Class: Google::Cloud::Bigtable::RowFilter::InterleaveFilter
- Inherits:
-
Object
- Object
- Google::Cloud::Bigtable::RowFilter::InterleaveFilter
- Defined in:
- lib/google/cloud/bigtable/row_filter/interleave_filter.rb
Overview
InterleaveFilter
A RowFilter that sends each row to each of several component RowFilters and interleaves the results.
The elements of "filters" all process a copy of the input row, and the results are pooled, sorted, and combined into a single output row. If multiple cells are produced with the same column and timestamp, they will all appear in the output row in an unspecified mutual order. Consider the following example, with three filters:
input row
|
-----------------------------------------------------
| | |
f(0) f(1) f(2)
| | |
1: foo,bar,10,x foo,bar,10,z far,bar,7,a
2: foo,blah,11,z far,blah,5,x far,blah,5,x
| | |
-----------------------------------------------------
|
1: foo,bar,10,z # could have switched with #2
2: foo,bar,10,x # could have switched with #1
3: foo,blah,11,z
4: far,bar,7,a
5: far,blah,5,x # identical to #6
6: far,blah,5,x # identical to #5
All interleaved filters are executed atomically.
Instance Method Summary collapse
-
#block ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a block-all filter instance.
-
#cells_per_column(limit) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a cells-per-column filter instance.
-
#cells_per_row(limit) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a cells-per-row-limit filter instance.
-
#cells_per_row_offset(offset) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a cell-per-row-offset filter instance to skip the first N cells.
-
#chain(filter) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a chain filter instance.
-
#column_range(range) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a column-range filter instance.
-
#condition(filter) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a condition filter instance.
-
#family(regex) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a family-name-match filter using a regular expression.
-
#filters ⇒ Array<SimpleFilter|ChainFilter|InterleaveFilter|ConditionFilter>
Returns a frozen copy of the filters array.
-
#interleave(filter) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds an interleave filter.
-
#key(regex) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a row-key filter instance to match key using a regular expression.
-
#label(value) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a label filter instance to apply a label based on the result of read rows.
-
#length ⇒ Integer
Returns the number of filters in the interleave.
-
#pass ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a pass filter instance.
-
#qualifier(regex) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a column-qualifier-match filter using a regular expression.
-
#sample(probability) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a sample-probability filter instance.
-
#sink ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a sink filter instance.
-
#strip_value ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a strip-value filter instance.
-
#timestamp_range(from: nil, to: nil) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a timestamp-range filter instance.
-
#value(regex) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a value-match filter using a regular expression.
-
#value_range(range) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a value-range filter instance.
Instance Method Details
#block ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a block-all filter instance.
Does not match any cells, regardless of input. Useful for temporarily disabling just part of a filter.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 225 def block add RowFilter.block end |
#cells_per_column(limit) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a cells-per-column filter instance.
Matches only the most recent N cells within each column. For example,
if N=2, this filter would match column foo:bar
at timestamps 10 and 9,
skip all earlier cells in foo:bar
, and then begin matching again in
column foo:bar2
.
If duplicate cells are present, as is possible when using an interleave,
each copy of the cell is counted separately.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 464 def cells_per_column limit add RowFilter.cells_per_column(limit) end |
#cells_per_row(limit) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a cells-per-row-limit filter instance.
Matches only the first N cells of each row. If duplicate cells are present, as is possible when using an interleave, each copy of the cell is counted separately.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 442 def cells_per_row limit add RowFilter.cells_per_row(limit) end |
#cells_per_row_offset(offset) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a cell-per-row-offset filter instance to skip the first N cells.
Skips the first N cells of each row, matching all subsequent cells. If duplicate cells are present, as is possible when using an interleave, each copy of the cell is counted separately.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 423 def cells_per_row_offset offset add RowFilter.cells_per_row_offset(offset) end |
#chain(filter) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a chain filter instance.
A Chain RowFilter that sends rows through several RowFilters in sequence.
See Google::Cloud::Bigtable::RowFilter::InterleaveFilter.
The elements of "filters" are chained together to process the input row: in row -> f(0) -> intermediate row -> f(1) -> ... -> f(N) -> out row The full chain is executed atomically.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 106 def chain filter raise RowFilterError, "Filter type must be ChainFilter" unless filter.instance_of? ChainFilter add filter end |
#column_range(range) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a column-range filter instance.
Matches only cells from columns within the given range.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 547 def column_range range add RowFilter.column_range(range) end |
#condition(filter) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a condition filter instance.
A RowFilter that evaluates one of two possible RowFilters, depending on whether or not a predicate RowFilter outputs any cells from the input row.
IMPORTANT NOTE: The predicate filter does not execute atomically with the true and false filters, which may lead to inconsistent or unexpected results. Additionally, condition filters have poor performance, especially when filters are set for the false condition.
Cannot be used within the predicate_filter
, true_filter
, or false_filter
.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 190 def condition filter raise RowFilterError, "Filter type must be ConditionFilter" unless filter.instance_of? ConditionFilter add filter end |
#family(regex) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a family-name-match filter using a regular expression.
Matches only cells from columns whose families satisfy the given RE2
regex. For technical reasons, the regex must not contain the :
character, even if it is not being used as a literal.
Note that, since column families cannot contain the new line character
\n
, it is sufficient to use .
as a full wildcard when matching
column family names.
For Regex syntax:
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 327 def family regex add RowFilter.family(regex) end |
#filters ⇒ Array<SimpleFilter|ChainFilter|InterleaveFilter|ConditionFilter>
Returns a frozen copy of the filters array.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 570 def filters @filters.dup.freeze end |
#interleave(filter) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds an interleave filter.
A RowFilter that sends each row to each of several component RowFilters and interleaves the results.
The elements of "filters" all process a copy of the input row, and the results are pooled, sorted, and combined into a single output row. If multiple cells are produced with the same column and timestamp, they will all appear in the output row in an unspecified mutual order. Consider the following example, with three filters:
input row
|
-----------------------------------------------------
| | |
f(0) f(1) f(2)
| | |
1: foo,bar,10,x foo,bar,10,z far,bar,7,a
2: foo,blah,11,z far,blah,5,x far,blah,5,x
| | |
-----------------------------------------------------
|
1: foo,bar,10,z # could have switched with #2
2: foo,bar,10,x # could have switched with #1
3: foo,blah,11,z
4: far,bar,7,a
5: far,blah,5,x # identical to #6
6: far,blah,5,x # identical to #5
All interleaved filters are executed atomically.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 156 def interleave filter raise RowFilterError, "Filter type must be InterleaveFilter" unless filter.instance_of? InterleaveFilter add filter end |
#key(regex) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a row-key filter instance to match key using a regular expression.
Matches only cells from rows whose keys satisfy the given RE2 regex. In
other words, passes through the entire row when the key matches, and
otherwise produces an empty row.
Note that, since row keys can contain arbitrary bytes, the \C
escape
sequence must be used if a true wildcard is desired. The .
character
will not match the new line character \n
, which may be present in a
binary key.
For Regex syntax:
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 283 def key regex add RowFilter.key(regex) end |
#label(value) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a label filter instance to apply a label based on the result of read rows.
Applies the given label to all cells in the output row. This allows the client to determine which results were produced from which part of the filter.
Values must be at most 15 characters in length, and match the RE2
pattern [a-z0-9\\-]+
Due to a technical limitation, it is not possible to apply
multiple labels to a cell. As a result, a Chain may have no more than
one sub-filter which contains a apply_label_transformer
. It is okay for
an Interleave to contain multiple apply_label_transformers
, as they
will be applied to separate copies of the input.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 404 def label value add RowFilter.label(value) end |
#length ⇒ Integer
Returns the number of filters in the interleave.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 561 def length @filters.length end |
#pass ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a pass filter instance.
Matches all cells, regardless of input. Functionally equivalent to
leaving filter
unset, but included for completeness.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 208 def pass add RowFilter.pass end |
#qualifier(regex) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a column-qualifier-match filter using a regular expression.
Matches only cells from columns whose qualifiers satisfy the given RE2
regex.
Note that, since column qualifiers can contain arbitrary bytes, the \C
escape sequence must be used if a true wildcard is desired. The .
character will not match the new line character \n
, which may be
present in a binary qualifier.
For Regex syntax:
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 352 def qualifier regex add RowFilter.qualifier(regex) end |
#sample(probability) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a sample-probability filter instance.
Matches all cells from a row with probability p, and matches no cells from the row with probability 1-p.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 302 def sample probability add RowFilter.sample(probability) end |
#sink ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a sink filter instance.
Outputs all cells directly to the output of the read rather than to any parent filter.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 241 def sink add RowFilter.sink end |
#strip_value ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a strip-value filter instance.
Replaces each cell's value with an empty string.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 257 def strip_value add RowFilter.strip_value end |
#timestamp_range(from: nil, to: nil) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a timestamp-range filter instance.
Matches only cells with timestamps within the given range. Specifies a contiguous range of timestamps.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 489 def from: nil, to: nil add RowFilter.(from: from, to: to) end |
#value(regex) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a value-match filter using a regular expression.
Matches only cells with values that satisfy the given regular expression.
Note that, since cell values can contain arbitrary bytes, the \C
escape
sequence must be used if a true wildcard is desired. The .
character
will not match the new line character \n
, which may be present in a
binary value.
For Regex syntax:
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 376 def value regex add RowFilter.value(regex) end |
#value_range(range) ⇒ Google::Cloud::Bigtable::RowFilter::InterleaveFilter
Adds a value-range filter instance.
Matches only cells with values that fall within the given range.
See ValueRange#from and { Google::Cloud::Bigtable::ValueRange#to} for range option inclusive/exclusive options.
- The value at which to start the range. If neither field is set, interpreted as an empty string, inclusive.
- The value at which to end the range. If neither field is set, interpreted as an infinite string, exclusive.
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# File 'lib/google/cloud/bigtable/row_filter/interleave_filter.rb', line 527 def value_range range add RowFilter.value_range(range) end |