I am trying to search text from multiple tables using FTS3 in android sqlite.
But its giving NO SUCH TABLE exception. tables are creating and tried changing database name and version.But it didnt work.
Could any one help. wts causing the issue.??
This is my query statement :
SQLiteQueryBuilder builder = new SQLiteQueryBuilder();
builder.setTables("FTS_VIRTUAL_TABLE,FTS_VIRTUAL_TABLE_NEW");
builder.setProjectionMap(mColumnMap);
Cursor cursor = builder.query(
mDatabaseOpenHelper.getReadableDatabase(), columns, selection,
selectionArgs, null, null, null);
and the error i m getting is ...
08-01 04:43:58.412: W/SuggestionsAdapter(5069): android.database.sqlite.SQLiteException: no such table: FTS_VIRTUAL_TABLE (code 1): , while compiling: SELECT _id, suggest_text_1, suggest_text_2, suggest_text_1, suggest_text_2, suggest_intent_data_id FROM FTS_VIRTUAL_TABLE,FTS_VIRTUAL_TABLE_NEW WHERE (suggest_text_1 MATCH ?)
("FTS_VIRTUAL_TABLE","FTS_VIRTUAL_TABLE_NEW")
it should be like this or if these are constant variables than no need double quotes, simply write
(FTS_VIRTUAL_TABLE,FTS_VIRTUAL_TABLE_NEW)
and use column name with Table Name followed by dot followed by column name.
or I suggest use simple query rather than using SQLiteQueryBuilder.
Related
I'm writing a Java application to automatically build and run SQL queries. For many tables my code works fine but on a certain table it gets stuck by throwing the following exception:
Exception in thread "main" org.postgresql.util.PSQLException: ERROR: column "continent" does not exist
Hint: Perhaps you meant to reference the column "countries.Continent".
Position: 8
The query that has been run is the following:
SELECT Continent
FROM network.countries
WHERE Continent IS NOT NULL
AND Continent <> ''
LIMIT 5
This essentially returns 5 non-empty values from the column.
I don't understand why I'm getting the "column does not exist" error when it clearly does in pgAdmin 4. I can see that there is a schema with the name Network which contains the table countries and that table has a column called Continent just as expected.
Since all column, schema and table names are retrieved by the application itself I don't think there has been a spelling or semantical error so why does PostgreSQL cause problems regardless? Running the query in pgAdmin4 nor using the suggested countries.Continent is working.
My PostgreSQL version is the newest as of now:
$ psql --version
psql (PostgreSQL) 9.6.1
How can I successfully run the query?
Try to take it into double quotes - like "Continent" in the query:
SELECT "Continent"
FROM network.countries
...
In working with SQLAlchemy environment, i have got this error with the SQL like this,
db.session.execute(
text('SELECT name,type,ST_Area(geom) FROM buildings WHERE type == "plaza" '))
ERROR: column "plaza" does not exist
Well, i changed == by = , Error still persists, then i interchanged the quotes, like follows. It worked. Weird!
....
text("SELECT name,type,ST_Area(geom) FROM buildings WHERE type = 'plaza' "))
This problem occurs in postgres because the table name is not tablename instead it is "tablename".
for eg.
If it shows user as table name,
than table name is "user".
See this:
Such an error can appear when you add a space in the name of a column by mistake (for example "users ").
QUICK FIX (TRICK)
If you have recently added a field which you have already deleted before and now trying to add the same field back then let me share you this simple trick! i did this and the problem was gone!!
so, now just delete the migration folder entirely on the app,then instead of adding that field you need to now add a field but with the name of which you have never declared on this app before, example if you are trying to add title field then create it by the name of heading and now do the migration process separately on the app and runserver, now go to admin page and look for that model and delete all the objects and come to models back and rename the field that you recently made and name it to which you were wishing it with earlier and do the migrations again and now your problem must have been gone!!
this occurs when the objects are there in the db but you added a field which wasn't there when the earlier objs were made, so by this we can delete those objs and make fresh ones again!
I got the same error when I do PIVOT in RedShift.
My code is similar to
SELECT *
INTO output_table
FROM (
SELECT name, year_month, sales
FROM input_table
)
PIVOT
(
SUM(sales)
FOR year_month IN ('nov_2020', 'dec_2020', 'jan_2021', 'feb_2021', 'mar_2021', 'apr_2021', 'may_2021', 'jun_2021', 'jul_2021', 'aug_2021',
'sep_2021', 'oct_2021', 'nov_2021', 'dec_2021', 'jan_2022', 'feb_2022', 'mar_2022', 'apr_2022', 'may_2022', 'jun_2022',
'jul_2022', 'aug_2022', 'sep_2022', 'oct_2022', 'nov_2022')
)
I tried year_month without any quote (got the error), year_month with double quote (got the error), and finally year_month with single quote (it works this time). This may help if someone in the same situation like my example.
I'm writing a Java application to automatically build and run SQL queries. For many tables my code works fine but on a certain table it gets stuck by throwing the following exception:
Exception in thread "main" org.postgresql.util.PSQLException: ERROR: column "continent" does not exist
Hint: Perhaps you meant to reference the column "countries.Continent".
Position: 8
The query that has been run is the following:
SELECT Continent
FROM network.countries
WHERE Continent IS NOT NULL
AND Continent <> ''
LIMIT 5
This essentially returns 5 non-empty values from the column.
I don't understand why I'm getting the "column does not exist" error when it clearly does in pgAdmin 4. I can see that there is a schema with the name Network which contains the table countries and that table has a column called Continent just as expected.
Since all column, schema and table names are retrieved by the application itself I don't think there has been a spelling or semantical error so why does PostgreSQL cause problems regardless? Running the query in pgAdmin4 nor using the suggested countries.Continent is working.
My PostgreSQL version is the newest as of now:
$ psql --version
psql (PostgreSQL) 9.6.1
How can I successfully run the query?
Try to take it into double quotes - like "Continent" in the query:
SELECT "Continent"
FROM network.countries
...
In working with SQLAlchemy environment, i have got this error with the SQL like this,
db.session.execute(
text('SELECT name,type,ST_Area(geom) FROM buildings WHERE type == "plaza" '))
ERROR: column "plaza" does not exist
Well, i changed == by = , Error still persists, then i interchanged the quotes, like follows. It worked. Weird!
....
text("SELECT name,type,ST_Area(geom) FROM buildings WHERE type = 'plaza' "))
This problem occurs in postgres because the table name is not tablename instead it is "tablename".
for eg.
If it shows user as table name,
than table name is "user".
See this:
Such an error can appear when you add a space in the name of a column by mistake (for example "users ").
QUICK FIX (TRICK)
If you have recently added a field which you have already deleted before and now trying to add the same field back then let me share you this simple trick! i did this and the problem was gone!!
so, now just delete the migration folder entirely on the app,then instead of adding that field you need to now add a field but with the name of which you have never declared on this app before, example if you are trying to add title field then create it by the name of heading and now do the migration process separately on the app and runserver, now go to admin page and look for that model and delete all the objects and come to models back and rename the field that you recently made and name it to which you were wishing it with earlier and do the migrations again and now your problem must have been gone!!
this occurs when the objects are there in the db but you added a field which wasn't there when the earlier objs were made, so by this we can delete those objs and make fresh ones again!
I got the same error when I do PIVOT in RedShift.
My code is similar to
SELECT *
INTO output_table
FROM (
SELECT name, year_month, sales
FROM input_table
)
PIVOT
(
SUM(sales)
FOR year_month IN ('nov_2020', 'dec_2020', 'jan_2021', 'feb_2021', 'mar_2021', 'apr_2021', 'may_2021', 'jun_2021', 'jul_2021', 'aug_2021',
'sep_2021', 'oct_2021', 'nov_2021', 'dec_2021', 'jan_2022', 'feb_2022', 'mar_2022', 'apr_2022', 'may_2022', 'jun_2022',
'jul_2022', 'aug_2022', 'sep_2022', 'oct_2022', 'nov_2022')
)
I tried year_month without any quote (got the error), year_month with double quote (got the error), and finally year_month with single quote (it works this time). This may help if someone in the same situation like my example.
I have a column of type TEXT which is supposed to represent a CLOB value and I'm trying to update its value like this:
UPDATE my_table SET my_column = TEXT 'Text value';
Normally this column is written and read by Hibernate and I noticed that values written with Hibernate are stored as integers (perhaps some internal Postgres reference to the CLOB data).
But when I try to update the column with the above SQL, the value is stored as a string and when Hibernate tries to read it, I get the following error: Bad value for type long : ["Text value"]
I tried all the options described in this answer but the result is always the same. How do I insert/update a TEXT column using SQL?
In order to update a cblob created by Hibernate you should use functions to handling large objects:
the documentation can be found in the following links:
https://www.postgresql.org/docs/current/lo-interfaces.html
https://www.postgresql.org/docs/current/lo-funcs.html
Examples:
To query:
select mytable.*, convert_from(loread(lo_open(mycblobfield::int, x'40000'::int), x'40000'::int), 'UTF8') from mytable where mytable.id = 4;
Obs:
x'40000' is corresponding to read mode (INV_WRITE)
To Update:
select lowrite(lo_open(16425, x'60000'::int), convert_to('this an updated text','UTF8'));
Obs:
x'60000' = INV_WRITE + INV_READ is corresponding to read and write mode (INV_WRITE + IV_READ).
The number 16425 is an example loid (large object id) which already exists in a record in your table. It's that integer number you can see as value in the blob field created by Hinernate.
To Insert:
select lowrite(lo_open(lo_creat(-1), x'60000'::int), convert_to('this is a new text','UTF8'));
Obs:
lo_creat(-1) generate a new large object a returns its loid
I am trying to run a query that has a where clause with a string from a column of type VARCHAR(50) through PHP, yet for some reason it does not work in either PHP or MySQLWorkbench. My database looks like:
Database Picture:
The table title is 'paranoia' where the column 'codename' is VARCHAR(50) and 'target' is VARCHAR(50). The query I am trying to run takes the form, when searching for a codename entry clearly named '13Brownie' with no spaces, as follows:
UPDATE paranoia SET target='sd' WHERE codename='13Brownie'
Yet for some reason passing a string to the argument for codename is ineffective. The WHERE clause works when I do codename=7 or codename=3 and returns those respective integer codenames, and I can do codename=0 to get all the other lettered codenames. The string input works in neither MySQLWorkbench or the PHP script I will be using to update such selected rows, but again the integer input does.
It seems like the WHERE clause is only taking the integer values of my string input or the column is actually made up of the integer values of each entry, but the column codename is clearly defined as VARCHAR(50). I have been searching for hours but to no avail.
It is likely that there are white-space characters in the data. Things to try:
SELECT * FROM paranoia WHERE codename like '13%'
SELECT * FROM paranoia WHERE codename = '13Brownie '
SELECT codename, LEN(codename) FROM paranoia
VARCHAR(10) is a valid type to accept a string of at most 10 characters. I think this can possibly happen because of a foreign key constraint enforced with another table. check if you have this constraint using the "relation view" if you are on phpmyadmin.
I would like to know how I can insert regular expression in a table column in a PostgreSQl table.
For example I have column called "rule" in a table where I need to store the expression ^[0-9]+$. I tried:
insert into rule_master(rule)
values('^[0-9]+$') where rule_id='7'
But I am getting error syntax near where is wrong. I tried this with and with out single quotes. Please suggest me a solution.
It appears you want to UPDATE an existing record. In that case you should do:
UPDATE rule_master
SET rule = '^[0-9]+$'
WHERE rule_id = '7';
But if this is indeed a new record and you want to INSERT that regex with the value of "rule_id" then do:
INSERT INTO rule_master(rule_id, rule)
VALUES ('7', '^[0-9]+$');