Module interval_rewriter 

INTERVAL arithmetic rewriter for BIGINT timestamp columns Interval arithmetic rewriter for BIGINT timestamp columns.

LaminarDB uses BIGINT millisecond timestamps for event time. DataFusion cannot natively evaluate Int64 ± INTERVAL, so this module rewrites INTERVAL expressions in arithmetic operations to equivalent millisecond integer literals before the SQL reaches DataFusion.

Example

-- Before rewrite:
SELECT * FROM trades t
INNER JOIN orders o ON t.symbol = o.symbol
  AND o.ts BETWEEN t.ts - INTERVAL '10' SECOND AND t.ts + INTERVAL '10' SECOND

-- After rewrite:
SELECT * FROM trades t
INNER JOIN orders o ON t.symbol = o.symbol
  AND o.ts BETWEEN t.ts - 10000 AND t.ts + 10000

Functions

rewrite_expr_mut

Rewrite INTERVAL arithmetic in an expression tree, in place.

rewrite_interval_arithmetic

Rewrite all INTERVAL arithmetic in a SQL [Statement].