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Standard syntax: INSERT OVERWRITE TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...) [IF NOT EXISTS]] select_statement1 FROM from_statement; INSERT INTO TABLE tablename1 [PARTITION (partcol1=val1, partcol2=val2 ...)] select_statement1 FROM from_statement; INSERT INTO T...

-- Create simple index CREATE INDEX index_name ON table_name(column_name1 [, column_name2, ...]) -- Create unique index CREATE UNIQUE INDEX index_name ON table_name(column_name1 [, column_name2, ...] -- Drop index DROP INDEX index_name ON tbl_name [algorithm_option | lock_option] ....

Perfect forwarding requires forwarding references in order to preserve the ref-qualifiers of the arguments. Such references appear only in a deduced context. That is: template<class T> void f(T&& x) // x is a forwarding reference, because T is deduced from a call to f() { g(s...

virtual void f(); virtual void g() = 0; // C++11 or later: virtual void h() override; void i() override; virtual void j() final; void k() final; Only non-static, non-template member functions can be virtual. If you are using C++11 or later, it is recommended to use ...

VersionMajor ChangesRelease Date3.02004-06-183.7.11SELECT max(x), y2012-03-203.8.3CTEs2014-02-11

CSS Variables allow authors to create reusable values which can be used throughout a CSS document. For example, it's common in CSS to reuse a single color throughout a document. Prior to CSS Variables this would mean reusing the same color value many times throughout a document. With CSS Variables ...

Environment variables in dynamic inventory won't work, f.e. "ansible_ssh_private_key_file": $HOME/.ssh/key.pem" If the dynamic inventory server side passes $HOME for example, replace the variable in the client code (Python): json_input.replace("$HOME", os.environ.get(...

JSONField(**options) Django's JSONField actually stores the data in a Postgres JSONB column, which is only available in Postgres 9.4 and later. JSONField is great when you want a more flexible schema. For example if you want to change the keys without having to do any data migratio...

Rust uses Result<T, E> values to indicate recoverable errors during execution. Unrecoverable errors cause Panics which is a topic of its own. Details of error handling is described in The Rust Programming Language (a.k.a The Book)

ParameterExplanationansible_connectionConnection type to the host. This can be the name of any of ansible’s connection plugins. SSH protocol types are smart, ssh or paramiko. The default is smart. Non-SSH based types are described in the next section.ansible_hostThe name of the host to connect to, ...

typing.Callable[[int, str], None] -> def func(a: int, b: str) -> None typing.Mapping[str, int] -> {"a": 1, "b": 2, "c": 3} typing.List[int] -> [1, 2, 3] typing.Set[int] -> {1, 2, 3} typing.Optional[int] -> None or int typing.Sequence[int] ->...

Umbraco is an open source, MIT-Licensed .NET content management system. Initially created by Danish developer Niels Hartvig in 2000 as a hobby project, Umbraco was released as open source in 2004 and has since been developed and maintained continuously by a core team made up of paid Umbraco employ...

Silverstripe is an open source PHP content management system. A developer might want to use it because BSD License - meaning it can be rebranded as your own application Clean Object Oriented code very easy to understand and use - along with extend and customise Simple and powerful template en...

ActiveModel was created to extract the model behavior of ActiveRecord into a separate concern. This allows us to use ActiveModel behavior in any object, not just ActiveRecord models. ActiveRecord objects include all of this behavior by default.