144 lines
2.8 KiB
Go
144 lines
2.8 KiB
Go
package sqlbuilder
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import (
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"database/sql"
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"errors"
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"github.com/go-jet/jet/sqlbuilder/execution"
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)
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type UpdateStatement interface {
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Statement
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SET(values ...interface{}) UpdateStatement
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WHERE(expression BoolExpression) UpdateStatement
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RETURNING(projections ...projection) UpdateStatement
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}
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func newUpdateStatement(table WritableTable, columns []Column) UpdateStatement {
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return &updateStatementImpl{
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table: table,
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columns: columns,
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}
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}
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type updateStatementImpl struct {
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table WritableTable
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columns []Column
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updateValues []clause
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where BoolExpression
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returning []projection
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}
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func (u *updateStatementImpl) SET(values ...interface{}) UpdateStatement {
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for _, value := range values {
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if clause, ok := value.(clause); ok {
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u.updateValues = append(u.updateValues, clause)
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} else {
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u.updateValues = append(u.updateValues, literal(value))
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}
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}
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return u
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}
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func (u *updateStatementImpl) WHERE(expression BoolExpression) UpdateStatement {
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u.where = expression
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return u
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}
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func (u *updateStatementImpl) RETURNING(projections ...projection) UpdateStatement {
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u.returning = defaultProjectionAliasing(projections)
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return u
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}
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func (u *updateStatementImpl) Sql() (sql string, args []interface{}, err error) {
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out := &queryData{}
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out.nextLine()
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out.writeString("UPDATE")
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if u.table == nil {
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return "", nil, errors.New("nil tableName.")
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}
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if err = u.table.serialize(update_statement, out); err != nil {
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return
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}
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if len(u.updateValues) == 0 {
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return "", nil, errors.New("No column updated.")
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}
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out.writeString("SET")
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if len(u.columns) > 1 {
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out.writeString("(")
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}
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err = serializeColumnList(update_statement, u.columns, out)
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if err != nil {
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return "", nil, err
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}
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if len(u.columns) > 1 {
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out.writeString(")")
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}
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out.writeString("=")
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if len(u.updateValues) > 1 {
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out.writeString("(")
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}
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for i, value := range u.updateValues {
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if i > 0 {
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out.writeString(", ")
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}
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err = value.serialize(update_statement, out)
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if err != nil {
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return
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}
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}
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if len(u.updateValues) > 1 {
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out.writeString(")")
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}
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if u.where == nil {
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return "", nil, errors.New("Updating without a WHERE clause.")
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}
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if err = out.writeWhere(update_statement, u.where); err != nil {
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return
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}
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if len(u.returning) > 0 {
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out.nextLine()
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out.writeString("RETURNING")
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err = serializeProjectionList(update_statement, u.returning, out)
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if err != nil {
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return
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}
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}
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sql, args = out.finalize()
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return
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}
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func (u *updateStatementImpl) DebugSql() (query string, err error) {
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return DebugSql(u)
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}
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func (u *updateStatementImpl) Query(db execution.Db, destination interface{}) error {
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return Query(u, db, destination)
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}
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func (u *updateStatementImpl) Execute(db execution.Db) (res sql.Result, err error) {
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return Execute(u, db)
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}
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