org.apache.ignite.internal.processors.query.h2.sql

Class GridSqlQuery

java.lang.Object

org.apache.ignite.internal.processors.query.h2.sql.GridSqlStatement

org.apache.ignite.internal.processors.query.h2.sql.GridSqlQuery

All Implemented Interfaces:

GridSqlAst

Direct Known Subclasses:

GridSqlSelect, GridSqlUnion

public abstract class GridSqlQuery
extends GridSqlStatement
implements GridSqlAst

SQL Query AST.

Field Summary

Fields

Modifier and Type	Field and Description
static int	LIMIT_CHILD
static int	OFFSET_CHILD
protected List<GridSqlSortColumn>	sort

Fields inherited from class org.apache.ignite.internal.processors.query.h2.sql.GridSqlStatement

limit

Constructor Summary

Constructors

Constructor and Description
GridSqlQuery()

Method Summary

Modifier and Type	Method and Description
void	addSort(GridSqlSortColumn sortCol)
<E extends GridSqlAst> E	child() Get the first child.
<E extends GridSqlAst> E	child(int childIdx) Get child by index.
<E extends GridSqlAst> void	child(int childIdx, E child) Set child.
void	clearSort()
protected abstract GridSqlAst	column(int col)
protected void	getSortLimitSQL(StringBuilder buff)
boolean	hasOffsetLimit() Whether offset or limit exists.
protected static <E extends GridSqlAst> E	maskNull(GridSqlAst x, GridSqlAst dflt)
GridSqlAst	offset()
void	offset(GridSqlAst offset)
GridSqlType	resultType()
abstract boolean	skipMergeTable()
List<GridSqlSortColumn>	sort()
protected abstract int	visibleColumns()

Methods inherited from class org.apache.ignite.internal.processors.query.h2.sql.GridSqlStatement

explain, explain, getSQL, limit, limit, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.ignite.internal.processors.query.h2.sql.GridSqlAst

getSQL, size

Field Detail

OFFSET_CHILD

public static final int OFFSET_CHILD

See Also:

Constant Field Values

LIMIT_CHILD

public static final int LIMIT_CHILD

See Also:

Constant Field Values

sort

protected List<GridSqlSortColumn> sort

Constructor Detail

GridSqlQuery

public GridSqlQuery()

Method Detail

offset

public GridSqlAst offset()

Returns:

Offset.

offset

public void offset(GridSqlAst offset)

Parameters:

offset - Offset.

sort

public List<GridSqlSortColumn> sort()

Returns:

Sort.

clearSort

public void clearSort()

addSort

public void addSort(GridSqlSortColumn sortCol)

Parameters:

sortCol - The sort column.

visibleColumns

protected abstract int visibleColumns()

Returns:

Number of visible columns.

column

protected abstract GridSqlAst column(int col)

Parameters:

col - Column index.

Returns:

Expression for column index.

resultType

public GridSqlType resultType()

Specified by:

resultType in interface GridSqlAst

Returns:

Optional expression result type (if this is an expression and result type is known).

child

public <E extends GridSqlAst> E child()

Get the first child.

Specified by:

child in interface GridSqlAst

Returns:

Child element.

child

public <E extends GridSqlAst> E child(int childIdx)

Get child by index.

Specified by:

child in interface GridSqlAst

Parameters:

childIdx - Index of the requested child.

Returns:

Child element.

maskNull

protected static <E extends GridSqlAst> E maskNull(GridSqlAst x,
                                                   GridSqlAst dflt)

Parameters:

x - Element.

Returns:

Empty placeholder if the element is null.

child

public <E extends GridSqlAst> void child(int childIdx,
                                         E child)

Set child.

Specified by:

child in interface GridSqlAst

Parameters:

childIdx - Index of the requested child.

child - Child element.

skipMergeTable

public abstract boolean skipMergeTable()

Returns:

If this is a simple query with no conditions, expressions, sorting, etc...

getSortLimitSQL

protected void getSortLimitSQL(StringBuilder buff)

Parameters:

buff - Statement builder.

hasOffsetLimit

public boolean hasOffsetLimit()

Whether offset or limit exists.

Returns:

true If we have OFFSET LIMIT.