And generates AND conditions.

Expr generate customerize SQL.

NewCond creates an empty condition.

NewWriter creates a new string writer.

Or sets OR conditions.

ErrNotSupportDialectType not supported dialect type errorErrNotSupportDialectType = errors.New("Not supported dialect type") ErrNotUnexpectedUnionConditions using union in a wrong wayErrNotUnexpectedUnionConditions = errors.New("Unexpected conditional fields in UNION query") ErrUnsupportedUnionMembers unexpected members in UNION queryErrUnsupportedUnionMembers = errors.New("Unexpected members in UNION query") ErrUnexpectedSubQuery Unexpected sub-query in SELECT queryErrUnexpectedSubQuery = errors.New("Unexpected sub-query in SELECT query") ErrDialectNotSetUp dialect is not setup yetErrDialectNotSetUp = errors.New("Dialect is not setup yet, try to use `Dialect(dbType)` at first") ErrInvalidLimitation offset or limit is not correct.

ErrNotSupportDialectType not supported dialect type error.

ErrNoNotInConditions no NOT IN params errorErrNoNotInConditions = errors.New("No NOT IN conditions") ErrNoInConditions no IN params errorErrNoInConditions = errors.New("No IN conditions") ErrNeedMoreArguments need more argumentsErrNeedMoreArguments = errors.New("Need more writeTo arguments") ErrNoTableName no table name.

ErrNotSupportType not supported SQL type error.

ErrNoColumnToUpdate no column to updateErrNoColumnToUpdate = errors.New("No column(s) to update") ErrNoValueToInsert no value to insert.

BytesWriter implments Writer and save SQL in bytes.Buffer.

Cond defines an interface.

Writer defines the interface.