Package org.apache.drill.exec.store.mock

package org.apache.drill.exec.store.mock

Defines a mock data source which generates dummy test data for use in testing. The data source operates in two modes:

• Classic: used in physical plans in many unit tests. The plan specifies a set of columns; data is generated by the vectors themselves based on two alternating values.
• Enhanced: available for use in newer unit tests. Enhances the physical plan description to allow specifying a data generator class (for various types, data formats, etc.) Also provides a data storage engine framework to allow using mock tables in SQL queries.

Classic Mode

Create a scan operator that looks like the following (from /src/test/resources/functions/cast/two_way_implicit_cast.json, used in TestReverseImplicitCast):

    graph:[
        {

Related Packages

Package	Description
org.apache.drill.exec.store

Class	Description
AbstractFieldGen
BooleanGen
ColumnDef	Defines a column for the "enhanced" version of the mock data source.
DateGen	Very simple date value generator that produces ISO dates uniformly distributed over the last year.
DoubleGen	Generates random field values uniformly distributed over the range +-1 million, with any number of digits past the decimal point.
ExtendedMockBatchReader	Extended form of the mock record reader that uses generator class instances to create the mock values.
FieldGen	Interface which all mock column data generators must implement.
IntGen	Generates integer values uniformly randomly distributed over the entire 32-bit integer range from Integer.MIN_VALUE to Integer.MAX_VALUE.
MockBreakageStorage
MockBreakageStorage.MockBreakageStorageEngineConfig	Each storage plugin requires a unique config class to allow config --> impl lookups to be unique.
MockGroupScanPOP	Describes a "group" scan of a (logical) mock table.
MockRecordReader
MockScanBatchCreator
MockStorageEngine
MockStorageEngineConfig
MockStorePOP
MockSubScanPOP	Describes a physical scan operation for the mock data source.
MockTableDef	Structure of a mock table definition file.
MockTableDef.MockColumn	Meta-data description of the columns we wish to create during a simulated scan.
MockTableDef.MockScanEntry	Describes one simulated file (or block) within the logical file scan described by this group scan.
MockTableDef.MockTableSelection	A tiny wrapper class to add required DrillTableSelection behaviour to the entries list.
MoneyGen	Generates a mock money field as a double over the range 0 to 1 million.
StringGen	Generates a mock string field of the given length.
VaryingStringGen