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# <author>Pieter Muller</author> | |
# <date>2012-11-14</date> | |
import sys | |
import sqlite3 as sqlite | |
tablesToIgnore = ["sqlite_sequence"] | |
outputFilename = None | |
def Print(msg): | |
if (outputFilename != None): | |
outputFile = open(outputFilename,'a') | |
print >> outputFile, msg | |
outputFile.close() | |
else: | |
print msg | |
def Describe(dbFile): | |
connection = sqlite.connect(dbFile) | |
cursor = connection.cursor() | |
Print("TableName\tColumns\tRows\tCells") | |
totalTables = 0 | |
totalColumns = 0 | |
totalRows = 0 | |
totalCells = 0 | |
# Get List of Tables: | |
tableListQuery = "SELECT name FROM sqlite_master WHERE type='table' ORDER BY Name" | |
cursor.execute(tableListQuery) | |
tables = map(lambda t: t[0], cursor.fetchall()) | |
for table in tables: | |
if (table in tablesToIgnore): | |
continue | |
columnsQuery = "PRAGMA table_info(%s)" % table | |
cursor.execute(columnsQuery) | |
numberOfColumns = len(cursor.fetchall()) | |
rowsQuery = "SELECT Count() FROM %s" % table | |
cursor.execute(rowsQuery) | |
numberOfRows = cursor.fetchone()[0] | |
numberOfCells = numberOfColumns*numberOfRows | |
Print("%s\t%d\t%d\t%d" % (table, numberOfColumns, numberOfRows, numberOfCells)) | |
totalTables += 1 | |
totalColumns += numberOfColumns | |
totalRows += numberOfRows | |
totalCells += numberOfCells | |
Print( "" ) | |
Print( "Number of Tables:\t%d" % totalTables ) | |
Print( "Total Number of Columns:\t%d" % totalColumns ) | |
Print( "Total Number of Rows:\t%d" % totalRows ) | |
Print( "Total Number of Cells:\t%d" % totalCells ) | |
cursor.close() | |
connection.close() | |
if __name__ == "__main__": | |
if (len(sys.argv) == 2): | |
dbFile = sys.argv[1] | |
Describe(dbFile) | |
elif (len(sys.argv) == 3): | |
dbFile = sys.argv[1] | |
outputFilename = sys.argv[2] | |
Describe(dbFile) | |
else: | |
print "\n\tUsage:" | |
print "\n\t\tDBDescribe.py {dbFile}" | |
print "\t\t\tPrints summary of {dbFile} to standard output." | |
print "\n\t\tDBDescribe.py {dbFile} {outputFile}" | |
print "\t\t\tAppends summary of {dbFile} to {outputFile}." | |
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