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Google Cloud Bigtable C++ Client
2.7.0
A C++ Client Library for Google Cloud Bigtable
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Define the interfaces to create filter expressions. More...
#include <google/cloud/bigtable/filters.h>
Public Member Functions | |
| Filter (::google::bigtable::v2::RowFilter rhs) | |
| Filter (Filter &&)=default | |
| Filter & | operator= (Filter &&)=default |
| Filter (Filter const &)=default | |
| Filter & | operator= (Filter const &)=default |
| ::google::bigtable::v2::RowFilter const & | as_proto () const & |
| Return the filter expression as a protobuf. More... | |
| ::google::bigtable::v2::RowFilter && | as_proto () && |
| Move out the underlying protobuf value. More... | |
Static Public Member Functions | |
| static Filter | PassAllFilter () |
| Return a filter that passes on all data. More... | |
| static Filter | BlockAllFilter () |
| Return a filter that blocks all data. More... | |
| static Filter | Latest (std::int32_t n) |
Return a filter that accepts only the last n values of each column. More... | |
| static Filter | FamilyRegex (std::string pattern) |
| Return a filter that matches column families matching the given regexp. More... | |
| static Filter | ColumnRegex (std::string pattern) |
| Return a filter that accepts only columns matching the given regexp. More... | |
| static Filter | ColumnRange (std::string family, std::string start, std::string end) |
Return a filter that accepts columns in the range [start, end) within the family column family. More... | |
| static Filter | ColumnName (std::string family, std::string column) |
Return the filter that accepts the named column within the family column family. More... | |
| static Filter | TimestampRangeMicros (std::int64_t start, std::int64_t end) |
Return a filter that accepts cells with timestamps in the range [start, end). More... | |
| template<typename Rep1 , typename Period1 , typename Rep2 , typename Period2 > | |
| static Filter | TimestampRange (std::chrono::duration< Rep1, Period1 > start, std::chrono::duration< Rep2, Period2 > end) |
Return a filter that accepts cells with timestamps in the range [start, end). More... | |
| static Filter | RowKeysRegex (std::string pattern) |
| Return a filter that matches keys matching the given regexp. More... | |
| static Filter | ValueRegex (std::string pattern) |
| Return a filter that matches cells with values matching the given regexp. More... | |
| static Filter | ValueRange (std::string start, std::string end) |
Return filter matching values in the range [start, end). More... | |
| static Filter | CellsRowLimit (std::int32_t n) |
Return a filter that only accepts the first n cells in a row. More... | |
| static Filter | CellsRowOffset (std::int32_t n) |
Return a filter that skips the first n cells in a row. More... | |
| static Filter | RowSample (double probability) |
| Return a filter that samples rows with a given probability. More... | |
| static Filter | StripValueTransformer () |
| Return a filter that transforms any values into the empty string. More... | |
| static Filter | ApplyLabelTransformer (std::string label) |
| Returns a filter that applies a label to each value. More... | |
Less common range filters. | |
Cloud Bigtable range filters can include or exclude the limits of the range. In most cases applications use [ | |
| static Filter | ValueRangeLeftOpen (std::string start, std::string end) |
Return a filter that accepts values in the range [start, end). More... | |
| static Filter | ValueRangeRightOpen (std::string start, std::string end) |
Return a filter that accepts values in the range [start, end]. More... | |
| static Filter | ValueRangeClosed (std::string start, std::string end) |
Return a filter that accepts values in the range [start, end]. More... | |
| static Filter | ValueRangeOpen (std::string start, std::string end) |
Return a filter that accepts values in the range (start, end). More... | |
| static Filter | ColumnRangeRightOpen (std::string column_family, std::string start, std::string end) |
Return a filter that accepts columns in the range [start, end) within the column_family. More... | |
| static Filter | ColumnRangeLeftOpen (std::string column_family, std::string start, std::string end) |
Return a filter that accepts columns in the range (start, end] within the column_family. More... | |
| static Filter | ColumnRangeClosed (std::string column_family, std::string start, std::string end) |
Return a filter that accepts columns in the range [start, end] within the column_family. More... | |
| static Filter | ColumnRangeOpen (std::string column_family, std::string start, std::string end) |
Return a filter that accepts columns in the range (start, end) within the column_family. More... | |
Compound filters. | |
These filters compose several filters to build complex filter expressions. | |
| static Filter | Condition (Filter predicate, Filter true_filter, Filter false_filter) |
| Returns a per-row conditional filter expression. More... | |
| template<typename... FilterTypes> | |
| static Filter | Chain (FilterTypes &&... stages) |
| Return a chain filter. More... | |
| template<typename Iterator > | |
| static Filter | ChainFromRange (Iterator begin, Iterator end) |
| Return a chain filter. More... | |
| template<typename... FilterTypes> | |
| static Filter | Interleave (FilterTypes &&... streams) |
| Return a filter that interleaves the results of many other filters. More... | |
| template<typename Iterator > | |
| static Filter | InterleaveFromRange (Iterator begin, Iterator end) |
| Return a filter that interleaves the results of a range of filters. More... | |
| static Filter | Sink () |
| Return a filter that outputs all cells ignoring intermediate filters. More... | |
Friends | |
| bool | operator== (Filter const &a, Filter const &b) noexcept |
| bool | operator!= (Filter const &a, Filter const &b) noexcept |
Define the interfaces to create filter expressions.
Example:
Those filters that use regular expressions, expect the patterns to be in the RE2 syntax.
\C escape sequence must be used if a true wildcard is desired. The . character will not match the new line character \n, because . means [^\n] in RE2. As new line characters may be present in a binary value, you may need to explicitly match it using "\\n". The double escape is necessary because RE2 needs to get the escape sequence.
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Returns a filter that applies a label to each value.
Each value accepted by previous filters in modified to include the label.
| label | the label applied to each cell. The labels must be at most 15 characters long, and must match the [a-z0-9\\-]+ pattern. The server validates the filter and will return a grpc::StatusCode::INVALID_ARGUMENT if the label does not meet these requirements. This function makes no attempt to validate the label parameter before sending it to the server. |
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Return a filter that only accepts the first n cells in a row.
Note that cells might be repeated, such as when interleaving the results of multiple filters via the Interleave() function. Furthermore, this filter apples to the cells within a row; if there are multiple column families and/or columns in a row, the order is:
The server rejects filters where n <= 0, any ReadRows() request containing such a filter fails with grpc::StatusCode::INVALID_ARGUMENT. This function does not perform any local validation of n.
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Return a filter that skips the first n cells in a row.
Note that cells might be repeated, such as when interleaving the results of multiple filters via the Interleave() function. Furthermore, this filter apples to the cells within a row; if there are multiple column families and/or columns in a row, the order is:
The server rejects filters where n <= 0, any ReadRows() request containing such a filter fails with grpc::StatusCode::INVALID_ARGUMENT. This function does not perform any local validation of n.
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Return a chain filter.
The filter returned by this function acts like a pipeline. The output row from each stage is passed on as input for the next stage.
| FilterTypes | the type of the filter arguments. They must all be convertible to Filter. |
| stages | the filter stages. The filter must contain at least two stages. The server validates each stage, and will reject them as described in their corresponding function. The server may also impose additional restrictions on the composition of the Chain. This function makes no attempt at validating the stages locally, the Chain filter is sent as-is it to the server. |
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Return a chain filter.
The filter returned by this function acts like a pipeline. The output row from each stage is passed on as input for the next stage.
| Iterator | an InputIterator whose value_type is Filter. |
| begin | the start of the range. |
| end | the end of the range. |
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Return a filter that accepts columns in the range [start, end) within the family column family.
The column range must be non-empty, i.e., start must be strictly smaller than end. The server will reject empty ranges with a grpc::StatusCode::INVALID_ARGUMENT status code. This function makes no attempt to validate the column family or column range before sending them to the server.
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Return a filter that accepts columns in the range [start, end] within the column_family.
The range must be non-empty. The server will reject empty ranges with a grpc::StatusCode::INVALID_ARGUMENT error. This function makes no attempt to validate the timestamp range before sending it to the server.
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Return a filter that accepts columns in the range (start, end] within the column_family.
The range must be non-empty. The server will reject empty ranges with a grpc::StatusCode::INVALID_ARGUMENT error. This function makes no attempt to validate the timestamp range before sending it to the server.
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inlinestatic |
Return a filter that accepts columns in the range (start, end) within the column_family.
The range must be non-empty. The server will reject empty ranges with a grpc::StatusCode::INVALID_ARGUMENT error. This function makes no attempt to validate the timestamp range before sending it to the server.
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inlinestatic |
Return a filter that accepts columns in the range [start, end) within the column_family.
The range must be non-empty. The server will reject empty ranges with a grpc::StatusCode::INVALID_ARGUMENT error. This function makes no attempt to validate the timestamp range before sending it to the server.
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Return a filter that accepts only columns matching the given regexp.
| pattern | the regular expression. It must be a valid RE2 pattern. The server rejects filters with an invalid pattern with a grpc::StatusCode::INVALID_ARGUMENT status code. This function makes no attempt to validate the pattern before sending it to the server. |
\C escape sequence must be used if a true wildcard is desired. The . character will not match the new line character \n, because . means [^\n] in RE2. As new line characters may be present in a binary value, you may need to explicitly match it using "\\n". The double escape is necessary because RE2 needs to get the escape sequence.
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Returns a per-row conditional filter expression.
For each row the predicate filter is evaluated, if it returns any cells, then the cells returned by true_filter are returned, otherwise the cells from false_filter are returned.
The server validates the tree of filters, and rejects them if any contain invalid values. The server may impose additional restrictions on the resulting collection of filters. This function makes no attempt to validate the input before sending it to the server.
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Return a filter that matches column families matching the given regexp.
| pattern | the regular expression. It must be a valid RE2 pattern. For technical reasons, the regex must not contain the ':' character, even if it is not being used as a literal. The server rejects filters with invalid patterns, including patterns containing the ':' character. The server fails the ReadRows() request with a grpc::StatusCode::INVALID_ARGUMENT status code. This function makes no attempt to validate the pattern before sending it to the server. |
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Return a filter that interleaves the results of many other filters.
This filter executes each stream in parallel and then merges the results by interleaving the output from each stream. The proto file has a nice illustration in the documentation of google.bigtable.v2.RowFilter.Interleave.
In brief, if the input cells are c1, c2, c3, ..., and you have three subfilters S1, S2, and S3, the output of Interleave(S1, S2, S3) is: S1(c1), S2(c1), S3(c1), S1(d2), S2(d2), S3(c2), S1(c3), S2(c3), S3(c2), ... where some of the Si(c_j) values may be empty if the filter discards the cell altogether.
| FilterTypes | the type of the filter arguments. They must all be convertible for Filter. |
| streams | the filters to interleave. The filter must contain at least two streams. The server validates each stream, and will reject them as described in their corresponding function. The server may also impose additional restrictions on the overall composition of the Interleave filter. This function makes no attempt at validating the streams locally, the Interleave filter is sent as-is to the server. |
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Return a filter that interleaves the results of a range of filters.
Similar to Interleave(), except this function accepts a pair of Iterators.
| begin | the begin iterator of the range. |
| end | the end iterator of the range. |
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Return a filter that accepts only the last n values of each column.
The server rejects filters where n <= 0, any ReadRows() request containing such a filter fails with grpc::StatusCode::INVALID_ARGUMENT. This function does not perform any local validation of n.
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Return a filter that matches keys matching the given regexp.
| pattern | the regular expression. It must be a valid RE2 pattern. More details at https://github.com/google/re2/wiki/Syntax |
\C escape sequence must be used if a true wildcard is desired. The . character will not match the new line character \n, because . means [^\n] in RE2. As new line characters may be present in a binary value, you may need to explicitly match it using "\\n". The double escape is necessary because RE2 needs to get the escape sequence.
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Return a filter that samples rows with a given probability.
The server rejects filters where probability is outside the range (0.0, 1.0). Any ReadRows() request containing such a filter fails with grpc::StatusCode::INVALID_ARGUMENT. This function does not perform any local validation of probability.
| probability | the probability that any row will be selected. It must be in the range (0.0, 1.0). |
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Return a filter that outputs all cells ignoring intermediate filters.
Please read the documentation in the proto file for a detailed description. In short, this is an advanced filter to facilitate debugging. You can explore the intermediate results of a complex filter expression by injecting a filter of this type.
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Return a filter that accepts cells with timestamps in the range [start, end).
The function accepts any instantiation of std::chrono::duration<> for the start and end parameters. For example:
The timestamp range must be non-empty, i.e. start must be strictly smaller than end. The server will reject empty ranges with a grpc::StatusCode::INVALID_ARGUMENT error. This function makes no attempt to validate the timestamp range before sending it to the server.
| Rep1 | a placeholder to match the Rep tparam for start type, the semantics of this template parameter are documented in std::chrono::duration<> (in brief, the underlying arithmetic type used to store the number of ticks), for our purposes it is simply a formal parameter. |
| Rep2 | similar formal parameter for the type of end. |
| Period1 | a placeholder to match the Period tparam for start type, the semantics of this template parameter are documented in std::chrono::duration<> (in brief, the length of the tick in seconds, expressed as a std::ratio<>), for our purposes it is simply a formal parameter. |
| Period2 | similar formal parameter for the type of end. |
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inlinestatic |
Return a filter that accepts cells with timestamps in the range [start, end).
The timestamp range must be non-empty, i.e. start must be strictly smaller than end. The server will reject empty ranges with a grpc::StatusCode::INVALID_ARGUMENT status code. This function makes no attempt to validate the timestamp range before sending it to the server.
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Return filter matching values in the range [start, end).
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inlinestatic |
Return a filter that accepts values in the range [start, end].
The range must be non-empty. The server will reject empty ranges with a grpc::StatusCode::INVALID_ARGUMENT error. This function makes no attempt to validate the timestamp range before sending it to the server.
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inlinestatic |
Return a filter that accepts values in the range [start, end).
The range must be non-empty. The server will reject empty ranges with a grpc::StatusCode::INVALID_ARGUMENT error. This function makes no attempt to validate the timestamp range before sending it to the server.
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inlinestatic |
Return a filter that accepts values in the range (start, end).
The range must be non-empty. The server will reject empty ranges with a grpc::StatusCode::INVALID_ARGUMENT error. This function makes no attempt to validate the timestamp range before sending it to the server.
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inlinestatic |
Return a filter that accepts values in the range [start, end].
The range must be non-empty. The server will reject empty ranges with a grpc::StatusCode::INVALID_ARGUMENT error. This function makes no attempt to validate the timestamp range before sending it to the server.
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inlinestatic |
Return a filter that matches cells with values matching the given regexp.
| pattern | the regular expression. It must be a valid RE2 pattern. The server rejects filters with an invalid pattern with a grpc::StatusCode::INVALID_ARGUMENT status code. This function makes no attempt to validate the timestamp range before sending it to the server. |
\C escape sequence must be used if a true wildcard is desired. The . character will not match the new line character \n, because . means [^\n] in RE2. As new line characters may be present in a binary value, you may need to explicitly match it using "\\n". The double escape is necessary because RE2 needs to get the escape sequence. 1.9.1