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

Class SplitterUtils

java.lang.Object

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

public class SplitterUtils
extends Object

Utility methods for splitter.

Method Summary

Modifier and Type	Method	Description
static GridSqlAggregateFunction	aggregate(boolean distinct, GridSqlFunctionType type)
static GridSqlAlias	alias(String alias, GridSqlAst child)
static void	checkNoDataTablesInReduceQuery(GridSqlAst ast, String rdcQry)
static GridSqlColumn	column(String name)
static void	findParamsQuery(GridSqlQuery qry, int paramsCnt, TreeSet<Integer> paramIdxs)
static boolean	hasAggregates(GridSqlAst el)	Check whether AST element has aggregates.
static boolean	hasDistinctAggregates(GridSqlAst el)	Lookup for distinct aggregates.
static boolean	hasLeftJoin(GridSqlAst from)	Check whether LEFT OUTER join exist.
static boolean	hasPartitionedTables(GridSqlAst ast)
static boolean	hasSubQueries(GridSqlSelect qry)	Check whether the given SELECT has subqueries.
static boolean	isFractionalType(int type)
static boolean	isTrue(GridSqlAst expr)
static GridSqlOperation	op(GridSqlOperationType type, GridSqlAst left, GridSqlAst right)

Methods inherited from class java.lang.Object

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

Method Detail

hasAggregates

public static boolean hasAggregates(GridSqlAst el)

Check whether AST element has aggregates.

Parameters:

el - Expression part in SELECT clause.

Returns:

true If expression contains aggregates.

findParamsQuery

public static void findParamsQuery(GridSqlQuery qry,
                                   int paramsCnt,
                                   TreeSet<Integer> paramIdxs)

Parameters:

qry - Select.

paramsCnt - Number of parameters.

paramIdxs - Parameter indexes.

hasDistinctAggregates

public static boolean hasDistinctAggregates(GridSqlAst el)

Lookup for distinct aggregates. Note, DISTINCT make no sense for MIN and MAX aggregates, so its will be ignored.

Parameters:

el - Expression.

Returns:

true If expression contains distinct aggregates.

hasLeftJoin

public static boolean hasLeftJoin(GridSqlAst from)

Check whether LEFT OUTER join exist.

Parameters:

from - FROM clause.

Returns:

true If contains LEFT OUTER JOIN.

checkNoDataTablesInReduceQuery

public static void checkNoDataTablesInReduceQuery(GridSqlAst ast,
                                                  String rdcQry)

Parameters:

ast - Reduce query AST.

rdcQry - Reduce query string.

isTrue

public static boolean isTrue(GridSqlAst expr)

Parameters:

expr - Expression.

Returns:

true If this expression represents a constant value `TRUE`.

isFractionalType

public static boolean isFractionalType(int type)

Parameters:

type - data type id

Returns:

true if given type is fractional

aggregate

public static GridSqlAggregateFunction aggregate(boolean distinct,
                                                 GridSqlFunctionType type)

Parameters:

distinct - Distinct.

type - Type.

Returns:

Aggregate function.

column

public static GridSqlColumn column(String name)

Parameters:

name - Column name.

Returns:

Column.

alias

public static GridSqlAlias alias(String alias,
                                 GridSqlAst child)

Parameters:

alias - Alias.

child - Child.

Returns:

Alias.

op

public static GridSqlOperation op(GridSqlOperationType type,
                                  GridSqlAst left,
                                  GridSqlAst right)

Parameters:

type - Type.

left - Left expression.

right - Right expression.

Returns:

Binary operator.

hasPartitionedTables

public static boolean hasPartitionedTables(GridSqlAst ast)

Parameters:

ast - Map query AST.

Returns:

true If the given AST has partitioned tables.

hasSubQueries

public static boolean hasSubQueries(GridSqlSelect qry)

Check whether the given SELECT has subqueries.

Parameters:

qry - Query.

Returns:

True if subqueries are found.