我目前正在使用sqlite数据库，android。我想将包含sql语句的原始文件导入到我的数据库中。我的方案如下。
;符号拆分那些sql语句但是当我执行sql语句时，它只会在执行文件的一行后抛出(21) API called with NULL prepared statement和(21) misuse at line 70084 of [b3bb660af9]等错误。我的编码没有任何问题。
错误日志
03-08 14:56:41.652 15867-15867/com.sv.gauge D/EXECUTED SQL: PRAGMA foreign_keys=OFF
03-08 14:56:41.662 15867-15867/com.sv.gauge E/SQLiteLog: (21) API called with NULL prepared statement
03-08 14:56:41.662 15867-15867/com.sv.gauge E/SQLiteLog: (21) misuse at line 70084 of [b3bb660af9]
03-08 14:56:41.672 15867-15867/com.sv.gauge D/AndroidRuntime: Shutting down VM
03-08 14:56:41.672 15867-15867/com.sv.gauge E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.sv.gauge, PID: 15867
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sv.gauge/com.sv.gauge.LoginActivity}: android.database.sqlite.SQLiteException: not an error (code 0)
#################################################################
Error Code : 0 (SQLITE_OK)
Caused By : not an error (code 0)
#################################################################
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2695)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2769)
at android.app.ActivityThread.access$900(ActivityThread.java:177)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1430)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5910)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200)
Caused by: android.database.sqlite.SQLiteException: not an error (code 0)
#################################################################
Error Code : 0 (SQLITE_OK)
Caused By : not an error (code 0)
#################################################################
at android.database.sqlite.SQLiteConnection.nativeExecuteForChangedRowCount(Native Method)
at android.database.sqlite.SQLiteConnection.executeForChangedRowCount(SQLiteConnection.java:904)
at android.database.sqlite.SQLiteSession.executeForChangedRowCount(SQLiteSession.java:754)
at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:64)
at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1814)
at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1743)
at com.sv.gauge.controller.GaugeDatabaseHelper.onCreate(GaugeDatabaseHelper.java:78)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:251)
at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:187)
at com.sv.gauge.controller.GaugeDatabaseHelper.getReadableDatabase(GaugeDatabaseHelper.java:43)
at com.sv.gauge.controller.GaugeDatabaseHelper.<init>(GaugeDatabaseHelper.java:37)
at com.sv.gauge.LoginActivity.onCreate(LoginActivity.java:39)
at android.app.Activity.performCreate(Activity.java:6178)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2648)
... 10 more
用于导入原始sql文件的代码段
@Override
public void onCreate(SQLiteDatabase db) {
InputStream inputStream = context.getResources().openRawResource(R.raw.database);
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
StringBuilder builder = new StringBuilder();
try {
while ((line = reader.readLine()) != null) {
builder.append(line);
builder.append(System.getProperty("line.separator"));
}
String rawSql = builder.toString();
String[] sqls = rawSql.split(";");
for (String sql : sqls) {
db.execSQL(sql);
Log.d("EXECUTED SQL", sql);
}
} catch (IOException e) {
e.printStackTrace();
}
}
包含sql语句的原始文件
PRAGMA foreign_keys=OFF;
BEGIN TRANSACTION;
CREATE TABLE "domain" (
`id` INTEGER PRIMARY KEY AUTOINCREMENT,
`title` TEXT NOT NULL,
`description` TEXT NOT NULL,
`first_step` INTEGER NOT NULL
);
INSERT INTO "domain" VALUES(1,'GENERATOR ROOM','take measurements of generator room',1);
CREATE TABLE "domain_step" (
`id` INTEGER PRIMARY KEY AUTOINCREMENT,
`domain_id` INTEGER NOT NULL,
`title` TEXT NOT NULL,
`visual_type` TEXT NOT NULL,
`visual_link` TEXT,
`visual_description` TEXT NOT NULL,
`next_step` INTEGER,
`show_map` INTEGER NOT NULL,
`last_step` INTEGER NOT NULL,
`map_from_previous_link` TEXT,
`enable_skip` INTEGER NOT NULL,
`skip_to_step` INTEGER,
`map_from_beginning_link` TEXT,
`value_type` TEXT NOT NULL,
`value_hint` TEXT,
`default_value` TEXT,
`default_from_value` TEXT,
`default_to_value` TEXT,
`report_description` TEXT
);
INSERT INTO "domain_step" VALUES(1,1,'Safty Items','IMAGE',NULL,'Did you ware safety Items?
1) Ear protection
2) Helmet with light',2,0,0,NULL,0,NULL,NULL,'NONE',NULL,NULL,NULL,NULL,NULL);
COMMIT;
如果sql文件已经有“;”然后
try {
while ((line = reader.readLine()) != null) {
builder.append(line);
builder.append(System.getProperty("line.separator"));
}
应该
try {
while ((line = reader.readLine()) != null) {
builder.append(line);
}
其他访客的另一种选择
我得到了这一行，因为我的SQL脚本中有一个以;字符结尾的注释。因此，它试图单独执行注释，从而产生“NULL prepared statement”错误。
-- version 1 of the database vocab table was
--
-- CREATE TABLE vocab
-- ( _id INTEGER PRIMARY KEY,
-- date INTEGER,
-- list_id TEXT NOT NULL, -- this should have been INTEGER
-- mongol TEXT NOT NULL,
-- definition TEXT,
-- pronunciation TEXT,
-- audio TEXT,
-- FOREIGN KEY(list_id) REFERENCES lists(_id)
-- );
PRAGMA foreign_keys=off;
BEGIN TRANSACTION;
ALTER TABLE vocab RENAME TO _vocab_old;
...
解决方案
您可以通过执行以下任一操作来解决此问题：
;结尾的注释行;之后添加额外的文本。我这样做了：
-- version 1 of the database vocab table was
--
-- CREATE TABLE vocab
-- ( _id INTEGER PRIMARY KEY,
-- date INTEGER,
-- list_id TEXT NOT NULL, -- this should have been INTEGER
-- mongol TEXT NOT NULL,
-- definition TEXT,
-- pronunciation TEXT,
-- audio TEXT,
-- FOREIGN KEY(list_id) REFERENCES lists(_id)
-- ); -- end comment (comment lines cannot end with semicolon)
--开头并且不尝试运行它们的任何行。结论
如果您收到此错误，请查找可能单独执行的迷路;字符。