42 lines
897 B
Go
42 lines
897 B
Go
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package exql
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import (
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"git.hexq.cn/tiglog/mydb/internal/cache"
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)
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// Returning represents a RETURNING clause.
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type Returning struct {
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*Columns
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}
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// Hash returns a unique identifier for the struct.
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func (r *Returning) Hash() uint64 {
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if r == nil {
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return cache.NewHash(FragmentType_Returning, nil)
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}
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return cache.NewHash(FragmentType_Returning, r.Columns)
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}
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var _ = Fragment(&Returning{})
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// ReturningColumns creates and returns an array of Column.
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func ReturningColumns(columns ...Fragment) *Returning {
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return &Returning{Columns: &Columns{Columns: columns}}
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}
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// Compile transforms the clause into its equivalent SQL representation.
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func (r *Returning) Compile(layout *Template) (compiled string, err error) {
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if z, ok := layout.Read(r); ok {
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return z, nil
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}
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compiled, err = r.Columns.Compile(layout)
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if err != nil {
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return "", err
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}
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layout.Write(r, compiled)
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return
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}
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