// Convert takes a type and a value, and returns the type:
// - nil for NULL value
// - uint64 for unsigned BIGINT values
// - int64 for all other integer values (signed and unsigned)
// - float64 for floating point values that fit in a float
// - []byte for everything else
func Convert(field *querypb.Field, val sqltypes.Value) (interface{}, error) {
if field.Type == sqltypes.Null {
return nil, nil
} else if sqltypes.IsSigned(field.Type) {
return strconv.ParseInt(val.String(), 0, 64)
} else if sqltypes.IsUnsigned(field.Type) {
return strconv.ParseUint(val.String(), 0, 64)
} else if sqltypes.IsFloat(field.Type) {
return strconv.ParseFloat(val.String(), 64)
}
return val.Raw(), nil
}
// Convert takes a type and a value, and returns the type:
// - nil for NULL value
// - int64 for integer number types that fit in 64 bits
// (signed or unsigned are all converted to signed)
// - float64 for floating point values that fit in a float
// - []byte for everything else
func Convert(mysqlType int64, val sqltypes.Value) (interface{}, error) {
if val.IsNull() {
return nil, nil
}
switch mysqlType {
case VT_TINY, VT_SHORT, VT_LONG, VT_LONGLONG, VT_INT24:
return strconv.ParseInt(val.String(), 0, 64)
case VT_FLOAT, VT_DOUBLE:
return strconv.ParseFloat(val.String(), 64)
}
return val.Raw(), nil
}
// AddColumn adds a column to the Table.
func (ta *Table) AddColumn(name string, columnType querypb.Type, defval sqltypes.Value, extra string) {
index := len(ta.Columns)
ta.Columns = append(ta.Columns, TableColumn{Name: strings.ToLower(name)})
ta.Columns[index].Type = columnType
if extra == "auto_increment" {
ta.Columns[index].IsAuto = true
// Ignore default value, if any
return
}
if defval.IsNull() {
return
}
// Schema values are trusted.
ta.Columns[index].Default = sqltypes.MakeTrusted(ta.Columns[index].Type, defval.Raw())
}
// AddColumn adds a column to the Table.
func (ta *Table) AddColumn(name string, columnType querypb.Type, defval sqltypes.Value, extra string) {
index := len(ta.Columns)
ta.Columns = append(ta.Columns, TableColumn{Name: name})
ta.Columns[index].Type = columnType
if extra == "auto_increment" {
ta.Columns[index].IsAuto = true
// Ignore default value, if any
return
}
if defval.IsNull() {
return
}
if sqltypes.IsIntegral(ta.Columns[index].Type) {
ta.Columns[index].Default = sqltypes.MakeNumeric(defval.Raw())
} else {
ta.Columns[index].Default = sqltypes.MakeString(defval.Raw())
}
}
// Convert takes a type and a value, and returns the type:
// - nil for NULL value
// - uint64 for unsigned BIGINT values
// - int64 for all other integer values (signed and unsigned)
// - float64 for floating point values that fit in a float
// - []byte for everything else
func Convert(field Field, val sqltypes.Value) (interface{}, error) {
if val.IsNull() {
return nil, nil
}
switch field.Type {
case VT_LONGLONG:
if field.Flags&VT_UNSIGNED_FLAG == VT_UNSIGNED_FLAG {
return strconv.ParseUint(val.String(), 0, 64)
}
return strconv.ParseInt(val.String(), 0, 64)
case VT_TINY, VT_SHORT, VT_LONG, VT_INT24:
// Regardless of whether UNSIGNED_FLAG is set in field.Flags, we map all
// signed and unsigned values to a signed Go type because
// - Go doesn't officially support uint64 in their SQL interface
// - there is no loss of the value
// The only exception we make are for unsigned BIGINTs, see VT_LONGLONG above.
return strconv.ParseInt(val.String(), 0, 64)
case VT_FLOAT, VT_DOUBLE:
return strconv.ParseFloat(val.String(), 64)
}
return val.Raw(), nil
}
func (ta *Table) AddColumn(name string, columnType string, defval sqltypes.Value, extra string) {
index := len(ta.Columns)
ta.Columns = append(ta.Columns, TableColumn{Name: name})
if strings.Contains(columnType, "int") {
ta.Columns[index].Category = CAT_NUMBER
} else if strings.HasPrefix(columnType, "varbinary") {
ta.Columns[index].Category = CAT_VARBINARY
} else {
ta.Columns[index].Category = CAT_OTHER
}
if extra == "auto_increment" {
ta.Columns[index].IsAuto = true
// Ignore default value, if any
return
}
if defval.IsNull() {
return
}
if ta.Columns[index].Category == CAT_NUMBER {
ta.Columns[index].Default = sqltypes.MakeNumeric(defval.Raw())
} else {
ta.Columns[index].Default = sqltypes.MakeString(defval.Raw())
}
}
// getWhereClause returns a whereClause based on desired upper and lower
// bounds for primary key.
func (qs *QuerySplitter) getWhereClause(whereClause *sqlparser.Where, bindVars map[string]interface{}, start, end sqltypes.Value) *sqlparser.Where {
var startClause *sqlparser.ComparisonExpr
var endClause *sqlparser.ComparisonExpr
var clauses sqlparser.BoolExpr
// No upper or lower bound, just return the where clause of original query
if start.IsNull() && end.IsNull() {
return whereClause
}
pk := &sqlparser.ColName{
Name: sqlparser.SQLName(qs.splitColumn),
}
if !start.IsNull() {
startClause = &sqlparser.ComparisonExpr{
Operator: sqlparser.GreaterEqualStr,
Left: pk,
Right: sqlparser.ValArg([]byte(":" + startBindVarName)),
}
if start.IsNumeric() {
v, _ := start.ParseInt64()
bindVars[startBindVarName] = v
} else if start.IsString() {
bindVars[startBindVarName] = start.Raw()
} else if start.IsFractional() {
v, _ := start.ParseFloat64()
bindVars[startBindVarName] = v
}
}
// splitColumn < end
if !end.IsNull() {
endClause = &sqlparser.ComparisonExpr{
Operator: sqlparser.LessThanStr,
Left: pk,
Right: sqlparser.ValArg([]byte(":" + endBindVarName)),
}
if end.IsNumeric() {
v, _ := end.ParseInt64()
bindVars[endBindVarName] = v
} else if end.IsString() {
bindVars[endBindVarName] = end.Raw()
} else if end.IsFractional() {
v, _ := end.ParseFloat64()
bindVars[endBindVarName] = v
}
}
if startClause == nil {
clauses = endClause
} else {
if endClause == nil {
clauses = startClause
} else {
// splitColumn >= start AND splitColumn < end
clauses = &sqlparser.AndExpr{
Left: startClause,
Right: endClause,
}
}
}
if whereClause != nil {
clauses = &sqlparser.AndExpr{
Left: &sqlparser.ParenBoolExpr{Expr: whereClause.Expr},
Right: &sqlparser.ParenBoolExpr{Expr: clauses},
}
}
return &sqlparser.Where{
Type: sqlparser.WhereStr,
Expr: clauses,
}
}