Development

Database Transaction Commit Failure in WAL Mode After Explicit Disabling The core issue revolves around an Android application experiencing a native crash during SQLite transaction commits, specifically within Write-Ahead Logging (WAL) subsystem functions such as walIndexAppend, despite the developer explicitly disabling WAL mode via SQLiteDatabase.disableWriteAheadLogging(). The crash occurs in Android 9 (API 28) devices, with…

Issue Overview: OPFS-sahpool VFS Filename Encoding Bug and WASM Build Challenges The core issue revolves around a bug in the OPFS-sahpool VFS (Virtual File System) implementation in SQLite/WASM, specifically related to filename encoding when files are reused from the SahPool. When a file is returned to the pool and later reused for another database, the…

Issue Overview: Mismatched Entry Points Between Managed System.Data.SQLite and Native SQLite.Interop.dll When integrating the managed System.Data.SQLite library with the native SQLite.Interop.dll, a critical requirement is that the managed assembly must locate and bind to specific exported functions (entry points) in the native DLL. These entry points are the bridges between the .NET runtime and the…

Database Serialization Failure with SQLITE_NOMEM in WebAssembly (Wasm) Environments Issue Overview: Serialization Failure During Wasm Database Export When attempting to export a large SQLite database (500+ MB) in a WebAssembly (Wasm) environment using the sqlite3_js_db_export method or the Promiser API’s export command, the operation fails with the error code SQLITE_NOMEM ("out of memory"). This issue…

JSONB Implementation Scope and Usage Clarifications The introduction of JSONB in SQLite 3.44.0 beta has sparked debates about its intended role. JSONB is a binary representation of JSON designed for efficient storage and processing within SQLite. However, confusion arose due to conflicting interpretations of its purpose. Users questioned whether JSONB should be treated as a…

Understanding the Asynchronous Initialization Problem in SQLite WASM JS Worker The core issue revolves around the asynchronous initialization of a SQLite database instance within a WebAssembly (WASM) environment, specifically when using a JavaScript Worker. The problem manifests when the database operations are attempted before the SQLite Worker has fully initialized the database instance (dbInstance). This…

Virtual Table Constraint Enforcement and Conflict Resolution Mismatch Issue Overview The problem arises when using the INSERT OR IGNORE statement to batch-insert rows into a SQLite virtual table that implements the xUpdate method and enforces a NOT NULL constraint on a specific column. The virtual table’s xUpdate method returns SQLITE_CONSTRAINT_NOTNULL when a row violates the…

Issue Overview: Duplicate Column in WITHOUT ROWID Primary Key Triggers Assertion During Schema Recovery The core issue arises when attempting to create a WITHOUT ROWID table in SQLite with a composite primary key that includes the same column twice but with conflicting collation sequences. The specific error manifests as an assertion failure in the recoverAddTable…

Understanding the Assertion Failure in PreUpdateHook During Schema Modification The assertion failure in sqlite3VdbePreUpdateHook occurs during the execution of a schema modification operation involving a temporary table with a generated column and a primary key. This error is triggered when SQLite’s virtual database engine (VDBE) detects an inconsistency between the number of fields managed by…

Understanding the Assertion Failure in sqlite3PcacheMove The core issue revolves around an assertion failure in the SQLite function sqlite3PcacheMove, specifically triggered by the assertion pXPage->nRef==0. This assertion ensures that the page being moved within the page cache (pcache) has a reference count of zero, meaning no active references to the page exist at the time…