The CHANGE command changes fields of a block, file, or record header.

The format of the CHANGE command is:

         CH[ANGE]
        

The CHANGE command either has a -FILEHEADER qualifier or an implicit or explicit -BLOCK qualifier, plus one or more of their associated qualifiers, to define the target of the change.

-BL[OCK]=block-number and one or more of the following qualifiers:

-BS[IZ]=block-size

-L[EVEL]=level

-TN[=transaction-number]

-OF[FSET]=offset

-RE[CORD]=record-number

-CM[PC]=compression-count

-RS[IZ]=record-size

or

-F[ILEHEADER] and one or more of the following qualifiers:

-BLK[_SIZE ]=block-size

-BLO[CKS_FREE]=free-blocks

-B_B[YTESTREAM]=transaction-number

-B_C[OMPREHENSIVE]=transaction-number

-B_D[ATABASE]=transaction-number

-B_I[NCREMENTAL]=transaction-number

-B_R[ECORD]=transaction-number

-CU[RRENT_TN]=transaction-number

-DEF[_COLLATION]=value

-FL[USH_TIME][=delta-time]

-FR[EEZE]=value

-K[EY_MAX_SIZE]=key-max-size

-M[ACHINE_NAM]=value

-NO[CRIT]

-N[ULL_SUBSCRIPTS]=value

-OV[ERRIDE]

-REC[ORD_MAX_SIZE]=record-max-size

-REF[ERENCE_COUNT]=reference-count

-REG[_SEQNO]=sequence-number

-RESYNC_S[EQNO]=sequence-number

-RESYNC-T[N]=sequence-number

-TIM[ERS_PENDING]=integer

-TO[TAL_BLKS]=total-blocks

-TR[IGGER_FLUSH]=trigger-flus

-W[RITES_PER_FLUSH]=writes-per-flush