How to fix SQLITE_INTERNAL: Internal logic error in SQLite in SQLite

// In C code, enable extended error codes
sqlite3_extended_result_codes(db, 1);

// Enable verbose error messages
sqlite3_config(SQLITE_CONFIG_LOG, errorLogCallback, NULL);

try {
  const result = db.prepare('SELECT * FROM users').all();
} catch (error) {
  console.error('SQLite error:', error.code, error.message);
  console.error('Full error object:', error);
}

import sqlite3

try:
    conn = sqlite3.connect('database.db')
    cursor = conn.cursor()
    cursor.execute('SELECT * FROM users')
except sqlite3.Error as e:
    print(f"SQLite error: {e.sqlite_errorcode} - {e.sqlite_errorname}")
    print(f"Error message: {e}")

# Download latest SQLite amalgamation
wget https://www.sqlite.org/2025/sqlite-amalgamation-3450000.zip
unzip sqlite-amalgamation-3450000.zip
cd sqlite-amalgamation-3450000

# Compile with debugging enabled
gcc -g -O0 -DSQLITE_DEBUG -DSQLITE_ENABLE_EXPLAIN_COMMENTS     -o test-sqlite shell.c sqlite3.c -lpthread -ldl

# Test the error
./test-sqlite database.db "SELECT * FROM users"

-- In SQLite shell
PRAGMA compile_options;

-- Look for unusual options or missing standard features

// In C, don't load extensions
// Or explicitly disable with:
sqlite3_db_config(db, SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION, 0, NULL);

// Register function
sqlite3_create_function(db, "my_function", 1, SQLITE_UTF8, NULL,
                       &my_function_impl, NULL, NULL);

// Test it thoroughly
sqlite3_exec(db, "SELECT my_function(column) FROM table",
            callback, NULL, &error);

// Minimal test program for your extension
int main() {
    sqlite3 *db;
    sqlite3_open(":memory:", &db);

    // Register your extension
    register_my_extension(db);

    // Test specific functionality
    const char *sql = "SELECT my_extension_test()";
    int rc = sqlite3_exec(db, sql, NULL, NULL, NULL);

    if (rc == SQLITE_INTERNAL) {
        printf("Extension causes SQLITE_INTERNAL
");
    }

    sqlite3_close(db);
    return 0;
}

# Compile SQLite with memory debugging
gcc -DSQLITE_DEBUG -DSQLITE_MEMDEBUG -DSQLITE_ENABLE_MEMORY_MANAGEMENT     -o sqlite-debug shell.c sqlite3.c

# Run with memory tracking
./sqlite-debug database.db

valgrind --tool=memcheck --leak-check=full          --show-leak-kinds=all          --track-origins=yes          ./your-application

// Enable SQLite's memory statistics
sqlite3_status(SQLITE_STATUS_MEMORY_USED, &current, &highwater, 0);

// Check for memory leaks
sqlite3_db_release_memory(db);

Title: SQLITE_INTERNAL error in [specific function/operation]

Description:
- SQLite version: 3.45.0
- Platform: Ubuntu 22.04 x86_64, gcc 11.4.0
- Compilation: Default amalgamation build
- Steps to reproduce: [detailed steps]
- Expected behavior: [what should happen]
- Actual behavior: SQLITE_INTERNAL error
- Minimal test case: [attached code]

-- Instead of problematic query:
-- SELECT complex_function(data) FROM table;

-- Use alternative:
SELECT data FROM table;
-- Process in application code

# Try different SQLite versions
wget https://www.sqlite.org/2024/sqlite-amalgamation-3440000.zip
wget https://www.sqlite.org/2025/sqlite-amalgamation-3450100.zip

# Instead of custom SQL function
# Implement in Python/application code

def process_data_in_app(data):
    # Your logic here
    return result

# Query raw data, process in app
cursor.execute("SELECT data FROM table")
rows = cursor.fetchall()
results = [process_data_in_app(row[0]) for row in rows]

// Comprehensive test suite for extensions
void test_extension() {
    // Test normal cases
    assert(extension_func("input") == "expected");

    // Test edge cases
    assert(extension_func(NULL) == NULL);
    assert(extension_func("") == "");

    // Test error conditions
    // ...
}

# Run SQLite's own test suite with your extension
make test

// In extension functions
static void my_func(sqlite3_context *context, int argc, sqlite3_value **argv) {
    if (argc != 1) {
        sqlite3_result_error(context, "Wrong number of arguments", -1);
        return;
    }

    // Always check for null
    if (sqlite3_value_type(argv[0]) == SQLITE_NULL) {
        sqlite3_result_null(context);
        return;
    }

    // Your implementation...
}

// Check SQLite version at runtime
#if SQLITE_VERSION_NUMBER >= 3042000
    // Use newer features
#else
    // Fallback for older versions
#endif

-- Log unusual errors
CREATE TABLE error_log (
    timestamp DATETIME DEFAULT CURRENT_TIMESTAMP,
    error_code INTEGER,
    error_message TEXT,
    query TEXT,
    context TEXT
);

-- Trigger to log SQLITE_INTERNAL errors
-- (Implement in application code for most databases)