pub enum WindowFrameUnits {
    Rows,
    Range,
    Groups,
}
Expand description

There are three frame types: ROWS, GROUPS, and RANGE. The frame type determines how the starting and ending boundaries of the frame are measured.

Variants§

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Rows

The ROWS frame type means that the starting and ending boundaries for the frame are determined by counting individual rows relative to the current row.

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Range

The RANGE frame type requires that the ORDER BY clause of the window have exactly one term. Call that term “X”. With the RANGE frame type, the elements of the frame are determined by computing the value of expression X for all rows in the partition and framing those rows for which the value of X is within a certain range of the value of X for the current row.

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Groups

The GROUPS frame type means that the starting and ending boundaries are determine by counting “groups” relative to the current group. A “group” is a set of rows that all have equivalent values for all all terms of the window ORDER BY clause.

Trait Implementations§

Returns a copy of the value. Read more
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Formats the value using the given formatter. Read more
Converts to this type from the input type.
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This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more
This method returns an ordering between self and other values if one exists. Read more
This method tests less than (for self and other) and is used by the < operator. Read more
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
This method tests greater than (for self and other) and is used by the > operator. Read more
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

Auto Trait Implementations§

Blanket Implementations§

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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.