How can I check if the value of a field is numeric or not in a Firebird database? This seems like an easy problem but I can't find anything in the FreeUDFLib or standard Firebird library. Here's how I would do it in SQL Server.
Select field
from table
where isnumeric(field) = 1
Some research got me to "similar to". This should work, but throws an error:
select field
from table
where field SIMILAR TO '[0-9]+'
{"Dynamic SQL Error" & vbCrLf & "SQL error code = -104" & vbCrLf & "Token unknown - " & vbCrLf & "SIMILAR"}
Firebird has no built-in function that does what isnumeric from SQL Server does. In Firebird 3 you can build one yourself in PSQL, for example:
create function isnumeric(val varchar(30))
returns boolean
deterministic
as
declare dblval double precision;
begin
dblval = cast(val as double precision);
return true;
when any do
return false;
end
As to your problem with similar to, it was introduced in Firebird 2.5, so this would indicate you're using Firebird 2.1 or earlier. In that case, it is really time to update. Firebird 2.5 and older are End-of-Life and no longer receive updates (including security fixes!).
Related
First I set up the dream factory by "Bitnami Installer for Windows". Following to https://github.com/dreamfactorysoftware/dsp-core/wiki/Install-Microsoft-Windows
Then I follow this add-a-rest-api-to-any-sql-db-in-minutes to add Services to my Remote Postgres Database.
On the "API Docs" tab, it is success to call the GET /db operation. ( getTables() - List all table names).
I got the following error when trying to call GET /db/{table_name} operation ( getRecordsByFilter() - Retrieve one or more records by using a filter).
Please help
[app][ERROR ] CDbCommand::fetchAll() failed: SQLSTATE[42601]: Syntax error: 7 ERROR: syntax error at or near "field_name"
LINE 1: SELECT k.column_name field_name
^. The SQL statement executed was: SELECT k.column_name field_name
FROM "information_schema"."key_column_usage" k
LEFT JOIN "information_schema"."table_constraints" c
ON k.table_name = c.table_name
AND k.constraint_name = c.constraint_name
WHERE c.constraint_type ='PRIMARY KEY'
AND k.table_name = :table
AND k.table_schema = :schema.
Please check the version of PostgreSQL you are connecting to. It turns out that omission of as keyword is supported starting from 8.4.
Here's a quote from 8.4 release notes section E.23.3.3. Queries:
Allow AS to be optional when specifying a SELECT (or RETURNING) column
output label (Hiroshi Saito)
This works so long as the column label is not any PostgreSQL keyword;
otherwise AS is still needed.
Therefore SELECT k.column_name field_name is not valid for 8.3 and below, but SELECT k.column_name AS field_name would work.
If PostgreSQL version is the cause of your problem you have several options:
update the database to 8.4 and above;
patch the Dreamfactory codebase yourself to work around this problem;
raise a ticket in Dreamfactory's bug tracker and wait them to fix it for you.
I've got an issue while executing a SQL statement in SQL Server 2012 while it's perfectly working in a SQL Server 2008 R2...
The error message is :
Msg 8114, Level 16, State 5, Line 1
Error converting data type varchar
to numeric.
I want to execute this SQL Select statement :
Select
count(*)
from IMPORTBM
inner join ATTRIBUTE on ATT_ATTRIBUTE_ID = IMP_ATTRIBUTE_ID
where IMP_LOCATION_ID = 2
AND IMP_SERIAL_ID = 310001
AND IMP_VERSION_ID = 1
AND (
(ATT_ATTRIBUTE = 'PS_APISizing'
AND IMP_VALUE = 'C')
OR
(ATT_ATTRIBUTE = 'DTD'
AND ISNUMERIC(IMP_VALUE) = 1
AND CAST( IMP_VALUE as NUMERIC(38,19)) <= 0.469)
OR
(ATT_ATTRIBUTE = 'IOD'
AND ISNUMERIC(IMP_VALUE) = 1
AND CAST( IMP_VALUE as NUMERIC(38,19)) BETWEEN 3.684 AND 4.225)
)
Could you help me finding out why it's not working with SQL Server 2012 please ?
The problem is that conditions are not always evaluated in the order you place them. This means that Cast(IMP_VALUE as numeric(38, 19)) can fail when it is a non-numeric value, if the query execution plan happens to evaluate this before the IsNumeric(IMP_VALUE) = 1.
This is not determined by how many clauses there are or what version of SQL Server you're running--those are only coincidences. The problem is exactly as I described. The fact that you get different results with different queries is due to different queries, or different servers, using different execution plans.
The cure is to make sure that all conditions will not throw an error, no matter what order they are executed in.
For all versions of SQL Server, you can do this:
Convert(
numeric(38,19),
CASE WHEN IsNumeric(IMP_VALUE) = 1 THEN IMP_VALUE ELSE NULL END
) <= 0.469
Or, in SQL Server 2012 and up, you can use Try_Convert:
Try_Convert(numeric(38,19), IMP_VALUE) <= 0.469
If your server complains that this is not a built-in function name, then it is likely that your database was upgraded from a prior version and you need to alter the database compatibility level. Note that doing this could have some other effects in the system that you need to consider, so study up on it first, and try it out in a non-production system before doing it in production (or do it during a non-critical period and set the compatibility level back if you run into any issues). The danger is not that any damage will occur, but that query results could be different or errors could occur (different ordering of query or stored procedure results being a more common occurrence).
ALTER DATABASE database_name
SET COMPATIBILITY_LEVEL = 110; -- SQL Server 2012
What is the definition of the table? (IMP_VALUE at least). Why not store numeric in the 1st place...
2008 and 2012 query plan probably differ and does not handle the parameter and condition in the same order.
With SQL Server 2012 (compatibility level 110) you can try to replace the 2 cast:
AND ISNUMERIC(IMP_VALUE) = 1
AND CAST( IMP_VALUE as NUMERIC(38,19)) <= 0.469)
by
AND TRY_CONVERT(NUMERIC(38,19), IMP_VALUE) <= 0.469
AND TRY_CONVERT(NUMERIC(38,19), IMP_VALUE) BETWEEN 3.684 AND 4.225
It returns NULL without error when it cannot convert it.
Does anyone know if DB2 v9.1 z/OS supports Table Valued User Defined Functions?
This is what I am trying to create but I keep getting the error message below.
CREATE FUNCTION func_test(v_vchCol CHAR(10))
RETURNS TABLE(col_a char(10), row_cnt integer)
LANGUAGE SQL
SPECIFIC FUNCINFO
NOT DETERMINISTIC
READS SQL DATA
return
select col_1, count(*)
from SCHEMA_NAME.TEST1
where col_1 = v_vchCol
group by col_1;
Error Message:
ERROR [56038] [IBM][DB2] SQL0969N There is no message text
corresponding to SQL error "-4700" in the message file on this
workstation. The error was returned from module "DSNHSMS1" with
original tokens "". SQLSTATE=56038
Any help would be much appreciated
Yes, but it appears to require new function mode which apparently isn't enabled yet in the DB2 instance you're connected to.
I am do replicating of two database (SQL Server 2000 and PostgreSQL). I use http://blog.hagander.net/archives/103-Replicating-from-MS-SQL-Server-to-PostgreSQL.html for this. Then I do last step the
ERROR: operator does not exist: character = integer; Error executing the query
appeared. I use the PostgreSQL 8.4.6 for that and ODBC drivers (all psqlodbc_08_04_0100.zip, psqlodbc_08_04_0200.zip) from here i also try to delete and install version that Synaptic called 9.0.2-1 and update odbc drivers i try (psqlodbc_09_00_0100.zip, psqlodbc_09_00_0101.zip, psqlodbc_09_00_0200.zip) it also return that error. The query launched from delphi where i use only System DSN runs normally
You need to fix your SQL statement.
I bet you have something like
WHERE character_column = 1
and you need to change that to
WHERE character_column = '1'
use single quote 'your_value' for non numeric data and double quote for column name and never the opposite.
select status, sum(amount) as sum from "sales" where ("date" <= '2017-04-30 23:59:59' and "customer_id" = 1) and "sales"."deleted_at" is null group by "status"
I am writing a T-SQL program over a DB2 database on a LINUX box (DB2/LINUXX8664) using a linked server. I think the DB2 is Version 9.5.3 but not certain. I am receiving an error that I feel is likely a DB2 issue as the syntax checks out okay in T-SQL. This is the code:
IF(SELECT(OBJECT_ID('TEMPDB..#TempFile))) IS NOT NULL DROP TABLE #TempFile
SELECT *
INTO #TempFile
FROM OPENQUERY(LinkedServer, '
SELECT F.LOAN_NUMBER,
(SELECT
SUM(EXP_CHILD_CARE_AMOUNT) + SUM(EXP_FOOD_AMOUNT) +
SUM(EXP_LIFE_INSURANCE_AMOUNT) + SUM(EXP_TRANSPORTATION_AMOUNT) + SUM(EXP_TUITION_AMOUNT)+
SUM(EXP_USER_1_AMOUNT) + SUM(EXP_USER_2_AMOUNT) + SUM(EXP_USER_3_AMOUNT) +
SUM(EXP_UTILITIES_AMOUNT)
FROM FINANCIAL F)
AS ExpenseTotal,
(SELECT
SUM(MORTGAGOR_NET_PAY_AMOUNT) + SUM(MORTGAGOR_OTHER_INCOME_AMOUNT) AS IncomeTotal
FROM FINANCIAL F
INNER JOIN BDE.LOAN_V a ON F.LOAN_NUMBER = A.LOAN_NUMBER)
WHERE A.FIRST_PRINCIPAL_BALANCE> 0
GROUP BY F.LOAN_NUMBER
ORDER BY F.LOAN_NUMBER,
FETCH ONLY WITH UR ')
Here is the error:
OLE DB provider "MSDASQL" for linked server "LINKEDSERVER" returned message "[IBM][CLI Driver][DB2/LINUXX8664] SQL0104N An unexpected token "A" was found following "BER) WHERE". Expected tokens may include: "FROM". SQLSTATE=42601
".
Msg 7350, Level 16, State 2, Line 4
Cannot get the column information from OLE DB provider "MSDASQL" for linked server "LINKEDSERVER".
= A.LOAN_NUMBER)
WHERE A.FIRST_PRINCIPAL_BALANCE> 0 - that bracket looks out of place.
The first thing I notice is that you have a naked query, which is not uncommon in Microsoft SQL Server. A simplified version of your linked query looks like this:
SELECT (subquery), (subquery) WHERE ...conditions...
In DB2, you must have a FROM clause in any query. Microsoft and some other SQL vendors permit a SELECT with no FROM clause, but this isn't standard SQL. In this case, DB2 conforms to the standard.
Second thing I notice:
IF(SELECT(OBJECT_ID('TEMPDB..#TempFile))) IS NOT NULL DROP TABLE #TempFile
Do you need to close that quoted string?