ScanFilter API – BangDB = NoSQL + AI + Stream

ScanFilter API

ScanFilter Type

Client API

ScanFilter is used to set a few elements for scan. Note this is mainly used for the primary keys. For example if we wish to scan data like following; Range : Key > "abc" and key < "bcde" Limit : 100 (Limit By defines what) Limit By : data size | number of rows Only Key : true (only keys), false (both key and value) Reserved : There is reserved variable, used for certain cases

C++

Selected

Java

Selected

To create scanFilter object

ScanFilter()

To set ScanOperator for skey

void set_skey_op(ScanOperator skey_op) ScanOperator is an enum with values GT, GTE, LT, LTE, EQ, NE Please see more on this at bangdb common

To get ScanOperator for skey

ScanOperator get_skey_op()

To set ScanOperator for ekey

void set_ekey_op(ScanOperator ekey_op) ScanOperator is an enum with values GT, GTE, LT, LTE, EQ, NE Please see more on this at bangdb common

To get ScanOperator for ekey

ScanOperator get_ekey_op()

To set ScanLimitBy

void set_limit_by(ScanLimitBy limitby) ScanLimitBy is an enum with values LIMIT_INVALID = -1 LIMIT_RESULT_SIZE, LIMIT_RESULT_ROW

To get the set ScanLimitBy value

ScanLimitBy get_limit_by()

To set limit

void set_limit(int limit)

To get the set limit value

int get_limit()

To set key flag

void set_only_key(short flag)

To get status of set key

short get_only_key()

To set reserved value

void set_reserved(int reserved)

To get the value of reserved set

int get_reserved()

To delete ScanFilter object

virtual ~ScanFilter()

To create ScanFilter object

public ScanFilter()

To set ScanOperator for skey

public ScanOperator skeyOp; ScanOperator is an enum with values GT, GTE, LT, LTE, EQ, NE Please see more on this at bangdb common

To set ScanOperator for ekey

public ScanOperator ekeyOp; ScanOperator is an enum with values GT, GTE, LT, LTE, EQ, NE Please see more on this at bangdb common

To set ScanLimitBy

public ScanLimitBy limitBy; ScanLimitBy is an enum with values LIMIT_INVALID = -1 LIMIT_RESULT_SIZE, LIMIT_RESULT_ROW

To set skip Count

public int skipCount;

To set key flag

public int onlyKey;

To set limit

public int limit;

To set filter

public void setFilter()

To close scanfilter

public synchronized void close()