Iteration 2 - DATA_ENGINEER
Sequence: 4
Timestamp: 2025-07-25 22:46:15

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": "wta_1",
  "iteration": 1,
  "business_context": "Optimizing player scheduling to maximize total ranking points earned across tournaments while respecting player availability, tournament participation limits, and ranking points allocation.",
  "optimization_problem_description": "Maximize the total ranking points earned by players across different tournaments, considering constraints such as player availability, tournament participation limits, and ranking points allocation.",
  "optimization_formulation": {
    "objective": "maximize \u2211(ranking_points[i] * x[i]) where x[i] is a binary decision variable indicating whether player i participates in a tournament.",
    "decision_variables": "x[i] \u2208 {0, 1} (binary decision variable indicating whether player i participates in a tournament)",
    "constraints": [
      "\u2211(x[i]) \u2264 max_tournaments_per_player for each player i (player participation limit)",
      "\u2211(x[i]) \u2264 max_players_per_tournament for each tournament (tournament capacity limit)",
      "x[i] \u2264 availability[i] for each player i (player availability constraint)",
      "\u2211(ranking_points[i] * x[i]) \u2264 max_total_ranking_points (total ranking points limit)"
    ]
  },
  "current_optimization_to_schema_mapping": {
    "objective_coefficients": {
      "ranking_points[i]": {
        "currently_mapped_to": "missing",
        "mapping_adequacy": "missing",
        "description": "Ranking points earned by player i in a tournament."
      }
    },
    "constraint_bounds": {
      "max_tournaments_per_player": {
        "currently_mapped_to": "business_configuration_logic.max_tournaments_per_player",
        "mapping_adequacy": "good",
        "description": "Maximum number of tournaments a player can participate in."
      },
      "max_players_per_tournament": {
        "currently_mapped_to": "matches.max_players_per_tournament",
        "mapping_adequacy": "good",
        "description": "Maximum number of players allowed in a tournament."
      },
      "availability[i]": {
        "currently_mapped_to": "player_availability.availability",
        "mapping_adequacy": "good",
        "description": "Availability of player i to participate in tournaments."
      },
      "max_total_ranking_points": {
        "currently_mapped_to": "business_configuration_logic.max_total_ranking_points",
        "mapping_adequacy": "good",
        "description": "Maximum total ranking points that can be earned in a tournament."
      }
    },
    "decision_variables": {
      "x[i]": {
        "currently_mapped_to": "player_tournament_participation.participation",
        "mapping_adequacy": "good",
        "description": "Binary decision variable indicating whether player i participates in a tournament.",
        "variable_type": "binary"
      }
    }
  },
  "missing_optimization_requirements": [
    "ranking_points[i] (ranking points earned by player i in a tournament)"
  ],
  "iteration_status": {
    "complete": false,
    "confidence": "medium",
    "next_focus": "Identify data source for ranking_points[i] to complete the linear formulation."
  }
}


CURRENT DATABASE SCHEMA:
```sql
-- Iteration 1 Database Schema
-- Objective: Schema changes include creating new tables for missing optimization requirements, modifying existing tables to better align with OR expert's mapping, and adding business configuration logic for scalar parameters and formulas.

CREATE TABLE player_availability (
  player_id INTEGER,
  availability BOOLEAN
);

CREATE TABLE player_tournament_participation (
  player_id INTEGER,
  tournament_id INTEGER,
  participation BOOLEAN
);

CREATE TABLE matches (
  match_id INTEGER,
  tournament_id INTEGER,
  draw_size INTEGER,
  max_players_per_tournament INTEGER
);


```


CURRENT DATA DICTIONARY:
{
  "tables": {
    "player_availability": {
      "business_purpose": "The availability of players to participate in tournaments.",
      "optimization_role": "constraint_bounds",
      "columns": {
        "player_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a player.",
          "optimization_purpose": "Links availability to specific players.",
          "sample_values": [
            1,
            2,
            3
          ]
        },
        "availability": {
          "data_type": "BOOLEAN",
          "business_meaning": "Whether the player is available to participate in tournaments.",
          "optimization_purpose": "Constraint on player participation.",
          "sample_values": [
            true,
            false,
            true
          ]
        }
      }
    },
    "player_tournament_participation": {
      "business_purpose": "Binary decision variable indicating player participation in a tournament.",
      "optimization_role": "decision_variables",
      "columns": {
        "player_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a player.",
          "optimization_purpose": "Links participation to specific players.",
          "sample_values": [
            1,
            2,
            3
          ]
        },
        "tournament_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a tournament.",
          "optimization_purpose": "Links participation to specific tournaments.",
          "sample_values": [
            101,
            102,
            103
          ]
        },
        "participation": {
          "data_type": "BOOLEAN",
          "business_meaning": "Whether the player participates in the tournament.",
          "optimization_purpose": "Binary decision variable in optimization.",
          "sample_values": [
            true,
            false,
            true
          ]
        }
      }
    },
    "matches": {
      "business_purpose": "Details of matches in tournaments.",
      "optimization_role": "business_data",
      "columns": {
        "match_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a match.",
          "optimization_purpose": "Identifies specific matches.",
          "sample_values": [
            1001,
            1002,
            1003
          ]
        },
        "tournament_id": {
          "data_type": "INTEGER",
          "business_meaning": "Unique identifier for a tournament.",
          "optimization_purpose": "Links matches to specific tournaments.",
          "sample_values": [
            101,
            102,
            103
          ]
        },
        "draw_size": {
          "data_type": "INTEGER",
          "business_meaning": "The number of players in the tournament.",
          "optimization_purpose": "Partial constraint on player participation.",
          "sample_values": [
            32,
            64,
            128
          ]
        },
        "max_players_per_tournament": {
          "data_type": "INTEGER",
          "business_meaning": "The maximum number of players allowed in a tournament.",
          "optimization_purpose": "Constraint on player participation.",
          "sample_values": [
            32,
            64,
            128
          ]
        }
      }
    }
  }
}


CURRENT BUSINESS CONFIGURATION LOGIC:
{
  "max_tournaments_per_player": {
    "sample_value": 3,
    "data_type": "INTEGER",
    "business_meaning": "The maximum number of tournaments a player can participate in.",
    "optimization_role": "Constraint bound for player participation.",
    "configuration_type": "scalar_parameter"
  },
  "max_total_ranking_points": {
    "sample_value": 1000,
    "data_type": "INTEGER",
    "business_meaning": "The maximum total ranking points that can be earned in a tournament.",
    "optimization_role": "Constraint bound for ranking points.",
    "configuration_type": "scalar_parameter"
  }
}


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

JSON STRUCTURE REQUIRED:

{
  "database_id": "wta_1",
  "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": "wta_1",
  "iteration": 2,
  "implementation_summary": "Schema changes include creating a new table for ranking points, modifying existing tables to align with OR expert's mapping, and updating business configuration logic for scalar parameters and formulas.",
  "or_requirements_analysis": {
    "mapping_gaps_identified": [
      "ranking_points[i] is missing in the schema"
    ],
    "missing_data_requirements": [
      "ranking_points[i] (ranking points earned by player i in a tournament)"
    ],
    "business_configuration_logic_needs": [
      "ranking_points[i] is better suited for a table due to its variability across players and tournaments"
    ]
  },
  "schema_adjustment_decisions": {
    "tables_to_delete": [],
    "tables_to_create": [
      {
        "table_name": "player_tournament_ranking_points",
        "purpose": "objective_coefficients",
        "business_meaning": "Ranking points earned by players in tournaments."
      }
    ],
    "tables_to_modify": []
  },
  "business_configuration_logic_updates": {
    "configuration_parameters": {
      "max_tournaments_per_player": {
        "sample_value": 3,
        "data_type": "INTEGER",
        "business_meaning": "The maximum number of tournaments a player can participate in.",
        "optimization_role": "Constraint bound for player participation.",
        "configuration_type": "scalar_parameter"
      },
      "max_total_ranking_points": {
        "sample_value": 1000,
        "data_type": "INTEGER",
        "business_meaning": "The maximum total ranking points that can be earned in a tournament.",
        "optimization_role": "Constraint bound for ranking points.",
        "configuration_type": "scalar_parameter"
      }
    },
    "updates_rationale": "These parameters are scalar values that do not vary across rows and are better suited for configuration logic."
  },
  "implemented_optimization_mapping": {
    "objective_coefficients_mapping": {
      "ranking_points[i]": "player_tournament_ranking_points.ranking_points"
    },
    "constraint_bounds_mapping": {
      "max_tournaments_per_player": "business_configuration_logic.max_tournaments_per_player",
      "max_players_per_tournament": "matches.max_players_per_tournament",
      "availability[i]": "player_availability.availability",
      "max_total_ranking_points": "business_configuration_logic.max_total_ranking_points"
    },
    "decision_variables_mapping": {
      "x[i]": "player_tournament_participation.participation"
    }
  },
  "data_dictionary": {
    "tables": {
      "player_availability": {
        "business_purpose": "The availability of players to participate in tournaments.",
        "optimization_role": "constraint_bounds",
        "columns": {
          "player_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a player.",
            "optimization_purpose": "Links availability to specific players.",
            "sample_values": [
              1,
              2,
              3
            ]
          },
          "availability": {
            "data_type": "BOOLEAN",
            "business_meaning": "Whether the player is available to participate in tournaments.",
            "optimization_purpose": "Constraint on player participation.",
            "sample_values": [
              true,
              false,
              true
            ]
          }
        }
      },
      "player_tournament_participation": {
        "business_purpose": "Binary decision variable indicating player participation in a tournament.",
        "optimization_role": "decision_variables",
        "columns": {
          "player_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a player.",
            "optimization_purpose": "Links participation to specific players.",
            "sample_values": [
              1,
              2,
              3
            ]
          },
          "tournament_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a tournament.",
            "optimization_purpose": "Links participation to specific tournaments.",
            "sample_values": [
              101,
              102,
              103
            ]
          },
          "participation": {
            "data_type": "BOOLEAN",
            "business_meaning": "Whether the player participates in the tournament.",
            "optimization_purpose": "Binary decision variable in optimization.",
            "sample_values": [
              true,
              false,
              true
            ]
          }
        }
      },
      "matches": {
        "business_purpose": "Details of matches in tournaments.",
        "optimization_role": "business_data",
        "columns": {
          "match_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a match.",
            "optimization_purpose": "Identifies specific matches.",
            "sample_values": [
              1001,
              1002,
              1003
            ]
          },
          "tournament_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a tournament.",
            "optimization_purpose": "Links matches to specific tournaments.",
            "sample_values": [
              101,
              102,
              103
            ]
          },
          "draw_size": {
            "data_type": "INTEGER",
            "business_meaning": "The number of players in the tournament.",
            "optimization_purpose": "Partial constraint on player participation.",
            "sample_values": [
              32,
              64,
              128
            ]
          },
          "max_players_per_tournament": {
            "data_type": "INTEGER",
            "business_meaning": "The maximum number of players allowed in a tournament.",
            "optimization_purpose": "Constraint on player participation.",
            "sample_values": [
              32,
              64,
              128
            ]
          }
        }
      },
      "player_tournament_ranking_points": {
        "business_purpose": "Ranking points earned by players in tournaments.",
        "optimization_role": "objective_coefficients",
        "columns": {
          "player_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a player.",
            "optimization_purpose": "Links ranking points to specific players.",
            "sample_values": [
              1,
              2,
              3
            ]
          },
          "tournament_id": {
            "data_type": "INTEGER",
            "business_meaning": "Unique identifier for a tournament.",
            "optimization_purpose": "Links ranking points to specific tournaments.",
            "sample_values": [
              101,
              102,
              103
            ]
          },
          "ranking_points": {
            "data_type": "INTEGER",
            "business_meaning": "Ranking points earned by the player in the tournament.",
            "optimization_purpose": "Coefficient in the objective function.",
            "sample_values": [
              100,
              200,
              300
            ]
          }
        }
      }
    }
  },
  "data_mapping": {
    "objective_sources": [
      "player_tournament_ranking_points.ranking_points"
    ],
    "constraint_sources": [
      "player_availability.availability",
      "matches.max_players_per_tournament",
      "business_configuration_logic.max_tournaments_per_player",
      "business_configuration_logic.max_total_ranking_points"
    ],
    "sample_data_rows": {
      "player_availability": 3,
      "player_tournament_participation": 3,
      "matches": 3,
      "player_tournament_ranking_points": 3
    }
  },
  "validation": {
    "schema_complete": true,
    "data_consistent": true,
    "math_traceable": true,
    "business_aligned": true,
    "follows_db_standards": true
  }
}
