com.feedzai.commons.sql.abstraction.dml

Class Expression

java.lang.Object

com.feedzai.commons.sql.abstraction.dml.Expression

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

AlterColumn, Between, Coalesce, Delete, DropPrimaryKey, Function, Join, K, Literal, Modulo, Name, Query, Rename, RepeatDelimiter, Truncate, Update, View

public abstract class Expression
extends Object
implements Serializable

A generic SQL Expression capable of being translated.

NOTE: There are DDL expressions too so this class should be moved from this package.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected String	alias The expression alias if applicable.
protected boolean	enclosed True if the expression is to be enclosed in parenthesis.
protected List<Join>	joins The list of joins, if applicable.
protected boolean	noLock The SQL Server's no lock keyword.
protected String	ordering The string that specified the ordering if applicable.
protected boolean	quotes True if the expression is to be put around quotes.

Constructor Summary

Constructors

Constructor and Description
Expression()

Method Summary

Methods

Modifier and Type	Method and Description
Expression	alias(String alias) Alias this expression.
Expression	asc() Sets ordering to ascendent.
Expression	desc() Sets ordering to descendent.
Expression	enclose() Enclose this expression with parenthesis.
Expression	fullOuterJoin(Expression table, Expression expr) Sets a full outer join with the current table.
Expression	innerJoin(Expression table, Expression expr) Sets an inner join with the current table.
boolean	isAliased()
boolean	isEnclosed()
boolean	isQuote() True if this expression is quoted, false otherwise.
boolean	isWithNoLock()
Expression	leftOuterJoin(Expression table, Expression expr) Sets a left outer join with the current table.
Expression	rightOuterJoin(Expression table, Expression expr) Sets a right outer join with the current table.
String	translate(Dialect diaclect, PdbProperties properties) Translates this expression according to the dialect.
abstract String	translateDB2(PdbProperties properties) DB2 SQL translation.
abstract String	translateH2(PdbProperties properties) PostgreSQL SQL translation.
abstract String	translateMySQL(PdbProperties properties) MySQL SQL translation.
abstract String	translateOracle(PdbProperties properties) Oracle SQL translation.
abstract String	translatePostgreSQL(PdbProperties properties) PostgreSQL SQL translation.
abstract String	translateSQLServer(PdbProperties properties) SQLServer SQL translation.
Expression	unquote() Remove quotes for this expression.
Expression	withNoLock() Sets no lock keyword on SQL Server tables.

Methods inherited from class java.lang.Object

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

Field Detail

alias

protected String alias

The expression alias if applicable.

enclosed

protected boolean enclosed

True if the expression is to be enclosed in parenthesis.

quotes

protected boolean quotes

True if the expression is to be put around quotes.

ordering

protected String ordering

The string that specified the ordering if applicable.

joins

protected final List<Join> joins

The list of joins, if applicable.

noLock

protected boolean noLock

The SQL Server's no lock keyword.

Constructor Detail

Expression

public Expression()

Method Detail

translate

public String translate(Dialect diaclect,
               PdbProperties properties)

Translates this expression according to the dialect.

Parameters:

diaclect - The dialect.

properties - The configuration.

Returns:

The result of the translation.

translateDB2

public abstract String translateDB2(PdbProperties properties)

DB2 SQL translation.

Parameters:

properties - The configuration.

Returns:

The translation result.

translateOracle

public abstract String translateOracle(PdbProperties properties)

Oracle SQL translation.

Parameters:

properties - The configuration.

Returns:

The translation result.

translateMySQL

public abstract String translateMySQL(PdbProperties properties)

MySQL SQL translation.

Parameters:

properties - The configuration.

Returns:

The translation result.

translateSQLServer

public abstract String translateSQLServer(PdbProperties properties)

SQLServer SQL translation.

Parameters:

properties - The configuration.

Returns:

The translation result.

translatePostgreSQL

public abstract String translatePostgreSQL(PdbProperties properties)

PostgreSQL SQL translation.

Parameters:

properties - The configuration.

Returns:

The translation result.

translateH2

public abstract String translateH2(PdbProperties properties)

PostgreSQL SQL translation.

Parameters:

properties - The configuration.

Returns:

The translation result.

alias

public Expression alias(String alias)

Alias this expression.

Parameters:

alias - The alias.

Returns:

This object.

unquote

public Expression unquote()

Remove quotes for this expression.

Returns:

This object.

enclose

public Expression enclose()

Enclose this expression with parenthesis.

Returns:

This object.

asc

public Expression asc()

Sets ordering to ascendent.

Returns:

This object.

desc

public Expression desc()

Sets ordering to descendent.

Returns:

This object.

isEnclosed

public boolean isEnclosed()

Returns:

True if this expression is enclosed, false otherwise.

isQuote

public boolean isQuote()

True if this expression is quoted, false otherwise.

Returns:

true if expression is in between quotes

isAliased

public boolean isAliased()

innerJoin

public Expression innerJoin(Expression table,
                   Expression expr)

Sets an inner join with the current table.

Parameters:

table - The table to join.

expr - The expressions to join.

Returns:

This object.

leftOuterJoin

public Expression leftOuterJoin(Expression table,
                       Expression expr)

Sets a left outer join with the current table.

Parameters:

table - The table to join.

expr - The expressions to join.

Returns:

This object.

rightOuterJoin

public Expression rightOuterJoin(Expression table,
                        Expression expr)

Sets a right outer join with the current table.

Parameters:

table - The table to join.

expr - The expressions to join.

Returns:

This object.

fullOuterJoin

public Expression fullOuterJoin(Expression table,
                       Expression expr)

Sets a full outer join with the current table.

Parameters:

table - The table to join.

expr - The expressions to join.

Returns:

This object.

withNoLock

public Expression withNoLock()

Sets no lock keyword on SQL Server tables.

Returns:

This object.

isWithNoLock

public boolean isWithNoLock()

Returns:

True of the no lock keyword is set, false otherwise.