Understanding the Rounding Discrepancies in SQLite The core issue revolves around the inconsistent behavior of the ROUND() function in SQLite, where certain floating-point numbers are not rounded as expected. This problem manifests in specific scenarios, particularly when dealing with numbers like 146.3599 or 10.555, where the rounding results deviate from the expected output. For example,…
Issue Overview: SQLite Wasm OPFS Compatibility in Safari and Firefox The core issue revolves around the compatibility of SQLite Wasm with the Origin-Private File System (OPFS) in Safari and Firefox browsers. SQLite Wasm is a WebAssembly (Wasm) build of SQLite that allows running SQLite directly in the browser. OPFS is a browser API that provides…
Understanding BLOB Storage and Last Leaf Page Fragmentation in SQLite SQLite’s architecture relies on B-tree structures to organize table and index data. Each table is stored as a B-tree, where leaf pages contain the actual row data. When storing Binary Large Objects (BLOBs), SQLite employs a hybrid approach: small BLOBs (up to a threshold determined…
Understanding Non-Deterministic Results in Views with Aggregate Functions and NULL Values Root Cause Analysis: Why Aggregate Queries with NULLs Produce Inconsistent Results The core issue revolves around SQLite’s handling of non-aggregated columns in aggregate queries and NULL semantics, particularly when combined with views. Let’s dissect the problem step-by-step. Table Structure and Data The table v0…
Issue Overview: SQLite Parameter Case Sensitivity and Backward Compatibility The core issue revolves around an error message, "Insufficient parameters supplied to the command," which occurs when upgrading from SQLite version 1.0.117 to 1.0.118 in a VB.NET application. The application uses the System.Data.SQLite.Core.NetStandard library to interact with a SQLite database. The error arises during an INSERT…
Database Recovery Failure Due to Partial sqlite_master Page Corruption in SQLite 3.42.0 Issue Overview: Truncated Database File Recovery Behavior Change Between SQLite 3.41.2 and 3.42.0 A critical regression was identified in SQLite version 3.42.0 involving recovery of partially corrupted database files, specifically when truncation damages the sqlite_master table stored on page 14 of the sample…
In-Memory Database Initialization and Connection Handling in VB Issue Overview: Tables and Records Not Persisting Across VB Subroutines The core issue involves an in-memory SQLite database accessed via ODBC in a Visual Basic (VB) application, where tables and records created in one subroutine are not accessible in subsequent subroutines. The application initializes the database connection…
Understanding the Problem of Duplicate Rows in SQLite Tables Duplicate rows in a SQLite table can arise from various scenarios, such as data import errors, application logic flaws, or even user input mistakes. The presence of duplicates can lead to inaccurate query results, increased storage usage, and performance degradation. The core issue in the provided…
Understanding the Trigger WHEN Clause Behavior in SQLite FTS5 Indexing The core issue revolves around the apparent disregard of the WHEN clause in a trigger designed to populate an FTS5 (Full-Text Search) index in SQLite. The trigger is intended to execute only when a specific condition is met, such as when a newly inserted row’s…
Understanding FTS5 Query Syntax Errors and Automatic Query Transformation SQLite’s FTS5 extension is designed to enable fast, flexible full-text search capabilities. However, its query parser enforces strict syntax rules that differ from informal, human-language search patterns. A common challenge arises when users input queries containing symbols not recognized by FTS5’s syntax, such as periods (.),…