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Port script: clean up a bit 

Improve logging and comments. Group all the stuff to do with inspecting tables
together rather than creating the port tables in the middle.
This commit is contained in:
Richard van der Hoff 2018-04-06 13:47:11 +01:00
parent e01ba5bda3
commit 01579384cc
1 changed files with 29 additions and 25 deletions
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54
scripts/synapse_port_db
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@ -251,6 +251,12 @@ class Porter(object):
@defer.inlineCallbacks
def handle_table(self, table, postgres_size, table_size, forward_chunk,
backward_chunk):
logger.info(
"Table %s: %i/%i (rows %i-%i) already ported",
table, postgres_size, table_size,
backward_chunk+1, forward_chunk-1,
)
if not table_size:
return
@ -468,28 +474,7 @@ class Porter(object):
self.progress.set_state("Preparing PostgreSQL")
self.setup_db(postgres_config, postgres_engine)
# Step 2. Get tables.
self.progress.set_state("Fetching tables")
sqlite_tables = yield self.sqlite_store._simple_select_onecol(
table="sqlite_master",
keyvalues={
"type": "table",
},
retcol="name",
)
postgres_tables = yield self.postgres_store._simple_select_onecol(
table="information_schema.tables",
keyvalues={},
retcol="distinct table_name",
)
tables = set(sqlite_tables) & set(postgres_tables)
self.progress.set_state("Creating tables")
logger.info("Found %d tables", len(tables))
self.progress.set_state("Creating port tables")
def create_port_table(txn):
txn.execute(
"CREATE TABLE IF NOT EXISTS port_from_sqlite3 ("
@ -524,9 +509,27 @@ class Porter(object):
"create_port_table", create_port_table
)
self.progress.set_state("Setting up")
# Step 2. Get tables.
self.progress.set_state("Fetching tables")
sqlite_tables = yield self.sqlite_store._simple_select_onecol(
table="sqlite_master",
keyvalues={
"type": "table",
},
retcol="name",
)
# Set up tables.
postgres_tables = yield self.postgres_store._simple_select_onecol(
table="information_schema.tables",
keyvalues={},
retcol="distinct table_name",
)
tables = set(sqlite_tables) & set(postgres_tables)
logger.info("Found %d tables", len(tables))
# Step 3. Figure out what still needs copying
self.progress.set_state("Checking on port progress")
setup_res = yield defer.gatherResults(
[
self.setup_table(table)
@ -537,7 +540,8 @@ class Porter(object):
consumeErrors=True,
)
# Process tables.
# Step 4. Do the copying.
self.progress.set_state("Copying to postgres")
yield defer.gatherResults(
[
self.handle_table(*res)