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make the fulltext index for search more space-efficient

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It now uses the data from the messages table instead of having a copy of each
message.

The message UUIDs are no longer part of the index.
This commit is contained in:
Alexei Sorokin 2021-05-28 10:38:28 +03:00 committed by Daniel Gultsch
parent ea0dc558cb
commit 4f362aafac
1 changed files with 2 additions and 2 deletions
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4
src/main/java/eu/siacs/conversations/persistance/DatabaseBackend.java
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@ -170,10 +170,10 @@ public class DatabaseBackend extends SQLiteOpenHelper {
private static final String CREATE_MESSAGE_RELATIVE_FILE_PATH_INDEX = "CREATE INDEX message_file_path_index ON " + Message.TABLENAME + "(" + Message.RELATIVE_FILE_PATH + ")";
private static final String CREATE_MESSAGE_TYPE_INDEX = "CREATE INDEX message_type_index ON " + Message.TABLENAME + "(" + Message.TYPE + ")";
private static final String CREATE_MESSAGE_INDEX_TABLE = "CREATE VIRTUAL TABLE messages_index USING fts4 (uuid TEXT PRIMARY KEY, body TEXT, tokenize = 'unicode61')";
private static final String CREATE_MESSAGE_INDEX_TABLE = "CREATE VIRTUAL TABLE messages_index USING fts4 (uuid,body,notindexed=\"uuid\",content=\"" + Message.TABLENAME + "\",tokenize='unicode61')";
private static final String CREATE_MESSAGE_INSERT_TRIGGER = "CREATE TRIGGER after_message_insert AFTER INSERT ON " + Message.TABLENAME + " BEGIN INSERT INTO messages_index (uuid,body) VALUES (new.uuid,new.body); END;";
private static final String CREATE_MESSAGE_UPDATE_TRIGGER = "CREATE TRIGGER after_message_update UPDATE of uuid,body ON " + Message.TABLENAME + " BEGIN update messages_index set body=new.body,uuid=new.uuid WHERE uuid=old.uuid; END;";
private static final String COPY_PREEXISTING_ENTRIES = "INSERT INTO messages_index(uuid,body) SELECT uuid,body FROM " + Message.TABLENAME + ";";
private static final String COPY_PREEXISTING_ENTRIES = "INSERT INTO messages_index(messages_index) VALUES('rebuild');";
private DatabaseBackend(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);