2020-08-06 20:58:47 +03:00
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package ast
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2022-12-18 11:35:59 +03:00
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var (
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_ Node = (*Func)(nil)
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_ ColExpr = (*Func)(nil)
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)
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2020-08-06 20:58:47 +03:00
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// Func models a function. For example, "COUNT()".
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type Func struct {
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baseNode
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fnName string
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}
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// FuncName returns the function name.
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func (fn *Func) FuncName() string {
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return fn.fnName
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}
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func (fn *Func) String() string {
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return nodeString(fn)
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}
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// ColExpr implements ColExpr.
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func (fn *Func) ColExpr() (string, error) {
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return fn.ctx.GetText(), nil
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}
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// SetChildren implements Node.
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func (fn *Func) SetChildren(children []Node) error {
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fn.setChildren(children)
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return nil
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}
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// IsColName implements ColExpr.
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func (fn *Func) IsColName() bool {
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return false
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}
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func (fn *Func) AddChild(child Node) error {
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// TODO: add check for valid Func child types
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fn.addChild(child)
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return child.SetParent(fn)
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}
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