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How do you find the disk size of a Postgres / PostgreSQL table and its indexes
... ELSE 'N'
END AS UNIQUE,
idx_scan AS number_of_scans,
idx_tup_read AS tuples_read,
idx_tup_fetch AS tuples_fetched
FROM pg_tables t
LEFT OUTER JOIN pg_class c ON t.tablename=c.relname
LEFT OUTER JOIN
( SELECT c.relname AS ctablename, ipg.relname AS indexname, x.indnatts AS numbe...
PostgreSQL - how to quickly drop a user with existing privileges
...
Andrew, best to read the documentation for clarification. DROP OWNED BY will drop tables owned by that user. REASSIGN OWNED BY will reassign those tables to a different user. Choose one.
– Tim Kane
Fe...
Differences between lodash and underscore [closed]
...e beefed up documentation, added custom builds, & made the source more readable.
– John-David Dalton
Dec 16 '12 at 17:50
10
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Constantly print Subprocess output while process is running
...iter to process lines as soon as the command outputs them: lines = iter(fd.readline, ""). Here's a full example showing a typical use case (thanks to @jfs for helping out):
from __future__ import print_function # Only Python 2.x
import subprocess
def execute(cmd):
popen = subprocess.Popen(cmd,...
C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...app;
///是否已经预加载了某个sheet的数据
BOOL already_preload_;
///Create the SAFEARRAY from the VARIANT ret.
COleSafeArray ole_safe_array_;
LPDISPATCH m_lpDisp;
};
ExcelOp.cpp
#include "StdAfx.h"
#include "ExcelOp.h"
#ifdef _DEBUG
#define new...
How to pass the value of a variable to the stdin of a command?
...first line(s) will be the contents of $var but the rest will come from cat reading its standard input. If the command does not do anything too fancy (try to turn on command line editing, or run like vim does) then it will be fine. Otherwise, you need to get really fancy - I think expect or one of ...
Why does C# allow {} code blocks without a preceding statement?
...erface implementation written in another language, and that implementation reads the variable before writing it.
– supercat
Jul 14 '15 at 17:25
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How can i tell if an object has a key value observer attached
...avior, however, as I haven't seen it documented. Also, I don't know how to read observationInfo to get specific observers.
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PostgreSQL: How to make “case-insensitive” query
...t programmers don't have to remember to lowercase strings. But you need to read the sections "String Comparison Behavior" and "Limitations" in the docs before you decide to use citext.
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What are WSGI and CGI in plain English?
Every time I read either WSGI or CGI I cringe. I've tried reading on it before but nothing really has stuck.
4 Answers
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