77 lines
1.8 KiB
Go
77 lines
1.8 KiB
Go
package schema
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type QueryAppender interface {
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AppendQuery(fmter Formatter, b []byte) ([]byte, error)
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}
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type ColumnsAppender interface {
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AppendColumns(fmter Formatter, b []byte) ([]byte, error)
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}
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//------------------------------------------------------------------------------
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// Safe represents a safe SQL query.
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type Safe string
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var _ QueryAppender = (*Safe)(nil)
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func (s Safe) AppendQuery(fmter Formatter, b []byte) ([]byte, error) {
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return append(b, s...), nil
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}
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//------------------------------------------------------------------------------
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// Ident represents a SQL identifier, for example, table or column name.
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type Ident string
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var _ QueryAppender = (*Ident)(nil)
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func (s Ident) AppendQuery(fmter Formatter, b []byte) ([]byte, error) {
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return fmter.AppendIdent(b, string(s)), nil
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}
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//------------------------------------------------------------------------------
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type QueryWithArgs struct {
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Query string
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Args []interface{}
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}
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var _ QueryAppender = QueryWithArgs{}
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func SafeQuery(query string, args []interface{}) QueryWithArgs {
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if args == nil {
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args = make([]interface{}, 0)
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}
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return QueryWithArgs{Query: query, Args: args}
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}
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func UnsafeIdent(ident string) QueryWithArgs {
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return QueryWithArgs{Query: ident}
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}
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func (q QueryWithArgs) IsZero() bool {
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return q.Query == "" && q.Args == nil
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}
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func (q QueryWithArgs) AppendQuery(fmter Formatter, b []byte) ([]byte, error) {
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if q.Args == nil {
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return fmter.AppendIdent(b, q.Query), nil
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}
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return fmter.AppendQuery(b, q.Query, q.Args...), nil
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}
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//------------------------------------------------------------------------------
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type QueryWithSep struct {
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QueryWithArgs
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Sep string
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}
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func SafeQueryWithSep(query string, args []interface{}, sep string) QueryWithSep {
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return QueryWithSep{
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QueryWithArgs: SafeQuery(query, args),
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Sep: sep,
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}
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}
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