mirror of
https://github.com/neilotoole/sq.git
synced 2024-12-26 01:34:43 +03:00
332 lines
8.6 KiB
Go
332 lines
8.6 KiB
Go
package cli
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import (
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"fmt"
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"github.com/neilotoole/sq/cli/run"
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"github.com/neilotoole/sq/cli/flag"
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"github.com/spf13/cobra"
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"github.com/neilotoole/sq/libsq/core/errz"
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"github.com/neilotoole/sq/libsq/core/stringz"
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"github.com/neilotoole/sq/libsq/driver"
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"github.com/neilotoole/sq/libsq/source"
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)
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func newTblCmd() *cobra.Command {
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cmd := &cobra.Command{
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Use: "tbl",
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Short: "Useful table actions (copy, truncate, drop)",
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RunE: func(cmd *cobra.Command, args []string) error {
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return cmd.Help()
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},
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Example: ` # Copy table actor to new table actor2
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$ sq tbl copy @sakila_sl3.actor actor2
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# Truncate table actor2
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$ sq tbl truncate @sakila_sl3.actor2
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# Drop table actor2
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$ sq tbl drop @sakila_sl3.actor2`,
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}
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return cmd
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}
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func newTblCopyCmd() *cobra.Command {
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cmd := &cobra.Command{
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Use: "copy @HANDLE.TABLE NEWTABLE",
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Short: "Make a copy of a table",
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Long: `Make a copy of a table in the same database. The table data is also copied by default.`,
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ValidArgsFunction: completeTblCopy,
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RunE: execTblCopy,
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Example: ` # Copy table "actor" in @sakila_sl3 to new table "actor2"
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$ sq tbl copy @sakila_sl3.actor .actor2
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# Copy table "actor" in active src to table "actor2"
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$ sq tbl copy .actor .actor2
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# Copy table "actor" in active src to generated table name (e.g. "@sakila_sl3.actor_copy__1ae03e9b")
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$ sq tbl copy .actor
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# Copy table structure, but don't copy table data
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$ sq tbl copy --data=false .actor`,
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}
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addTextFlags(cmd)
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cmd.Flags().BoolP(flag.JSON, flag.JSONShort, false, flag.JSONUsage)
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cmd.Flags().BoolP(flag.Compact, flag.CompactShort, false, flag.CompactUsage)
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cmd.Flags().Bool(flag.TblData, true, flag.TblDataUsage)
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return cmd
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}
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func execTblCopy(cmd *cobra.Command, args []string) error {
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ru := run.FromContext(cmd.Context())
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if len(args) == 0 || len(args) > 2 {
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return errz.New("one or two table args required")
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}
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tblHandles, err := parseTableHandleArgs(ru.DriverRegistry, ru.Config.Collection, args)
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if err != nil {
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return err
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}
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if tblHandles[0].tbl == "" {
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return errz.Errorf("arg {%s} does not specify a table name", args[0])
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}
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switch len(tblHandles) {
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case 1:
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// Make a copy of the first tbl handle
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tblHandles = append(tblHandles, tblHandles[0])
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// But we can't copy the table to itself, so we create a new name
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tblHandles[1].tbl = stringz.UniqTableName(tblHandles[0].tbl + "_copy")
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case 2:
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if tblHandles[1].tbl == "" {
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tblHandles[1].tbl = stringz.UniqTableName(tblHandles[0].tbl + "_copy")
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}
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default:
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return errz.New("one or two table args required")
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}
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if tblHandles[0].src.Handle != tblHandles[1].src.Handle {
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return errz.Errorf("tbl copy only works on the same source, but got %s.%s --> %s.%s",
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tblHandles[0].handle, tblHandles[0].tbl,
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tblHandles[1].handle, tblHandles[1].tbl)
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}
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if tblHandles[0].tbl == tblHandles[1].tbl {
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return errz.Errorf("cannot copy table %s.%s to itself", tblHandles[0].handle, tblHandles[0].tbl)
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}
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sqlDrvr, ok := tblHandles[0].drvr.(driver.SQLDriver)
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if !ok {
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return errz.Errorf("driver type {%s} (%s) doesn't support dropping tables", tblHandles[0].src.Type,
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tblHandles[0].src.Handle)
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}
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copyData := true // copy data by default
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if cmdFlagChanged(cmd, flag.TblData) {
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copyData, err = cmd.Flags().GetBool(flag.TblData)
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if err != nil {
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return errz.Err(err)
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}
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}
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if err = applyCollectionOptions(cmd, ru.Config.Collection); err != nil {
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return err
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}
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var dbase driver.Database
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dbase, err = ru.Databases.Open(cmd.Context(), tblHandles[0].src)
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if err != nil {
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return err
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}
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copied, err := sqlDrvr.CopyTable(cmd.Context(), dbase.DB(), tblHandles[0].tbl, tblHandles[1].tbl, copyData)
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if err != nil {
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return errz.Wrapf(err, "failed tbl copy %s.%s --> %s.%s",
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tblHandles[0].handle, tblHandles[0].tbl,
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tblHandles[1].handle, tblHandles[1].tbl)
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}
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msg := fmt.Sprintf("Copied table: %s.%s --> %s.%s",
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tblHandles[0].handle, tblHandles[0].tbl,
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tblHandles[1].handle, tblHandles[1].tbl)
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if copyData {
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switch copied {
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case 1:
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msg += " (1 row copied)"
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default:
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msg += fmt.Sprintf(" (%d rows copied)", copied)
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}
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}
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fmt.Fprintln(ru.Out, msg)
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return nil
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}
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func newTblTruncateCmd() *cobra.Command {
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cmd := &cobra.Command{
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Use: "truncate @HANDLE.TABLE|.TABLE",
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Short: "Truncate one or more tables",
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Long: `Truncate one or more tables. Note that this command
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only applies to SQL sources.`,
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RunE: execTblTruncate,
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ValidArgsFunction: (&handleTableCompleter{
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onlySQL: true,
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}).complete,
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Example: ` # truncate table "actor"" in source @sakila_sl3
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$ sq tbl truncate @sakila_sl3.actor
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# truncate table "payment"" in the active src
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$ sq tbl truncate .payment
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# truncate multiple tables
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$ sq tbl truncate .payment @sakila_sl3.actor`,
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}
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addTextFlags(cmd)
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cmd.Flags().BoolP(flag.JSON, flag.JSONShort, false, flag.JSONUsage)
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return cmd
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}
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func execTblTruncate(cmd *cobra.Command, args []string) (err error) {
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ru := run.FromContext(cmd.Context())
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var tblHandles []tblHandle
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tblHandles, err = parseTableHandleArgs(ru.DriverRegistry, ru.Config.Collection, args)
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if err != nil {
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return err
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}
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if err = applyCollectionOptions(cmd, ru.Config.Collection); err != nil {
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return err
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}
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for _, tblH := range tblHandles {
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var affected int64
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affected, err = tblH.drvr.Truncate(cmd.Context(), tblH.src, tblH.tbl, true)
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if err != nil {
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return err
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}
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msg := fmt.Sprintf("Truncated %d row(s) from %s.%s", affected, tblH.src.Handle, tblH.tbl)
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msg = stringz.Plu(msg, int(affected))
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fmt.Fprintln(ru.Out, msg)
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}
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return nil
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}
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func newTblDropCmd() *cobra.Command {
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cmd := &cobra.Command{
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Use: "drop @HANDLE.TABLE",
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Short: "Drop one or more tables",
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Long: `Drop one or more tables. Note that this command
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only applies to SQL sources.`,
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RunE: execTblDrop,
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ValidArgsFunction: (&handleTableCompleter{
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onlySQL: true,
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}).complete,
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Example: `# drop table "actor" in src @sakila_sl3
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$ sq tbl drop @sakila_sl3.actor
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# drop table "payment"" in the active src
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$ sq tbl drop .payment
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# drop multiple tables
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$ sq drop .payment @sakila_sl3.actor`,
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}
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return cmd
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}
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func execTblDrop(cmd *cobra.Command, args []string) (err error) {
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ru := run.FromContext(cmd.Context())
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var tblHandles []tblHandle
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tblHandles, err = parseTableHandleArgs(ru.DriverRegistry, ru.Config.Collection, args)
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if err != nil {
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return err
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}
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if err = applyCollectionOptions(cmd, ru.Config.Collection); err != nil {
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return err
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}
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for _, tblH := range tblHandles {
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sqlDrvr, ok := tblH.drvr.(driver.SQLDriver)
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if !ok {
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return errz.Errorf("driver type {%s} (%s) doesn't support dropping tables", tblH.src.Type, tblH.src.Handle)
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}
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var dbase driver.Database
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dbase, err = ru.Databases.Open(cmd.Context(), tblH.src)
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if err != nil {
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return err
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}
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err = sqlDrvr.DropTable(cmd.Context(), dbase.DB(), tblH.tbl, false)
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if err != nil {
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return err
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}
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fmt.Fprintf(ru.Out, "Dropped table %s.%s\n", tblH.src.Handle, tblH.tbl)
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}
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return nil
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}
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// parseTableHandleArgs parses args of the form:
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//
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// @HANDLE1.TABLE1 .TABLE2 .TABLE3 @HANDLE2.TABLE4 .TABLEN
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//
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// It returns a slice of tblHandle, one for each arg. If an arg
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// does not have a HANDLE, the active src is assumed: it's an error
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// if no active src. It is also an error if len(args) is zero.
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func parseTableHandleArgs(dp driver.Provider, coll *source.Collection, args []string) ([]tblHandle, error) {
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if len(args) == 0 {
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return nil, errz.New(msgInvalidArgs)
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}
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var tblHandles []tblHandle
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activeSrc := coll.Active()
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// We iterate over the args several times, because we want
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// to present error checks consistently.
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for _, arg := range args {
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handle, tbl, err := source.ParseTableHandle(arg)
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if err != nil {
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return nil, err
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}
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tblHandles = append(tblHandles, tblHandle{
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handle: handle,
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tbl: tbl,
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})
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}
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for i := range tblHandles {
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if tblHandles[i].tbl == "" {
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return nil, errz.Errorf("arg[%d] {%s} doesn't specify a table", i, args[i])
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}
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if tblHandles[i].handle == "" {
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// It's a table name without a handle, so we use the active src
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if activeSrc == nil {
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return nil, errz.Errorf("arg[%d] {%s} doesn't specify a handle and there's no active source",
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i, args[i])
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}
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tblHandles[i].handle = activeSrc.Handle
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}
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src, err := coll.Get(tblHandles[i].handle)
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if err != nil {
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return nil, err
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}
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drvr, err := dp.DriverFor(src.Type)
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if err != nil {
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return nil, err
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}
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tblHandles[i].src = src
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tblHandles[i].drvr = drvr
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}
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return tblHandles, nil
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}
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// tblHandle represents a @HANDLE.TABLE, with the handle's associated
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// src and driver.
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type tblHandle struct {
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handle string
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tbl string
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src *source.Source
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drvr driver.Driver
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}
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