Resolving SQLITE_ERROR: No Such Column and PRIMARY KEY Constraint Failures in SQLite

Resolving SQLITE_ERROR: No Such Column and PRIMARY KEY Constraint Failures in SQLite

BySQLite.work Team

String Literal Syntax and Primary Key Violations in SQLite INSERT Statements Issue Overview: Double-Quoted String Literals and Primary Key Reuse The core issues discussed involve two distinct but related SQLite errors encountered during data insertion: SQLITE_ERROR: No such column when attempting to insert string values enclosed in double quotes. SQLITE_CONSTRAINT_PRIMARYKEY: UNIQUE constraint failed after correcting…

Resolving “Unknown Message 0x8C” Error in SQLite3-Rsync on Windows

Resolving “Unknown Message 0x8C” Error in SQLite3-Rsync on Windows

BySQLite.work Team

Issue Overview: Protocol Corruption During SQLite3-Rsync Synchronization The core issue revolves around the SQLite3-rsync utility failing to synchronize two SQLite database files on Windows 11, returning the error "Unknown message 0x8C 148 bytes into conversation." This error indicates a protocol violation during the rsync-like synchronization process, where the origin and replica processes exchange a sequence…

System.Data.SQLite: Incorrect UNIQUE Flag in GetSchemaTable() for Columns Allowing NULL

System.Data.SQLite: Incorrect UNIQUE Flag in GetSchemaTable() for Columns Allowing NULL

BySQLite.work Team

Issue Overview: Misidentification of UNIQUE Columns in GetSchemaTable() The core issue revolves around the behavior of the GetSchemaTable() method in the System.Data.SQLite library, specifically when determining the uniqueness of columns in a SQLite database. The problem manifests when a column is defined as UNIQUE but also allows NULL values. In such cases, the GetSchemaTable() method…

SQLite3 Shell on Windows Fails to Handle Unicode Filenames Correctly

SQLite3 Shell on Windows Fails to Handle Unicode Filenames Correctly

BySQLite.work Team

Understanding SQLite3 Shell’s Unicode Filename Handling Limitations on Windows Issue Overview: Mismatched Encoding in Filename Processing During CSV Import/Export The SQLite3 command-line shell (sqlite3.exe) on Windows exhibits inconsistent behavior when processing filenames containing non-ASCII Unicode characters during CSV import (.import) and export (.output). For example, attempting to import a CSV file named äöü.csv results in…

Resolving SQLite Extension Compilation and Loading Issues on Windows

Resolving SQLite Extension Compilation and Loading Issues on Windows

BySQLite.work Team

Compilation Errors and Missing SQLITE_SELFORDER1 Identifier When attempting to compile the percentile.c extension for SQLite, a common issue arises due to version mismatches between the extension source code and the SQLite header file (sqlite3.h). The error message error C2065: ‘SQLITE_SELFORDER1’: undeclared identifier is a clear indicator that the sqlite3.h header file being used does not…

Missing macOS ARM64 Native Library in System.Data.SQLite.Core NuGet Package

Missing macOS ARM64 Native Library in System.Data.SQLite.Core NuGet Package

BySQLite.work Team

System.Data.SQLite.Core macOS M1/ARM64 Compatibility Challenges Issue Overview: Absence of ARM64 Native Interop in SQLite.Core NuGet Packages The core problem stems from the System.Data.SQLite.Core NuGet package lacking precompiled native libraries (SQLite.Interop.dll) for macOS ARM64 (M1/M2/M3 chips). This omission prevents applications relying on this package from functioning natively on Apple Silicon devices. When developers target macOS ARM64…

Foreign Key Constraints in SQLite: Default Behavior and Persistent Enforcement

Foreign Key Constraints in SQLite: Default Behavior and Persistent Enforcement

BySQLite.work Team

Foreign Key Constraints: Default Behavior and Compile-Time Configuration Foreign key constraints in SQLite are a powerful feature for maintaining referential integrity between tables. However, their behavior is not enabled by default, which can lead to confusion or unintended data inconsistencies if developers are unaware of this setting. The default behavior of foreign key constraints is…

Inconsistent SQLITE_CORE Macro Checks in SQLite Extensions

Inconsistent SQLITE_CORE Macro Checks in SQLite Extensions

BySQLite.work Team

SQLITE_CORE Macro Behavior in Static vs Dynamic Extensions The SQLITE_CORE macro serves as a critical configuration flag in SQLite’s architecture, determining whether code is compiled as part of the SQLite core library or as a loadable extension. When SQLITE_CORE is defined (typically via compiler flags like -DSQLITE_CORE), the build process assumes the code belongs to…

SQLite 3.47.0 Tcl Extension Typedef Conflict Issue

SQLite 3.47.0 Tcl Extension Typedef Conflict Issue

BySQLite.work Team

Issue Overview: Tcl_Size Typedef Conflict in SQLite 3.47.0 Tcl Extension Build The core issue revolves around a compilation error encountered when building the SQLite 3.47.0 Tcl extension, specifically within the tclsqlite3.c file. The error manifests as a conflict between the Tcl_Size typedef and a command-line definition of Tcl_Size as int. This conflict arises due to…

Ensuring Consistent Backups with sqlite_dbpage and WAL in SQLite

Ensuring Consistent Backups with sqlite_dbpage and WAL in SQLite

BySQLite.work Team

Understanding the Interaction Between sqlite_dbpage, WAL, and Backup Consistency The process of creating reliable backups of SQLite databases operating in Write-Ahead Logging (WAL) mode involves navigating subtle interactions between the database file, the WAL file, and virtual tables like sqlite_dbpage. A common challenge arises when attempting to create a point-in-time snapshot of the database by…