github.com/kunlun-qilian/sqlx/v3@v3.0.0/builder/stmt_insert.go (about)

     1  package builder
     2  
     3  import (
     4  	"context"
     5  )
     6  
     7  func Insert(modifiers ...string) *StmtInsert {
     8  	return &StmtInsert{
     9  		modifiers: modifiers,
    10  	}
    11  }
    12  
    13  // https://dev.mysql.com/doc/refman/5.6/en/insert.html
    14  type StmtInsert struct {
    15  	table       *Table
    16  	modifiers   []string
    17  	assignments []*Assignment
    18  	additions   Additions
    19  }
    20  
    21  func (s StmtInsert) Into(table *Table, additions ...Addition) *StmtInsert {
    22  	s.table = table
    23  	s.additions = additions
    24  	return &s
    25  }
    26  
    27  func (s StmtInsert) Values(cols *Columns, values ...interface{}) *StmtInsert {
    28  	s.assignments = Assignments{ColumnsAndValues(cols, values...)}
    29  	return &s
    30  }
    31  
    32  func (s *StmtInsert) IsNil() bool {
    33  	return s == nil || s.table == nil || len(s.assignments) == 0
    34  }
    35  
    36  func (s *StmtInsert) Ex(ctx context.Context) *Ex {
    37  	e := Expr("INSERT")
    38  
    39  	if len(s.modifiers) > 0 {
    40  		for i := range s.modifiers {
    41  			e.WriteQueryByte(' ')
    42  			e.WriteQuery(s.modifiers[i])
    43  		}
    44  	}
    45  
    46  	e.WriteQuery(" INTO ")
    47  	e.WriteExpr(s.table)
    48  	e.WriteQueryByte(' ')
    49  
    50  	e.WriteExpr(ExprBy(func(ctx context.Context) *Ex {
    51  		e := Expr("")
    52  		e.Grow(len(s.assignments))
    53  
    54  		ctx = ContextWithToggles(ctx, Toggles{
    55  			ToggleUseValues: true,
    56  		})
    57  
    58  		WriteAssignments(e, s.assignments...)
    59  
    60  		return e.Ex(ctx)
    61  	}))
    62  
    63  	WriteAdditions(e, s.additions...)
    64  
    65  	return e.Ex(ctx)
    66  }
    67  
    68  func OnDuplicateKeyUpdate(assignments ...*Assignment) *OtherAddition {
    69  	assigns := assignments
    70  	if len(assignments) == 0 {
    71  		return nil
    72  	}
    73  
    74  	e := Expr("ON DUPLICATE KEY UPDATE ")
    75  
    76  	for i := range assigns {
    77  		if i > 0 {
    78  			e.WriteQuery(", ")
    79  		}
    80  		e.WriteExpr(assigns[i])
    81  	}
    82  
    83  	return AsAddition(e)
    84  }
    85  
    86  func Returning(expr SqlExpr) *OtherAddition {
    87  	e := Expr("RETURNING ")
    88  	if expr == nil || expr.IsNil() {
    89  		e.WriteQueryByte('*')
    90  	} else {
    91  		e.WriteExpr(expr)
    92  	}
    93  	return AsAddition(e)
    94  }