Module preprocess 

SQL pre-processing: rewrite NodeDB-specific syntax into standard SQL before handing to sqlparser-rs.

Handles:

• UPSERT INTO coll (cols) VALUES (vals) → INSERT INTO coll (cols) VALUES (vals) + upsert flag
• INSERT INTO coll { key: 'val', ... } → INSERT INTO coll (key) VALUES ('val') + object literal flag
• UPSERT INTO coll { key: 'val', ... } → both rewrites combined

Structs

PreprocessedSql

Result of pre-processing a SQL string.

Functions

preprocess

Pre-process a SQL string, rewriting NodeDB-specific syntax.

value_to_sql_literal

Convert a nodedb_types::Value to a SQL literal string.