Iteration 2 - DATA_ENGINEER
Sequence: 4
Timestamp: 2025-07-27 22:37:51

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 20 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": "concert_singer",
  "iteration": 1,
  "business_context": "A concert organizer aims to maximize attendance across multiple concerts by selecting optimal concert-stadium pairings, considering stadium capacities and ensuring each concert has at least one singer.",
  "optimization_problem_description": "Maximize total attendance by selecting concerts to hold at specific stadiums, subject to stadium capacity constraints and ensuring each concert has at least one singer.",
  "optimization_formulation": {
    "objective": "maximize total_attendance = \u2211(attendance_coefficient[concert_ID, stadium_ID] \u00d7 x[concert_ID, stadium_ID])",
    "decision_variables": "x[concert_ID, stadium_ID] = 1 if concert is held at stadium, 0 otherwise (binary)",
    "constraints": [
      "\u2211(x[concert_ID, stadium_ID]) \u2265 1 for each concert_ID",
      "\u2211(x[concert_ID, stadium_ID] \u00d7 attendance_coefficient[concert_ID, stadium_ID]) \u2264 stadium_capacity[stadium_ID] for each stadium_ID"
    ]
  },
  "current_optimization_to_schema_mapping": {
    "objective_coefficients": {
      "attendance_coefficient[concert_ID, stadium_ID]": {
        "currently_mapped_to": "attendance_coefficients.coefficient",
        "mapping_adequacy": "good",
        "description": "Expected attendance if the concert is held at the stadium"
      }
    },
    "constraint_bounds": {
      "stadium_capacity[stadium_ID]": {
        "currently_mapped_to": "missing",
        "mapping_adequacy": "missing",
        "description": "Maximum number of attendees a stadium can accommodate"
      }
    },
    "decision_variables": {
      "x[concert_ID, stadium_ID]": {
        "currently_mapped_to": "concert_stadium_mapping.concert_ID, concert_stadium_mapping.stadium_ID",
        "mapping_adequacy": "good",
        "description": "Binary variable indicating if a concert is held at a stadium",
        "variable_type": "binary"
      }
    }
  },
  "missing_optimization_requirements": [
    "stadium_capacity data for each stadium_ID"
  ],
  "iteration_status": {
    "complete": false,
    "confidence": "medium",
    "next_focus": "Incorporate stadium capacity data into the schema or configuration logic"
  }
}


CURRENT DATABASE SCHEMA:
```sql
-- Iteration 1 Database Schema
-- Objective: Schema adjustments made to address mapping gaps and missing data requirements identified by the OR expert, with updates to business configuration logic for parameters better suited outside of tables.

CREATE TABLE concert_stadium_mapping (
  concert_ID INTEGER,
  stadium_ID INTEGER
);

CREATE TABLE attendance_coefficients (
  concert_ID INTEGER,
  stadium_ID INTEGER,
  coefficient FLOAT
);


```


CURRENT DATA DICTIONARY:
{
  "tables": {
    "concert_stadium_mapping": {
      "business_purpose": "Maps concerts to specific stadiums for planning",
      "optimization_role": "business_data",
      "columns": {
        "concert_ID": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for each concert",
          "optimization_purpose": "Links concerts to stadiums",
          "sample_values": "1, 2, 3"
        },
        "stadium_ID": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for each stadium",
          "optimization_purpose": "Links stadiums to concerts",
          "sample_values": "101, 102, 103"
        }
      }
    },
    "attendance_coefficients": {
      "business_purpose": "Stores attendance coefficients for concert-stadium combinations",
      "optimization_role": "objective_coefficients",
      "columns": {
        "concert_ID": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for each concert",
          "optimization_purpose": "Part of composite key for attendance coefficients",
          "sample_values": "1, 2, 3"
        },
        "stadium_ID": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for each stadium",
          "optimization_purpose": "Part of composite key for attendance coefficients",
          "sample_values": "101, 102, 103"
        },
        "coefficient": {
          "data_type": "FLOAT",
          "business_meaning": "Expected attendance if the concert is held at the stadium",
          "optimization_purpose": "Objective coefficient in optimization model",
          "sample_values": "150.0, 200.0, 250.0"
        }
      }
    }
  }
}


CURRENT BUSINESS CONFIGURATION LOGIC:
{
  "default_attendance_coefficient": {
    "sample_value": "100",
    "data_type": "INTEGER",
    "business_meaning": "Default attendance coefficient when specific data is unavailable",
    "optimization_role": "Used as a fallback in optimization model",
    "configuration_type": "scalar_parameter"
  }
}


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

JSON STRUCTURE REQUIRED:

{
  "database_id": "concert_singer",
  "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": "concert_singer",
  "iteration": 2,
  "implementation_summary": "Incorporated stadium capacity data into the schema, addressed mapping gaps, and updated business configuration logic for scalar parameters and formulas.",
  "or_requirements_analysis": {
    "mapping_gaps_identified": [
      "Missing mapping for stadium_capacity[stadium_ID]"
    ],
    "missing_data_requirements": [
      "Stadium capacity data for each stadium_ID"
    ],
    "business_configuration_logic_needs": [
      "Default attendance coefficient as a scalar parameter"
    ]
  },
  "schema_adjustment_decisions": {
    "tables_to_delete": [],
    "tables_to_create": [
      {
        "table_name": "stadium_capacity",
        "purpose": "constraint_bounds",
        "business_meaning": "Stores maximum capacity for each stadium"
      }
    ],
    "tables_to_modify": []
  },
  "business_configuration_logic_updates": {
    "configuration_parameters": {
      "default_attendance_coefficient": {
        "sample_value": "100",
        "data_type": "INTEGER",
        "business_meaning": "Default attendance coefficient when specific data is unavailable",
        "optimization_role": "Used as a fallback in optimization model",
        "configuration_type": "scalar_parameter"
      }
    },
    "updates_rationale": "Scalar parameters like default attendance coefficients are better managed in configuration logic for flexibility and ease of updates."
  },
  "implemented_optimization_mapping": {
    "objective_coefficients_mapping": {
      "attendance_coefficient[concert_ID, stadium_ID]": "attendance_coefficients.coefficient"
    },
    "constraint_bounds_mapping": {
      "stadium_capacity[stadium_ID]": "stadium_capacity.capacity"
    },
    "decision_variables_mapping": {
      "x[concert_ID, stadium_ID]": "concert_stadium_mapping.concert_ID, concert_stadium_mapping.stadium_ID"
    }
  },
  "data_dictionary": {
    "tables": {
      "concert_stadium_mapping": {
        "business_purpose": "Maps concerts to specific stadiums for planning",
        "optimization_role": "business_data",
        "columns": {
          "concert_ID": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each concert",
            "optimization_purpose": "Links concerts to stadiums",
            "sample_values": "1, 2, 3"
          },
          "stadium_ID": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each stadium",
            "optimization_purpose": "Links stadiums to concerts",
            "sample_values": "101, 102, 103"
          }
        }
      },
      "attendance_coefficients": {
        "business_purpose": "Stores attendance coefficients for concert-stadium combinations",
        "optimization_role": "objective_coefficients",
        "columns": {
          "concert_ID": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each concert",
            "optimization_purpose": "Part of composite key for attendance coefficients",
            "sample_values": "1, 2, 3"
          },
          "stadium_ID": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each stadium",
            "optimization_purpose": "Part of composite key for attendance coefficients",
            "sample_values": "101, 102, 103"
          },
          "coefficient": {
            "data_type": "FLOAT",
            "business_meaning": "Expected attendance if the concert is held at the stadium",
            "optimization_purpose": "Objective coefficient in optimization model",
            "sample_values": "150.0, 200.0, 250.0"
          }
        }
      },
      "stadium_capacity": {
        "business_purpose": "Stores maximum capacity for each stadium",
        "optimization_role": "constraint_bounds",
        "columns": {
          "stadium_ID": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for each stadium",
            "optimization_purpose": "Links capacity to stadiums",
            "sample_values": "101, 102, 103"
          },
          "capacity": {
            "data_type": "INTEGER",
            "business_meaning": "Maximum number of attendees a stadium can accommodate",
            "optimization_purpose": "Constraint bound in optimization model",
            "sample_values": "5000, 10000, 15000"
          }
        }
      }
    }
  },
  "data_mapping": {
    "objective_sources": [
      "attendance_coefficients.coefficient"
    ],
    "constraint_sources": [
      "stadium_capacity.capacity"
    ],
    "sample_data_rows": {
      "concert_stadium_mapping": 3,
      "attendance_coefficients": 5,
      "stadium_capacity": 3
    }
  },
  "validation": {
    "schema_complete": true,
    "data_consistent": true,
    "math_traceable": true,
    "business_aligned": true,
    "follows_db_standards": true
  }
}
