SQLiteQueryBuilder
public
class
SQLiteQueryBuilder
extends Object
java.lang.Object | |
↳ | android.database.sqlite.SQLiteQueryBuilder |
This is a convenience class that helps build SQL queries to be sent to
SQLiteDatabase
objects.
This class is often used to compose a SQL query from client-supplied fragments. Best practice to protect against invalid or illegal SQL is to set the following:
setStrict(boolean)
true.setProjectionMap(Map)
with the list of queryable columns.setStrictColumns(boolean)
true.setStrictGrammar(boolean)
true.
Summary
Public constructors | |
---|---|
SQLiteQueryBuilder()
|
Public methods | |
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static
void
|
appendColumns(StringBuilder s, String[] columns)
Add the names that are non-null in columns to s, separating them with commas. |
void
|
appendWhere(CharSequence inWhere)
Append a chunk to the |
void
|
appendWhereEscapeString(String inWhere)
Append a chunk to the |
void
|
appendWhereStandalone(CharSequence inWhere)
Add a standalone chunk to the |
String
|
buildQuery(String[] projectionIn, String selection, String groupBy, String having, String sortOrder, String limit)
Construct a |
String
|
buildQuery(String[] projectionIn, String selection, String[] selectionArgs, String groupBy, String having, String sortOrder, String limit)
This method was deprecated
in API level 15.
This method's signature is misleading since no SQL parameter
substitution is carried out. The selection arguments parameter does not get
used at all. To avoid confusion, call
|
static
String
|
buildQueryString(boolean distinct, String tables, String[] columns, String where, String groupBy, String having, String orderBy, String limit)
Build an SQL query string from the given clauses. |
String
|
buildUnionQuery(String[] subQueries, String sortOrder, String limit)
Given a set of subqueries, all of which are |
String
|
buildUnionSubQuery(String typeDiscriminatorColumn, String[] unionColumns, Set<String> columnsPresentInTable, int computedColumnsOffset, String typeDiscriminatorValue, String selection, String[] selectionArgs, String groupBy, String having)
This method was deprecated
in API level 15.
This method's signature is misleading since no SQL parameter
substitution is carried out. The selection arguments parameter does not get
used at all. To avoid confusion, call
|
String
|
buildUnionSubQuery(String typeDiscriminatorColumn, String[] unionColumns, Set<String> columnsPresentInTable, int computedColumnsOffset, String typeDiscriminatorValue, String selection, String groupBy, String having)
Construct a |
int
|
delete(SQLiteDatabase db, String selection, String[] selectionArgs)
Perform a delete by combining all current settings and the information passed into this method. |
SQLiteDatabase.CursorFactory
|
getCursorFactory()
Gets the cursor factory to be used for the query, as last configured by
|
Collection<Pattern>
|
getProjectionGreylist()
Gets the projection greylist for the query, as last configured by
|
Map<String, String>
|
getProjectionMap()
Gets the projection map for the query, as last configured by
|
String
|
getTables()
Returns the list of tables being queried |
long
|
insert(SQLiteDatabase db, ContentValues values)
Perform an insert by combining all current settings and the information passed into this method. |
boolean
|
isDistinct()
Get if the query is marked as |
boolean
|
isStrict()
Get if the query is marked as strict, as last configured by
|
boolean
|
isStrictColumns()
Get if the query is marked as strict, as last configured by
|
boolean
|
isStrictGrammar()
Get if the query is marked as strict, as last configured by
|
Cursor
|
query(SQLiteDatabase db, String[] projectionIn, String selection, String[] selectionArgs, String groupBy, String having, String sortOrder)
Perform a query by combining all current settings and the information passed into this method. |
Cursor
|
query(SQLiteDatabase db, String[] projectionIn, String selection, String[] selectionArgs, String groupBy, String having, String sortOrder, String limit)
Perform a query by combining all current settings and the information passed into this method. |
Cursor
|
query(SQLiteDatabase db, String[] projectionIn, String selection, String[] selectionArgs, String groupBy, String having, String sortOrder, String limit, CancellationSignal cancellationSignal)
Perform a query by combining all current settings and the information passed into this method. |
void
|
setCursorFactory(SQLiteDatabase.CursorFactory factory)
Sets the cursor factory to be used for the query. |
void
|
setDistinct(boolean distinct)
Mark the query as |
void
|
setProjectionGreylist(Collection<Pattern> projectionGreylist)
Sets a projection greylist of columns that will be allowed through, even
when |
void
|
setProjectionMap(Map<String, String> columnMap)
Sets the projection map for the query. |
void
|
setStrict(boolean strict)
When set, the selection is verified against malicious arguments. |
void
|
setStrictColumns(boolean strictColumns)
When enabled, verify that all projections and |
void
|
setStrictGrammar(boolean strictGrammar)
When enabled, verify that all untrusted SQL conforms to a restricted SQL grammar. |
void
|
setTables(String inTables)
Sets the list of tables to query. |
int
|
update(SQLiteDatabase db, ContentValues values, String selection, String[] selectionArgs)
Perform an update by combining all current settings and the information passed into this method. |
Inherited methods | |
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Public constructors
Public methods
appendColumns
public static void appendColumns (StringBuilder s, String[] columns)
Add the names that are non-null in columns to s, separating them with commas.
Parameters | |
---|---|
s |
StringBuilder |
columns |
String |
appendWhere
public void appendWhere (CharSequence inWhere)
Append a chunk to the WHERE
clause of the query. All chunks appended are surrounded
by parenthesis and AND
ed with the selection passed to query(SQLiteDatabase, String, String, String, String, String, String)
. The final
WHERE
clause looks like:
WHERE (<append chunk 1><append chunk2>) AND (<query() selection parameter>)
Parameters | |
---|---|
inWhere |
CharSequence : the chunk of text to append to the WHERE clause.
This value cannot be null . |
appendWhereEscapeString
public void appendWhereEscapeString (String inWhere)
Append a chunk to the WHERE
clause of the query. All chunks appended are surrounded
by parenthesis and ANDed with the selection passed to query(SQLiteDatabase, String, String, String, String, String, String)
. The final
WHERE
clause looks like:
WHERE (<append chunk 1><append chunk2>) AND (<query() selection parameter>)
Parameters | |
---|---|
inWhere |
String : the chunk of text to append to the WHERE clause. it will be escaped
to avoid SQL injection attacks
This value cannot be null . |
appendWhereStandalone
public void appendWhereStandalone (CharSequence inWhere)
Add a standalone chunk to the WHERE
clause of this query.
This method differs from appendWhere(java.lang.CharSequence)
in that it
automatically appends AND
to any existing WHERE
clause
already under construction before appending the given standalone
expression wrapped in parentheses.
Parameters | |
---|---|
inWhere |
CharSequence : the standalone expression to append to the WHERE
clause. It will be wrapped in parentheses when it's appended.
This value cannot be null . |
buildQuery
public String buildQuery (String[] projectionIn, String selection, String groupBy, String having, String sortOrder, String limit)
Construct a SELECT
statement suitable for use in a group of
SELECT
statements that will be joined through UNION
operators
in buildUnionQuery.
Parameters | |
---|---|
projectionIn |
String : A list of which columns to return. Passing
null will return all columns, which is discouraged to
prevent reading data from storage that isn't going to be
used. |
selection |
String : A filter declaring which rows to return,
formatted as an SQL WHERE clause (excluding the WHERE
itself). Passing null will return all rows for the given
URL. |
groupBy |
String : A filter declaring how to group rows, formatted
as an SQL GROUP BY clause (excluding the GROUP BY itself).
Passing null will cause the rows to not be grouped. |
having |
String : A filter declare which row groups to include in
the cursor, if row grouping is being used, formatted as an
SQL HAVING clause (excluding the HAVING itself). Passing
null will cause all row groups to be included, and is
required when row grouping is not being used. |
sortOrder |
String : How to order the rows, formatted as an SQL
ORDER BY clause (excluding the ORDER BY itself). Passing null
will use the default sort order, which may be unordered. |
limit |
String : Limits the number of rows returned by the query,
formatted as LIMIT clause. Passing null denotes no LIMIT clause. |
Returns | |
---|---|
String |
the resulting SQL SELECT statement |
buildQuery
public String buildQuery (String[] projectionIn, String selection, String[] selectionArgs, String groupBy, String having, String sortOrder, String limit)
This method was deprecated
in API level 15.
This method's signature is misleading since no SQL parameter
substitution is carried out. The selection arguments parameter does not get
used at all. To avoid confusion, call
buildQuery(java.lang.String[], java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String)
instead.
Parameters | |
---|---|
projectionIn |
String |
selection |
String |
selectionArgs |
String |
groupBy |
String |
having |
String |
sortOrder |
String |
limit |
String |
Returns | |
---|---|
String |
buildQueryString
public static String buildQueryString (boolean distinct, String tables, String[] columns, String where, String groupBy, String having, String orderBy, String limit)
Build an SQL query string from the given clauses.
Parameters | |
---|---|
distinct |
boolean : true if you want each row to be unique, false otherwise. |
tables |
String : The table names to compile the query against. |
columns |
String : A list of which columns to return. Passing null will
return all columns, which is discouraged to prevent reading
data from storage that isn't going to be used. |
where |
String : A filter declaring which rows to return, formatted as an SQL
WHERE clause (excluding the WHERE itself). Passing null will
return all rows for the given URL. |
groupBy |
String : A filter declaring how to group rows, formatted as an SQL
GROUP BY clause (excluding the GROUP BY itself). Passing null
will cause the rows to not be grouped. |
having |
String : A filter declare which row groups to include in the cursor,
if row grouping is being used, formatted as an SQL HAVING
clause (excluding the HAVING itself). Passing null will cause
all row groups to be included, and is required when row
grouping is not being used. |
orderBy |
String : How to order the rows, formatted as an SQL ORDER BY clause
(excluding the ORDER BY itself). Passing null will use the
default sort order, which may be unordered. |
limit |
String : Limits the number of rows returned by the query,
formatted as LIMIT clause. Passing null denotes no LIMIT clause. |
Returns | |
---|---|
String |
the SQL query string |
buildUnionQuery
public String buildUnionQuery (String[] subQueries, String sortOrder, String limit)
Given a set of subqueries, all of which are SELECT
statements,
construct a query that returns the union of what those
subqueries return.
Parameters | |
---|---|
subQueries |
String : an array of SQL SELECT statements, all of
which must have the same columns as the same positions in
their results |
sortOrder |
String : How to order the rows, formatted as an SQL
ORDER BY clause (excluding the ORDER BY itself). Passing
null will use the default sort order, which may be unordered. |
limit |
String : The limit clause, which applies to the entire union result set |
Returns | |
---|---|
String |
the resulting SQL SELECT statement |
buildUnionSubQuery
public String buildUnionSubQuery (String typeDiscriminatorColumn, String[] unionColumns, Set<String> columnsPresentInTable, int computedColumnsOffset, String typeDiscriminatorValue, String selection, String[] selectionArgs, String groupBy, String having)
This method was deprecated
in API level 15.
This method's signature is misleading since no SQL parameter
substitution is carried out. The selection arguments parameter does not get
used at all. To avoid confusion, call
buildUnionSubQuery(String, String, Set, int, String, String, String, String)
instead.
Parameters | |
---|---|
typeDiscriminatorColumn |
String |
unionColumns |
String |
columnsPresentInTable |
Set |
computedColumnsOffset |
int |
typeDiscriminatorValue |
String |
selection |
String |
selectionArgs |
String |
groupBy |
String |
having |
String |
Returns | |
---|---|
String |
buildUnionSubQuery
public String buildUnionSubQuery (String typeDiscriminatorColumn, String[] unionColumns, Set<String> columnsPresentInTable, int computedColumnsOffset, String typeDiscriminatorValue, String selection, String groupBy, String having)
Construct a SELECT
statement suitable for use in a group of
SELECT
statements that will be joined through UNION
operators
in buildUnionQuery.
Parameters | |
---|---|
typeDiscriminatorColumn |
String : the name of the result column
whose cells will contain the name of the table from which
each row was drawn. |
unionColumns |
String : the names of the columns to appear in the
result. This may include columns that do not appear in the
table this SELECT is querying (i.e. mTables), but that do
appear in one of the other tables in the UNION query that we
are constructing. |
columnsPresentInTable |
Set : a Set of the names of the columns
that appear in this table (i.e. in the table whose name is
mTables). Since columns in unionColumns include columns that
appear only in other tables, we use this array to distinguish
which ones actually are present. Other columns will have
NULL values for results from this subquery. |
computedColumnsOffset |
int : all columns in unionColumns before
this index are included under the assumption that they're
computed and therefore won't appear in columnsPresentInTable,
e.g. "date * 1000 as normalized_date" |
typeDiscriminatorValue |
String : the value used for the
type-discriminator column in this subquery |
selection |
String : A filter declaring which rows to return,
formatted as an SQL WHERE clause (excluding the WHERE
itself). Passing null will return all rows for the given
URL. |
groupBy |
String : A filter declaring how to group rows, formatted
as an SQL GROUP BY clause (excluding the GROUP BY itself).
Passing null will cause the rows to not be grouped. |
having |
String : A filter declare which row groups to include in
the cursor, if row grouping is being used, formatted as an
SQL HAVING clause (excluding the HAVING itself). Passing
null will cause all row groups to be included, and is
required when row grouping is not being used. |
Returns | |
---|---|
String |
the resulting SQL SELECT statement |
delete
public int delete (SQLiteDatabase db, String selection, String[] selectionArgs)
Perform a delete by combining all current settings and the information passed into this method.
Parameters | |
---|---|
db |
SQLiteDatabase : the database to delete on
This value cannot be null . |
selection |
String : A filter declaring which rows to return,
formatted as an SQL WHERE clause (excluding the WHERE
itself). Passing null will return all rows for the given URL. |
selectionArgs |
String : You may include ?s in selection, which
will be replaced by the values from selectionArgs, in order
that they appear in the selection. The values will be bound
as Strings.
This value may be null . |
Returns | |
---|---|
int |
the number of rows deleted |
getCursorFactory
public SQLiteDatabase.CursorFactory getCursorFactory ()
Gets the cursor factory to be used for the query, as last configured by
setCursorFactory(android.database.sqlite.SQLiteDatabase.CursorFactory)
.
Returns | |
---|---|
SQLiteDatabase.CursorFactory |
This value may be null . |
getProjectionGreylist
public Collection<Pattern> getProjectionGreylist ()
Gets the projection greylist for the query, as last configured by
setProjectionGreylist(Collection)
.
Returns | |
---|---|
Collection<Pattern> |
This value may be null . |
getProjectionMap
public Map<String, String> getProjectionMap ()
Gets the projection map for the query, as last configured by
setProjectionMap(java.util.Map)
.
Returns | |
---|---|
Map<String, String> |
This value may be null . |
getTables
public String getTables ()
Returns the list of tables being queried
Returns | |
---|---|
String |
the list of tables being queried
This value may be null . |
insert
public long insert (SQLiteDatabase db, ContentValues values)
Perform an insert by combining all current settings and the information passed into this method.
Parameters | |
---|---|
db |
SQLiteDatabase : the database to insert on
This value cannot be null . |
values |
ContentValues : This value cannot be null . |
Returns | |
---|---|
long |
the row ID of the newly inserted row, or -1 if an error occurred |
isDistinct
public boolean isDistinct ()
Get if the query is marked as DISTINCT
, as last configured by
setDistinct(boolean)
.
Returns | |
---|---|
boolean |
isStrict
public boolean isStrict ()
Get if the query is marked as strict, as last configured by
setStrict(boolean)
.
Returns | |
---|---|
boolean |
isStrictColumns
public boolean isStrictColumns ()
Get if the query is marked as strict, as last configured by
setStrictColumns(boolean)
.
Returns | |
---|---|
boolean |
isStrictGrammar
public boolean isStrictGrammar ()
Get if the query is marked as strict, as last configured by
setStrictGrammar(boolean)
.
Returns | |
---|---|
boolean |
query
public Cursor query (SQLiteDatabase db, String[] projectionIn, String selection, String[] selectionArgs, String groupBy, String having, String sortOrder)
Perform a query by combining all current settings and the information passed into this method.
Parameters | |
---|---|
db |
SQLiteDatabase : the database to query on |
projectionIn |
String : A list of which columns to return. Passing
null will return all columns, which is discouraged to prevent
reading data from storage that isn't going to be used. |
selection |
String : A filter declaring which rows to return,
formatted as an SQL WHERE clause (excluding the WHERE
itself). Passing null will return all rows for the given URL. |
selectionArgs |
String : You may include ?s in selection, which
will be replaced by the values from selectionArgs, in order
that they appear in the selection. The values will be bound
as Strings. |
groupBy |
String : A filter declaring how to group rows, formatted
as an SQL GROUP BY clause (excluding the GROUP BY
itself). Passing null will cause the rows to not be grouped. |
having |
String : A filter declare which row groups to include in
the cursor, if row grouping is being used, formatted as an
SQL HAVING clause (excluding the HAVING itself). Passing
null will cause all row groups to be included, and is
required when row grouping is not being used. |
sortOrder |
String : How to order the rows, formatted as an SQL
ORDER BY clause (excluding the ORDER BY itself). Passing null
will use the default sort order, which may be unordered. |
Returns | |
---|---|
Cursor |
a cursor over the result set |
query
public Cursor query (SQLiteDatabase db, String[] projectionIn, String selection, String[] selectionArgs, String groupBy, String having, String sortOrder, String limit)
Perform a query by combining all current settings and the information passed into this method.
Parameters | |
---|---|
db |
SQLiteDatabase : the database to query on |
projectionIn |
String : A list of which columns to return. Passing
null will return all columns, which is discouraged to prevent
reading data from storage that isn't going to be used. |
selection |
String : A filter declaring which rows to return,
formatted as an SQL WHERE clause (excluding the WHERE
itself). Passing null will return all rows for the given URL. |
selectionArgs |
String : You may include ?s in selection, which
will be replaced by the values from selectionArgs, in order
that they appear in the selection. The values will be bound
as Strings. |
groupBy |
String : A filter declaring how to group rows, formatted
as an SQL GROUP BY clause (excluding the GROUP BY
itself). Passing null will cause the rows to not be grouped. |
having |
String : A filter declare which row groups to include in
the cursor, if row grouping is being used, formatted as an
SQL HAVING clause (excluding the HAVING itself). Passing
null will cause all row groups to be included, and is
required when row grouping is not being used. |
sortOrder |
String : How to order the rows, formatted as an SQL
ORDER BY clause (excluding the ORDER BY itself). Passing null
will use the default sort order, which may be unordered. |
limit |
String : Limits the number of rows returned by the query,
formatted as LIMIT clause. Passing null denotes no LIMIT clause. |
Returns | |
---|---|
Cursor |
a cursor over the result set |
query
public Cursor query (SQLiteDatabase db, String[] projectionIn, String selection, String[] selectionArgs, String groupBy, String having, String sortOrder, String limit, CancellationSignal cancellationSignal)
Perform a query by combining all current settings and the information passed into this method.
Parameters | |
---|---|
db |
SQLiteDatabase : the database to query on |
projectionIn |
String : A list of which columns to return. Passing
null will return all columns, which is discouraged to prevent
reading data from storage that isn't going to be used. |
selection |
String : A filter declaring which rows to return,
formatted as an SQL WHERE clause (excluding the WHERE
itself). Passing null will return all rows for the given URL. |
selectionArgs |
String : You may include ?s in selection, which
will be replaced by the values from selectionArgs, in order
that they appear in the selection. The values will be bound
as Strings. |
groupBy |
String : A filter declaring how to group rows, formatted
as an SQL GROUP BY clause (excluding the GROUP BY
itself). Passing null will cause the rows to not be grouped. |
having |
String : A filter declare which row groups to include in
the cursor, if row grouping is being used, formatted as an
SQL HAVING clause (excluding the HAVING itself). Passing
null will cause all row groups to be included, and is
required when row grouping is not being used. |
sortOrder |
String : How to order the rows, formatted as an SQL
ORDER BY clause (excluding the ORDER BY itself). Passing null
will use the default sort order, which may be unordered. |
limit |
String : Limits the number of rows returned by the query,
formatted as LIMIT clause. Passing null denotes no LIMIT clause. |
cancellationSignal |
CancellationSignal : A signal to cancel the operation in progress, or null if none.
If the operation is canceled, then OperationCanceledException will be thrown
when the query is executed. |
Returns | |
---|---|
Cursor |
a cursor over the result set |
setCursorFactory
public void setCursorFactory (SQLiteDatabase.CursorFactory factory)
Sets the cursor factory to be used for the query. You can use one factory for all queries on a database but it is normally easier to specify the factory when doing this query.
Parameters | |
---|---|
factory |
SQLiteDatabase.CursorFactory : the factory to use.
This value may be null . |
setDistinct
public void setDistinct (boolean distinct)
Mark the query as DISTINCT
.
Parameters | |
---|---|
distinct |
boolean : if true the query is DISTINCT , otherwise it isn't |
setProjectionGreylist
public void setProjectionGreylist (Collection<Pattern> projectionGreylist)
Sets a projection greylist of columns that will be allowed through, even
when setStrict(boolean)
is enabled. This provides a way for
abusive custom columns like COUNT(*)
to continue working.
Parameters | |
---|---|
projectionGreylist |
Collection : This value may be null . |
setProjectionMap
public void setProjectionMap (Map<String, String> columnMap)
Sets the projection map for the query. The projection map maps from column names that the caller passes into query to database column names. This is useful for renaming columns as well as disambiguating column names when doing joins. For example you could map "name" to "people.name". If a projection map is set it must contain all column names the user may request, even if the key and value are the same.
Parameters | |
---|---|
columnMap |
Map : maps from the user column names to the database column names
This value may be null . |
setStrict
public void setStrict (boolean strict)
When set, the selection is verified against malicious arguments. When
using this class to create a statement using
buildQueryString(boolean, java.lang.String, java.lang.String[], java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String)
,
non-numeric limits will raise an exception. If a projection map is
specified, fields not in that map will be ignored. If this class is used
to execute the statement directly using
query(android.database.sqlite.SQLiteDatabase, java.lang.String[], java.lang.String, java.lang.String[], java.lang.String, java.lang.String, java.lang.String)
or
query(android.database.sqlite.SQLiteDatabase, java.lang.String[], java.lang.String, java.lang.String[], java.lang.String, java.lang.String, java.lang.String, java.lang.String)
,
additionally also parenthesis escaping selection are caught. To
summarize: To get maximum protection against malicious third party apps
(for example content provider consumers), make sure to do the following:
- Set this value to true
- Use a projection map
- Use one of the query overloads instead of getting the statement as a sql string
This feature is disabled by default on each newly constructed
SQLiteQueryBuilder
and needs to be manually enabled.
Parameters | |
---|---|
strict |
boolean |
setStrictColumns
public void setStrictColumns (boolean strictColumns)
When enabled, verify that all projections and ContentValues
only
contain valid columns as defined by setProjectionMap(java.util.Map)
.
This enforcement applies to insert(SQLiteDatabase, ContentValues)
, query(SQLiteDatabase, String, String, String, String, String, String)
, and
update(SQLiteDatabase, ContentValues, String, String)
operations. Any enforcement failures will throw an
IllegalArgumentException
.
This feature is disabled by default on each newly constructed
SQLiteQueryBuilder
and needs to be manually enabled.
Parameters | |
---|---|
strictColumns |
boolean |
setStrictGrammar
public void setStrictGrammar (boolean strictGrammar)
When enabled, verify that all untrusted SQL conforms to a restricted SQL grammar. Here are the restrictions applied:
- In
WHERE
andHAVING
clauses: subqueries, raising, and windowing terms are rejected. - In
GROUP BY
clauses: only valid columns are allowed. - In
ORDER BY
clauses: only valid columns, collation, and ordering terms are allowed. - In
LIMIT
clauses: only numerical values and offset terms are allowed.
setProjectionMap(java.util.Map)
.
This enforcement applies to query(SQLiteDatabase, String, String, String, String, String, String)
, update(SQLiteDatabase, ContentValues, String, String)
and
delete(SQLiteDatabase, String, String)
operations. This enforcement does not apply to trusted
inputs, such as those provided by appendWhere(CharSequence)
. Any enforcement
failures will throw an IllegalArgumentException
.
This feature is disabled by default on each newly constructed
SQLiteQueryBuilder
and needs to be manually enabled.
Parameters | |
---|---|
strictGrammar |
boolean |
setTables
public void setTables (String inTables)
Sets the list of tables to query. Multiple tables can be specified to perform a join. For example: setTables("foo, bar") setTables("foo LEFT OUTER JOIN bar ON (foo.id = bar.foo_id)")
Parameters | |
---|---|
inTables |
String : the list of tables to query on
This value may be null . |
update
public int update (SQLiteDatabase db, ContentValues values, String selection, String[] selectionArgs)
Perform an update by combining all current settings and the information passed into this method.
Parameters | |
---|---|
db |
SQLiteDatabase : the database to update on
This value cannot be null . |
values |
ContentValues : This value cannot be null . |
selection |
String : A filter declaring which rows to return,
formatted as an SQL WHERE clause (excluding the WHERE
itself). Passing null will return all rows for the given URL. |
selectionArgs |
String : You may include ?s in selection, which
will be replaced by the values from selectionArgs, in order
that they appear in the selection. The values will be bound
as Strings.
This value may be null . |
Returns | |
---|---|
int |
the number of rows updated |