CN112256694B - Hive table state changing method and device - Google Patents
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
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Abstract
The invention discloses a method and a device for changing the state of a Hive table, relates to the technical field of big data, and can realize the function of forbidding or starting the Hive table. The method comprises the following steps: the server receives a Hive table operation instruction sent by the client, wherein the Hive table operation instruction comprises a table state changing instruction and/or a table state query instruction; the server side judges whether to execute state change on the target table according to the target table name, the operation user and the state to be changed of the target table in the table state change instruction, and feeds back an execution result to the client side after execution; and/or the server side inquires the current state of the target table according to the target table name in the table state inquiry instruction and the operation user and feeds the inquiry result back to the client side. The device is applied with the method provided by the scheme.
Description
Technical Field
The invention relates to the technical field of big data, in particular to a Hive table state changing method and device.
Background
Hive is a data warehouse tool based on Hadoop, and can map structured data files into a database table and provide SQL-like query functions. The data tables are divided into an internal table and an external table, and the essential difference is whether the inside of the table data file is deleted together when the Hive table is deleted. While the use of the drop table tableName statement can realize the deletion operation of the Hive table, when the drop statement is executed regardless of the internal table or the external table, the metadata information such as the field name, the field type, and the storage path of the table data file on the HDFS is immediately deleted, and the gray level deletion cannot be realized.
The Hive open source community does not provide the table disabling and enabling functions like HBase, the table degrading operation cannot be realized, the most obvious defect is that the gray level deletion of the Hive table cannot be realized, and therefore the possibility that the Hive table is deleted by mistake is increased.
Disclosure of Invention
The invention aims to provide a method and a device for changing the state of a Hive table, which can realize the function of forbidding or enabling the Hive table.
In order to achieve the above object, a first aspect of the present invention provides a method for changing a Hive table state, including:
the method comprises the steps that a server receives Hive table operation instructions sent by a client, wherein the Hive table operation instructions comprise table state changing instructions and/or table state query instructions;
the server side judges whether to execute state change on the target table according to the target table name, the operation user and the state to be changed of the target table in the table state change instruction, and feeds back an execution result to the client side after execution; and/or the presence of a gas in the gas,
and the server side inquires the current state of the target table and feeds back the inquiry result to the client side according to the target table name and the operation user in the table state inquiry command.
Preferably, the table state change instruction includes a table disable change instruction and a table enable change instruction, the table disable change instruction is a disable command, and the table enable change instruction is an enable command.
Preferably, the method for the server to determine whether to execute the state change on the target table according to the target table name, the operating user and the state to be changed of the target table in the table state change instruction, and to feed back the execution result to the client after execution includes:
the method comprises the steps that a server side is based on a target table name, an operating user and a state to be changed of a target table in a disable command, when the target table exists, the current operating user has an operating authority and the current state of the target table is an enabled state, the state of the target table is modified into a disabled state by modifying attribute parameters of the target table, wherein the attribute parameters comprise the current table state, the modification time of the current table state or retention time when the current table state is disabled;
the service end is based on the target table name, the operation user and the state to be changed of the target table in the enable command, and when the target table exists, the current operation user has the operation authority and the current state of the target table is the forbidden state, the state of the target table is changed into the enabled state by modifying the attribute parameters of the target table;
when the condition that the target table does not exist or the current operation user does not have the operation authority or the target state of the target table is consistent with the current state is inquired, refusing to change the state of the target table;
and the server feeds back the execution result of the target table to the client.
Preferably, the method for the server to query the current state of the target table and feed back the query result to the client according to the target table name and the operation user in the table state query instruction includes:
the current state of the target table comprises a disabled state and an enabled state;
and the server side returns a query result to the client side according to the target table name and the operation user in the table state query instruction when the current state of the target table is the enabled state, and feeds back the disabled state and the prompt which cannot be queried to the client side when the current state of the target table is the disabled state.
Optionally, when the current state of the target table is the disabled state, after feeding back the result of the unable query to the client, the method further includes:
the forbidden state of the target table is divided into an overdue forbidden state and a non-overdue forbidden state;
when the target table is in the state of being forbidden to exceed the period, a prompt that the target table can be deleted is sent to the client through the server, and when the target table is in the state of not being forbidden to exceed the period, a prompt that the target table cannot be operated is sent to the client through the server.
Illustratively, the method for determining whether the target table is in the state of being overdue disabled or not comprises the following steps:
identifying the attribute parameters of the target table, judging that the target table is in a state of being forbidden for a period exceeding when the modification time of the current time and the current table state exceeds a preset interval time threshold, and judging that the target table is in a state of not being forbidden for a period exceeding when the modification time of the current time and the current table state does not exceed the preset interval time threshold.
Preferably, the server side modifies the copy number of the target table while changing the state of the target table.
Illustratively, the server is a hivethreftserver.
Compared with the prior art, the Hive table state changing method provided by the invention has the following beneficial effects:
in the Hive table state changing method provided by the invention, a server receives a Hive table operation instruction of a client, judges whether a target table accords with a condition to execute state change according to a target table name, an operation user and a state to be changed of the target table in the table state changing instruction, changes the state of the target table when the target table accords with the condition and feeds back a changing result to the client, and refuses to change the state of the target table when the target table does not accord with the condition and feeds back a refusing result to the client. In addition, the server side can also receive a table state query instruction of the client side, judge whether the target table meets the query condition according to the target table name and the operation user in the table state query instruction, feed back the query result to the client side when the target table meets the query condition, and feed back a query rejection prompt to the client side when the target table does not meet the query condition.
In consideration of the function that the Hive table does not originally support the forbidding and enabling of the table, the scheme can realize the corresponding function through a mode that the server side and the client side interactively execute the table state change instruction to change the attribute parameters of the target table on the basis of not introducing a zookeeper component.
A second aspect of the present invention provides an apparatus for changing a Hive table state, which is applied to the method for changing a Hive table state in the foregoing technical solution, and includes:
the server comprises a sending unit, a receiving unit and a processing unit, wherein the sending unit is used for receiving Hive table operation instructions sent by a client by a server, and the Hive table operation instructions comprise table state changing instructions and/or table state query instructions;
the change unit is used for judging whether to execute state change on the target table or not by the server according to the target table name, the operation user and the state to be changed of the target table in the table state change instruction, and feeding back an execution result to the client after execution;
and the query unit is used for the server side to query the current state of the target table and feed back a query result to the client side according to the target table name, the operation user and the state query of the target table in the table state query instruction.
Compared with the prior art, the beneficial effects of the Hive table state changing device provided by the invention are the same as those of the Hive table state changing method provided by the technical scheme, and are not repeated herein.
A third aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, executes the steps of the Hive table state changing method.
Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the invention are the same as the beneficial effects of the Hive table state changing method provided by the technical scheme, and details are not repeated herein.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not limit the invention. In the drawings:
fig. 1 is a flow diagram illustrating a Hive table state changing method according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Example one
Referring to fig. 1, the present embodiment provides a method for changing a Hive table state, including:
the server receives a Hive table operation instruction sent by a client, wherein the Hive table operation instruction comprises a table state changing instruction and/or a table state query instruction; the server side judges whether to execute state change on the target table according to the target table name, the operation user and the state to be changed of the target table in the table state change instruction, and feeds back an execution result to the client side after execution; and/or the server side inquires the current state of the target table and feeds back the inquiry result to the client side according to the target table name and the operation user in the table state inquiry instruction.
In the Hive table state changing method provided in this embodiment, a server receives a Hive table operation instruction from a client, and determines whether a target table meets a condition to perform state change according to a target table name, an operation user, and a state to be changed of the target table in the table state changing instruction, changes the state of the target table when the target table meets the condition, and feeds back a change result to the client, and rejects changing the state of the target table when the target table does not meet the condition, and feeds back a rejection result to the client. In addition, the server side can also receive a table state query instruction of the client side, judge whether the target table meets the query condition or not according to the target table name and the operation user in the table state query instruction, feed back the query result to the client side when the target table meets the query condition, and feed back a query rejection prompt to the client side when the target table does not meet the query condition.
Considering the disabling and enabling functions of the native unsupported table of the Hive table, on the basis of not introducing a zookeeper component, the method can realize the corresponding disabling and enabling functions by changing the attribute parameters of the target table through the interactive execution table state change instruction of the server and the client, change the attribute parameters of the target table through the execution of disable and enable commands, any operation related to the Hive table needs to call a getTable method to obtain metadata information of the table from a metastore, and add a judgment statement based on the table attribute in the getTable according to the current operation type to execute, so that the disabling and enabling functions are realized.
Specifically, the table state change instruction includes a table disable change instruction and a table enable change instruction, for example, the table disable change instruction is a disable command, the table enable change instruction is an enable command, and the table state query instruction show table status.
In the above embodiment, the method for the server to determine whether to execute the state change on the target table according to the target table name, the operating user, and the state to be changed of the target table in the table state change instruction, and to feed back the execution result to the client after execution includes:
the method comprises the steps that a server side is based on a target table name, an operating user and a state to be changed of a target table in a disable command, when the target table exists, the current operating user has an operating authority and the current state of the target table is an enabled state, the state of the target table is modified into a disabled state by modifying attribute parameters of the target table, wherein the attribute parameters comprise the current table state, the modification time of the current table state or retention time when the current table state is disabled; the service end is based on the target table name, the operation user and the state to be changed of the target table in the enable command, and when the target table exists, the current operation user has the operation authority and the current state of the target table is the forbidden state, the state of the target table is changed into the enabled state by modifying the attribute parameters of the target table; when the condition that the target table does not exist or the current operation user does not have the operation authority or the target state of the target table is consistent with the current state is inquired, refusing to change the state of the target table; and the server side feeds back the execution result of the target table to the client side.
In specific implementation, a disable command is submitted to a server through a client, the server verifies whether a target table exists or not, whether a current operation user has an operation authority or not and whether the current state of the target table is an enabled state or not based on the disable command, and when all the verification results are yes, the target table can be modified into the disabled state, namely, the attribute parameters of the target table are modified, such as the modification time t of the current table state to the disabled state and the current table state 1 Or the retention time n days when the current table state is forbidden is included at the same time, and the number of copies of the target table data file can be selected and adjusted. Similarly, the client can also submit an enable command to the server, the server verifies whether the target table exists, whether the current operation user has the operation authority and whether the current state of the target table is in the forbidden state based on the enable command, and when the verification results are yes, the target table can be modified into the enabled stateThat is, the attribute parameters of the target table are modified, such as the modification time t of the current table state to the enabled state 2 And meanwhile, the number of copies of the target table data file can be selected and adjusted.
Illustratively, when receiving a disable command of the target table, the server sets the attribute parameters of the target table after modifying the state of the target table: the current table state (table. State = "disable"), the modification time of the current table state (table. State. Time = "XXX"), the retention time when the current table state is disabled n days (table. Storage. Day = "n"), if a reasonable number of copies is specified in the command, the number of copies can be adjusted and modified at the same time, and the reasonable number of copies is usually 1 or 2 when the target table is in the disabled state. When the server receives an enable command of the target table, setting attribute parameters of the target table after modifying the state of the target table: the current table state (table.status = "enable"), the modification time of the current table state (table.status.modification.time = "XXX"), the retention time when the current table state is disabled is infinite days (table.storage.day = "99999"), if a reasonable number of copies is specified in the command, the number of copies can be adjusted and modified at the same time, and the reasonable number of copies when the target table is in the enabled state is usually 2 or 3.
In the above embodiment, the method for the server to query the current state of the target table and feed back the query result to the client according to the target table name and the operation user in the table state query instruction includes:
the current state of the target table comprises a disabled state and an enabled state; and the server side returns a query result to the client side according to the target table name and the operation user in the table state query instruction when the current state of the target table is the enabled state, and feeds back a disabled state prompt and a feedback result which cannot be queried to the client side when the current state of the target table is the disabled state. The forbidden state of the target table is divided into an overdue forbidden state and a non-overdue forbidden state; when the target table is in the state of being forbidden to exceed the period, a prompt that the target table can be deleted is sent to the client through the server, and when the target table is in the state of not being forbidden to exceed the period, a prompt that the target table cannot be operated is sent to the client through the server. Illustratively, the delete command is a drop table tableName.
As is well known, the Hive table does not support any operation when being in the disabled state, including query, modification, write, and delete operations, for example, when a user initiates a query request to the target table in the disabled state through a client, the server returns a disable prompt to the client, and at this time, if the user needs to continue to view the target table, the target table may be first modified into the enabled state through the client, and then the query operation is performed.
Further, the method for determining whether the target table is in the state of being disabled for the expiration period or not in the state of being disabled for the expiration period in the embodiment includes:
and identifying attribute parameters of the target table, judging that the target table is in the state of overdue forbidding when the modification time of the current time and the current table state exceeds a preset interval time threshold, and judging that the target table is in the state of not overdue forbidding when the modification time of the current time and the current table state does not exceed the preset interval time threshold.
In specific implementation, it is assumed that the forbidden retention time of the target table is n days, and the last state modification time from the current time to the target table is greater than n days, it indicates that the target table is in an overdue forbidden state and can be deleted, otherwise, it indicates that the target table is in a non-overdue forbidden state and cannot be deleted, it needs to be emphasized that the target table in the overdue forbidden state can only be deleted and cannot perform other operations such as querying, modifying, reading and writing. Illustratively, the delete command is a drop table tableName.
The above embodiment can support the gray deleting function of the Hive table and simultaneously support the downgrade operation of the Hive table by setting the overdue disabled state and the non-overdue disabled state.
Optionally, the server in the foregoing embodiment is a hivetriftserver.
Example two
The embodiment provides a device for changing the state of a Hive table, which comprises:
the server comprises a sending unit, a receiving unit and a processing unit, wherein the sending unit is used for receiving Hive table operation instructions sent by a client by a server, and the Hive table operation instructions comprise table state changing instructions and/or table state query instructions;
the change unit is used for judging whether to execute state change on the target table or not by the server according to the target table name, the operation user and the state to be changed of the target table in the table state change instruction, and feeding back an execution result to the client after execution; and/or the presence of a gas in the gas,
and the query unit is used for the server side to query the current state of the target table and feed back a query result to the client side according to the target table name and the operation user in the table state query instruction.
Compared with the prior art, the beneficial effects of the Hive table state changing device provided by the embodiment of the invention are the same as those of the Hive table state changing method provided by the first embodiment, and are not described herein again.
EXAMPLE III
The present embodiment provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the step of the Hive table state changing method is executed.
Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the embodiment are the same as the beneficial effects of the Hive table state changing method provided by the above technical scheme, and are not described herein again.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the invention may be implemented by hardware that is related to instructions of a program, the program may be stored in a computer-readable storage medium, when the program is executed, the program includes the steps of the method of the embodiment, and the storage medium may be: ROM/RAM, magnetic disks, optical disks, memory cards, and the like.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A method for changing the state of a Hive table is characterized by comprising the following steps:
the method comprises the steps that a server receives Hive table operation instructions sent by a client, wherein the Hive table operation instructions comprise a table state changing instruction and a table state query instruction;
the server side judges whether to execute state change on the target table according to the target table name, the operation user and the state to be changed of the target table in the table state change instruction, and feeds back an execution result to the client side after execution;
the server side inquires the current state of the target table and feeds back the inquiry result to the client side according to the target table name and the operation user in the table state inquiry instruction;
the table state change instruction comprises a table disable change instruction and a table enable change instruction, the table disable change instruction is a disable command, and the table enable change instruction is an enable command;
the method for the server side to judge whether to execute state change on the target table according to the target table name, the operation user and the state to be changed of the target table in the table state change instruction and feed back the execution result to the client side after execution comprises the following steps:
the method comprises the steps that a server side is based on a target table name, an operating user and a state to be changed of a target table in a disable command, when the target table exists, the current operating user has an operating authority and the current state of the target table is an enabled state, the state of the target table is modified into a disabled state by modifying attribute parameters of the target table, wherein the attribute parameters comprise the current table state, the modification time of the current table state and the retention time when the current table state is disabled;
the service end bases on the target table name, the operation user and the state to be changed of the target table in the enable command, and when the target table exists, the current operation user has the operation authority and the current state of the target table is the forbidden state, the state of the target table is changed into the enabling state by modifying the attribute parameters of the target table;
when the condition that the target table does not exist or the current operation user does not have the operation authority or the target state of the target table is consistent with the current state is inquired, refusing to change the state of the target table;
and the server feeds back the execution result of the target table to the client.
2. The method according to claim 1, wherein the method for the server to query the current state of the target table and feed back the query result to the client according to the target table name and the operation user in the table state query instruction comprises:
the current state of the target table comprises a disabled state and an enabled state;
and the server side returns a query result to the client side according to the target table name and the operation user in the table state query instruction when the current state of the target table is the enabled state, and feeds back the disabled state and the prompt which cannot be queried to the client side when the current state of the target table is the disabled state.
3. The method of claim 2, wherein feeding back the disabled state and the non-queryable prompt to the client further comprises:
the forbidden state of the target table is divided into an overdue forbidden state and a non-overdue forbidden state;
when the target table is in the state of being forbidden to exceed the period, a prompt that the target table can be deleted is sent to the client through the server, and when the target table is in the state of not being forbidden to exceed the period, a prompt that the target table cannot be operated is sent to the client through the server.
4. The method of claim 3, wherein the method for determining whether the target table is in the overdue disabled state or the non-overdue disabled state comprises:
identifying the attribute parameters of the target table, judging that the target table is in a state of being forbidden for expiration when the modification time of the current time and the current table state exceeds a preset interval time threshold, and judging that the target table is in a state of not being forbidden for expiration when the modification time of the current time and the current table state does not exceed the preset interval time threshold.
5. The method according to any one of claims 1-4, wherein the server side modifies the number of copies of the target table while changing the state of the target table.
6. The method according to any of claims 1-4, wherein the server is a HiveThriftServer.
7. An apparatus for implementing the method for changing the state of the Hive table in claim 1, comprising:
the server comprises a sending unit, a receiving unit and a processing unit, wherein the sending unit is used for receiving Hive table operation instructions sent by a client by a server, and the Hive table operation instructions comprise table state changing instructions and/or table state query instructions;
the change unit is used for judging whether to execute state change on the target table or not by the server according to the target table name, the operation user and the state to be changed of the target table in the table state change instruction, and feeding back an execution result to the client after execution;
and the query unit is used for the server side to query the current state of the target table and feed back a query result to the client side according to the target table name, the operation user and the state query of the target table in the table state query instruction.
8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of the claims 1 to 6.
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| CN202010975656.0A CN112256694B (en) | 2020-09-16 | 2020-09-16 | Hive table state changing method and device |
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| US7890925B1 (en) * | 2007-04-05 | 2011-02-15 | Nvidia Corporation | Automatic generation of custom driver packages |
| CN106713608A (en) * | 2016-07-26 | 2017-05-24 | 腾讯科技（深圳）有限公司 | Application function state modifying method and apparatus, and terminal |
| CN107249021A (en) * | 2017-05-27 | 2017-10-13 | 广东欧珀移动通信有限公司 | Method of data synchronization, device, storage medium, computer equipment and server |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7890925B1 (en) * | 2007-04-05 | 2011-02-15 | Nvidia Corporation | Automatic generation of custom driver packages |
| CN106713608A (en) * | 2016-07-26 | 2017-05-24 | 腾讯科技（深圳）有限公司 | Application function state modifying method and apparatus, and terminal |
| CN107249021A (en) * | 2017-05-27 | 2017-10-13 | 广东欧珀移动通信有限公司 | Method of data synchronization, device, storage medium, computer equipment and server |
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