C API Developer's Guide

904 Pages·2016·5.38 MB·English

c-treeDB
C API Developer's Guide
c-treeDB
C API Developer's Guide
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Contents
1. Introduction ......................................................................................................... 1
1.1 Layout of this Manual ............................................................................................ 2
2. Quick Tour ........................................................................................................... 3
2.1 Introductory Tutorial .............................................................................................. 4
Init 5
Define .................................................................................................................................. 6
Manage ............................................................................................................................... 8
Done .................................................................................................................................. 12
Additional Resources ........................................................................................................ 13
2.2 Relationships ....................................................................................................... 14
Init 16
Define ................................................................................................................................ 17
Manage ............................................................................................................................. 23
Done .................................................................................................................................. 31
Additional Resources ........................................................................................................ 32
2.3 Record/Row Locking ........................................................................................... 33
Init 35
Define ................................................................................................................................ 36
Manage ............................................................................................................................. 39
Done .................................................................................................................................. 44
Additional Resources ........................................................................................................ 45
2.4 Transaction Processing ....................................................................................... 46
Init 47
Define ................................................................................................................................ 48
Manage ............................................................................................................................. 54
Done .................................................................................................................................. 62
Additional Resources ........................................................................................................ 63
3. Programmer's Reference .................................................................................. 64
3.1 Working with Sessions ........................................................................................ 66
Allocating a Session Handle ............................................................................................. 66
Creating a new session dictionary .................................................................................... 67
Session logon and logout .................................................................................................. 68
Session properties ............................................................................................................ 69
Managing Databases ........................................................................................................ 70
Session wide functions ..................................................................................................... 74
Working with Sessions without Dictionary Support ........................................................... 77
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Introduction

Attach and Detach Existing Sessions ............................................................................... 78
Session Dictionary ............................................................................................................ 79
3.2 Working with Databases ...................................................................................... 80
Allocating a Database handle ........................................................................................... 80
Connecting to a database ................................................................................................. 80
Database properties .......................................................................................................... 81
Managing Tables ............................................................................................................... 82
Database Dictionary .......................................................................................................... 87
3.3 Working with Tables ............................................................................................ 89
Allocating a table handle ................................................................................................... 90
Creating a new table ......................................................................................................... 91
Opening a table ............................................................................................................... 102
Altering a table ................................................................................................................ 104
Attach and Detach Open Tables ..................................................................................... 110
Table Properties .............................................................................................................. 111
3.4 Working with Records ....................................................................................... 115
Allocating a record handle .............................................................................................. 115
User managed record buffers ......................................................................................... 116
The default index ............................................................................................................. 117
Navigating records .......................................................................................................... 118
Finding records ............................................................................................................... 120
Record Sets .................................................................................................................... 121
Record Filters .................................................................................................................. 122
Record Batches ............................................................................................................... 139
Reading and writing field data to a record buffer ............................................................ 148
Operators ........................................................................................................................ 153
Clearing the record buffer ............................................................................................... 154
Adding new records ........................................................................................................ 154
Updating existing records ............................................................................................... 155
Deleting records .............................................................................................................. 156
Record properties ............................................................................................................ 156
Record Locking ............................................................................................................... 157
3.5 Data Types ........................................................................................................ 159
Scalar Types ................................................................................................................... 159
Date Types ...................................................................................................................... 159
Time Types ..................................................................................................................... 161
Date/Time (Timestamp) Types ....................................................................................... 162
Numeric Types ................................................................................................................ 162
3.6 Data Integrity ..................................................................................................... 168
Locking ............................................................................................................................ 168
Transactions .................................................................................................................... 171
3.7 Working with Resources .................................................................................... 174
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Introduction

Types of Resources ........................................................................................................ 174
c-treeDB C API - Working with Resources ..................................................................... 175
3.8 Working with Callbacks ..................................................................................... 184
Callback Function Type .................................................................................................. 184
Callback Return Codes ................................................................................................... 185
Callback Handle Parameters .......................................................................................... 185
Callback Types ................................................................................................................ 186
Working with Callbacks ................................................................................................... 205
3.9 Working with Unicode ........................................................................................ 207
Unicode UTF-16 .............................................................................................................. 207
Unicode UTF-8 ................................................................................................................ 207
c-treeDB C API UTF-8 Compliance ................................................................................ 208
Activating c-treeDB Unicode support .............................................................................. 209
ICU - International Components for Unicode .................................................................. 209
Unicode Support ............................................................................................................. 209
Extended Key Segment Definition .................................................................................. 217
3.10 Working with Multi-Record Virtual Tables .......................................................... 221
c-treeDB Virtual Tables ................................................................................................... 222
c-treeACE MRTTable API ............................................................................................... 224
Multi-Record Table Tutorial ............................................................................................. 238
3.11 Working with Multiple Files (FILESET) .............................................................. 255
Dynamic partition member support ................................................................................. 255
3.12 Compatibility with other c-tree API Technologies .............................................. 259
Compatibility with c-treeACE ISAM and Low-level Data Files ........................................ 259
Compatibility with c-treeACE SQL .................................................................................. 259
3.13 c-treeDB, ISAM, and Low-Level Integration ...................................................... 261
Overview ......................................................................................................................... 261
Switching c-tree instances .............................................................................................. 261
Switching ISAM contexts ................................................................................................ 262
Obtaining table data and file number .............................................................................. 263
Obtaining data file number .............................................................................................. 263
Obtaining index file number ............................................................................................ 264
4. c-treeDB C API Function Reference .............................................................. 265
4.1 c-treeDB Definitions .......................................................................................... 266
Field Types ...................................................................................................................... 266
Find Modes ..................................................................................................................... 268
Index Key Types ............................................................................................................. 269
Record Lock Modes ........................................................................................................ 269
Session Wide Lock Modes .............................................................................................. 269
Segment Modes .............................................................................................................. 270
Table Create Modes........................................................................................................ 272
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Introduction

Table Open Modes .......................................................................................................... 273
Table Permissions ........................................................................................................... 274
4.2 c-treeDB C API Summary ................................................................................. 276
Initialization ..................................................................................................................... 276
Transaction Processing .................................................................................................. 276
Data Definition ................................................................................................................. 276
Data Manipulation ........................................................................................................... 277
Data Types ...................................................................................................................... 277
Data Structures ............................................................................................................... 278
Utility ............................................................................................................................... 281
4.3 Function Descriptions ........................................................................................ 281
A. c-treeACE Error Code Reference ................................................................... 852
B. c-treeDB Error and Return Values ................................................................. 885
5. Index ................................................................................................................. 890

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conventions used in the documentation.
The following formatted items identify special information.

Formatting convention Type of Information
Bold Used to emphasize a point or for variable expressions such
as parameters
CAPITALS Names of keys on the keyboard. For example, SHIFT,
CTRL, or ALT+F4
FairCom Terminology FairCom technology term
FunctionName() c-treeACE Function name
Parameter c-treeACE Function Parameter
Code Example Code example or Command line usage
utility c-treeACE executable or utility
filename c-treeACE file or path name
CONFIGURATION KEYWORD c-treeACE Configuration Keyword
CTREE_ERR c-treeACE Error Code
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