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api-docs / org.ktorm.expression / QuerySourceExpression

QuerySourceExpression

abstract class QuerySourceExpression : SqlExpression (source code)

Query source expression, used in the from clause of a SelectExpression.

Constructors

Name	Summary
<init>	`QuerySourceExpression()` Query source expression, used in the `from` clause of a SelectExpression.

Inherited Properties

Name	Summary
extraProperties	`abstract val extraProperties: Map<String, Any>` Extra properties of this expression, maybe useful in SqlFormatter to generate some special SQLs.
isLeafNode	`abstract val isLeafNode: Boolean` Check if this expression is a leaf node in expression trees.

Extension Functions

Name	Summary
eq	`infix fun <T : Any> T.eq( expr: ColumnDeclaring<T> ): BinaryExpression<Boolean>` Equal operator, translated to `=` in SQL.
neq	`infix fun <T : Any> T.neq( expr: ColumnDeclaring<T> ): BinaryExpression<Boolean>` Not-equal operator, translated to `<>` in SQL.
notEq	`infix fun <T : Any> T.notEq( expr: ColumnDeclaring<T> ): BinaryExpression<Boolean>` Not-equal operator, translated to `<>` in SQL.

Inheritors

Name	Summary
JoinExpression	`data class JoinExpression : QuerySourceExpression` Join expression.
NaturalJoinExpression	`data class NaturalJoinExpression : QuerySourceExpression` MySQL natural join expression.
QueryExpression	`sealed class QueryExpression : QuerySourceExpression` Base class of query expressions, provide common properties for SelectExpression and UnionExpression.
TableExpression	`data class TableExpression : QuerySourceExpression` Table expression.