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Supporting illegal BigQuery characters in table and field names #18

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Supporting illegal BigQuery characters in table and field names #18

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13 changes: 10 additions & 3 deletions target_bigquery.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
import http.client
import urllib
import pkg_resources
import re

from jsonschema import validate
import singer
Expand Down Expand Up @@ -51,8 +52,11 @@ def emit_state(state):
def clear_dict_hook(items):
return {k: v if v is not None else '' for k, v in items}

def fix_name(name):
return re.sub('[^a-zA-Z0-9_]', '_', name)

def define_schema(field, name):
schema_name = name
schema_name = fix_name(name)
schema_type = "STRING"
schema_mode = "NULLABLE"
schema_description = None
Expand Down Expand Up @@ -139,7 +143,10 @@ def persist_lines_job(project_id, dataset_id, lines=None, truncate=False, valida
validate(msg.record, schema)

# NEWLINE_DELIMITED_JSON expects literal JSON formatted data, with a newline character splitting each row.
dat = bytes(json.dumps(msg.record) + '\n', 'UTF-8')
new_record = {}
for key, value in msg.record.items():
new_record[fix_name(key)] = value
dat = bytes(json.dumps(new_record) + '\n', 'UTF-8')

rows[msg.stream].write(dat)
#rows[msg.stream].write(bytes(str(msg.record) + '\n', 'UTF-8'))
Expand Down Expand Up @@ -170,7 +177,7 @@ def persist_lines_job(project_id, dataset_id, lines=None, truncate=False, valida
raise Exception("Unrecognized message {}".format(msg))

for table in rows.keys():
table_ref = bigquery_client.dataset(dataset_id).table(table)
table_ref = bigquery_client.dataset(dataset_id).table(fix_name(table))
SCHEMA = build_schema(schemas[table])
load_config = LoadJobConfig()
load_config.schema = SCHEMA
Expand Down