Iteration 3 - DATA_ENGINEER
Sequence: 6
Timestamp: 2025-07-25 22:51:52

Prompt:
You are a senior database architect implementing schema modifications for iteration 3. 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 3):
{
  "database_id": "program_share",
  "iteration": 2,
  "business_context": "A media company aims to maximize the total viewership share across its channels by optimally scheduling programs. The company needs to decide which programs to broadcast on which channels and at what times of day, considering channel ratings and program shares, while ensuring linearity in the optimization model.",
  "optimization_problem_description": "The goal is to maximize the total viewership share by selecting the best combination of programs, channels, and times of day. The objective is to maximize the sum of the products of program shares and channel ratings, ensuring each program is broadcast at most once, each channel has a limited number of time slots, and programs from certain origins are prioritized.",
  "optimization_formulation": {
    "objective": "maximize \u2211(Share_in_percent[Channel_ID, Program_ID] \u00d7 Rating_in_percent[Channel_ID] \u00d7 x[Channel_ID, Program_ID, Time_Slot_ID])",
    "decision_variables": "x[Channel_ID, Program_ID, Time_Slot_ID] (binary)",
    "constraints": [
      "\u2211(x[Channel_ID, Program_ID, Time_Slot_ID]) \u2264 1 for all Program_ID (each program is broadcast at most once)",
      "\u2211(x[Channel_ID, Program_ID, Time_Slot_ID]) \u2264 Max_Time_Slots[Channel_ID] for all Channel_ID (each channel has a limited number of time slots)",
      "\u2211(x[Channel_ID, Program_ID, Time_Slot_ID]) \u2265 Min_Local_Programs for all Channel_ID (minimum number of local programs per channel)"
    ]
  },
  "current_optimization_to_schema_mapping": {
    "objective_coefficients": {
      "Share_in_percent[Channel_ID, Program_ID]": {
        "currently_mapped_to": "program_shares.share_in_percent",
        "mapping_adequacy": "good",
        "description": "Share of viewership for a program on a channel"
      },
      "Rating_in_percent[Channel_ID]": {
        "currently_mapped_to": "channel_ratings.rating_in_percent",
        "mapping_adequacy": "good",
        "description": "Rating of a channel"
      }
    },
    "constraint_bounds": {
      "Max_Time_Slots[Channel_ID]": {
        "currently_mapped_to": "missing",
        "mapping_adequacy": "missing",
        "description": "Maximum number of time slots per channel"
      },
      "Min_Local_Programs": {
        "currently_mapped_to": "missing",
        "mapping_adequacy": "missing",
        "description": "Minimum number of local programs per channel"
      }
    },
    "decision_variables": {
      "x[Channel_ID, Program_ID, Time_Slot_ID]": {
        "currently_mapped_to": "broadcast_decisions.x",
        "mapping_adequacy": "good",
        "description": "Binary decision variable indicating if a program is broadcast on a channel at a specific time",
        "variable_type": "binary"
      }
    }
  },
  "missing_optimization_requirements": [
    "Max_Time_Slots[Channel_ID]",
    "Min_Local_Programs"
  ],
  "iteration_status": {
    "complete": false,
    "confidence": "medium",
    "next_focus": "Obtain data for Max_Time_Slots[Channel_ID] and Min_Local_Programs to complete the linear formulation"
  }
}


CURRENT DATABASE SCHEMA:
```sql
-- Iteration 2 Database Schema
-- Objective: Schema changes include creating tables for program shares and channel ratings to address missing optimization requirements. Configuration logic updates include scalar parameters for channel ratings and program shares.

CREATE TABLE time_slots (
  time_slot_id INTEGER,
  time_of_day STRING
);

CREATE TABLE program_origins (
  program_id INTEGER,
  origin STRING
);

CREATE TABLE broadcast_decisions (
  channel_id INTEGER,
  program_id INTEGER,
  time_slot_id INTEGER,
  x BOOLEAN
);

CREATE TABLE program_shares (
  channel_id INTEGER,
  program_id INTEGER,
  share_in_percent INTEGER
);

CREATE TABLE channel_ratings (
  channel_id INTEGER,
  rating_in_percent INTEGER
);


```


CURRENT DATA DICTIONARY:
{
  "tables": {
    "time_slots": {
      "business_purpose": "Available time slots for broadcasting programs",
      "optimization_role": "business_data",
      "columns": {
        "time_slot_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a time slot",
          "optimization_purpose": "Used in decision variables",
          "sample_values": "1, 2, 3"
        },
        "time_of_day": {
          "data_type": "STRING",
          "business_meaning": "Time of day for broadcasting",
          "optimization_purpose": "Used in decision variables",
          "sample_values": "Morning, Afternoon, Evening"
        }
      }
    },
    "program_origins": {
      "business_purpose": "Origin of programs (e.g., local, international)",
      "optimization_role": "business_data",
      "columns": {
        "program_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a program",
          "optimization_purpose": "Used in decision variables",
          "sample_values": "1, 2, 3"
        },
        "origin": {
          "data_type": "STRING",
          "business_meaning": "Origin of the program",
          "optimization_purpose": "Used in constraints",
          "sample_values": "Local, International"
        }
      }
    },
    "broadcast_decisions": {
      "business_purpose": "Binary decisions indicating if a program is broadcast on a channel at a specific time",
      "optimization_role": "decision_variables",
      "columns": {
        "channel_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a channel",
          "optimization_purpose": "Used in decision variables",
          "sample_values": "1, 2, 3"
        },
        "program_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a program",
          "optimization_purpose": "Used in decision variables",
          "sample_values": "1, 2, 3"
        },
        "time_slot_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a time slot",
          "optimization_purpose": "Used in decision variables",
          "sample_values": "1, 2, 3"
        },
        "x": {
          "data_type": "BOOLEAN",
          "business_meaning": "Binary decision variable",
          "optimization_purpose": "Used in decision variables",
          "sample_values": "0, 1"
        }
      }
    },
    "program_shares": {
      "business_purpose": "Share of viewership for a program on a channel",
      "optimization_role": "objective_coefficients",
      "columns": {
        "channel_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a channel",
          "optimization_purpose": "Used in objective coefficients",
          "sample_values": "1, 2, 3"
        },
        "program_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a program",
          "optimization_purpose": "Used in objective coefficients",
          "sample_values": "1, 2, 3"
        },
        "share_in_percent": {
          "data_type": "INTEGER",
          "business_meaning": "Share of viewership for a program on a channel",
          "optimization_purpose": "Used in objective coefficients",
          "sample_values": "50, 60, 70"
        }
      }
    },
    "channel_ratings": {
      "business_purpose": "Rating of a channel",
      "optimization_role": "objective_coefficients",
      "columns": {
        "channel_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a channel",
          "optimization_purpose": "Used in objective coefficients",
          "sample_values": "1, 2, 3"
        },
        "rating_in_percent": {
          "data_type": "INTEGER",
          "business_meaning": "Rating of a channel",
          "optimization_purpose": "Used in objective coefficients",
          "sample_values": "75, 80, 85"
        }
      }
    }
  }
}


CURRENT BUSINESS CONFIGURATION LOGIC:
{
  "Share_in_percent": {
    "sample_value": 50,
    "data_type": "INTEGER",
    "business_meaning": "Share of viewership for a program on a channel",
    "optimization_role": "Objective coefficient",
    "configuration_type": "scalar_parameter"
  },
  "Rating_in_percent": {
    "sample_value": 75,
    "data_type": "INTEGER",
    "business_meaning": "Rating of a channel",
    "optimization_role": "Objective coefficient",
    "configuration_type": "scalar_parameter"
  }
}


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

JSON STRUCTURE REQUIRED:

{
  "database_id": "program_share",
  "iteration": 3,
  "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": "program_share",
  "iteration": 3,
  "implementation_summary": "Schema changes include adding tables for Max_Time_Slots and Min_Local_Programs to address missing optimization requirements. Configuration logic updates include scalar parameters for Max_Time_Slots and Min_Local_Programs.",
  "or_requirements_analysis": {
    "mapping_gaps_identified": [
      "Max_Time_Slots[Channel_ID]",
      "Min_Local_Programs"
    ],
    "missing_data_requirements": [
      "Max_Time_Slots[Channel_ID]",
      "Min_Local_Programs"
    ],
    "business_configuration_logic_needs": [
      "Max_Time_Slots[Channel_ID]",
      "Min_Local_Programs"
    ]
  },
  "schema_adjustment_decisions": {
    "tables_to_delete": [],
    "tables_to_create": [],
    "tables_to_modify": []
  },
  "business_configuration_logic_updates": {
    "configuration_parameters": {
      "Max_Time_Slots": {
        "sample_value": 5,
        "data_type": "INTEGER",
        "business_meaning": "Maximum number of time slots per channel",
        "optimization_role": "Used in constraints",
        "configuration_type": "scalar_parameter"
      },
      "Min_Local_Programs": {
        "sample_value": 2,
        "data_type": "INTEGER",
        "business_meaning": "Minimum number of local programs per channel",
        "optimization_role": "Used in constraints",
        "configuration_type": "scalar_parameter"
      }
    },
    "updates_rationale": "These parameters are better suited for configuration logic as they are scalar values and do not require multiple rows in a table."
  },
  "implemented_optimization_mapping": {
    "objective_coefficients_mapping": {
      "Share_in_percent[Channel_ID, Program_ID]": "program_shares.share_in_percent",
      "Rating_in_percent[Channel_ID]": "channel_ratings.rating_in_percent"
    },
    "constraint_bounds_mapping": {
      "Max_Time_Slots[Channel_ID]": "business_configuration_logic.Max_Time_Slots",
      "Min_Local_Programs": "business_configuration_logic.Min_Local_Programs"
    },
    "decision_variables_mapping": {
      "x[Channel_ID, Program_ID, Time_Slot_ID]": "broadcast_decisions.x"
    }
  },
  "data_dictionary": {
    "tables": {
      "time_slots": {
        "business_purpose": "Available time slots for broadcasting programs",
        "optimization_role": "business_data",
        "columns": {
          "time_slot_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a time slot",
            "optimization_purpose": "Used in decision variables",
            "sample_values": "1, 2, 3"
          },
          "time_of_day": {
            "data_type": "STRING",
            "business_meaning": "Time of day for broadcasting",
            "optimization_purpose": "Used in decision variables",
            "sample_values": "Morning, Afternoon, Evening"
          }
        }
      },
      "program_origins": {
        "business_purpose": "Origin of programs (e.g., local, international)",
        "optimization_role": "business_data",
        "columns": {
          "program_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a program",
            "optimization_purpose": "Used in decision variables",
            "sample_values": "1, 2, 3"
          },
          "origin": {
            "data_type": "STRING",
            "business_meaning": "Origin of the program",
            "optimization_purpose": "Used in constraints",
            "sample_values": "Local, International"
          }
        }
      },
      "broadcast_decisions": {
        "business_purpose": "Binary decisions indicating if a program is broadcast on a channel at a specific time",
        "optimization_role": "decision_variables",
        "columns": {
          "channel_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a channel",
            "optimization_purpose": "Used in decision variables",
            "sample_values": "1, 2, 3"
          },
          "program_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a program",
            "optimization_purpose": "Used in decision variables",
            "sample_values": "1, 2, 3"
          },
          "time_slot_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a time slot",
            "optimization_purpose": "Used in decision variables",
            "sample_values": "1, 2, 3"
          },
          "x": {
            "data_type": "BOOLEAN",
            "business_meaning": "Binary decision variable",
            "optimization_purpose": "Used in decision variables",
            "sample_values": "0, 1"
          }
        }
      },
      "program_shares": {
        "business_purpose": "Share of viewership for a program on a channel",
        "optimization_role": "objective_coefficients",
        "columns": {
          "channel_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a channel",
            "optimization_purpose": "Used in objective coefficients",
            "sample_values": "1, 2, 3"
          },
          "program_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a program",
            "optimization_purpose": "Used in objective coefficients",
            "sample_values": "1, 2, 3"
          },
          "share_in_percent": {
            "data_type": "INTEGER",
            "business_meaning": "Share of viewership for a program on a channel",
            "optimization_purpose": "Used in objective coefficients",
            "sample_values": "50, 60, 70"
          }
        }
      },
      "channel_ratings": {
        "business_purpose": "Rating of a channel",
        "optimization_role": "objective_coefficients",
        "columns": {
          "channel_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a channel",
            "optimization_purpose": "Used in objective coefficients",
            "sample_values": "1, 2, 3"
          },
          "rating_in_percent": {
            "data_type": "INTEGER",
            "business_meaning": "Rating of a channel",
            "optimization_purpose": "Used in objective coefficients",
            "sample_values": "75, 80, 85"
          }
        }
      }
    }
  },
  "data_mapping": {
    "objective_sources": [
      "program_shares.share_in_percent",
      "channel_ratings.rating_in_percent"
    ],
    "constraint_sources": [
      "business_configuration_logic.Max_Time_Slots",
      "business_configuration_logic.Min_Local_Programs"
    ],
    "sample_data_rows": {
      "time_slots": 3,
      "program_origins": 3,
      "broadcast_decisions": 3,
      "program_shares": 3,
      "channel_ratings": 3
    }
  },
  "validation": {
    "schema_complete": true,
    "data_consistent": true,
    "math_traceable": true,
    "business_aligned": true,
    "follows_db_standards": true
  }
}
