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// Package snowflake defines and registers usql's Snowflake driver.
//
// See: https://github.com/snowflakedb/gosnowflake
package snowflake
import (
"io"
"strconv"
"github.com/snowflakedb/gosnowflake" // DRIVER
"github.com/xo/tblfmt"
"github.com/xo/usql/drivers"
"github.com/xo/usql/drivers/metadata"
infos "github.com/xo/usql/drivers/metadata/informationschema"
"github.com/xo/usql/env"
)
func init() {
gosnowflake.GetLogger().SetOutput(io.Discard)
newReader := infos.New(
infos.WithPlaceholder(func(int) string { return "?" }),
infos.WithCustomClauses(map[infos.ClauseName]string{
infos.SequenceColumnsIncrement: "''",
}),
infos.WithFunctions(false),
infos.WithIndexes(false),
infos.WithConstraints(false),
infos.WithColumnPrivileges(false),
)
drivers.Register("snowflake", drivers.Driver{
AllowMultilineComments: true,
Err: func(err error) (string, string) {
if e, ok := err.(*gosnowflake.SnowflakeError); ok {
return strconv.Itoa(e.Number), e.Message
}
return "", err.Error()
},
NewMetadataReader: newReader,
NewMetadataWriter: func(db drivers.DB, w io.Writer, opts ...metadata.ReaderOption) metadata.Writer {
writerOpts := []metadata.WriterOption{
metadata.WithListAllDbs(func(pattern string, verbose bool) error {
return listAllDbs(db, w, pattern, verbose)
}),
}
return metadata.NewDefaultWriter(newReader(db, opts...), writerOpts...)(db, w)
},
})
}
func listAllDbs(db drivers.DB, w io.Writer, pattern string, verbose bool) error {
rows, err := db.Query("SHOW databases")
if err != nil {
return err
}
defer rows.Close()
params := env.Pall()
params["title"] = "List of databases"
return tblfmt.EncodeAll(w, rows, params)
}
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