_configuration_logic_updates": {
    "configuration_parameters": {
      "parameter_name": {
        "sample_value": "sample_parameter_value",
        "data_type": "INTEGER/FLOAT/STRING/BOOLEAN",
        "business_meaning": "what this parameter represents in business context",
        "optimization_role": "how this parameter is used in optimization model",
        "configuration_type": "scalar_parameter"
      },
      "formula_name": {
        "formula_expression": "actual_business_formula_expression",
        "data_type": "STRING",
        "business_meaning": "what this formula represents in business context",
        "optimization_role": "how this formula is used in optimization model",
        "configuration_type": "business_logic_formula"
      }
    },
    "updates_rationale": "why these parameters are better in configuration logic than tables"
  },
  
  "implemented_optimization_mapping": {
    "objective_coefficients_mapping": {
      "coefficient_name[indices]": "table.column OR business_configuration_logic.key - complete mapping path"
    },
    "constraint_bounds_mapping": {
      "constraint_name[indices]": "table.column OR business_configuration_logic.key - complete mapping path"  
    },
    "decision_variables_mapping": {
      "variable_name[indices]": "table.column OR business_configuration_logic.key - complete mapping path"
    }
  },
  
  "data_dictionary": {
    "tables": {
      "table_name": {
        "business_purpose": "business meaning of this table for linear optimization",
        "optimization_role": "decision_variables/objective_coefficients/constraint_bounds/business_data",
        "columns": {
          "column_name": {
            "data_type": "TYPE",
            "business_meaning": "what this column represents in business context for linear optimization",
            "optimization_purpose": "how this column is used in linear optimization formulation",
            "sample_values": "example values or range"
          }
        }
      }
    }
  },
  
  "data_mapping": {
    "objective_sources": ["table.column pairs for linear objective function"],
    "constraint_sources": ["table.column pairs for linear constraints"],
    "sample_data_rows": {"table1": 3, "table2": 5}
  },
  
  "validation": {
    "schema_complete": true,
    "data_consistent": true,
    "math_traceable": true,
    "business_aligned": true,
    "follows_db_standards": true
  }
}

Response:
{
  "database_id": "flight_company",
  "iteration": 2,
  "implementation_summary": "Schema changes include creating a table for flight assignments to address the missing decision variable. Configuration logic updates include scalar parameters for velocity and altitude constraints and formulas for fuel consumption calculations.",
  "or_requirements_analysis": {
    "mapping_gaps_identified": [
      "flight_assignment_variable[flight_id, airport_id, company_id] is missing in the schema"
    ],
    "missing_data_requirements": [
      "flight_assignment_variable[flight_id, airport_id, company_id]"
    ],
    "business_configuration_logic_needs": [
      "velocity_min, velocity_max, altitude_min, altitude_max, fuel_consumption_formula"
    ]
  },
  "schema_adjustment_decisions": {
    "tables_to_delete": [],
    "tables_to_create": [
      {
        "table_name": "flight_assignments",
        "purpose": "decision_variables",
        "business_meaning": "Binary decision variable indicating if a flight is assigned to an airport and company"
      }
    ],
    "tables_to_modify": []
  },
  "business_configuration_logic_updates": {
    "configuration_parameters": {
      "velocity_min": {
        "sample_value": 500,
        "data_type": "INTEGER",
        "business_meaning": "Minimum velocity constraint for each flight",
        "optimization_role": "Used in velocity constraint",
        "configuration_type": "scalar_parameter"
      },
      "velocity_max": {
        "sample_value": 900,
        "data_type": "INTEGER",
        "business_meaning": "Maximum velocity constraint for each flight",
        "optimization_role": "Used in velocity constraint",
        "configuration_type": "scalar_parameter"
      },
      "altitude_min": {
        "sample_value": 30000,
        "data_type": "INTEGER",
        "business_meaning": "Minimum altitude constraint for each flight",
        "optimization_role": "Used in altitude constraint",
        "configuration_type": "scalar_parameter"
      },
      "altitude_max": {
        "sample_value": 40000,
        "data_type": "INTEGER",
        "business_meaning": "Maximum altitude constraint for each flight",
        "optimization_role": "Used in altitude constraint",
        "configuration_type": "scalar_parameter"
      },
      "fuel_consumption_formula": {
        "formula_expression": "fuel_consumption_coefficient * distance",
        "data_type": "STRING",
        "business_meaning": "Fuel consumption calculation for each flight",
        "optimization_role": "Used in objective function",
        "configuration_type": "business_logic_formula"
      }
    },
    "updates_rationale": "These parameters are better suited for configuration logic as they are scalar values or formulas that do not require table storage."
  },
  "implemented_optimization_mapping": {
    "objective_coefficients_mapping": {
      "fuel_consumption_coefficient[flight_id]": "fuel_consumption_coefficients.coefficient"
    },
    "constraint_bounds_mapping": {
      "velocity_min[flight_id]": "velocity_constraints.velocity_min",
      "velocity_max[flight_id]": "velocity_constraints.velocity_max",
      "altitude_min[flight_id]": "altitude_constraints.altitude_min",
      "altitude_max[flight_id]": "altitude_constraints.altitude_max",
      "airport_capacity[airport_id]": "airport_capacities.capacity",
      "company_capacity[company_id]": "company_capacities.capacity"
    },
    "decision_variables_mapping": {
      "flight_assignment_variable[flight_id, airport_id, company_id]": "flight_assignments.assignment"
    }
  },
  "data_dictionary": {
    "tables": {
      "fuel_consumption_coefficients": {
        "business_purpose": "Fuel consumption coefficients for each flight",
        "optimization_role": "objective_coefficients",
        "columns": {
          "flight_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each flight",
            "optimization_purpose": "Index for fuel consumption coefficient",
            "sample_values": "1, 2, 3"
          },
          "coefficient": {
            "data_type": "FLOAT",
            "business_meaning": "Fuel consumption coefficient for the flight",
            "optimization_purpose": "Used in objective function",
            "sample_values": "0.5, 0.6, 0.7"
          }
        }
      },
      "velocity_constraints": {
        "business_purpose": "Minimum and maximum velocity constraints for each flight",
        "optimization_role": "constraint_bounds",
        "columns": {
          "flight_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each flight",
            "optimization_purpose": "Index for velocity constraints",
            "sample_values": "1, 2, 3"
          },
          "velocity_min": {
            "data_type": "INTEGER",
            "business_meaning": "Minimum velocity constraint for the flight",
            "optimization_purpose": "Used in velocity constraint",
            "sample_values": "500, 550, 600"
          },
          "velocity_max": {
            "data_type": "INTEGER",
            "business_meaning": "Maximum velocity constraint for the flight",
            "optimization_purpose": "Used in velocity constraint",
            "sample_values": "900, 950, 1000"
          }
        }
      },
      "altitude_constraints": {
        "business_purpose": "Minimum and maximum altitude constraints for each flight",
        "optimization_role": "constraint_bounds",
        "columns": {
          "flight_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each flight",
            "optimization_purpose": "Index for altitude constraints",
            "sample_values": "1, 2, 3"
          },
          "altitude_min": {
            "data_type": "INTEGER",
            "business_meaning": "Minimum altitude constraint for the flight",
            "optimization_purpose": "Used in altitude constraint",
            "sample_values": "30000, 31000, 32000"
          },
          "altitude_max": {
            "data_type": "INTEGER",
            "business_meaning": "Maximum altitude constraint for the flight",
            "optimization_purpose": "Used in altitude constraint",
            "sample_values": "40000, 41000, 42000"
          }
        }
      },
      "airport_capacities": {
        "business_purpose": "Capacity constraints for each airport",
        "optimization_role": "constraint_bounds",
        "columns": {
          "airport_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each airport",
            "optimization_purpose": "Index for airport capacity",
            "sample_values": "1, 2, 3"
          },
          "capacity": {
            "data_type": "INTEGER",
            "business_meaning": "Maximum number of flights the airport can handle",
            "optimization_purpose": "Used in airport capacity constraint",
            "sample_values": "10, 15, 20"
          }
        }
      },
      "company_capacities": {
        "business_purpose": "Capacity constraints for each company",
        "optimization_role": "constraint_bounds",
        "columns": {
          "company_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each company",
            "optimization_purpose": "Index for company capacity",
            "sample_values": "1, 2, 3"
          },
          "capacity": {
            "data_type": "INTEGER",
            "business_meaning": "Maximum number of flights the company can handle",
            "optimization_purpose": "Used in company capacity constraint",
            "sample_values": "5, 10, 15"
          }
        }
      },
      "flight_assignments": {
        "business_purpose": "Binary decision variable indicating if a flight is assigned to an airport and company",
        "optimization_role": "decision_variables",
        "columns": {
          "flight_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each flight",
            "optimization_purpose": "Index for flight assignment",
            "sample_values": "1, 2, 3"
          },
          "airport_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each airport",
            "optimization_purpose": "Index for flight assignment",
            "sample_values": "1, 2, 3"
          },
          "company_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each company",
            "optimization_purpose": "Index for flight assignment",
            "sample_values": "1, 2, 3"
          },
          "assignment": {
            "data_type": "BOOLEAN",
            "business_meaning": "Binary variable indicating if flight is assigned to airport and company",
            "optimization_purpose": "Used in decision variable",
            "sample_values": "true, false"
          }
        }
      }
    }
  },
  "data_mapping": {
    "objective_sources": [
      "fuel_consumption_coefficients.coefficient"
    ],
    "constraint_sources": [
      "velocity_constraints.velocity_min",
      "velocity_constraints.velocity_max",
      "altitude_constraints.altitude_min",
      "altitude_constraints.altitude_max",
      "airport_capacities.capacity",
      "company_capacities.capacity"
    ],
    "sample_data_rows": {
      "fuel_consumption_coefficients": 3,
      "velocity_constraints": 3,
      "altitude_constraints": 3,
      "airport_capacities": 3,
      "company_capacities": 3,
      "flight_assignments": 3
    }
  },
  "validation": {
    "schema_complete": true,
    "data_consistent": true,
    "math_traceable": true,
    "business_aligned": true,
    "follows_db_standards": true
  }
}
