| 1 |
1942
|
aaronmk
|
#!/usr/bin/env python
|
| 2 |
|
|
# Loads a command's CSV output stream into a PostgreSQL table.
|
| 3 |
|
|
# The command may be run more than once.
|
| 4 |
|
|
|
| 5 |
|
|
import csv
|
| 6 |
|
|
import os.path
|
| 7 |
1963
|
aaronmk
|
import re
|
| 8 |
1942
|
aaronmk
|
import subprocess
|
| 9 |
|
|
import sys
|
| 10 |
|
|
|
| 11 |
|
|
sys.path.append(os.path.dirname(__file__)+"/../lib")
|
| 12 |
|
|
|
| 13 |
|
|
import csvs
|
| 14 |
|
|
import exc
|
| 15 |
|
|
import opts
|
| 16 |
|
|
import sql
|
| 17 |
3080
|
aaronmk
|
import sql_io
|
| 18 |
2680
|
aaronmk
|
import sql_gen
|
| 19 |
1942
|
aaronmk
|
import streams
|
| 20 |
1963
|
aaronmk
|
import strings
|
| 21 |
1965
|
aaronmk
|
import util
|
| 22 |
1942
|
aaronmk
|
|
| 23 |
|
|
def main():
|
| 24 |
|
|
# Usage
|
| 25 |
|
|
env_names = []
|
| 26 |
|
|
def usage_err():
|
| 27 |
|
|
raise SystemExit('Usage: '+opts.env_usage(env_names)+' '+sys.argv[0]
|
| 28 |
|
|
+' input_cmd [args...]')
|
| 29 |
|
|
|
| 30 |
|
|
# Parse args
|
| 31 |
|
|
input_cmd = sys.argv[1:]
|
| 32 |
|
|
|
| 33 |
|
|
# Get config from env vars
|
| 34 |
|
|
table = opts.get_env_var('table', None, env_names)
|
| 35 |
|
|
schema = opts.get_env_var('schema', 'public', env_names)
|
| 36 |
4257
|
aaronmk
|
has_row_num = opts.env_flag('has_row_num', True, env_names)
|
| 37 |
1942
|
aaronmk
|
db_config = opts.get_env_vars(sql.db_config_names, None, env_names)
|
| 38 |
2890
|
aaronmk
|
errors_table_only = opts.env_flag('errors_table_only', False, env_names)
|
| 39 |
3271
|
aaronmk
|
verbosity = util.cast(float, opts.get_env_var('verbosity', 3, env_names))
|
| 40 |
1942
|
aaronmk
|
|
| 41 |
2890
|
aaronmk
|
if not (input_cmd != [] and table != None and 'engine' in db_config):
|
| 42 |
|
|
usage_err()
|
| 43 |
|
|
|
| 44 |
1942
|
aaronmk
|
# Connect to DB
|
| 45 |
2680
|
aaronmk
|
def log(msg, level=1):
|
| 46 |
|
|
'''Higher level -> more verbose'''
|
| 47 |
3610
|
aaronmk
|
if level <= verbosity:
|
| 48 |
|
|
sys.stderr.write(strings.to_raw_str(msg.rstrip('\n')+'\n'))
|
| 49 |
2680
|
aaronmk
|
db = sql.connect(db_config, log_debug=log)
|
| 50 |
1942
|
aaronmk
|
|
| 51 |
3138
|
aaronmk
|
table = sql_gen.Table(table, schema)
|
| 52 |
|
|
|
| 53 |
3134
|
aaronmk
|
log('Creating errors table')
|
| 54 |
|
|
errors_table = sql_io.errors_table(db, table, if_exists=False)
|
| 55 |
3440
|
aaronmk
|
if errors_table_only: sql.drop_table(db, errors_table)
|
| 56 |
3134
|
aaronmk
|
typed_cols = [
|
| 57 |
|
|
sql_gen.TypedCol('column', 'text', nullable=False),
|
| 58 |
|
|
sql_gen.TypedCol('value', 'text'),
|
| 59 |
|
|
sql_gen.TypedCol('error_code', 'character varying(5)',
|
| 60 |
|
|
nullable=False),
|
| 61 |
|
|
sql_gen.TypedCol('error', 'text', nullable=False),
|
| 62 |
|
|
]
|
| 63 |
|
|
sql.create_table(db, errors_table, typed_cols, has_pkey=False)
|
| 64 |
|
|
index_cols = ['column', 'value', 'error_code', 'error']
|
| 65 |
|
|
sql.add_index(db, index_cols, errors_table, unique=True)
|
| 66 |
2890
|
aaronmk
|
|
| 67 |
1963
|
aaronmk
|
use_copy_from = [True]
|
| 68 |
|
|
|
| 69 |
|
|
# Loads data into the table using the currently-selected approach.
|
| 70 |
2680
|
aaronmk
|
def load():
|
| 71 |
1942
|
aaronmk
|
# Open input stream
|
| 72 |
|
|
proc = subprocess.Popen(input_cmd, stdout=subprocess.PIPE, bufsize=-1)
|
| 73 |
|
|
in_ = proc.stdout
|
| 74 |
|
|
|
| 75 |
|
|
# Get format info
|
| 76 |
|
|
info = csvs.stream_info(in_, parse_header=True)
|
| 77 |
|
|
dialect = info.dialect
|
| 78 |
1963
|
aaronmk
|
if csvs.is_tsv(dialect): use_copy_from[0] = False
|
| 79 |
3609
|
aaronmk
|
col_names = map(strings.to_unicode, info.header)
|
| 80 |
2680
|
aaronmk
|
for i, col in enumerate(col_names): # replace empty column names
|
| 81 |
|
|
if col == '': col_names[i] = 'column_'+str(i)
|
| 82 |
1942
|
aaronmk
|
|
| 83 |
1963
|
aaronmk
|
# Select schema and escape names
|
| 84 |
3608
|
aaronmk
|
def esc_name(name): return db.esc_name(name)
|
| 85 |
1942
|
aaronmk
|
|
| 86 |
4257
|
aaronmk
|
typed_cols = [sql_gen.TypedCol(v, 'text') for v in col_names]
|
| 87 |
|
|
if has_row_num:
|
| 88 |
|
|
typed_cols.insert(0, sql_gen.TypedCol('row_num', 'serial',
|
| 89 |
|
|
nullable=False))
|
| 90 |
2759
|
aaronmk
|
|
| 91 |
3149
|
aaronmk
|
log('Creating table')
|
| 92 |
4257
|
aaronmk
|
sql.create_table(db, table, typed_cols, has_pkey=has_row_num,
|
| 93 |
|
|
col_indexes=False)
|
| 94 |
3149
|
aaronmk
|
|
| 95 |
|
|
# Remove rows from any failed COPY FROM
|
| 96 |
|
|
sql.truncate(db, table)
|
| 97 |
|
|
|
| 98 |
2680
|
aaronmk
|
def load_():
|
| 99 |
|
|
# Create COPY FROM statement
|
| 100 |
|
|
if use_copy_from[0]:
|
| 101 |
3139
|
aaronmk
|
copy_from = ('COPY '+table.to_str(db)+' ('
|
| 102 |
2680
|
aaronmk
|
+(', '.join(map(esc_name, col_names)))
|
| 103 |
3578
|
aaronmk
|
+') FROM STDIN DELIMITER '+db.esc_value(dialect.delimiter)
|
| 104 |
|
|
+' NULL '+db.esc_value(''))
|
| 105 |
2680
|
aaronmk
|
assert not csvs.is_tsv(dialect)
|
| 106 |
|
|
copy_from += ' CSV'
|
| 107 |
|
|
if dialect.quoting != csv.QUOTE_NONE:
|
| 108 |
3578
|
aaronmk
|
quote_str = db.esc_value(dialect.quotechar)
|
| 109 |
|
|
copy_from += ' QUOTE '+quote_str
|
| 110 |
|
|
if dialect.doublequote: copy_from += ' ESCAPE '+quote_str
|
| 111 |
2680
|
aaronmk
|
copy_from += ';\n'
|
| 112 |
|
|
|
| 113 |
|
|
# Load the data
|
| 114 |
2892
|
aaronmk
|
line_in = streams.ProgressInputStream(in_, sys.stderr, n=1000)
|
| 115 |
2680
|
aaronmk
|
try:
|
| 116 |
|
|
if use_copy_from[0]:
|
| 117 |
|
|
log('Using COPY FROM')
|
| 118 |
|
|
log(copy_from, level=2)
|
| 119 |
|
|
db.db.cursor().copy_expert(copy_from, line_in)
|
| 120 |
|
|
else:
|
| 121 |
|
|
log('Using INSERT')
|
| 122 |
|
|
cols_ct = len(col_names)+1 # +1 for row_num
|
| 123 |
|
|
for row in csvs.make_reader(line_in, dialect):
|
| 124 |
|
|
row = map(strings.to_unicode, row)
|
| 125 |
|
|
row.insert(0, sql.default) # row_num is autogen
|
| 126 |
|
|
util.list_set_length(row, cols_ct) # truncate extra cols
|
| 127 |
3270
|
aaronmk
|
sql.insert(db, table, row, cacheable=False, log_level=5)
|
| 128 |
2680
|
aaronmk
|
finally:
|
| 129 |
|
|
line_in.close() # also closes proc.stdout
|
| 130 |
|
|
proc.wait()
|
| 131 |
|
|
sql.with_savepoint(db, load_)
|
| 132 |
1963
|
aaronmk
|
|
| 133 |
2680
|
aaronmk
|
log('Cleaning up table')
|
| 134 |
3081
|
aaronmk
|
sql_io.cleanup_table(db, table, col_names)
|
| 135 |
1942
|
aaronmk
|
|
| 136 |
3147
|
aaronmk
|
log('Vacuuming and reanalyzing table')
|
| 137 |
|
|
sql.vacuum(db, table)
|
| 138 |
1942
|
aaronmk
|
|
| 139 |
3134
|
aaronmk
|
if not errors_table_only:
|
| 140 |
2890
|
aaronmk
|
try: load()
|
| 141 |
|
|
except sql.DatabaseErrors, e:
|
| 142 |
|
|
if use_copy_from[0]: # first try
|
| 143 |
|
|
exc.print_ex(e, plain=True)
|
| 144 |
|
|
use_copy_from[0] = False
|
| 145 |
|
|
load() # try again with different approach
|
| 146 |
|
|
else: raise
|
| 147 |
1942
|
aaronmk
|
|
| 148 |
|
|
main()
|
