github.com/hasnat/dolt/go@v0.0.0-20210628190320-9eb5d843fbb7/libraries/doltcore/sqle/dfunctions/dolt_add.go (about)

     1  // Copyright 2020 Dolthub, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package dfunctions
    16  
    17  import (
    18  	"fmt"
    19  	"strings"
    20  
    21  	"github.com/dolthub/go-mysql-server/sql"
    22  
    23  	"github.com/dolthub/dolt/go/cmd/dolt/cli"
    24  	"github.com/dolthub/dolt/go/libraries/doltcore/env/actions"
    25  	"github.com/dolthub/dolt/go/libraries/doltcore/sqle"
    26  )
    27  
    28  const DoltAddFuncName = "dolt_add"
    29  
    30  type DoltAddFunc struct {
    31  	children []sql.Expression
    32  }
    33  
    34  func (d DoltAddFunc) Eval(ctx *sql.Context, row sql.Row) (interface{}, error) {
    35  	dbName := ctx.GetCurrentDatabase()
    36  
    37  	if len(dbName) == 0 {
    38  		return 1, fmt.Errorf("Empty database name.")
    39  	}
    40  
    41  	dSess := sqle.DSessFromSess(ctx.Session)
    42  	dbData, ok := dSess.GetDbData(dbName)
    43  
    44  	if !ok {
    45  		return 1, fmt.Errorf("Could not load database %s", dbName)
    46  	}
    47  
    48  	ap := cli.CreateAddArgParser()
    49  	args, err := getDoltArgs(ctx, row, d.Children())
    50  
    51  	if err != nil {
    52  		return 1, err
    53  	}
    54  
    55  	apr, err := ap.Parse(args)
    56  	if err != nil {
    57  		return 1, err
    58  	}
    59  
    60  	allFlag := apr.Contains(cli.AllFlag)
    61  
    62  	if apr.NArg() == 0 && !allFlag {
    63  		return 1, fmt.Errorf("Nothing specified, nothing added. Maybe you wanted to say 'dolt add .'?")
    64  	} else if allFlag || apr.NArg() == 1 && apr.Arg(0) == "." {
    65  		err = actions.StageAllTables(ctx, dbData)
    66  		if err != nil {
    67  			return 1, err
    68  		}
    69  
    70  		hashString := dbData.Rsr.StagedHash().String()
    71  		if err != nil {
    72  			return 1, err
    73  		}
    74  
    75  		// Sets @@_working to staged.
    76  		err = setSessionRootExplicit(ctx, hashString, sqle.WorkingKeySuffix)
    77  	} else {
    78  		err = actions.StageTables(ctx, dbData, apr.Args())
    79  	}
    80  
    81  	if err != nil {
    82  		return 1, err
    83  	}
    84  
    85  	return 0, nil
    86  }
    87  
    88  func (d DoltAddFunc) Resolved() bool {
    89  	for _, child := range d.Children() {
    90  		if !child.Resolved() {
    91  			return false
    92  		}
    93  	}
    94  	return true
    95  }
    96  
    97  func (d DoltAddFunc) String() string {
    98  	childrenStrings := make([]string, len(d.children))
    99  
   100  	for i, child := range d.children {
   101  		childrenStrings[i] = child.String()
   102  	}
   103  
   104  	return fmt.Sprintf("DOLT_ADD(%s)", strings.Join(childrenStrings, ","))
   105  }
   106  
   107  func (d DoltAddFunc) Type() sql.Type {
   108  	return sql.Int8
   109  }
   110  
   111  func (d DoltAddFunc) IsNullable() bool {
   112  	for _, child := range d.Children() {
   113  		if child.IsNullable() {
   114  			return true
   115  		}
   116  	}
   117  	return false
   118  }
   119  
   120  func (d DoltAddFunc) Children() []sql.Expression {
   121  	return d.children
   122  }
   123  
   124  func (d DoltAddFunc) WithChildren(ctx *sql.Context, children ...sql.Expression) (sql.Expression, error) {
   125  	return NewDoltAddFunc(ctx, children...)
   126  }
   127  
   128  // NewDoltAddFunc creates a new DoltAddFunc expression whose children represents the args passed in DOLT_ADD.
   129  func NewDoltAddFunc(ctx *sql.Context, args ...sql.Expression) (sql.Expression, error) {
   130  	return &DoltAddFunc{children: args}, nil
   131  }