org.mybatis.dynamic.sql

Interface BasicColumn

All Known Subinterfaces:

BindableColumn<T>

All Known Implementing Classes:

AbstractCount, AbstractTypeConvertingFunction, AbstractUniTypeFunction, Add, Avg, Concatenate, Constant, Count, CountAll, CountDistinct, DerivedColumn, Divide, Lower, Max, Min, Multiply, OperatorFunction, SqlColumn, StringConstant, Substring, Subtract, Sum, Upper

public interface BasicColumn

Describes attributes of columns that are necessary for rendering if the column is not expected to be bound as a JDBC parameter. Columns in select lists, join expressions, and group by expressions are typically not bound.

Author:

Jeff Butler

Method Summary

Modifier and Type	Method and Description
Optional<String>	alias() Returns the columns alias if one has been specified.
BasicColumn	as(String alias) Returns a new instance of a BasicColumn with the alias set.
static BasicColumn[]	columnList(BasicColumn... columns) Utility method to make it easier to build column lists for methods that require an array rather than the varargs method.
String	renderWithTableAlias(TableAliasCalculator tableAliasCalculator) Returns the name of the item aliased with a table name if appropriate.
default String	renderWithTableAndColumnAlias(TableAliasCalculator tableAliasCalculator) Returns the name of the item aliased with a table name and column alias if appropriate.

Method Detail

alias

Optional<String> alias()

Returns the columns alias if one has been specified.

Returns:

the column alias

as

BasicColumn as(String alias)

Returns a new instance of a BasicColumn with the alias set.

Parameters:

alias - the column alias to set

Returns:

new instance with alias set

renderWithTableAlias

String renderWithTableAlias(TableAliasCalculator tableAliasCalculator)

Returns the name of the item aliased with a table name if appropriate. For example, "a.foo". This is appropriate for where clauses and order by clauses.

Parameters:

tableAliasCalculator - the table alias calculator for the current renderer

Returns:

the item name with the table alias applied

renderWithTableAndColumnAlias

default String renderWithTableAndColumnAlias(TableAliasCalculator tableAliasCalculator)

Returns the name of the item aliased with a table name and column alias if appropriate. For example, "a.foo as bar". This is appropriate for select list clauses.

Parameters:

tableAliasCalculator - the table alias calculator for the current renderer

Returns:

the item name with the table and column aliases applied

columnList

static BasicColumn[] columnList(BasicColumn... columns)

Utility method to make it easier to build column lists for methods that require an array rather than the varargs method.

Parameters:

columns - list of BasicColumn

Returns:

an array of BasicColumn