Package dev.frostlake.executor.commands

Class DMLCommandHandler

java.lang.Object

dev.frostlake.executor.commands.DMLCommandHandler

All Implemented Interfaces:

CommandHandler

public class DMLCommandHandler
extends Object
implements CommandHandler

Handler for DML (Data Manipulation Language) commands: INSERT, UPDATE, DELETE, MERGE

Constructor Summary

Constructors

Constructor	Description
DMLCommandHandler(Catalog catalog, QueryExecutor queryExecutor)

Method Summary

Modifier and Type	Method	Description
Catalog	getCatalog()	Get catalog instance
QueryExecutor	getQueryExecutor()	Get query executor instance
Object	handleCopyIntoStatement(FrostlakeParser.CopyIntoStatementContext ctx)
Object	handleDeleteStatement(FrostlakeParser.DeleteStatementContext ctx)
Object	handleInsertStatement(FrostlakeParser.InsertStatementContext ctx)
Object	handleMergeStatement(FrostlakeParser.MergeStatementContext ctx)
Object	handleMultiTableInsert(FrostlakeParser.MultiTableInsertStatementContext ctx)
Object	handleUpdateStatement(FrostlakeParser.UpdateStatementContext ctx)

Methods inherited from class java.lang.Object

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

Methods inherited from interface dev.frostlake.executor.commands.CommandHandler

extractComment, extractComment, getText, getText, qualifiedNameParts

Constructor Details

DMLCommandHandler

public DMLCommandHandler(Catalog catalog,
 QueryExecutor queryExecutor)

Method Details

getCatalog

public Catalog getCatalog()

Description copied from interface: CommandHandler

Get catalog instance

Specified by:

getCatalog in interface CommandHandler

Returns:

the engine's metastore catalog, holding the objects this handler reads and mutates

getQueryExecutor

public QueryExecutor getQueryExecutor()

Description copied from interface: CommandHandler

Get query executor instance

Specified by:

getQueryExecutor in interface CommandHandler

Returns:

the engine's query executor, for handlers that run nested queries or need session state

handleInsertStatement

public Object handleInsertStatement(FrostlakeParser.InsertStatementContext ctx)

handleMultiTableInsert

public Object handleMultiTableInsert(FrostlakeParser.MultiTableInsertStatementContext ctx)

handleUpdateStatement

public Object handleUpdateStatement(FrostlakeParser.UpdateStatementContext ctx)

handleDeleteStatement

public Object handleDeleteStatement(FrostlakeParser.DeleteStatementContext ctx)

handleMergeStatement

public Object handleMergeStatement(FrostlakeParser.MergeStatementContext ctx)

handleCopyIntoStatement

public Object handleCopyIntoStatement(FrostlakeParser.CopyIntoStatementContext ctx)