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With the following 2 tables and view in an SQLite database:
CREATE TABLE table01 (
id INTEGER NOT NULL PRIMARY KEY,
name TEXT NOT NULL,
code TEXT NULL,
ranking INTEGER NULL,
table02id INTEGER NULL REFERENCES table02(id)
);
CREATE TABLE table02 (
id INTEGER NOT NULL PRIMARY KEY,
name TEXT NOT NULL,
code TEXT NULL,
ranking INTEGER NULL
);
CREATE VIEW view01 AS
SELECT
t1.id
, t1.name
, COALESCE(t2.code, t1.code) AS code
, COALESCE(t2.ranking, t1.ranking) AS ranking
FROM table01 t1 LEFT OUTER JOIN table02 t2 ON t1.table02id = t2.id;
After populating table01 with records that all have null code/ranking values and then creating 1 or 2 records in table02 with values in all columns and linking them to a couple of records in table01 I then try to fetch the data using the view into the following class:
public class TestModel
{
public int Id { get; set; }
public string Name { get; set; }
public string Code { get; set; }
public int? Ranking { get; set; }
}
in batches using the query: "SELECT id, name, code, ranking FROM view01 ORDER BY id LIMIT @offset,@take"
The error "Error parsing column 3 (ranking=4 - Int64)" is thrown when a table02 ranking value is present. I tried replacing coalesce with a CASE statement, I have cast the COALESCE expression to an integer, i have replaced the column ranking with a cast to integer expression in the data select query, I also tried using the joined tables rather than the view - all give the same cast error.
The text was updated successfully, but these errors were encountered:
Sorry, submitted before I had finished - apologies:
I also tried a view using a coalesce statement with only one table and that worked fine:
CREATE VIEW view04 AS
SELECT
t1.id
, t1.name
, COALESCE(t1.code, 'T1') AS code
, COALESCE(t1.ranking, 4) AS ranking
FROM table01 as t1;
A small console app (.Net 4.7.2) demonstrates the issue, it creates the SQLite database, adds test data and retrieves the data showing the error thrown ViewMapTest.zip
One further observation, if the number of records fetched is set to 1 or 2 instead of 50, then no error is thrown, setting it to 3 or more always causes the error
With the following 2 tables and view in an SQLite database:
CREATE TABLE table01 (
id INTEGER NOT NULL PRIMARY KEY,
name TEXT NOT NULL,
code TEXT NULL,
ranking INTEGER NULL,
table02id INTEGER NULL REFERENCES table02(id)
);
CREATE TABLE table02 (
id INTEGER NOT NULL PRIMARY KEY,
name TEXT NOT NULL,
code TEXT NULL,
ranking INTEGER NULL
);
CREATE VIEW view01 AS
SELECT
t1.id
, t1.name
, COALESCE(t2.code, t1.code) AS code
, COALESCE(t2.ranking, t1.ranking) AS ranking
FROM table01 t1 LEFT OUTER JOIN table02 t2 ON t1.table02id = t2.id;
After populating table01 with records that all have null code/ranking values and then creating 1 or 2 records in table02 with values in all columns and linking them to a couple of records in table01 I then try to fetch the data using the view into the following class:
in batches using the query: "SELECT id, name, code, ranking FROM view01 ORDER BY id LIMIT @offset,@take"
The error "Error parsing column 3 (ranking=4 - Int64)" is thrown when a table02 ranking value is present. I tried replacing coalesce with a CASE statement, I have cast the COALESCE expression to an integer, i have replaced the column ranking with a cast to integer expression in the data select query, I also tried using the joined tables rather than the view - all give the same cast error.
The text was updated successfully, but these errors were encountered: