Dear SQLite support,
Develop informations:
Windows 7 64bit
Visual StudioProfessional 2015 (Version 14.0.25431.01 Update 3);
.NET Build Platform 4.5.1
System.Data.SQLite.dll used from Installation
sqlite-netFx451-setup-bundle-x64-2013-1.0.112.0.exe
I am using followed Table:
CREATE TABLE XRelations ( XRID INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL ,
XID1 TEXT (100) NOT NULL ,
XID2 TEXT (100) NOT NULL ,
RelationType TEXT (100) NULL ,
CONSTRAINT unq UNIQUE ( XID1,
XID2)
)
In C# .NET Source Code after filling of Schema this table, I am missing the
Unique constraint. I have expected a list of the two constraints: of Primary
key and of Unique. But I can find only Primary Key Constraint.
Note: the Unique Constraint works on the Database fine, if I try to insert
redundant row, occurs Exception: UNIQUE constraint failed.
DataTable pDt = new DataTable(ptTabellenName);
string ltSQL = "select * from " + ptTabellenName + " where 1=0";
System.Data.SQLite.SQLiteDataAdapter lSQLiteDataAdapterSchema = new
System.Data.SQLite.SQLiteDataAdapter();
lSQLiteDataAdapterSchema.FillSchema(pDt, SchemaType.Mapped);
I have tried some other syntax, but withou effect:
CREATE TABLE XRelations ( XRID INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL ,
XID1 TEXT (100) NOT NULL ,
XID2 TEXT (100) NOT NULL ,
RelationType TEXT (100) NULL ,
UNIQUE ( XID1, XID2)
)
Or via two SQL commands:
CREATE TABLE XRelations ( XRID INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL ,
XID1 TEXT (100) NOT NULL ,
XID2 TEXT (100) NOT NULL ,
RelationType TEXT (100) NULL
);
CREATE UNIQUE INDEX unq ON XRelations (XID1, XID2);
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
If think the Problem is only by multiple column for Unique Key. If I reduce the
Unique constrain for single column, then it works:
CREATE TABLE XRelations ( XRID INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL ,
XID1 TEXT (100) NOT NULL ,
XID2 TEXT (100) NOT NULL ,
RelationType TEXT (100) NULL ,
CONSTRAINT unq UNIQUE (XID2)
)
I can find in DataTable.Constrints also Constraint for multiple Primary Key
column, but never Constraint for multiple Unique column.
Do you can help me or explain me why it doesn't work?
Regards,
Jaroslav Homisin
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