Package io.squashql.query.database

Class DuckDBQueryEngine

java.lang.Object

io.squashql.query.database.AQueryEngine<T>

io.squashql.jdbc.JdbcQueryEngine<DuckDBDatastore>

io.squashql.query.database.DuckDBQueryEngine

All Implemented Interfaces:

QueryEngine<DuckDBDatastore>

public class DuckDBQueryEngine
extends JdbcQueryEngine<DuckDBDatastore>

Nested Class Summary

Nested classes/interfaces inherited from class io.squashql.jdbc.JdbcQueryEngine

JdbcQueryEngine.ThrowingFunction<T extends Object,R extends Object>

Field Summary

Fields

Modifier and Type	Field	Description
static final List<String>	SUPPORTED_AGGREGATION_FUNCTIONS	https://duckdb.org/docs/sql/aggregates.

Fields inherited from class io.squashql.query.database.AQueryEngine

datastore

Fields inherited from interface io.squashql.query.database.QueryEngine

GRAND_TOTAL, TOTAL

Constructor Summary

Constructors

Constructor	Description
DuckDBQueryEngine(DuckDBDatastore datastore)

Method Summary

Modifier and Type	Method	Description
QueryRewriter	queryRewriter(DatabaseQuery query)
List<String>	supportedAggregationFunctions()
protected BiFunction<ResultSetMetaData,Integer,Class<?>>	typeToClassConverter()

Methods inherited from class io.squashql.jdbc.JdbcQueryEngine

createHeaderList, createResultSetReader, execute, executeQuery, executeRawSql, executeSql, getColumnTypes, getTypeValue, retrieveAggregates

Methods inherited from class io.squashql.query.database.AQueryEngine

createSqlStatement, datastore, execute, transformToColumnFormat, transformToRowFormat

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

SUPPORTED_AGGREGATION_FUNCTIONS

public static final List<String> SUPPORTED_AGGREGATION_FUNCTIONS

https://duckdb.org/docs/sql/aggregates. NOTE there is more but only a subset is proposed here.

Constructor Details

DuckDBQueryEngine

public DuckDBQueryEngine(DuckDBDatastore datastore)

Method Details

typeToClassConverter

protected BiFunction<ResultSetMetaData,Integer,Class<?>> typeToClassConverter()

Specified by:

typeToClassConverter in class JdbcQueryEngine<DuckDBDatastore>

supportedAggregationFunctions

public List<String> supportedAggregationFunctions()

queryRewriter

public QueryRewriter queryRewriter(DatabaseQuery query)