ColumnProvider (DBvolution 10 1.0.1 API)

All Superinterfaces:

DBExpression, HasSQLString

All Known Implementing Classes:

BooleanArrayColumn, BooleanColumn, ByteArrayColumn, DateColumn, DateRepeatColumn, DurationColumn, InstantColumn, IntegerColumn, JavaObjectColumn, LargeBinaryColumn, LargeObjectColumn, LargeTextColumn, Line2DColumn, LineSegment2DColumn, LocalDateColumn, LocalDateTimeColumn, MultiPoint2DColumn, NumberColumn, Point2DColumn, Polygon2DColumn, QueryColumn, StringColumn, UntypedColumn, UUIDColumn
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public interface ColumnProvider
extends DBExpression
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Interface to indicate that this object can provide a column.
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Author:

Gregory Graham

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`SortProvider`	`ascending()`
`SortProvider`	`descending()`
`AbstractColumn`	`getColumn()`	Returns the AbstractColumn from this ColumnProvider.
`SortProvider`	`getSortProvider()`	Provides the sorting for this column as defined by the methods `QueryableDatatype.setSortOrder(java.lang.Boolean)`, `QueryableDatatype.setSortOrderAscending()`, and `QueryableDatatype.setSortOrderDescending()` on the QDT.
`void`	`setUseTableAlias(boolean useTableAlias)`	Indicates whether the ColumnProvider should use the table alias during query creation.

Methods inherited from interface nz.co.gregs.dbvolution.expressions.DBExpression
copy, createSQLForFromClause, createSQLForGroupByClause, getQueryableDatatypeForExpressionValue, getTablesInvolved, isAggregator, isComplexExpression, isPurelyFunctional, isWindowingFunction

Methods inherited from interface nz.co.gregs.dbvolution.expressions.HasSQLString
toSQLString

- Method Detail
  - getColumn
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AbstractColumn getColumn()
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    Returns the AbstractColumn from this ColumnProvider.
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    Returns:
    
    the column that this provider supplies.
  - setUseTableAlias
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void setUseTableAlias(boolean useTableAlias)
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    Indicates whether the ColumnProvider should use the table alias during query creation.
    the standard implementation is this.column.setUseTableAlias(useTableAlias); and passes the boolean along to the underlying AbstractColumn
    
    Parameters:
    
    useTableAlias - true or false
  - getSortProvider
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SortProvider getSortProvider()
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    Provides the sorting for this column as defined by the methods QueryableDatatype.setSortOrder(java.lang.Boolean), QueryableDatatype.setSortOrderAscending(), and QueryableDatatype.setSortOrderDescending() on the QDT.
    At the time of querying the sort order defined on the original QDT field provided is add to the query, with ASCENDING being used as the default ordering.
    
    To be certain of the ordering use the AnyExpression.ascending() and AnyExpression.descending() methods.
    
    Returns:
    
    a SortProvider configured to use the sorting defined on original QDT or ASCENDING.
  - ascending
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SortProvider ascending()
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  - descending
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SortProvider descending()
```