Package | Description |
---|---|
org.postgresql.core.v3 |
Modifier and Type | Class and Description |
---|---|
class |
CopyDualImpl |
class |
CopyInImpl
Anticipated flow of a COPY FROM STDIN operation:
CopyManager.copyIn() ->QueryExecutor.startCopy() - sends given query to server
->processCopyResults(): - receives CopyInResponse from Server - creates new CopyInImpl
->initCopy(): - receives copy metadata from server ->CopyInImpl.init() ->lock()
connection for this operation - if query fails an exception is thrown - if query returns wrong
CopyOperation, copyIn() cancels it before throwing exception <-return: new CopyInImpl holding
lock on connection repeat CopyIn.writeToCopy() for all data ->CopyInImpl.writeToCopy()
->QueryExecutorImpl.writeToCopy() - sends given data ->processCopyResults() - parameterized
not to block, just peek for new messages from server - on ErrorResponse, waits until protocol is
restored and unlocks connection CopyIn.endCopy() ->CopyInImpl.endCopy()
->QueryExecutorImpl.endCopy() - sends CopyDone - processCopyResults() - on CommandComplete
->CopyOperationImpl.handleCommandComplete() - sets updatedRowCount when applicable - on
ReadyForQuery unlock() connection for use by other operations <-return:
CopyInImpl.getUpdatedRowCount()
|
class |
CopyOutImpl
Anticipated flow of a COPY TO STDOUT operation:
CopyManager.copyOut() ->QueryExecutor.startCopy() - sends given query to server
->processCopyResults(): - receives CopyOutResponse from Server - creates new CopyOutImpl
->initCopy(): - receives copy metadata from server ->CopyOutImpl.init() ->lock()
connection for this operation - if query fails an exception is thrown - if query returns wrong
CopyOperation, copyOut() cancels it before throwing exception <-returned: new CopyOutImpl
holding lock on connection repeat CopyOut.readFromCopy() until null
->CopyOutImpl.readFromCopy() ->QueryExecutorImpl.readFromCopy() ->processCopyResults() -
on copydata row from server ->CopyOutImpl.handleCopydata() stores reference to byte array - on
CopyDone, CommandComplete, ReadyForQuery ->unlock() connection for use by other operations
<-returned: byte array of data received from server or null at end.
|
Modifier and Type | Method and Description |
---|---|
void |
QueryExecutorImpl.cancelCopy(CopyOperationImpl op)
Finishes a copy operation and unlocks connection discarding any exchanged data.
|
long |
QueryExecutorImpl.endCopy(CopyOperationImpl op)
Finishes writing to copy and unlocks connection
|
void |
QueryExecutorImpl.flushCopy(CopyOperationImpl op) |
void |
QueryExecutorImpl.writeToCopy(CopyOperationImpl op,
byte[] data,
int off,
int siz)
Sends data during a live COPY IN operation.
|
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