com.exasol.sql.dql.select

Class FromClause

java.lang.Object

com.exasol.sql.AbstractFragment

com.exasol.sql.dql.select.FromClause

All Implemented Interfaces:

SelectFragment, Fragment

public class FromClause
extends AbstractFragment
implements SelectFragment

This class represents the FROM clause of an SQL SELECT statement.

Field Summary

Fields inherited from class com.exasol.sql.AbstractFragment

root

Constructor Summary

Constructors

Constructor and Description
FromClause(Fragment root) Create a new instance of a FromClause.

Method Summary

Modifier and Type	Method and Description
void	accept(SelectVisitor visitor) Accept a visitor (e.g.
FromClause	fullJoin(String name, String specification) Create a new full Join that belongs to a FROM clause.
FromClause	fullOuterJoin(String name, String specification) Create a new full outer Join that belongs to a FROM clause.
boolean	hasSubSelect() Check if the FromClause contains a sub-select statement.
FromClause	innerJoin(String name, String specification) Create a new inner Join that belongs to a FROM clause.
FromClause	join(String name, String specification) Create a new Join that belongs to a FROM clause.
FromClause	leftJoin(String name, String specification) Create a new left Join that belongs to a FROM clause.
FromClause	leftOuterJoin(String name, String specification) Create a new left outer Join that belongs to a FROM clause.
FromClause	rightJoin(String name, String specification) Create a new right Join that belongs to a FROM clause.
FromClause	rightOuterJoin(String name, String specification) Create a new right outer Join that belongs to a FROM clause.
FromClause	select(Select select) Add a select to the FromClause.
FromClause	table(String name) Add a table name to the FromClause.
FromClause	tableAs(String name, String as) Add a table name with an alias to the FromClause.
FromClause	valueTable(ValueTable valueTable) Create a FromClause from a value table.
FromClause	valueTableAs(ValueTable valueTable, String tableNameAlias, String... columnNameAliases) Create a FromClause from a value table and an alias.

Methods inherited from class com.exasol.sql.AbstractFragment

getRoot

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.exasol.sql.Fragment

getRoot

Constructor Detail

FromClause

public FromClause(Fragment root)

Create a new instance of a FromClause.

Parameters:

root - root SQL statement this FROM clause belongs to

Method Detail

table

public FromClause table(String name)

Add a table name to the FromClause.

Parameters:

name - table name

Returns:

FROM clause

tableAs

public FromClause tableAs(String name,
                          String as)

Add a table name with an alias to the FromClause.

Parameters:

name - table name

as - table alias

Returns:

parent FROM clause

valueTable

public FromClause valueTable(ValueTable valueTable)

Create a FromClause from a value table.

Parameters:

valueTable - table of value expressions

Returns:

parent FROM clause

valueTableAs

public FromClause valueTableAs(ValueTable valueTable,
                               String tableNameAlias,
                               String... columnNameAliases)

Create a FromClause from a value table and an alias.

Parameters:

valueTable - table of value expressions

tableNameAlias - table alias

columnNameAliases - columns aliases

Returns:

parent FROM clause

join

public FromClause join(String name,
                       String specification)

Create a new Join that belongs to a FROM clause.

Parameters:

name - name of the table to be joined

specification - join conditions

Returns:

parent FROM clause

innerJoin

public FromClause innerJoin(String name,
                            String specification)

Create a new inner Join that belongs to a FROM clause.

Parameters:

name - name of the table to be joined

specification - join conditions

Returns:

parent FROM clause

leftJoin

public FromClause leftJoin(String name,
                           String specification)

Create a new left Join that belongs to a FROM clause.

Parameters:

name - name of the table to be joined

specification - join conditions

Returns:

parent FROM clause

rightJoin

public FromClause rightJoin(String name,
                            String specification)

Create a new right Join that belongs to a FROM clause.

Parameters:

name - name of the table to be joined

specification - join conditions

Returns:

parent FROM clause

fullJoin

public FromClause fullJoin(String name,
                           String specification)

Create a new full Join that belongs to a FROM clause.

Parameters:

name - name of the table to be joined

specification - join conditions

Returns:

parent FROM clause

leftOuterJoin

public FromClause leftOuterJoin(String name,
                                String specification)

Create a new left outer Join that belongs to a FROM clause.

Parameters:

name - name of the table to be joined

specification - join conditions

Returns:

parent FROM clause

rightOuterJoin

public FromClause rightOuterJoin(String name,
                                 String specification)

Create a new right outer Join that belongs to a FROM clause.

Parameters:

name - name of the table to be joined

specification - join conditions

Returns:

parent FROM clause

fullOuterJoin

public FromClause fullOuterJoin(String name,
                                String specification)

Create a new full outer Join that belongs to a FROM clause.

Parameters:

name - name of the table to be joined

specification - join conditions

Returns:

parent FROM clause

select

public FromClause select(Select select)

Add a select to the FromClause.

Parameters:

select - SELECT statement

Returns:

FROM clause

hasSubSelect

public boolean hasSubSelect()

Check if the FromClause contains a sub-select statement.

Returns:

true if the FromClause contains a sub-select statement

accept

public void accept(SelectVisitor visitor)

Description copied from interface: SelectFragment

Accept a visitor (e.g. a renderer or validator)

Specified by:

accept in interface SelectFragment

Parameters:

visitor - visitor to accept