Normally used to send data to the back-end. Spanner does not currently support this, so send will
throw a descriptive error to be sent to the user. Note that we do parse this in order for this to
be future proof, and to ensure the input stream is flushed of the command (in order to continue
receiving properly)
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[],[],null,["# Class CopyDataMessage (0.27.1)\n\nVersion latestkeyboard_arrow_down\n\n- [0.27.1 (latest)](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.27.0](/java/docs/reference/pgadapter/0.27.0/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.26.0](/java/docs/reference/pgadapter/0.26.0/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.25.0](/java/docs/reference/pgadapter/0.25.0/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.24.0](/java/docs/reference/pgadapter/0.24.0/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.23.1](/java/docs/reference/pgadapter/0.23.1/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.22.1](/java/docs/reference/pgadapter/0.22.1/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.21.0](/java/docs/reference/pgadapter/0.21.0/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.20.0](/java/docs/reference/pgadapter/0.20.0/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.19.1](/java/docs/reference/pgadapter/0.19.1/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.18.4](/java/docs/reference/pgadapter/0.18.4/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.17.0](/java/docs/reference/pgadapter/0.17.0/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.16.0](/java/docs/reference/pgadapter/0.16.0/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.15.0](/java/docs/reference/pgadapter/0.15.0/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.14.1](/java/docs/reference/pgadapter/0.14.1/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.9.0](/java/docs/reference/pgadapter/0.9.0/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.8.0](/java/docs/reference/pgadapter/0.8.0/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.7.0](/java/docs/reference/pgadapter/0.7.0/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.6.1](/java/docs/reference/pgadapter/0.6.1/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage)\n- [0.5.1](/java/docs/reference/pgadapter/0.5.1/com.google.cloud.spanner.pgadapter.wireprotocol.CopyDataMessage) \n\n public class CopyDataMessage extends ControlMessage\n\nNormally used to send data to the back-end. Spanner does not currently support this, so send will\nthrow a descriptive error to be sent to the user. Note that we do parse this in order for this to\nbe future proof, and to ensure the input stream is flushed of the command (in order to continue\nreceiving properly) \n\nInheritance\n-----------\n\n[java.lang.Object](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html) \\\u003e [WireMessage](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage) \\\u003e [ControlMessage](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.ControlMessage) \\\u003e CopyDataMessage \n\nInherited Members\n-----------------\n\n[ControlMessage.create(ConnectionHandler)](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.ControlMessage#com_google_cloud_spanner_pgadapter_wireprotocol_ControlMessage_create_com_google_cloud_spanner_pgadapter_ConnectionHandler_) \n[ControlMessage.getFormatCodes(DataInputStream)](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.ControlMessage#com_google_cloud_spanner_pgadapter_wireprotocol_ControlMessage_getFormatCodes_java_io_DataInputStream_) \n[ControlMessage.handleError(Exception)](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.ControlMessage#com_google_cloud_spanner_pgadapter_wireprotocol_ControlMessage_handleError_java_lang_Exception_) \n[ControlMessage.isExtendedProtocol()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.ControlMessage#com_google_cloud_spanner_pgadapter_wireprotocol_ControlMessage_isExtendedProtocol__) \n[WireMessage.getHeaderLength()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_getHeaderLength__) \n[WireMessage.getIdentifier()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_getIdentifier__) \n[WireMessage.getMessageName()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_getMessageName__) \n[WireMessage.getParameters(DataInputStream)](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_getParameters_java_io_DataInputStream_) \n[WireMessage.getPayloadString()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_getPayloadString__) \n[WireMessage.nextHandler()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_nextHandler__) \n[WireMessage.read(int)](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_read_int_) \n[WireMessage.readAll()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_readAll__) \n[WireMessage.readString()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_readString__) \n[WireMessage.send()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_send__) \n[WireMessage.sendPayload()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_sendPayload__) \n[WireMessage.toString()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_toString__) \n[Object.clone()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#clone--) \n[Object.equals(Object)](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#equals-java.lang.Object-) \n[Object.finalize()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#finalize--) \n[Object.getClass()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#getClass--) \n[Object.hashCode()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#hashCode--) \n[Object.notify()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notify--) \n[Object.notifyAll()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notifyAll--) \n[Object.wait()](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--) \n[Object.wait(long)](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-) \n[Object.wait(long,int)](https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-int-)\n\nStatic Fields\n-------------\n\n### IDENTIFIER\n\n protected static final char IDENTIFIER\n\nConstructors\n------------\n\n### CopyDataMessage(ConnectionHandler connection)\n\n public CopyDataMessage(ConnectionHandler connection)\n\nMethods\n-------\n\n### getIdentifier()\n\n public String getIdentifier()\n\nUsed for logging.\n\n**Overrides** \n[WireMessage.getIdentifier()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_getIdentifier__)\n\n### getMessageName()\n\n protected String getMessageName()\n\nUsed for logging.\n\n**Overrides** \n[WireMessage.getMessageName()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_getMessageName__)\n\n### getPayload()\n\n public byte[] getPayload()\n\n### getPayloadString()\n\n protected String getPayloadString()\n\nUsed for logging.\n\n**Overrides** \n[WireMessage.getPayloadString()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_getPayloadString__)\n\n### sendPayload()\n\n protected void sendPayload()\n\nOverride this method to include post-processing and metadata in the sending process. Template\nmethod for send.\n**Overrides** \n[WireMessage.sendPayload()](/java/docs/reference/pgadapter/latest/com.google.cloud.spanner.pgadapter.wireprotocol.WireMessage#com_google_cloud_spanner_pgadapter_wireprotocol_WireMessage_sendPayload__)"]]
