Flow PHP

CrossJoin implements JoinsFrame

Read onlyYes

FinalYes

Every left row is paired with every right row; the right side is pulled on the first batch.

Interfaces

JoinsFrame

Properties

$prefix : string

Methods

__construct() : mixed
children() : array<int, Node>: Inputs, in the order they are planned. children()[0] is the node's ROW INPUT - the chain a rule walks down and the chain Planner::pipelines() cuts into pipelines. A join's second child is the joined frame's whole plan: its Result or Outputs root, read without taking its rows as input and never rewritten by this plan's rewrites.
redefines() : Redefined: Columns this node introduces, renames or removes on its output. A predicate that references one of them means a different column below this node, so it cannot be pushed past it. Answered from what the node holds, never from a class list.
requiredInputColumns() : RequiredColumns
right() : Result|Outputs: The joined frame's whole plan - children()[1]. A rewrite of the plan holding this node never reaches into it.
rowCount() : RowCount: What this node does to the row count. Answered from what the node holds, never from a class list.
transparency() : Transparency: Whether the node's output is a function of the rows it is handed, one at a time, with no effect outside the stream.
withChildren() : self: The same node over new children. Returns $this when the children are the ones it already holds, so an untouched subtree keeps its identity and its planned steps (PlannedNodes remembers them by identity).

$prefix


        public
            string
    $prefix
     = ''

__construct()


    public
                    __construct(Node $input, Node $right[, string $prefix = '' ]) : mixed

Parameters

$input : Node
$right : Node
$prefix : string = ''

children()

Inputs, in the order they are planned. children()[0] is the node's ROW INPUT - the chain a rule walks down and the chain Planner::pipelines() cuts into pipelines. A join's second child is the joined frame's whole plan: its Result or Outputs root, read without taking its rows as input and never rewritten by this plan's rewrites.


    public
                    children() : array<int, Node>

Return values

array<int, Node>

redefines()

Columns this node introduces, renames or removes on its output. A predicate that references one of them means a different column below this node, so it cannot be pushed past it. Answered from what the node holds, never from a class list.


    public
                    redefines() : Redefined

Return values

Redefined

requiredInputColumns()


    public
                    requiredInputColumns(RequiredColumns $output) : RequiredColumns

Parameters

$output : RequiredColumns

Return values

RequiredColumns

right()

The joined frame's whole plan - children()[1]. A rewrite of the plan holding this node never reaches into it.


    public
                    right() : Result|Outputs

Return values

Result|Outputs

rowCount()

What this node does to the row count. Answered from what the node holds, never from a class list.


    public
                    rowCount() : RowCount

Return values

RowCount

transparency()

Whether the node's output is a function of the rows it is handed, one at a time, with no effect outside the stream.


    public
                    transparency() : Transparency

Return values

Transparency

withChildren()

The same node over new children. Returns $this when the children are the ones it already holds, so an untouched subtree keeps its identity and its planned steps (PlannedNodes remembers them by identity).


    public
                    withChildren(array<string|int, mixed> $children) : self

Parameters

$children : array<string|int, mixed>: exactly as many as children() returns

Return values

self