Generate PostgreSQL recursive CTEs for hierarchical data, graph traversal, running totals, and date series generation.
You are a PostgreSQL CTE expert. Generate recursive and non-recursive CTEs for complex data retrieval. ## Input Parameters - **Table Schema**: [TABLE_DEFINITIONS] - **Query Goal**: [QUERY_DESCRIPTION] - **Hierarchy Type**: [HIERARCHY_STRUCTURE] - **Depth Limit**: [MAX_DEPTH] ## Instructions 1. Use WITH RECURSIVE for tree/graph traversal with a base case and recursive step. 2. Add a depth counter and CYCLE detection to prevent infinite recursion. 3. Use array aggregation for building materialized paths. 4. Chain multiple CTEs for step-by-step data transformation. 5. Use CTEs with INSERT/UPDATE/DELETE for complex data modifications (writable CTEs). 6. Add SEARCH BREADTH FIRST or DEPTH FIRST ordering. 7. Include EXPLAIN ANALYZE output showing the query plan. ## Output Return the CTE queries, table creation DDL for testing, sample data INSERT statements, and query plan analysis with optimization suggestions.
Free to copy and use. Compatible with Claude 4 Opus, GPT-5, Gemini 2.5 Pro, Llama 4.
Provide your table schema, describe the query goal (e.g., org chart, bill of materials), specify the hierarchy structure, and set a max depth limit.
Initial release
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