Help Center/ GaussDB/ Developer Guide(Centralized_8.x)/ SQL Reference/ Functions and Operators/ Encrypted Functions and Operators
Updated on 2024-08-20 GMT+08:00
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Encrypted Functions and Operators

  • byteawithoutorderwithequalcolin(cstring)

    Description: Converts input data to the internal byteawithoutorderwithequalcol format.

    Parameter type: cstring

    Return type: byteawithoutorderwithequalcol

  • byteawithoutorderwithequalcolout(byteawithoutorderwithequalcol)

    Description: Converts internal data of the byteawithoutorderwithequalcol type to data of the cstring type.

    Parameter type: byteawithoutorderwithequalcol

    Return type: cstring

  • byteawithoutorderwithequalcolsend(byteawithoutorderwithequalcol)

    Description: Converts data of the byteawithoutorderwithequalcol type to data of the bytea type.

    Parameter type: byteawithoutorderwithequalcol

    Return type: bytea

  • byteawithoutorderwithequalcolrecv(internal)

    Description: Converts data of the internal type to data of the byteawithoutorderwithequalcol type.

    Parameter type: internal

    Return type: byteawithoutorderwithequalcol

  • byteawithoutorderwithequalcoltypmodin(cstring[])

    Description: Converts data of the cstring[] type to data of the byteawithoutorderwithequalcol type.

    Parameter type: cstring[]

    Return type: int4

  • byteawithoutorderwithequalcoltypmodout(int4)

    Description: Converts data of the int4 type into data of the cstring type.

    Parameter type: int4

    Return type: cstring

  • byteawithoutordercolin(cstring)

    Description: Converts input data to the internal byteawithoutordercolin format.

    Parameter type: cstring

    Return type: byteawithoutordercol

  • byteawithoutordercolout(byteawithoutordercol)

    Description: Converts internal data of the byteawithoutordercol type to data of the cstring type.

    Parameter type: byteawithoutordercol

    Return type: cstring

  • byteawithoutordercolsend(byteawithoutordercol)

    Description: Converts data of the byteawithoutordercol type to data of the bytea type.

    Parameter type: byteawithoutordercol

    Return type: bytea

  • byteawithoutordercolrecv(internal)

    Description: Converts data of the internal type to data of the byteawithoutordercol type.

    Parameter type: internal

    Return type: byteawithoutordercol

  • byteawithoutorderwithequalcolcmp(byteawithoutorderwithequalcol, byteawithoutorderwithequalcol)

    Description: Compares two byteawithoutorderwithequalcol data sizes. If the first data size is smaller than the second one, –1 is returned. If the first data size is equal to the second one, 0 is returned. If the first data size is larger than the second one, 1 is returned.

    Parameter type: byteawithoutorderwithequalcol, byteawithoutorderwithequalcol

    Return type: int4

  • byteawithoutorderwithequalcolcmpbytear(byteawithoutorderwithequalcol, bytea)

    Description: Compares the byteawithoutorderwithequalcol and bytea data sizes. If the first data size is smaller than the second one, –1 is returned. If the first data size is equal to the second one, 0 is returned. If the first data size is larger than the second one, 1 is returned.

    Parameter type: byteawithoutorderwithequalcol or bytea

    Return type: int4

  • byteawithoutorderwithequalcolcmpbyteal(bytea, byteawithoutorderwithequalcol)

    Description: Compares the bytea and byteawithoutorderwithequalcol data sizes. If the first data size is smaller than the second one, –1 is returned. If the first data size is equal to the second one, 0 is returned. If the first data size is larger than the second one, 1 is returned.

    Parameter type: bytea, byteawithoutorderwithequalcol

    Return type: int4

  • byteawithoutorderwithequalcoleq(byteawithoutorderwithequalcol, byteawithoutorderwithequalcol)

    Description: Compares two byteawithoutorderwithequalcol data records. If they are the same, true is returned. Otherwise, false is returned.

    Parameter type: byteawithoutorderwithequalcol, byteawithoutorderwithequalcol

    Return type: Boolean

  • byteawithoutorderwithequalcoleqbyteal(bytea, byteawithoutorderwithequalcol)

    Description: Compares the bytea and byteawithoutorderwithequalcol data records. If they are the same, true is returned. Otherwise, false is returned.

    Parameter type: bytea, byteawithoutorderwithequalcol

    Return type: Boolean

  • byteawithoutorderwithequalcoleqbytear(byteawithoutorderwithequalcol, bytea)

    Description: Compares the byteawithoutorderwithequalcol and bytea data records. If they are the same, true is returned. Otherwise, false is returned.

    Parameter type: byteawithoutorderwithequalcol, bytea

    Return type: Boolean

  • byteawithoutorderwithequalcolne(byteawithoutorderwithequalcol, byteawithoutorderwithequalcol)

    Description: Compares two byteawithoutorderwithequalcol data records. If they are different, true is returned. Otherwise, false is returned.

    Parameter type: byteawithoutorderwithequalcol, byteawithoutorderwithequalcol

    Return type: Boolean

  • byteawithoutorderwithequalcolnebyteal(bytea, byteawithoutorderwithequalcol)

    Description: Compares the bytea and byteawithoutorderwithequalcol data records. If they are the same, true is returned. Otherwise, false is returned.

    Parameter type: bytea, byteawithoutorderwithequalcol

    Return type: Boolean

  • byteawithoutorderwithequalcolnebytear(byteawithoutorderwithequalcol, bytea)

    Description: Compares the byteawithoutorderwithequalcol and bytea data records. If they are the same, true is returned. Otherwise, false is returned.

    Parameter type: byteawithoutorderwithequalcol, bytea

    Return type: Boolean

  • hll_hash_byteawithoutorderwithequalcol(byteawithoutorderwithequalcol)

    Description: Returns the hll hash value of byteawithoutorderwithequalcol.

    Parameter type: byteawithoutorderwithequalcol

    Return type: hll_hashval

  • tee_lt(byteawithoutorderwithequalcol, byteawithoutorderwithequalcol)

    Description: Checks whether a value of the byteawithoutorderwithequalcol type is less than another value of the byteawithoutorderwithequalcol type. If yes, true is returned. Otherwise, false is returned. This function is used for parsing the encrypted operator "<" only when the memory decryption emergency channel is enabled. This function cannot be directly used.

    Parameter type: byteawithoutorderwithequalcol, byteawithoutorderwithequalcol

    Return type: Boolean

  • tee_gt(byteawithoutorderwithequalcol, byteawithoutorderwithequalcol)

    Description: Checks whether a value of the byteawithoutorderwithequalcol type is greater than another value of the byteawithoutorderwithequalcol type. If yes, true is returned. Otherwise, false is returned. This function is used for parsing the encrypted operator ">" only when the memory decryption emergency channel is enabled. This function cannot be directly used.

    Parameter type: byteawithoutorderwithequalcol, byteawithoutorderwithequalcol

    Return type: Boolean

  • tee_le(byteawithoutorderwithequalcol, byteawithoutorderwithequalcol)

    Description: Checks whether a value of the byteawithoutorderwithequalcol type is less than or equal to another value of the byteawithoutorderwithequalcol type. If yes, true is returned. Otherwise, false is returned. This function is used for parsing the encrypted operator "<=" only when the memory decryption emergency channel is enabled. This function cannot be directly used.

    Parameter type: byteawithoutorderwithequalcol, byteawithoutorderwithequalcol

    Return type: Boolean

  • tee_ge(byteawithoutorderwithequalcol, byteawithoutorderwithequalcol)

    Description: Checks whether a value of the byteawithoutorderwithequalcol type is greater than or equal to another value of the byteawithoutorderwithequalcol type. If yes, true is returned. Otherwise, false is returned. This function is used for parsing the encrypted operator ">=" only when the memory decryption emergency channel is enabled. This function cannot be directly used.

    Parameter type: byteawithoutorderwithequalcol, byteawithoutorderwithequalcol

    Return type: Boolean

  • tee_like(byteawithoutorderwithequalcol, byteawithoutorderwithequalcol)

    Description: Checks whether byteawithoutorderwithequalcol data meets fuzzy match. If yes, true is returned. Otherwise, false is returned. This function cannot be directly used.

    Parameter type: byteawithoutorderwithequalcol, byteawithoutorderwithequalcol

    Return type: Boolean

  • tee_nlike(byteawithoutorderwithequalcol, byteawithoutorderwithequalcol)

    Description: Checks whether byteawithoutorderwithequalcol data does not meet fuzzy match. If yes, true is returned. Otherwise, false is returned. This function cannot be directly used.

    Parameter type: byteawithoutorderwithequalcol, byteawithoutorderwithequalcol

    Return type: Boolean

  • tee_calculation(byteawithoutorderwithequalcol, byteawithoutorderwithequalcol)

    Description: General function for mathematical operations between byteawithoutorderwithequalcol types. This function cannot be directly used.

    Parameter type: byteawithoutorderwithequalcol, byteawithoutorderwithequalcol

    Return type: byteawithoutorderwithequalcol

  • tee_sortsupport(internal)

    Description: Function used to support sorting, which is internally invoked during sorting and cannot be invoked by users.

    Parameter type: internal

    Return type: void

  • teegtsel(internal, oid, internal, integer)

    Description: Selection rate of ciphertext greater than and greater than or equal to. The default value 0.3333333333333333 is returned. This function cannot be invoked by common users.

    Parameter type: internal, oid, internal, integer

    Return type: double precision

  • teeltsel(internal, oid, internal, integer)

    Description: Selection rate of ciphertext less than and less than or equal to. The default value 0.3333333333333333 is returned. This function cannot be invoked by common users.

    Parameter type: internal, oid, internal, integer

    Return type: double precision

  • teelikesel(internal, oid, internal, integer)

    Description: Selection rate of ciphertext fuzzy match. The default value 0.005 is returned. This function cannot be invoked by common users.

    Parameter type: internal, oid, internal, integer

    Return type: double precision

  • teenlikesel(internal, oid, internal, integer)

    Description: Selection rate of ciphertext non-fuzzy-match. The default value 0.005 is returned. This function cannot be invoked by common users.

    Parameter type: internal, oid, internal, integer

    Return type: double precision

  • sum(byteawithoutorderwithequalcol)

    Description: Aggregates the ciphertext sum. It is not supported in the current version.

    Parameter type: byteawithoutorderwithequalcol

    Return type: byteawithoutorderwithequalcol

  • avg(byteawithoutorderwithequalcol)

    Description: Aggregates the ciphertext average value. It is not supported in the current version.

    Parameter type: byteawithoutorderwithequalcol

    Return type: byteawithoutorderwithequalcol

  • min(byteawithoutorderwithequalcol)

    Description: Aggregates the ciphertext minimum value. It is not supported in the current version.

    Parameter type: byteawithoutorderwithequalcol

    Return type: byteawithoutorderwithequalcol

  • max(byteawithoutorderwithequalcol)

    Description: Aggregates the ciphertext maximum value. It is not supported in the current version.

    Parameter type: byteawithoutorderwithequalcol

    Return type: byteawithoutorderwithequalcol

  • stddev_samp(byteawithoutorderwithequalcol)

    Description: Aggregates the standard deviation of ciphertext samples. It is not supported in the current version.

    Parameter type: byteawithoutorderwithequalcol

    Return type: byteawithoutorderwithequalcol

  • stddev_pop(byteawithoutorderwithequalcol)

    Description: Aggregates the total standard deviation of ciphertext. It is not supported in the current version.

    Parameter type: byteawithoutorderwithequalcol

    Return type: byteawithoutorderwithequalcol

  • var_samp(byteawithoutorderwithequalcol)

    Description: Aggregates the variance of ciphertext samples. It is not supported in the current version.

    Parameter type: byteawithoutorderwithequalcol

    Return type: byteawithoutorderwithequalcol

  • var_pop(byteawithoutorderwithequalcol)

    Description: Aggregates the total variance of ciphertext. It is not supported in the current version.

    Parameter type: byteawithoutorderwithequalcol

    Return type: byteawithoutorderwithequalcol

  • tee_trans(byteawithoutorderwithequalcol, byteawithoutorderwithequalcol)

    Description: Aggregates the internal processing function for ciphertext. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, byteawithoutorderwithequalcol

    Return type: byteawithoutorderwithequalcol

  • tee_collect(byteawithoutorderwithequalcol, byteawithoutorderwithequalcol)

    Description: Aggregates the internal processing function for ciphertext. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, byteawithoutorderwithequalcol

    Return type: byteawithoutorderwithequalcol

  • tee_final(byteawithoutorderwithequalcol)

    Description: Aggregates the internal processing function for ciphertext. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol

    Return type: byteawithoutorderwithequalcol

  • security_tee_process()

    Description: Manages the computational state in a secret trusted domain. It is not supported in the current version.

    Parameter type: int

    Return type: Boolean

  • ce_encrypt_deterministic(text, oid)

    Description: Encrypts the plaintext of the text type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: text, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

    For details, see "Migrate plaintext and ciphertext columns to each other." in "Memory Decryption Emergency Channel > Using gsql to Operate the Memory Decryption Emergency Channel" in Feature Guide.

  • ce_encrypt_deterministic(int1, oid)

    Description: Encrypts the plaintext of the int1 type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: int1, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_deterministic(int2, oid)

    Description: Encrypts the plaintext of the int2 type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: int2, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_deterministic(int4, oid)

    Description: Encrypts the plaintext of the int4 type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: int4, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_deterministic(int8, oid)

    Description: Encrypts the plaintext of the int8 type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: int8, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_deterministic(float4, oid)

    Description: Encrypts the plaintext of the float4 type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: float4, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_deterministic(float8, oid)

    Description: Encrypts the plaintext of the float8 type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: float8, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_deterministic(numeric, oid)

    Description: Encrypts the plaintext of the numeric type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: numeric, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_deterministic(clob, oid)

    Description: Encrypts the plaintext of the CLOB type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: clob, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_deterministic(varchar, oid)

    Description: Encrypts the plaintext of the varchar type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: varchar, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_deterministic(nvarchar2, oid)

    Description: Encrypts the plaintext of the nvarchar2 type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: nvarchar2, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_deterministic(bpchar, oid)

    Description: Encrypts the plaintext of the bpchar type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: bpchar, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_deterministic(nvarchar2, oid)

    Description: Encrypts the plaintext of the nvarchar2 type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: nvarchar2, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_deterministic(bytea, oid)

    Description: Encrypts the plaintext of the bytea type to the encrypted equivalent structure. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: bytea, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: byteawithoutorderwithequalcol

  • ce_decrypt_deterministic(byteawithoutorderwithequalcol, oid)

    Description: Decrypts the ciphertext of the encrypted equivalent structure to the plaintext data of the text type. The key OID is the value of column_key_distributed_id in the gs_column_keys system catalog. If the input parameter is NULL, NULL is returned.

    Parameter type: byteawithoutorderwithequalcol, oid

    Note: This is used only when the memory decryption emergency channel is enabled.

    Return type: text

    For details, see "Migrate plaintext and ciphertext columns to each other." in "Memory Decryption Emergency Channel > Using gsql to Operate the Memory Decryption Emergency Channel" in Feature Guide.

    The following functions starting with ce_encrypt/ce_decrypt exist in the pg_catalog namespace.

  • ce_encrypt_text(text, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: text, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_varchar(varchar, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: varchar, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_nvarchar2(nvarchar2, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: nvarchar2, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_bpchar(bpchar, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: bpchar, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_int1(int1, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: int1, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_int2(int2, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: int2, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_int4(int4, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: int4, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_int8(int8, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: int8, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_float4(float4, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: float4, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_float8(float8, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: float8, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_numeric(numeric, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: numeric, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_bytea(bytea, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: bytea, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_encrypt_clob(clob, int4, boolean, int4, internal)

    Description: Encryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: clob, int4, boolean, int4, internal

    Return type: byteawithoutorderwithequalcol

  • ce_decrypt_text(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: text

  • ce_decrypt_varchar(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: varchar

  • ce_decrypt_nvarchar2(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: nvarchar2

  • ce_decrypt_bpchar(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: bpchar

  • ce_decrypt_int1(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: int1

  • ce_decrypt_int2(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: int2

  • ce_decrypt_int4(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: int4

  • ce_decrypt_int8(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: int8

  • ce_decrypt_float4(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: float4

  • ce_decrypt_float8(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: float8

  • ce_decrypt_numeric(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: numeric

  • ce_decrypt_bytea(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: bytea

  • ce_decrypt_clob(byteawithoutorderwithequalcol, int4, boolean, int4, internal)

    Description: Decryption function for fully-encrypted type conversion. This function cannot be invoked by common users.

    Parameter type: byteawithoutorderwithequalcol, int4, boolean, int4, internal

    Return type: clob

Examples

Encrypted equality functions such as byteawithoutorderwithequalcolin and byteawithoutorderwithequalcolout are read/write format conversion functions such as in, out, send, and recv specified by the data type byteawithoutorderwithequalcol in the database kernel. For details, see the byteain and byteaout functions of the bytea type. However, the local CEK is verified, and the function can be successfully executed only when the encrypted column contains a cekoid that exists on the local host.

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-- For example, if the int_type encrypted table exists, int_col2 is the encrypted column.

-- Use a non-encrypted client to connect to the database and query the ciphertext of the encrypted column.
gaussdb=# SELECT int_col2 FROM int_type;
                                                                       int_col2
------------------------------------------------------------------------------------------------------------------------------------------------------
 \x01c35301bf421c8edf38c34704bcc82838742917778ccb402a1b7452ad4a6ac7371acc0ac33100000035fe3424919854c86194f1aa5bb4e1ca656e8fc6d05324a1419b69f488bdc3c6
(1 row)

-- The ciphertext of the encrypted column is used as the input parameter of byteawithoutorderwithequalcolin. The format is converted from cstring to byteawithoutorderwithequalcol.
gaussdb=# SELECT byteawithoutorderwithequalcolin('\x01c35301bf421c8edf38c34704bcc82838742917778ccb402a1b7452ad4a6ac7371acc0ac33100000035fe3424919854c86194f1aa5bb4e1ca656e8fc6d05324a1419b69f488bdc3c6');
                                                           byteawithoutorderwithequalcolin
------------------------------------------------------------------------------------------------------------------------------------------------------
 \x01c35301bf421c8edf38c34704bcc82838742917778ccb402a1b7452ad4a6ac7371acc0ac33100000035fe3424919854c86194f1aa5bb4e1ca656e8fc6d05324a1419b69f488bdc3c6
(1 row)

Implementations such as byteawithoutorderwithequalcolin search for CEK and determine whether it is a normal encrypted data type.

Therefore, if the format of the input data is not the encrypted data format and the corresponding CEK does not exist on the local host, an error is returned.

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gaussdb=# SELECT * FROM byteawithoutorderwithequalcolsend('\x907219912381298461289346129'::byteawithoutorderwithequalcol);
ERROR:  cek with OID 596711794 not found
LINE 1: SELECT * FROM byteawithoutorderwithequalcolsend('\x907219912...
                                                        ^
gaussdb=# SELECT * FROM byteawithoutordercolout('\x90721901999999999999912381298461289346129');
ERROR:  cek with OID 2566986098 not found
LINE 1: SELECT * FROM byteawithoutordercolout('\x9072190199999999999...
   
gaussdb=# SELECT * FROM byteawithoutorderwithequalcolrecv('\x90721901999999999999912381298461289346129'::byteawithoutorderwithequalcol);
ERROR:  cek with OID 2566986098 not found
                                           ^
gaussdb=# SELECT * FROM byteawithoutorderwithequalcolsend('\x90721901999999999999912381298461289346129'::byteawithoutorderwithequalcol);
ERROR:  cek with OID 2566986098 not found
LINE 1: SELECT * FROM byteawithoutorderwithequalcolsend('\x907219019...
                                                        ^
Parent topic: Functions and Operators