object AnalyticsPartitionReader extends Logging
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- def compileFilter(filters: Array[Filter]): String
Transform the filters into a analytics sql++ where clause.
Transform the filters into a analytics sql++ where clause.
- filters
the filters to transform, which must all be supported (see partitionSupported)
- returns
the transformed raw analytics sql++ clause
- def currentMetricsValues(resultMetrics: Option[AnalyticsMetrics]): Array[CustomTaskMetric]
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Escapes the LIKE wildcards
%and_, and the escape character\, so that they match literally. - def filterToExpression(filter: Filter): Option[String]
Turns a filter into a sql++ expression.
Turns a filter into a sql++ expression.
- filter
the filter to convert
- returns
the resulting expression, or None if the filter cannot be expressed in sql++
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- def partitionSupported(filters: Array[Filter]): (Array[Filter], Array[Filter])
Splits filters into those that can be compiled to analytics SQL++, and so pushed down, and those that cannot.
Splits filters into those that can be compiled to analytics SQL++, and so pushed down, and those that cannot.
The unsupported filters must be returned to Spark from
SupportsPushDownFilters.pushFilters, so that Spark evaluates them itself after the scan.- returns
(supported, unsupported)
- def quoteString(value: String): String
Quotes a string as a JSON string literal, which is also a valid SQL++ string literal.
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- Deprecated
(Since version 9)