OpenEdge Data Management: DataServer for Microsoft SQL Server

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Chapter 6: Connecting the DataServer Binding with connection and startup parameters Binding settings determine how data is pulled from the data source by the DataServer. When binding is turned on, query results are copied directly into the DataServer’s memory, eliminating the need to do post-query calls to retrieve the data. When binding is not enabled, queries run independent of the data retrieval, and subsequent calls to the data source are required to retrieve the data. The default setting is to use binding for both NO-LOCK and EXCLUSIVE-LOCK queries. You can override the default using the -Dsrv BINDING,n connection parameter. The syntax is: Syntax -Dsrv BINDING,n; 226 OpenEdge Data Management: DataServer for Microsoft SQL Server
Connecting a schema holder Table 31 describes the BINDING options that you can specify with the -Dsrv parameter. Table 31: Connection BINDING options Query tuning with connection and startup parameters You can control aspects of DataServer query handling not only programmatically within ABL statements, but also through startup and connection parameter options as described in this section. Note: Startup and connection parameters override query-tuning defaults. However, options set in the QUERY–TUNING phrase take precedence over startup and connection parameters. For example, if you specify NO–DEBUG for a query within your application, specifying qt_debug,SQL at connection time overrides the default application behavior but does not override the NO–DEBUG option that you specified for the query. See the “Query tuning” section on page 169 for more information. You override query-tuning defaults with the DataServer (-Dsrv) connection parameter when you connect to a MS SQL Server database. The syntax is: Syntax BINDING value Description 0 Indicates that binding is not enabled at all. 1 Use binding for NO-LOCK queries only. 2 Use binding for EXCLUSIVE-LOCK queries only. 3 Use binding for both NO-LOCK and EXCLUSIVE-LOCK queries. This is the default value. CONNECT data-source-name -dt MSS -Dsrv query-tuning-option1,value1 -Dsrv query-tuning-option2,value2. An alternate syntax for the -Dsrv parameter is as follows: Syntax CONNECT data-source-name -dt MSS -Dsrv query-tuning-option1,value1,query-tuning-option2,value2. Table 32 describes the query-tuning options that you can specify with the -Dsrv parameter. OpenEdge Data Management: DataServer for Microsoft SQL Server 227
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® ® PROGRESS® OPENEDGE® OpenEdg
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Contents Preface . . . . . . . . .
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Contents Data output and retrieval
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Contents Migrating an OpenEdge data
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Tables Contents Table 1: DataServer
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Examples Contents Example 1: Passin
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Preface This Preface contains the f
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Chapter 5, “Configuring the DataS
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Before you begin Preface Before att
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In this example, STREAM stream, UNL
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After displaying a message, OpenEdg
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Preface Software Foundation (http:/
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Preface use, copy, modify, and dist
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Preface DISCLAIMS ALL WARRANTIES WI
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Preface INCLUDING ALL IMPLIED WARRA
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Preface WARRANTIES OF MERCHANTABILI
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Preface conditions for packages lik
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Introduction OpenEdge Data Manageme
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DataServer components DataServer co
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DataServer for MS SQL Server logic
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Figure 3 illustrates the schema-loa
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DataServer utilities DataServer uti
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DataServer configurations DataServe
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The remote DataServer configuration
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DataServer configurations Configuri
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Software requirements Software requ
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Guidelines for using the DataServer
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Initial Programming Considerations
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Database design issues Database des
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MS SQL Server DataServer data sourc
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Client code page Database design is
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Support for Unicode Database design
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Indexes and sorting Database design
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Database design issues source’s c
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Triggers Database design issues Tri
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Data types Data types MS SQL Server
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Table 9: MS SQL Server data type eq
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Processing activities that require
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Table 11: MS SQL Server 2008 dateti
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Performing data type conversions Da
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Enabling Datetime data types using
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2008, or if you use a native driver
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Default and Special Datetime Defaul
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ABL-to-MS SQL Server data type mapp
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Unknown value (?) Data types The Da
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Record creation Suppose that you ha
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Data source record locking Data sou
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Handling lock timeouts Data source
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Locking impact on queries Data sour
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Data source record locking When thi
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To avoid this type of problem, the
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Error handling If you use NO-ERROR
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Cursors Cursors A cursor is like a
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Cursors your specifications. Adjust
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• Block cursors are directly link
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FIND customer WHERE ROWID(customer)
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For example, the following statemen
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find.p /* This code accesses an Ope
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ABL issues Table 19 summarizes ABL
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RDBMS Stored Procedure Details Open
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RDBMS stored procedure basics RDBMS
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RDBMS stored procedure basics When
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Run Stored-Procedure details •
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Run Stored-Procedure details An exp
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Run Stored-Proc statement execution
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Run Stored-Procedure details Also n
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Loading results into a temp-table T
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Retrieving return codes Interfacing
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Interfacing with RDBMS stored proce
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Loading result sets into temp-table
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Employing additional enhancements I
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Handling errors Handling errors The
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ROWID Support This section presents
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ROWID Support The RUN STORED-PROC c
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ROWID Support If the table uses com
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Additional Features to Enhance Data
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Connection pooling Connection pooli
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DataServer connection management Co
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Firehose exclusions Connection pool
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Cursor downgrades Connection poolin
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Query tuning Query tuning How you s
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LOOKAHEAD NO-LOOKAHEAD SEPARATE-CON
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Query tuning Table 24: Query-tuning
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Page 177 and 178: Table 25 describes how these contro
Page 179 and 180: Modifying the run-time schema check
Page 181 and 182: Configuring the DataServer Configur
Page 183 and 184: DataServer components Table 26: Ins
Page 185 and 186: Configuring a local DataServer Conf
Page 187 and 188: Configuring a remote DataServer 4.
Page 189 and 190: 5162 Configuring a remote DataServe
Page 191 and 192: The ubroker.properties file Configu
Page 193 and 194: Configuring a remote DataServer Tab
Page 195 and 196: Configuring a remote DataServer The
Page 197 and 198: Creating a schema holder Creating a
Page 199 and 200: Creating a schema holder configurat
Page 201 and 202: Creating a schema holder 3. In the
Page 203 and 204: Creating a schema holder 10. Choose
Page 205 and 206: Typical configuration for a remote
Page 207 and 208: Typical configuration for a remote
Page 209 and 210: Connecting the DataServer You can s
Page 211 and 212: Starting a remote DataServer Starti
Page 213 and 214: Starting a remote DataServer If you
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Page 217 and 218: Connection guidelines Connection gu
Page 219 and 220: Connecting a schema holder at start
Page 221 and 222: Single-User Mode (-1) Read-Only (-R
Page 223 and 224: Using a remote DataServer configura
Page 225: Value pairs within the connect stri
Page 229 and 230: qt_separate_connection qt_no_separa
Page 231 and 232: Connecting a schema holder Table 33
Page 233 and 234: Connecting a schema holder 1. Each
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Page 237 and 238: Logging levels You can choose one o
Page 239 and 240: Enabling ABL to SQL Correlation in
Page 241 and 242: Connecting a schema holder Example
Page 243 and 244: Connection failures and OpenEdge re
Page 245 and 246: Connection failures and OpenEdge re
Page 247 and 248: Using the $UNIQUE_DSLOG environment
Page 249 and 250: The DataServer Tutorial OpenEdge Da
Page 251 and 252: Demonstration databases for DataSer
Page 253 and 254: Preparing to create demonstration d
Page 259 and 260: DataServer utilities When you acces
Page 261 and 262: Prime to ROWID identification ROWID
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Page 267 and 268: Creating a schema holder You can se
Page 269 and 270: Updating a schema holder Updating a
Page 271 and 272: Verifying a schema holder Verifying
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Page 275 and 276: Changing connection information in
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Deleting a schema holder Deleting a
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Managing server attributes See the
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Managing server attributes Defining
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Managing server attributes If the p
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Managing server attributes 6. The P
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Defining a default constraint defin
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Managing server attributes 5. Click
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Managing server attributes • Resu
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Migrating an OpenEdge database to M
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Delta df to MS SQL Server Increment
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Modifying field-level information Y
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Defining the ROWID Modifying a sche
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Adding extended ABL support Adding
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Adding extended ABL support 4. Chan
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Adding extended ABL support 3. Drop
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Troubleshooting This chapter descri
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ODBC options ODBC options The DataS
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ODBC options Table 56: DataServer o
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Using MS SQL Server and DataServer
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Large rows—the PRGRS_MINBUF optio
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ODBC options Wait time for asynchro
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Using the block cursor switches ODB
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Migration Issues This appendix disc
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Modifying your application Note the
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Sample code for the db.owner.Custom
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Server Related Command Line Utiliti
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OpenEdge Management or OpenEdge Exp
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Syntax Parameters service-name PROB
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Other command line utilities for th
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Data Type Details C This appendix s
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nvarchar 8 SQL_NVARCHAR CHARACTER t
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Using qt_debug to Analyze Performan
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Using qt_debug to analyze performan
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Index Numbers 4GLTrans log entry ty
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display format 309 overflow checkin
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INPUT-OUTPUT option retrieving para
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DataServer (-Dsrv) startup paramete
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221, 242, 359 Schema defined 40 loa
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OpenEdge Data Management: DataServer for Microsoft SQL Server

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