Base interface for all SQL-generating classes.
The SQL interface defines the contract that all SQL query components must implement. Every class that represents a part of an SQL query (fields, conditions, operators, etc.) must provide a toSQL method that returns the SQL string representation.
This interface also provides utility static methods for common SQL operations.
Example implementations:
class MyCustomSQL implements SQL {
@override
String toSQL() => 'CUSTOM SQL HERE';
}
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toSQL(
) → String - Converts this SQL component to its string representation.
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
avg(
QField alias) → QSelectField -
Creates an AVG aggregate function with optional alias.
aliasA QField that specifies the field to average and optional alias. Returns a QSelectField representing the AVG function. -
count(
QField alias) → QSelectField - Creates a COUNT aggregate function with optional alias.
-
custom(
String sql) → QSelectField - Creates a custom SQL expression as a selectable field.
-
max(
QField alias) → QSelectField -
Creates a SUM aggregate function with optional alias.
aliasA QField that specifies the field to sum and optional alias. Returns a QSelectField representing the SUM function. -
min(
QField alias) → QSelectField -
Creates a MIN aggregate function with optional alias.
aliasA QField that specifies the field to min and optional alias. Returns a QSelectField representing the MIN function. -
sum(
QField alias) → QSelectField -
Creates a SUM aggregate function with optional alias.
aliasA QField that specifies the field to sum and optional alias. Returns a QSelectField representing the SUM function.