我正在尝试通过在Postgres中运行一个简单的\ copy命令将CSV文件复制到表中；
postgres-# \copy solved_at FROM '/Users/funnychef/Downloads/export.csv' DELIMITER AS ',';
每次我运行命令时，都会收到“权限被拒绝”错误：
/Users/funnychef/Downloads/export.csv: Permission denied
对该文件的权限是完全开放的；
$ ls -ltr ~/Downloads/expor.csv
-rwxrwxrwx 1 funnychef staff 145524 Jul 8 22:15 /Users/funnychef/Downloads/export.csv
我认为此问题与_postgres用户无权访问该文件有关，因此我将该用户设为文件的所有者，但仍然收到错误。
$ ls -ltr ~/Downloads/expor.csv
-rwxrwxrwx 1 _postgres staff 145524 Jul 8 22:15 /Users/funnychef/Downloads/export.csv
我想念什么？
答案 0 :(得分：0)
将文件复制到 id<MTLCommandBuffer> commandBuffer = [MetalContext.defaultContext.commandQueue commandBuffer];
commandBuffer.label = @"DrawCB";
dispatch_semaphore_wait(_inFlightSemaphore, DISPATCH_TIME_FOREVER);
mRenderPassDescriptor.colorAttachments[0].texture = target;
__block dispatch_semaphore_t block_sema = _inFlightSemaphore;
[commandBuffer addCompletedHandler:^(id<MTLCommandBuffer> buffer) {
dispatch_semaphore_signal(block_sema);
}];
_vertexArray = [[NSMutableArray alloc] init];
for (int i = 0; i < strokes; i++) {
id<MTLBuffer> vertexBuffer = [MetalContext.defaultContext.device newBufferWithLength:8 * sizeof(Float32) options:0];
[_vertexArray addObject:vertexBuffer];
id<MTLTexture> brush = [_brushes objectAtIndex:rand()%_brushes.count];
[self renderBrush:brush onTarget:target at:CGPointMake(x, y) withCommandBuffer:commandBuffer];
x += deltaX;
y += deltaY;
}
[commandBuffer commit];
目录并读取csv。 /tmp的常规设置为1777，/tmp显示为ls