Package org.apache.calcite.rel.rel2sql

Class SqlImplementor.Context

java.lang.Object

org.apache.calcite.rel.rel2sql.SqlImplementor.Context

Direct Known Subclasses:

SqlImplementor.BaseContext, SqlImplementor.SimpleContext

Enclosing class:

SqlImplementor

public abstract static class SqlImplementor.Context
extends java.lang.Object

Context for translating a RexNode expression (within a RelNode) into a SqlNode expression (within a SQL parse tree).

Field Summary

Fields

Modifier and Type	Field	Description
(package private) SqlDialect	dialect
(package private) int	fieldCount
private boolean	ignoreCast

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Context(SqlDialect dialect, int fieldCount)
protected	Context(SqlDialect dialect, int fieldCount, boolean ignoreCast)

Method Summary

Modifier and Type	Method	Description
(package private) void	addOrderItem(java.util.List<SqlNode> orderByList, RelFieldCollation field)
private SqlNode	createLeftCall(SqlOperator op, java.util.List<SqlNode> nodeList)
private SqlCall	createOverCall(SqlAggFunction op, java.util.List<SqlNode> operands, SqlWindow window)
private SqlNode	createSqlWindowBound(RexWindowBound rexWindowBound)
abstract SqlNode	field(int ordinal)
java.util.List<SqlNode>	fieldList()
protected SqlImplementor.Context	getAliasContext(RexCorrelVariable variable)
SqlImplementor	implementor()
SqlNode	toSql(AggregateCall aggCall)	Converts a call to an aggregate function to an expression.
SqlNode	toSql(RelFieldCollation collation)	Converts a collation to an ORDER BY item.
private java.util.List<SqlNode>	toSql(RexProgram program, java.util.List<RexNode> operandList)
private SqlNode	toSql(RexProgram program, RexFieldCollation rfc)
SqlNode	toSql(RexProgram program, RexNode rex)	Converts an expression from RexNode to SqlNode format.
private SqlCall	toSql(RexProgram program, RexOver rexOver)
private SqlNode	withOrder(SqlCall call, SqlNodeList orderList)	Wraps a call in a SqlKind.WITHIN_GROUP call, if orderList is non-empty.

Methods inherited from class java.lang.Object

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

Field Detail

dialect

final SqlDialect dialect

fieldCount

final int fieldCount

ignoreCast

private final boolean ignoreCast

Constructor Detail

Context

protected Context(SqlDialect dialect,
                  int fieldCount)

Context

protected Context(SqlDialect dialect,
                  int fieldCount,
                  boolean ignoreCast)

Method Detail

field

public abstract SqlNode field(int ordinal)

toSql

public SqlNode toSql(RexProgram program,
                     RexNode rex)

Converts an expression from RexNode to SqlNode format.

Parameters:

program - Required only if rex contains RexLocalRef

rex - Expression to convert

getAliasContext

protected SqlImplementor.Context getAliasContext(RexCorrelVariable variable)

toSql

private SqlCall toSql(RexProgram program,
                      RexOver rexOver)

createOverCall

private SqlCall createOverCall(SqlAggFunction op,
                               java.util.List<SqlNode> operands,
                               SqlWindow window)

toSql

private SqlNode toSql(RexProgram program,
                      RexFieldCollation rfc)

createSqlWindowBound

private SqlNode createSqlWindowBound(RexWindowBound rexWindowBound)

createLeftCall

private SqlNode createLeftCall(SqlOperator op,
                               java.util.List<SqlNode> nodeList)

toSql

private java.util.List<SqlNode> toSql(RexProgram program,
                                      java.util.List<RexNode> operandList)

fieldList

public java.util.List<SqlNode> fieldList()

addOrderItem

void addOrderItem(java.util.List<SqlNode> orderByList,
                  RelFieldCollation field)

toSql

public SqlNode toSql(AggregateCall aggCall)

Converts a call to an aggregate function to an expression.

withOrder

private SqlNode withOrder(SqlCall call,
                          SqlNodeList orderList)

Wraps a call in a SqlKind.WITHIN_GROUP call, if orderList is non-empty.

toSql

public SqlNode toSql(RelFieldCollation collation)

Converts a collation to an ORDER BY item.

implementor

public SqlImplementor implementor()