I am doing my crm project with SQLITE+FLASK. And I need a feature is let user to input the condition to filer the result.
I hope that my SQL statement can ignore the WHERE condition if the parameter is space or null.
For example, My input is "NAME", "AGE", "GENDER"
so my statement will be
SELECT *
FROM CUSTOMER
WHERE NAME = 'James' AND AGE = '25' AND GENDER = 'M'
But I hope that if user did not enter "NAME" my SQL statement can be something like the code below
SELECT *
FROM CUSTOMER
WHERE AGE = '25' AND GENDER = 'M'
I know maybe I can do this with string concat, but I hope I can do this by SQL statement.
You can do it with the OR operator for each of the columns, by checking also if the parameter value that you pass is NULL or a string with spaces:
SELECT *
FROM CUSTOMER
WHERE (NAME = :name OR TRIM(COALESCE(:name, '')) = '')
AND (AGE = :age OR TRIM(COALESCE(:age, '')) = '')
AND (GENDER = :gender OR TRIM(COALESCE(:gender, '')) = '')
You can use null condition as follows:
SELECT *
FROM CUSTOMER
WHERE (NAME = :name_input or :name_input is null)
AND (AGE = :age_input or :age_input is null)
AND (GENDER = :gender_input or :gender_input is null)
I have a query against a UDF where I want to allow the user to pass in either ALL or a specific EType.
If they pass in ALL, I want to accept all ETypes where it is not null.
I have searched thru SO for examples and not seem to meet my particular situation.
Where am I going wrong?
Declare
#company varchar(4),
#charge_cov bit,
#EType varchar(8);
set #company = '123'
set #charge_cov =1
set #EType = 'ALL'
select e.emp_id,
dbo.format_emp_number(pd.EN) as EN,
dbo.format_emp_number(pd.MEN) as MEN,
pd.EType
from dbo.employee_payroll_data(NULL) pd
inner join employee e on (e.emp_id=pd.emp_id)
where pd.EType = case when #EType='ALL' then pd.EType
else #EType ) END
and pd.EType is not null
and e.emp_number is not null
and e.charge_cov = 1
and lc.pr_co_code = #company
Try below code:
WHERE (((1 = (CASE WHEN #EType = 'ALL' THEN 1 ELSE 0 END)))
OR ((pd.Etype = (CASE WHEN #EType <> 'ALL' THEN #EType ELSE '' END))))
AND pd.Etype IS NOT NULL
I want to produce a DQL for following MySQL query:
SELECT * FROM `folders` AS `t` WHERE `t`.`Library` = #myLib AND AND `t`.`Id` NOT IN (
SELECT DISTINCT(`f`.`Id`) FROM `folders` AS `f` JOIN `folders` AS `ff` ON (`f`.`Position` LIKE CONCAT(`ff`.`Position`, '%')) WHERE `ff`.`Active` = 1 AND `ff`.`Library` = #myLib AND `f`.`Library` = #myLib
)
ORDER BY `t`.`Position` ASC
The query works fine in mySQL and returns correct records.
To generate DQL I've tried both below options:
1.
$query = $em->createQuery("SELECT F FROM MyBundle:Folders T WHERE T.Library = :libid AND T.id NOT IN (
SELECT DISTINCT(F.id) FROM MyBundle:Folders F JOIN MyBundle:Folders FF WITH F.Position LIKE CONCAT(FF.Position, '%') AND F.Library = :libid AND FF.Library = :libid AND FF.Active = true
) ORDER BY T.Position ASC")
->setParameter('libid', $library);
$result = $query->getResult();
2.
$q1 = $this->createQueryBuilder('F')
->select('DISTINCT(F.id)');
$q1->join('\MyBundle\Entity\Folders', 'FF', 'WITH', $q1->expr()->like('F.Position', $q1->expr()->literal('CONCAT(FF.Position, \'%\')')))
->where('FF.Active = true')
->andWhere("FF.Library = '$library'")
->andWhere("F.Library = '$library'");
$q2 = $this->createQueryBuilder('T');
$q2->where('T.Library = :libid')
->andWhere($q2->expr()->notIn('T.id', $q1->getDQL()))
->setParameter('libid', $library)
->orderBy('T.Position', 'ASC');
$result = $q2->getQuery()->getResult();
In my perspective it seems OK but I don't know why in both ways it produce following exception:
ContextErrorException: Warning: Illegal offset type in
/var/www/Symfony/vendor/doctrine/orm/lib/Doctrine/ORM/Query/SqlWalker.php line 601
Any help will be appreciated.
It seems no one has an answer for this. I found a temporary solution as below (I call it temporary because I'm changing my unique query to two separate queries and it seems the issue is in core of doctrine).
$qb = $this->createQueryBuilder('F')
->select('DISTINCT(F.id)');
$qb->join('\MyBundle\Entity\Folders', 'FF', 'WITH', 'F.Position LIKE CONCAT(FF.Position, \'%\')')
->where('FF.Active = true')
->andWhere("FF.Library = :library")
->andWhere("F.Library = :library")
->setParameter('library', $library);
$included_folders = $qb->getQuery()->getArrayResult();
$query = $this->createQueryBuilder('F')
->where('F.Active = false')
->andWhere('F.Library = :library')
->setParameter('library', $library)
->orderBy('F.Position', 'ASC');
if (!empty($included_folders)) {
if (count($included_folders) > 1)
{
foreach ($included_folders as $index => $value)
{
if (is_array($value))
{
$included_folders[$index] = !empty($value['id']) ? $value['id'] : $value[1];
}
}
$query->andWhere($query->expr()->notIn('F.id', $included_folders));
}
else {
$query->andWhere('F.id != :folder ')
->setParameter('folder', $included_folders[0]);
}
}
$result = $query->getQuery()->getResult();
As you see instead of getting the dql from my first query and putting it inside my second dql in notIn section which will lead to the warning message, I execute the first query and get the results then put the results inside notIn if amount of returned values are more than one, otherwise it should be in regular !=. This solved my problem for now, but as you see amount of transactions are now increased
If anyone has a better solution or any fix for the warning I will be thankful.
I've encountered the same error and it seems that this has been fixed in latest trunk of Doctrine/ORM.
Using "2.5.*#dev" as version in your composer.json for doctrine/orm should fix this bug and will let you do what you want in a single query.
I have a date field on an XPage, this control may contain a date or be blank. In a repeat control I have this code:
var doc:NotesDocument = detailData.getDocument();
var sDate = doc.getItemValue("ACAutoStart");
doc.recycle()
return "Start Date = " + sDate
If ACAutoStart contains a date then it is displayed as [10/10/2013 12:34:15 AM MDT] if it is blank it displays as []. As I understand it the [] indicates that the result is an array but if I try using sDate[0] there is an error. I can't use getItemValueDateTime as it does not like the null return. How do I get this into a simple string value?
Replace your last line with return "Start Date = " + sDate.firstElement().
doc.getItemValue() returns an object of class java.util.Vector. As it is not an Array you get the first element with firstElement() instead of [0] .
UPDATE:
As you mentioned in your comment it has to work also for empty values and you added try:
var sDate = "";
try {sDate = doc.getItemValue("ACAutoStart").firstElement()} catch (e) {};
return "Start Date = " + sDate
...just as another way (returns converted NotesDateTime to Date):
function getJavaDateData(doc:NotesDocument, field:string)
{
var item:NotesItem = doc.getFirstItem(field);
if (item != null){
var dt:NotesDateTime = item.getDateTimeValue();
if (dt != null){
return dt.toJavaDate();
}
}
return null;
}
Off-course need to be adapted for your logic...
Is it possible to get a row with all column names of a table like this?
|id|foo|bar|age|street|address|
I don't like to use Pragma table_info(bla).
SELECT sql FROM sqlite_master
WHERE tbl_name = 'table_name' AND type = 'table'
Then parse this value with Reg Exp (it's easy) which could looks similar to this: [(.*?)]
Alternatively you can use:
PRAGMA table_info(table_name)
If you are using the command line shell to SQLite then .headers on before you perform your query. You only need to do this once in a given session.
You can use pragma related commands in sqlite like below
pragma table_info("table_name")
--Alternatively
select * from pragma_table_info("table_name")
If you require column names like id|foo|bar|age|street|address, basically your answer is in below query.
select group_concat(name,'|') from pragma_table_info("table_name")
Yes, you can achieve this by using the following commands:
sqlite> .headers on
sqlite> .mode column
The result of a select on your table will then look like:
id foo bar age street address
---------- ---------- ---------- ---------- ---------- ----------
1 val1 val2 val3 val4 val5
2 val6 val7 val8 val9 val10
This helps for HTML5 SQLite:
tx.executeSql('SELECT name, sql FROM sqlite_master WHERE type="table" AND name = "your_table_name";', [], function (tx, results) {
var columnParts = results.rows.item(0).sql.replace(/^[^\(]+\(([^\)]+)\)/g, '$1').split(','); ///// RegEx
var columnNames = [];
for(i in columnParts) {
if(typeof columnParts[i] === 'string')
columnNames.push(columnParts[i].split(" ")[0]);
}
console.log(columnNames);
///// Your code which uses the columnNames;
});
You can reuse the regex in your language to get the column names.
Shorter Alternative:
tx.executeSql('SELECT name, sql FROM sqlite_master WHERE type="table" AND name = "your_table_name";', [], function (tx, results) {
var columnNames = results.rows.item(0).sql.replace(/^[^\(]+\(([^\)]+)\)/g, '$1').replace(/ [^,]+/g, '').split(',');
console.log(columnNames);
///// Your code which uses the columnNames;
});
Use a recursive query. Given
create table t (a int, b int, c int);
Run:
with recursive
a (cid, name) as (select cid, name from pragma_table_info('t')),
b (cid, name) as (
select cid, '|' || name || '|' from a where cid = 0
union all
select a.cid, b.name || a.name || '|' from a join b on a.cid = b.cid + 1
)
select name
from b
order by cid desc
limit 1;
Alternatively, just use group_concat:
select '|' || group_concat(name, '|') || '|' from pragma_table_info('t')
Both yield:
|a|b|c|
The result set of a query in PHP offers a couple of functions allowing just that:
numCols()
columnName(int $column_number )
Example
$db = new SQLIte3('mysqlite.db');
$table = 'mytable';
$tableCol = getColName($db, $table);
for ($i=0; $i<count($tableCol); $i++){
echo "Column $i = ".$tableCol[$i]."\n";
}
function getColName($db, $table){
$qry = "SELECT * FROM $table LIMIT 1";
$result = $db->query($qry);
$nCols = $result->numCols();
for ($i = 0; $i < $ncols; $i++) {
$colName[$i] = $result->columnName($i);
}
return $colName;
}
$<?
$db = sqlite_open('mysqlitedb');
$cols = sqlite_fetch_column_types('form name'$db, SQLITE_ASSOC);
foreach ($cols as $column => $type) {
echo "Column: $column Type: $type\n";
}
Using #Tarkus's answer, here are the regexes I used in R:
getColNames <- function(conn, tableName) {
x <- dbGetQuery( conn, paste0("SELECT sql FROM sqlite_master WHERE tbl_name = '",tableName,"' AND type = 'table'") )[1,1]
x <- str_split(x,"\\n")[[1]][-1]
x <- sub("[()]","",x)
res <- gsub( '"',"",str_extract( x[1], '".+"' ) )
x <- x[-1]
x <- x[-length(x)]
res <- c( res, gsub( "\\t", "", str_extract( x, "\\t[0-9a-zA-Z_]+" ) ) )
res
}
Code is somewhat sloppy, but it appears to work.
Try this sqlite table schema parser, I implemented the sqlite table parser for parsing the table definitions in PHP.
It returns the full definitions (unique, primary key, type, precision, not null, references, table constraints... etc)
https://github.com/maghead/sqlite-parser
Easiest way to get the column names of the most recently executed SELECT is to use the cursor's description property. A Python example:
print_me = "("
for description in cursor.description:
print_me += description[0] + ", "
print(print_me[0:-2] + ')')
# Example output: (inp, output, reason, cond_cnt, loop_likely)