org.apache.calcite.rel.rel2sql

Class RelToSqlConverter

java.lang.Object

org.apache.calcite.rel.rel2sql.SqlImplementor

org.apache.calcite.rel.rel2sql.RelToSqlConverter

All Implemented Interfaces:

ReflectiveVisitor

Direct Known Subclasses:

JdbcImplementor

public class RelToSqlConverter
extends SqlImplementor
implements ReflectiveVisitor

Utility to convert relational expressions to SQL abstract syntax tree.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	RelToSqlConverter.Frame Stack frame.

Nested classes/interfaces inherited from class org.apache.calcite.rel.rel2sql.SqlImplementor

SqlImplementor.AliasContext, SqlImplementor.Builder, SqlImplementor.Clause, SqlImplementor.Context, SqlImplementor.JoinContext, SqlImplementor.MatchRecognizeContext, SqlImplementor.Result

Field Summary

Fields

Modifier and Type	Field and Description
private static SqlRowOperator	ANONYMOUS_ROW Similar to SqlStdOperatorTable.ROW, but does not print "ROW".
private ReflectUtil.MethodDispatcher<SqlImplementor.Result>	dispatcher
private Deque<RelToSqlConverter.Frame>	stack

Fields inherited from class org.apache.calcite.rel.rel2sql.SqlImplementor

aliasSet, correlTableMap, dialect, ordinalMap, POS

Constructor Summary

Constructors

Constructor and Description
RelToSqlConverter(SqlDialect dialect) Creates a RelToSqlConverter.

Method Summary

Modifier and Type	Method and Description
void	addSelect(List<SqlNode> selectList, SqlNode node, RelDataType rowType)
private SqlCall	as(SqlNode e, String alias)
protected SqlImplementor.Result	dispatch(RelNode e) Dispatches a call to the visit(Xxx e) method where Xxx most closely matches the runtime type of the argument.
private SqlNodeList	exprList(SqlImplementor.Context context, List<? extends RexNode> exprs) Converts a list of RexNode expressions to SqlNode expressions.
private SqlNodeList	identifierList(List<String> names) Converts a list of names expressions to a list of single-part SqlIdentifiers.
private void	parseCorrelTable(RelNode relNode, SqlImplementor.Result x)
SqlImplementor.Result	visit(Aggregate e)
SqlImplementor.Result	visit(Calc e)
SqlImplementor.Result	visit(Filter e)
SqlImplementor.Result	visit(Intersect e)
SqlImplementor.Result	visit(Join e)
SqlImplementor.Result	visit(Match e)
SqlImplementor.Result	visit(Minus e)
SqlImplementor.Result	visit(Project e)
SqlImplementor.Result	visit(RelNode e)
SqlImplementor.Result	visit(Sort e)
SqlImplementor.Result	visit(TableModify modify)
SqlImplementor.Result	visit(TableScan e)
SqlImplementor.Result	visit(Union e)
SqlImplementor.Result	visit(Values e)
SqlImplementor.Result	visitChild(int i, RelNode e)

Methods inherited from class org.apache.calcite.rel.rel2sql.SqlImplementor

aliasContext, convertConditionToSqlNode, isStar, isStar, joinContext, joinType, matchRecognizeContext, result, result, setOpToSql, wrapSelect

Methods inherited from class java.lang.Object

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

Field Detail

ANONYMOUS_ROW

private static final SqlRowOperator ANONYMOUS_ROW

Similar to SqlStdOperatorTable.ROW, but does not print "ROW".

dispatcher

private final ReflectUtil.MethodDispatcher<SqlImplementor.Result> dispatcher

stack

private final Deque<RelToSqlConverter.Frame> stack

Constructor Detail

RelToSqlConverter

public RelToSqlConverter(SqlDialect dialect)

Creates a RelToSqlConverter.

Method Detail

dispatch

protected SqlImplementor.Result dispatch(RelNode e)

Dispatches a call to the visit(Xxx e) method where Xxx most closely matches the runtime type of the argument.

visitChild

public SqlImplementor.Result visitChild(int i,
                                        RelNode e)

Specified by:

visitChild in class SqlImplementor

visit

public SqlImplementor.Result visit(RelNode e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

visit

public SqlImplementor.Result visit(Join e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

visit

public SqlImplementor.Result visit(Filter e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

visit

public SqlImplementor.Result visit(Project e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

visit

public SqlImplementor.Result visit(Aggregate e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

visit

public SqlImplementor.Result visit(TableScan e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

visit

public SqlImplementor.Result visit(Union e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

visit

public SqlImplementor.Result visit(Intersect e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

visit

public SqlImplementor.Result visit(Minus e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

visit

public SqlImplementor.Result visit(Calc e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

visit

public SqlImplementor.Result visit(Values e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

visit

public SqlImplementor.Result visit(Sort e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

visit

public SqlImplementor.Result visit(TableModify modify)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

exprList

private SqlNodeList exprList(SqlImplementor.Context context,
                             List<? extends RexNode> exprs)

Converts a list of RexNode expressions to SqlNode expressions.

identifierList

private SqlNodeList identifierList(List<String> names)

Converts a list of names expressions to a list of single-part SqlIdentifiers.

visit

public SqlImplementor.Result visit(Match e)

See Also:

dispatch(org.apache.calcite.rel.RelNode)

as

private SqlCall as(SqlNode e,
                   String alias)

addSelect

public void addSelect(List<SqlNode> selectList,
                      SqlNode node,
                      RelDataType rowType)

Overrides:

addSelect in class SqlImplementor

parseCorrelTable

private void parseCorrelTable(RelNode relNode,
                              SqlImplementor.Result x)