Module json_expr 

Expression evaluation against a JSON row.

Scan handlers materialize rows as serde_json::Value before applying ORDER BY and window functions. Both evaluate arbitrary expressions per row and both must surface an evaluation failure — a zero divisor in ORDER BY 100 / weight fails the statement with SQLSTATE 22012 rather than sorting the row under NULL.

Functions

compare_json

Total order over JSON values for sorting.

eval_expr_on_json

Evaluate expr against a JSON row.