Module window 

Window Function SQL Generation

Generates database-specific SQL for window functions.

Supported Databases

• PostgreSQL: Full support (all functions + GROUPS frames + frame exclusion)
• MySQL 8.0+: Full support (no GROUPS, no frame exclusion)
• SQLite 3.25+: Basic support (no GROUPS, no PERCENT_RANK/CUME_DIST)
• SQL Server: Full support (STDEV/VAR naming difference)

Structs

WindowSql

Generated SQL for window function query

WindowSqlGenerator

Window function SQL generator