Package com.amazonaws.athena.connectors.google.bigquery

Class BigQueryFederationExpressionParser

java.lang.Object

com.amazonaws.athena.connectors.jdbc.manager.FederationExpressionParser

com.amazonaws.athena.connectors.google.bigquery.BigQueryFederationExpressionParser

public class BigQueryFederationExpressionParser
extends FederationExpressionParser

Based on com.amazonaws.athena.connectors.jdbc.manager.JdbcFederationExpressionParser class

Constructor Summary

Constructors

Constructor	Description
BigQueryFederationExpressionParser()

Method Summary

Modifier and Type	Method	Description
String	mapFunctionToDataSourceSyntax(FunctionName functionName, org.apache.arrow.vector.types.pojo.ArrowType type, List<String> arguments)	Each datasource has different syntax for various operations, quotes, etc.
List<String>	parseComplexExpressions(List<org.apache.arrow.vector.types.pojo.Field> columns, Constraints constraints)
String	parseConstantExpression(ConstantExpression constantExpression)
String	parseFunctionCallExpression(FunctionCallExpression functionCallExpression)	This is a recursive function, as function calls can have arguments which, themselves, are function calls.
String	writeArrayConstructorClause(org.apache.arrow.vector.types.pojo.ArrowType type, List<String> arguments)

Methods inherited from class com.amazonaws.athena.connectors.jdbc.manager.FederationExpressionParser

parseComplexExpressions, parseConstantExpression, parseFunctionCallExpression, parseVariableExpression

Methods inherited from class java.lang.Object

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

Constructor Detail

BigQueryFederationExpressionParser

public BigQueryFederationExpressionParser()

Method Detail

writeArrayConstructorClause

public String writeArrayConstructorClause(org.apache.arrow.vector.types.pojo.ArrowType type,
                                          List<String> arguments)

parseComplexExpressions

public List<String> parseComplexExpressions(List<org.apache.arrow.vector.types.pojo.Field> columns,
                                            Constraints constraints)

parseFunctionCallExpression

public String parseFunctionCallExpression(FunctionCallExpression functionCallExpression)

This is a recursive function, as function calls can have arguments which, themselves, are function calls.

Parameters:

functionCallExpression -

Returns:

parseConstantExpression

public String parseConstantExpression(ConstantExpression constantExpression)

mapFunctionToDataSourceSyntax

public String mapFunctionToDataSourceSyntax(FunctionName functionName,
                                            org.apache.arrow.vector.types.pojo.ArrowType type,
                                            List<String> arguments)

Description copied from class: FederationExpressionParser

Each datasource has different syntax for various operations, quotes, etc. This is the only method a subclass to implement, and otherwise will just invoke parseComplexExpressions.

Specified by:

mapFunctionToDataSourceSyntax in class FederationExpressionParser