groupInDB

Documentation

Overview

Package groupInDB is the implementation of the group stage that runs in database.

Index

• func BaseComputation(options *group.Options) *expr.Pipeline
• func ComputeStats(p *expr.Pipeline, groupOptions *group.Options, ...)
• func ConvertDateToTimezone(date interface{}, location *time.Location) interface{}
• func DateHourHistogram(location *time.Location) *expr.Pipeline
• func DateWeekdayHistogram(location *time.Location) *expr.Pipeline
• func GroupStats(p *expr.Pipeline, groupOptions *group.Options)
• func GroupValues(p *expr.Pipeline, options *group.Options)
• func LengthExtremesComputation(options *group.Options) *expr.Pipeline
• func LengthsHistogram(options *group.Options) *expr.Pipeline
• func NewStage(groupOptions *group.Options) *analysis.Stage
• func ValueExtremesComputation(options *group.Options) *expr.Pipeline
• func ValueFreqComputation(options *group.Options) *expr.Pipeline
• func ValuesHistogram(options *group.Options) *expr.Pipeline

Functions

func BaseComputation

func BaseComputation(options *group.Options) *expr.Pipeline

BaseComputation generates operations for compute base statistics. Example results:

[
	{
		ID: {
			FIELD_NAME: "name"
			FIELD_TYPE: "string",
			STAT_TYPE: BASE_STATS,
		}
		COUNT: 5
		...
	},
	...
]

func ComputeStats

func ComputeStats(p *expr.Pipeline, groupOptions *group.Options, analysisOptions *analysis.Options)

ComputeStats generates pipeline that compute stats of values and lengths. Example results:

[
	{
		ID: {
			FIELD_NAME: "name"
			FIELD_TYPE: "string",
			STAT_TYPE: BASE_STATS,
		}
		COUNT: 5
		...
	},
	...
]

func ConvertDateToTimezone

func ConvertDateToTimezone(date interface{}, location *time.Location) interface{}

ConvertDateToTimezone converts date to desired timezone

func DateHourHistogram

func DateHourHistogram(location *time.Location) *expr.Pipeline

DateHourHistogram returns hour histogram histogram calculation pipeline.

func DateWeekdayHistogram

func DateWeekdayHistogram(location *time.Location) *expr.Pipeline

DateWeekdayHistogram returns weekday histogram calculation pipeline.

func GroupStats

func GroupStats(p *expr.Pipeline, groupOptions *group.Options)

GroupStats computes stats of values and lengths. Example results:

[
	{
		FIELD_NAME: "name"
		FIELD_TYPE: "string",
		COUNT: 5
		VALUE_HISTOGRAM: ...
		...
	},
	...
]

func GroupValues

func GroupValues(p *expr.Pipeline, options *group.Options)

GroupValues from expand stage by name and type. Example results:

	[
		{
			FIELD_NAME: "name"
			FIELD_TYPE: "string",
                     ALL_VALUES: [
				{
					VALUE: "Michael",
					LENGTH: 7,
				},
				{
					VALUE: "Mike",
					LENGTH: 4,
				},
                             ...
                     ]
		},
		...
	]

func LengthExtremesComputation

func LengthExtremesComputation(options *group.Options) *expr.Pipeline

LengthExtremesComputation adds length extremes computation to aggregation pipeline Example results:

[
	{
		ID: {
			FIELD_NAME: "name"
			FIELD_TYPE: "string",
			STAT_TYPE: LENGTH_EXTREMES,
		}
		MIN_LENGTH: 2,
		MAX_LENGTH: 5,
		AVG_LENGTH: 2.45,
		...
	},
	...
]

func LengthsHistogram

func LengthsHistogram(options *group.Options) *expr.Pipeline

LengthsHistogram adds lengths histogram calculation to aggregation pipeline.

func NewStage

func NewStage(groupOptions *group.Options) *analysis.Stage

NewStage - GroupInDB stage factory

func ValueExtremesComputation

func ValueExtremesComputation(options *group.Options) *expr.Pipeline

ValueExtremesComputation generates pipeline to compute min, max and avg value. Example results:

[
	{
		ID: {
			FIELD_NAME: "name"
			FIELD_TYPE: "string",
			STAT_TYPE: VALUE_EXTREMES,
		}
		MIN_VALUE: "abc",
		MAX_VALUE: "NKLXYZ",
		AVG_VALUE: nil,
		...
	},
	...
]

func ValueFreqComputation

func ValueFreqComputation(options *group.Options) *expr.Pipeline

ValueFreqComputation generates pipeline that compute most and least frequent values. Example results:

[
	{
		ID: {
			FIELD_NAME: "name"
			FIELD_TYPE: "string",
			STAT_TYPE: VALUE_FREQ_STATS,
		}
		COUNT_UNIQUE: 4,
		TOP_N_VALUES: ...
		BOTTOM_N_VALUES: ...
	},
	...
]

func ValuesHistogram

func ValuesHistogram(options *group.Options) *expr.Pipeline

ValuesHistogram returns lengths histogram calculation pipeline.