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// Package netezza defines and registers usql's Netezza driver.
//
// See: https://github.com/IBM/nzgo
package netezza
import (
"context"
"io"
"log"
"github.com/IBM/nzgo/v12" // DRIVER: nzgo
"github.com/xo/usql/drivers"
"github.com/xo/usql/drivers/metadata"
infos "github.com/xo/usql/drivers/metadata/informationschema"
)
func init() {
nzgo.Debug = log.New(io.Discard, "", 0)
nzgo.Info = log.New(io.Discard, "", 0)
nzgo.Fatal = log.New(io.Discard, "", 0)
newReader := infos.New(
infos.WithPlaceholder(func(int) string { return "?" }),
infos.WithIndexes(false),
infos.WithConstraints(false),
infos.WithCustomClauses(map[infos.ClauseName]string{
infos.ColumnsColumnSize: "COALESCE(character_maximum_length, numeric_precision, datetime_precision, interval_precision, 0)",
infos.FunctionColumnsColumnSize: "COALESCE(character_maximum_length, numeric_precision, datetime_precision, interval_precision, 0)",
}),
infos.WithSystemSchemas([]string{"DEFINITION_SCHEMA", "INFORMATION_SCHEMA"}),
infos.WithCurrentSchema("CURRENT_SCHEMA"),
)
drivers.Register("nzgo", drivers.Driver{
Name: "nz",
AllowDollar: true,
AllowMultilineComments: true,
LexerName: "postgres",
Version: func(ctx context.Context, db drivers.DB) (string, error) {
var ver string
err := db.QueryRowContext(ctx, `SELECT version()`).Scan(&ver)
if err != nil {
return "", err
}
return "Netezza " + ver, nil
},
ChangePassword: func(db drivers.DB, user, newpw, _ string) error {
_, err := db.Exec(`ALTER USER ` + user + ` PASSWORD '` + newpw + `'`)
return err
},
Err: func(err error) (string, string) {
if e, ok := err.(*nzgo.Error); ok {
return string(e.Code), e.Message
}
return "", err.Error()
},
IsPasswordErr: func(err error) bool {
if e, ok := err.(*nzgo.Error); ok {
return e.Code.Name() == "invalid_password"
}
return false
},
NewMetadataReader: newReader,
NewMetadataWriter: func(db drivers.DB, w io.Writer, opts ...metadata.ReaderOption) metadata.Writer {
return metadata.NewDefaultWriter(newReader(db, opts...))(db, w)
},
})
}
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