Folder reorganize 1

sql/create_query_log.sql

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+-- Query log table for capturing form-based searches
+-- Used to seed few-shot examples for NL2SQL agent
+
+IF OBJECT_ID('dbo.controls_query_log', 'U') IS NULL
+BEGIN
+    CREATE TABLE dbo.controls_query_log (
+        id              INT IDENTITY(1,1) PRIMARY KEY,
+        user_query      NVARCHAR(1000)   NOT NULL,   -- Natural-language description of the search
+        sql_template    NVARCHAR(MAX)    NOT NULL,   -- Parameterized SQL (placeholders like :tag, :start, :end)
+        sql_template_hash AS CONVERT(VARBINARY(32), HASHBYTES('SHA2_256', sql_template)) PERSISTED,  -- For indexing
+        params          NVARCHAR(MAX)    NULL,       -- JSON blob of actual parameter values
+        source_form     NVARCHAR(100)    NULL,       -- Which form generated this (e.g., 'opcsearch', 'trend')
+        user_session    NVARCHAR(100)    NULL,       -- Optional: session or user identifier
+        execution_ms    INT              NULL,       -- Optional: query execution time in milliseconds
+        row_count       INT              NULL,       -- Optional: number of rows returned
+        created_at      DATETIME2        NOT NULL DEFAULT SYSUTCDATETIME()
+    );
+
+    -- Index on hash for deduplication and fast lookup
+    CREATE NONCLUSTERED INDEX IX_controls_query_log_template_hash
+        ON dbo.controls_query_log (sql_template_hash)
+        INCLUDE (user_query, created_at);
+
+    -- Index for time-based analysis
+    CREATE NONCLUSTERED INDEX IX_controls_query_log_created
+        ON dbo.controls_query_log (created_at DESC)
+        INCLUDE (user_query, source_form);
+END;
+GO
+
+-- View for distinct templates with example user queries
+CREATE OR ALTER VIEW dbo.vw_controls_query_templates AS
+SELECT
+    sql_template,
+    COUNT(*)                           AS usage_count,
+    MAX(user_query)                    AS sample_user_query,
+    MIN(created_at)                    AS first_used,
+    MAX(created_at)                    AS last_used
+FROM dbo.controls_query_log
+GROUP BY sql_template;
+GO