Help Center/ GaussDB/ Developer Guide(Centralized_2.x)/ SQL Reference/ Functions and Operators/ Ledger Database Functions
Updated on 2023-10-23 GMT+08:00
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Ledger Database Functions

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  • get_dn_hist_relhash(text, text)

    Description: Returns the hash value of table-level data in a specified tamper-proof user table. This function is used only in distributed mode.

    Parameter type: text

    Return type: hash16

  • ledger_hist_check(text, text)

    Description: Verifies the consistency between the hash value of table-level data in a specified tamper-proof user table and that in the corresponding history table.

    Parameter type: text

    Return type: Boolean

  • ledger_hist_repair(text, text)

    Description: Restores the hash value of the history table corresponding to the specified tamper-proof user table to be the same as that of the user table, and returns the hash difference.

    Parameter type: text

    Return type: hash16

  • ledger_hist_archive(text, text)

    Description: Archives the history table corresponding to a specified tamper-proof user table to the hist_back folder in the audit log directory.

    Parameter type: text

    Return type: Boolean

  • ledger_gchain_check(text, text)

    Description: Verifies the consistency between the history table hash corresponding to the specified tamper-proof user table and the relhash corresponding to the global history table.

    Parameter type: text

    Return type: Boolean

  • ledger_gchain_repair(text, text)

    Description: Restores relhash of a specified tamper-proof user table in the global history table so that the hash is the same as that in the history table, and returns the hash difference.

    Parameter type: text

    Return type: hash16

  • ledger_gchain_archive(void)

    Description: Archives global history tables to the hist_back folder in the audit log directory.

    Parameter type: void

    Return type: Boolean

  • hash16in(cstring)

    Description: Converts the input hexadecimal string into the internal hash16 format.

    Parameter type: cstring

    Return type: hash16

  • hash16out(hash16)

    Description: Converts internal hash16 data to hexadecimal cstring data.

    Parameter type: hash16

    Return type: cstring

  • hash32in(cstring)

    Description: Converts the input hexadecimal string (32 characters) into the internal type hash32.

    Parameter type: cstring

    Return type: hash32

  • hash32out(hash32)

    Description: Converts internal hash32 data to hexadecimal cstring data.

    Parameter type: cstring

    Return type: hash32

Parent topic: Functions and Operators