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/*
* Microsoft JDBC Driver for SQL Server Copyright(c) Microsoft Corporation All rights reserved. This program is made
* available under the terms of the MIT License. See the LICENSE file in the project root for more information.
*/
package com.microsoft.sqlserver.jdbc;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.Statement;
import java.util.UUID;
/**
* Provides an interface to the {@link SQLServerConnection} and {@link SQLServerConnectionPoolProxy} classes.
*/
public interface ISQLServerConnection extends java.sql.Connection {
// Transaction types.
// TRANSACTION_SNAPSHOT corresponds to -> SET TRANSACTION ISOLATION LEVEL SNAPSHOT
int TRANSACTION_SNAPSHOT = 0x1000;
/**
* Returns the connection ID of the most recent connection attempt, regardless of whether the attempt succeeded or
* failed.
*
* @return 16-byte GUID representing the connection ID of the most recent connection attempt. Or, NULL if there is a
* failure after the connection request is initiated and the pre-login handshake.
* @throws SQLServerException
* If any errors occur.
*/
UUID getClientConnectionId() throws SQLServerException;
/**
* Creates a Statement object that will generate ResultSet objects with the given type,
* concurrency, and holdability. This method is the same as the createStatement method above, but it
* allows the default result set type, concurrency, and holdability to be overridden.
*
* @param nType
* one of the following ResultSet constants: ResultSet.TYPE_FORWARD_ONLY,
* ResultSet.TYPE_SCROLL_INSENSITIVE, or ResultSet.TYPE_SCROLL_SENSITIVE
* @param nConcur
* one of the following ResultSet constants: ResultSet.CONCUR_READ_ONLY or
* ResultSet.CONCUR_UPDATABLE
* @param nHold
* one of the following ResultSet constants: ResultSet.HOLD_CURSORS_OVER_COMMIT or
* ResultSet.CLOSE_CURSORS_AT_COMMIT
* @param stmtColEncSetting
* Specifies how data will be sent and received when reading and writing encrypted columns.
* @return a new Statement object that will generate ResultSet objects with the given
* type, concurrency, and holdability
* @throws SQLServerException
* if a database access error occurs, this method is called on a closed connection or the given parameters
* are not ResultSet constants indicating type, concurrency, and holdability
*/
Statement createStatement(int nType, int nConcur, int nHold,
SQLServerStatementColumnEncryptionSetting stmtColEncSetting) throws SQLServerException;
/**
* Creates a default PreparedStatement object that has the capability to retrieve auto-generated keys.
* The given constant tells the driver whether it should make auto-generated keys available for retrieval. This
* parameter is ignored if the SQL statement is not an INSERT statement, or an SQL statement able to
* return auto-generated keys (the list of such statements is vendor-specific).
*
* Note: This method is optimized for handling parametric SQL statements that benefit from precompilation. If
* the driver supports precompilation, the method prepareStatement will send the statement to the
* database for precompilation. Some drivers may not support precompilation. In this case, the statement may not be
* sent to the database until the PreparedStatement object is executed. This has no direct effect on
* users; however, it does affect which methods throw certain SQLExceptions.
*
* Result sets created using the returned PreparedStatement object will by default be type
* TYPE_FORWARD_ONLY and have a concurrency level of CONCUR_READ_ONLY. The holdability of
* the created result sets can be determined by calling {@link #getHoldability}.
*
* @param sql
* an SQL statement that may contain one or more '?' IN parameter placeholders
* @param flag
* a flag indicating whether auto-generated keys should be returned; one of
* Statement.RETURN_GENERATED_KEYS or Statement.NO_GENERATED_KEYS
* @param stmtColEncSetting
* Specifies how data will be sent and received when reading and writing encrypted columns.
* @return a new PreparedStatement object, containing the pre-compiled SQL statement, that will have
* the capability of returning auto-generated keys
* @throws SQLServerException
* if a database access error occurs, this method is called on a closed connection or the given parameter is
* not a Statement constant indicating whether auto-generated keys should be returned
*/
PreparedStatement prepareStatement(String sql, int flag,
SQLServerStatementColumnEncryptionSetting stmtColEncSetting) throws SQLServerException;
/**
* Creates a default PreparedStatement object capable of returning the auto-generated keys designated
* by the given array. This array contains the indexes of the columns in the target table that contain the
* auto-generated keys that should be made available. The driver will ignore the array if the SQL statement is not
* an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such
* statements is vendor-specific).
*
* An SQL statement with or without IN parameters can be pre-compiled and stored in a PreparedStatement
* object. This object can then be used to efficiently execute this statement multiple times.
*
* Note: This method is optimized for handling parametric SQL statements that benefit from precompilation. If
* the driver supports precompilation, the method prepareStatement will send the statement to the
* database for precompilation. Some drivers may not support precompilation. In this case, the statement may not be
* sent to the database until the PreparedStatement object is executed. This has no direct effect on
* users; however, it does affect which methods throw certain SQLExceptions.
*
* Result sets created using the returned PreparedStatement object will by default be type
* TYPE_FORWARD_ONLY and have a concurrency level of CONCUR_READ_ONLY. The holdability of
* the created result sets can be determined by calling {@link #getHoldability}.
*
* @param sql
* an SQL statement that may contain one or more '?' IN parameter placeholders
* @param columnIndexes
* an array of column indexes indicating the columns that should be returned from the inserted row or rows
* @param stmtColEncSetting
* Specifies how data will be sent and received when reading and writing encrypted columns.
* @return a new PreparedStatement object, containing the pre-compiled statement, that is capable of
* returning the auto-generated keys designated by the given array of column indexes
* @throws SQLServerException
* if a database access error occurs or this method is called on a closed connection
*/
PreparedStatement prepareStatement(String sql, int[] columnIndexes,
SQLServerStatementColumnEncryptionSetting stmtColEncSetting) throws SQLServerException;
/**
* Creates a default PreparedStatement object capable of returning the auto-generated keys designated
* by the given array. This array contains the names of the columns in the target table that contain the
* auto-generated keys that should be returned. The driver will ignore the array if the SQL statement is not an
* INSERT statement, or an SQL statement able to return auto-generated keys (the list of such
* statements is vendor-specific).
*
* An SQL statement with or without IN parameters can be pre-compiled and stored in a PreparedStatement
* object. This object can then be used to efficiently execute this statement multiple times.
*
* Note: This method is optimized for handling parametric SQL statements that benefit from precompilation. If
* the driver supports precompilation, the method prepareStatement will send the statement to the
* database for precompilation. Some drivers may not support precompilation. In this case, the statement may not be
* sent to the database until the PreparedStatement object is executed. This has no direct effect on
* users; however, it does affect which methods throw certain SQLExceptions.
*
* Result sets created using the returned PreparedStatement object will by default be type
* TYPE_FORWARD_ONLY and have a concurrency level of CONCUR_READ_ONLY. The holdability of
* the created result sets can be determined by calling {@link #getHoldability}.
*
* @param sql
* an SQL statement that may contain one or more '?' IN parameter placeholders
* @param columnNames
* an array of column names indicating the columns that should be returned from the inserted row or rows
* @param stmtColEncSetting
* Specifies how data will be sent and received when reading and writing encrypted columns.
* @return a new PreparedStatement object, containing the pre-compiled statement, that is capable of
* returning the auto-generated keys designated by the given array of column names
* @throws SQLServerException
* if a database access error occurs or this method is called on a closed connection
*/
PreparedStatement prepareStatement(String sql, String[] columnNames,
SQLServerStatementColumnEncryptionSetting stmtColEncSetting) throws SQLServerException;
/**
* Creates a PreparedStatement object that will generate ResultSet objects with the given
* type, concurrency, and holdability.
*
* This method is the same as the prepareStatement method above, but it allows the default result set
* type, concurrency, and holdability to be overridden.
*
* @param sql
* a String object that is the SQL statement to be sent to the database; may contain one or more
* '?' IN parameters
* @param nType
* one of the following ResultSet constants: ResultSet.TYPE_FORWARD_ONLY,
* ResultSet.TYPE_SCROLL_INSENSITIVE, or ResultSet.TYPE_SCROLL_SENSITIVE
* @param nConcur
* one of the following ResultSet constants: ResultSet.CONCUR_READ_ONLY or
* ResultSet.CONCUR_UPDATABLE
* @param resultSetHoldability
* one of the following ResultSet constants: ResultSet.HOLD_CURSORS_OVER_COMMIT or
* ResultSet.CLOSE_CURSORS_AT_COMMIT
* @param stmtColEncSetting
* Specifies how data will be sent and received when reading and writing encrypted columns.
* @return a new PreparedStatement object, containing the pre-compiled SQL statement, that will
* generate ResultSet objects with the given type, concurrency, and holdability
* @throws SQLServerException
* if a database access error occurs, this method is called on a closed connection or the given parameters
* are not ResultSet constants indicating type, concurrency, and holdability
*/
PreparedStatement prepareStatement(java.lang.String sql, int nType, int nConcur, int resultSetHoldability,
SQLServerStatementColumnEncryptionSetting stmtColEncSetting) throws SQLServerException;
/**
* Creates a CallableStatement object that will generate ResultSet objects with the given
* type and concurrency. This method is the same as the prepareCall method above, but it allows the
* default result set type, result set concurrency type and holdability to be overridden.
*
* @param sql
* a String object that is the SQL statement to be sent to the database; may contain on or more
* '?' parameters
* @param nType
* one of the following ResultSet constants: ResultSet.TYPE_FORWARD_ONLY,
* ResultSet.TYPE_SCROLL_INSENSITIVE, or ResultSet.TYPE_SCROLL_SENSITIVE
* @param nConcur
* one of the following ResultSet constants: ResultSet.CONCUR_READ_ONLY or
* ResultSet.CONCUR_UPDATABLE
* @param nHold
* one of the following ResultSet constants: ResultSet.HOLD_CURSORS_OVER_COMMIT or
* ResultSet.CLOSE_CURSORS_AT_COMMIT
* @param stmtColEncSetting
* Specifies how data will be sent and received when reading and writing encrypted columns.
* @return a new CallableStatement object, containing the pre-compiled SQL statement, that will
* generate ResultSet objects with the given type, concurrency, and holdability
* @throws SQLServerException
* if a database access error occurs, this method is called on a closed connection or the given parameters
* are not ResultSet constants indicating type, concurrency, and holdability
*/
CallableStatement prepareCall(String sql, int nType, int nConcur, int nHold,
SQLServerStatementColumnEncryptionSetting stmtColEncSetting) throws SQLServerException;
/**
* Sets the value of the sendTimeAsDatetime connection property. When true, java.sql.Time values will be sent to the
* server as SQL Serverdatetime values. When false, java.sql.Time values will be sent to the server as SQL
* Servertime values. sendTimeAsDatetime can also be modified programmatically with
* SQLServerDataSource.setSendTimeAsDatetime. The default value for this property may change in a future release.
*
* @param sendTimeAsDateTimeValue
* enables/disables setting the sendTimeAsDatetime connection property. For more information about how the
* Microsoft JDBC Driver for SQL Server configures java.sql.Time values before sending them to the server,
* see Configuring How
* java.sql.Time Values are Sent to the Server.
*
* @throws SQLServerException
* if a database access error occurs
*/
void setSendTimeAsDatetime(boolean sendTimeAsDateTimeValue) throws SQLServerException;
/**
* Returns the value of the sendTimeAsDatetime property.
*
* @return boolean value of sendTimeAsDatetime
*
* @throws SQLServerException
* if a database access error occurs
*/
boolean getSendTimeAsDatetime() throws SQLServerException;
/**
* Returns the number of currently outstanding prepared statement un-prepare actions.
*
* @return Returns the current value per the description.
*/
int getDiscardedServerPreparedStatementCount();
/**
* Forces the un-prepare requests for any outstanding discarded prepared statements to be executed.
*/
void closeUnreferencedPreparedStatementHandles();
/**
* Returns the behavior for a specific connection instance. If false the first execution will call sp_executesql and
* not prepare a statement, once the second execution happens it will call sp_prepexec and actually setup a prepared
* statement handle. Following executions will call sp_execute. This relieves the need for sp_unprepare on prepared
* statement close if the statement is only executed once. The default for this option can be changed by calling
* setDefaultEnablePrepareOnFirstPreparedStatementCall().
*
* @return Returns the current setting per the description.
*/
boolean getEnablePrepareOnFirstPreparedStatementCall();
/**
* Sets the behavior for a specific connection instance. If value is false the first execution will call
* sp_executesql and not prepare a statement, once the second execution happens it will call sp_prepexec and
* actually setup a prepared statement handle. Following executions will call sp_execute. This relieves the need for
* sp_unprepare on prepared statement close if the statement is only executed once.
*
* @param value
* Changes the setting per the description.
*/
void setEnablePrepareOnFirstPreparedStatementCall(boolean value);
/**
* Returns the behavior for a specific connection instance. This setting controls how many outstanding prepared
* statement discard actions (sp_unprepare) can be outstanding per connection before a call to clean-up the
* outstanding handles on the server is executed. If the setting is {@literal <=} 1, unprepare actions will be
* executed immedietely on prepared statement close. If it is set to {@literal >} 1, these calls will be batched
* together to avoid overhead of calling sp_unprepare too often. The default for this option can be changed by
* calling getDefaultServerPreparedStatementDiscardThreshold().
*
* @return Returns the current setting per the description.
*/
int getServerPreparedStatementDiscardThreshold();
/**
* Sets the behavior for a specific connection instance. This setting controls how many outstanding prepared
* statement discard actions (sp_unprepare) can be outstanding per connection before a call to clean-up the
* outstanding handles on the server is executed. If the setting is {@literal <=} 1 unprepare actions will be
* executed immedietely on prepared statement close. If it is set to {@literal >} 1 these calls will be batched
* together to avoid overhead of calling sp_unprepare too often.
*
* @param value
* Changes the setting per the description.
*/
void setServerPreparedStatementDiscardThreshold(int value);
/**
* Sets the size of the prepared statement cache for this connection. A value less than 1 means no cache.
*
* @param value
* The new cache size.
*
*/
void setStatementPoolingCacheSize(int value);
/**
* Returns the size of the prepared statement cache for this connection. A value less than 1 means no cache.
*
* @return Returns the current setting per the description.
*/
int getStatementPoolingCacheSize();
/**
* Returns whether statement pooling is enabled or not for this connection.
*
* @return Returns the current setting per the description.
*/
boolean isStatementPoolingEnabled();
/**
* Returns the current number of pooled prepared statement handles.
*
* @return Returns the current setting per the description.
*/
int getStatementHandleCacheEntryCount();
/**
* Sets the value to Disable/enable statement pooling.
*
* @param value
* true to disable statement pooling, false to enable it.
*/
void setDisableStatementPooling(boolean value);
/**
* Returns the value whether statement pooling is disabled.
*
* @return true if statement pooling is disabled, false if it is enabled.
*/
boolean getDisableStatementPooling();
/**
* Returns the current flag value for useFmtOnly.
*
* @return 'useFmtOnly' property value.
*/
boolean getUseFmtOnly();
/**
* Specifies the flag to use FMTONLY for parameter metadata queries.
*
* @param useFmtOnly
* boolean value for 'useFmtOnly'.
*/
void setUseFmtOnly(boolean useFmtOnly);
}