Author: SQLite.work Team

Understanding FTS5 Snippet Function Limitations for Multi-Highlight Extraction The challenge of retrieving multiple highlighted snippets from a single FTS5 virtual table column arises from the inherent design of SQLite’s Full-Text Search (FTS5) engine. When a user queries an FTS5 table using the snippet auxiliary function, the system returns a single contiguous excerpt from the specified…

Collapsing String Comparisons via RTRIM Collation and Bloom Filter Mismatch When executing queries that combine string comparisons with non-binary collations and Bloom filter optimizations, SQLite may return incorrect results due to fundamental incompatibilities between hashing strategies and collation-aware equality checks. This manifests when comparing values that are considered equivalent under specific collation rules (e.g., RTRIM)…

Issue Overview: Encrypted Main Database Rejects Attachment of Unencrypted Database via RC4-Aware System.Data.SQLite The core challenge involves attaching an unencrypted SQLite database to an encrypted main database using the System.Data.SQLite library in C#. The main database employs RC4 encryption managed via the library’s SetPassword method. The unencrypted database attachment fails with the "File is not…

Issue Overview: RIGHT JOIN Behavior with Table-Valued Functions in SQLite 3.40 The core issue revolves around a change in the behavior of the RIGHT JOIN operation when used with table-valued functions in SQLite, specifically starting from version 3.40. Table-valued functions, such as json_each, are virtual tables that allow users to iterate over JSON objects or…

Analyzing Unexpected Query Results Involving Window Functions and Constant WHERE Clauses Structure of the Query and Observed Behavior The core issue arises from a combination of a view definition using a window function (TOTAL() OVER) and a WHERE clause that evaluates a constant expression. The query returns 0 for COUNT(*) when the logical expectation is…