Package com.exasol.adapter.request.parser

Class PushdownSqlParser

java.lang.Object

com.exasol.adapter.request.parser.PushdownSqlParser

public final class PushdownSqlParser
extends Object

Parser for the JSON query AST.

Method Summary

Modifier and Type	Method	Description
protected jakarta.json.JsonReader	createJsonReader(String rawRequest)	Create a JSON reader for raw request data.
static PushdownSqlParser	createWithTablesMetadata(List<TableMetadata> involvedTableMetadata)	Create an instance of a PushdownSqlParser
SqlNode	parseExpression(jakarta.json.JsonObject expression)	Parse an expression.
protected Map<String,String>	parseProperties(jakarta.json.JsonObject jsonSchemaMetadataInfo)	Read the properties from the schema metadata.

Methods inherited from class java.lang.Object

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

Method Detail

parseExpression

public SqlNode parseExpression(jakarta.json.JsonObject expression)

Parse an expression.

Parameters:

expression - JSON object of the SQL expression

Returns:

parsed expression

createWithTablesMetadata

public static PushdownSqlParser createWithTablesMetadata(List<TableMetadata> involvedTableMetadata)

Create an instance of a PushdownSqlParser

Parameters:

involvedTableMetadata - metadata for all tables that are referred to in the push-down request

Returns:

new instance

createJsonReader

protected jakarta.json.JsonReader createJsonReader(String rawRequest)

Create a JSON reader for raw request data.

The data stream fed into this reader must be UTF-8 encoded.

Parameters:

rawRequest - raw JSON string representing an adapter request or part thereof

Returns:

JSON reader

parseProperties

protected Map<String,String> parseProperties(jakarta.json.JsonObject jsonSchemaMetadataInfo)

Read the properties from the schema metadata.

Parameters:

jsonSchemaMetadataInfo - json schema metadata info

Returns:

parsed Properties.