org.sql.generation.api.grammar.factories
Interface QueryFactory

All Known Subinterfaces:

PgSQLQueryFactory

public interface QueryFactory

A factory, which creates builders and syntax elements for SQL queries (SELECT statements). This factory may be obtained from SQLVendor.

Author:

Stanislav Muhametsin

See Also:

SQLVendor, QueryExpression, QuerySpecification

Method Summary

ColumnsBuilder	columnsBuilder() Creates a builder for the columns in SELECT expressions.
ColumnsBuilder	columnsBuilder(SetQuantifier setQuantifier) Creates a builder for columns in SELECT expressions, which has specified set quantifier initially.
QueryExpression	createQuery(QueryExpressionBody body) Creates new query, which has the specified body as an actual query.
FromBuilder	fromBuilder() Creates a builder for FROM clause.
GroupByBuilder	groupByBuilder() Creates a builder for GROUP BY clause.
OrdinaryGroupingSet	groupingElement(NonBooleanExpression... expressions) Creates a new grouping element, which has some expressions as grouping columns.
OrderByBuilder	orderByBuilder() Creats a builder for ORDER BY clause.
QueryBuilder	queryBuilder() Creates a builder to build queries with capability for UNION, INTERSECT, and EXCEPT set operations.
QueryBuilder	queryBuilder(QueryExpressionBody query) Creates a builder to build queries with capability for UNION, INTERSECT, and EXCEPT set operations.
QuerySpecificationBuilder	querySpecificationBuilder() Creates a builder to build query specifications (SELECT expressions).
SortSpecification	sortSpec(ValueExpression expression, Ordering ordering) Creates a new sort specification for ORDER BY clause.

Method Detail

createQuery

QueryExpression createQuery(QueryExpressionBody body)

Creates new query, which has the specified body as an actual query.

Parameters:

body - The actual query to use.

Returns:

The new QueryExpression

querySpecificationBuilder

QuerySpecificationBuilder querySpecificationBuilder()

Creates a builder to build query specifications (SELECT expressions).

Returns:

The new QuerySpecificationBuilder.

columnsBuilder

ColumnsBuilder columnsBuilder()

Creates a builder for the columns in SELECT expressions.

Calling this method is equivalent to calling columnsBuilder(SetQuantifier) and passing SetQuantifier.ALL as argument.

Returns:

The new ColumnsBuilder.

columnsBuilder

ColumnsBuilder columnsBuilder(SetQuantifier setQuantifier)

Creates a builder for columns in SELECT expressions, which has specified set quantifier initially.

Parameters:

setQuantifier - The set quantifier to use.

Returns:

The new ColumnsBuilder.

queryBuilder

QueryBuilder queryBuilder()

Creates a builder to build queries with capability for UNION, INTERSECT, and EXCEPT set operations.

Calling this method is equivalent in calling queryBuilder(QueryExpressionBody) and passing QueryExpressionBody.EmptyQueryExpressionBody as argument.

Returns:

The new QueryBuilder.

queryBuilder

QueryBuilder queryBuilder(QueryExpressionBody query)

Creates a builder to build queries with capability for UNION, INTERSECT, and EXCEPT set operations.

Parameters:

query - The initial query for builder.

Returns:

The new QueryBuilder.

groupByBuilder

GroupByBuilder groupByBuilder()

Creates a builder for GROUP BY clause.

Returns:

The new GroupByBuilder.

fromBuilder

FromBuilder fromBuilder()

Creates a builder for FROM clause.

Returns:

The new FromBuilder.

groupingElement

OrdinaryGroupingSet groupingElement(NonBooleanExpression... expressions)

Creates a new grouping element, which has some expressions as grouping columns.

Parameters:

expressions - The expressions to use.

Returns:

The new OrdinaryGroupingSet.

See Also:

GroupByClause

sortSpec

SortSpecification sortSpec(ValueExpression expression,
                           Ordering ordering)

Creates a new sort specification for ORDER BY clause.

Parameters:

expression - The expression for column.

ordering - The ordering to use.

Returns:

The new SortSpecification.

orderByBuilder

OrderByBuilder orderByBuilder()

Creats a builder for ORDER BY clause.

Returns:

The new OrderByBuilder.