name: OBT Design Optimizer description: Designs and optimizes One Big Table (OBT) patterns version: 1.0.0 category: Data Modeling skillId: SK-DEA-020 allowed-tools:

• Read
• Write
• Edit
• Glob
• Grep
• Bash

OBT Design Optimizer

Overview

Designs and optimizes One Big Table (OBT) patterns. This skill balances denormalization benefits with maintainability for analytical use cases.

Capabilities

• Column selection optimization
• Denormalization strategy
• Nested/repeated field design (BigQuery)
• Clustering key selection
• Partition strategy
• Update frequency optimization
• Query pattern analysis
• Storage vs. performance tradeoffs

Input Schema

{
  "sourceModels": ["object"],
  "queryPatterns": ["object"],
  "platform": "snowflake|bigquery|redshift",
  "constraints": {
    "maxColumns": "number",
    "refreshFrequency": "string"
  }
}

Output Schema

{
  "obtDesign": {
    "columns": ["object"],
    "clustering": ["string"],
    "partitioning": "object"
  },
  "buildStrategy": "object",
  "refreshConfig": "object",
  "estimatedQueryImprovement": "percentage"
}

Target Processes

• OBT Creation
• BI Dashboard Development
• Query Optimization

Usage Guidelines

1. Analyze source models and relationships
2. Document common query patterns
3. Define platform and constraints
4. Balance column count with query needs

Best Practices

• Include only columns needed for known query patterns
• Use appropriate clustering for common filter columns
• Partition by date for time-series analysis
• Schedule refreshes based on source update frequency
• Monitor query performance and adjust design