Function convertColumnDef

internal/engine/dolphin/convert.go:240–300

(def *pcast.ColumnDef)

}

func convertColumnDef(def *pcast.ColumnDef) *ast.ColumnDef {
	var vals *ast.List
	if len(def.Tp.GetElems()) > 0 {
		vals = &ast.List{}
		for i := range def.Tp.GetElems() {
			vals.Items = append(vals.Items, &ast.String{
				Str: def.Tp.GetElems()[i],
			})
		}
	}
	comment := ""
	for _, opt := range def.Options {
		switch opt.Tp {
		case pcast.ColumnOptionComment:
			if value, ok := opt.Expr.(*driver.ValueExpr); ok {
				comment = value.GetString()
			}
		}
	}

	// Build TypeName with modifiers for proper formatting
	typeName := &ast.TypeName{Name: types.TypeToStr(def.Tp.GetType(), def.Tp.GetCharset())}

	// Add type modifiers (e.g., length for varchar(255), char(32))
	// Only for types where length is meaningful and user-specified
	tp := def.Tp.GetType()
	flen := def.Tp.GetFlen()
	needsLength := false
	switch tp {
	case mysql.TypeVarchar, mysql.TypeString, mysql.TypeVarString:
		// VARCHAR(n), CHAR(n) - always need length
		needsLength = flen >= 0
	case mysql.TypeBlob, mysql.TypeTinyBlob, mysql.TypeMediumBlob, mysql.TypeLongBlob:
		// BLOB types - only if user specified length (VARBINARY(n), BINARY(n))
		// Default blob types don't need length
		needsLength = false
	}

	if needsLength {
		typeName.Typmods = &ast.List{
			Items: []ast.Node{
				&ast.Integer{Ival: int64(flen)},
			},
		}
	}

	columnDef := ast.ColumnDef{
		Colname:    def.Name.String(),
		TypeName:   typeName,
		IsNotNull:  isNotNull(def),
		IsUnsigned: isUnsigned(def),
		Comment:    comment,
		Vals:       vals,
	}
	if def.Tp.GetFlen() >= 0 {
		length := def.Tp.GetFlen()
		columnDef.Length = &length
	}