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# prestogres jdbc | |
require "java" | |
java_import java.util.Properties | |
require "./postgresql-9.4-1203.jdbc41.jar" | |
Java::org.postgresql.Driver | |
db_url = "jdbc:postgresql://localhost:5439/hive" | |
props = Properties.new | |
props.set_property "protocolVersion", "2" | |
props.set_property "user","presto" | |
props.set_property "password","" | |
#props.set_property "ssl","true" | |
#props.set_property "loglevel", "1" | |
def print_row rs | |
puts "%20s%60s%20s%20s" % [rs.get_object("code"), rs.get_object("description"), | |
rs.get_object("total_emp"), rs.get_object("salary")] | |
end | |
conn = java.sql.DriverManager.get_connection db_url, props | |
stmt = conn.create_statement | |
query = "SELECT code, description, total_emp, salary FROM sample_07 limit 20" | |
puts query, "%20s%60s%20s%20s" % ["CODE", "DESCRIPTION", "TOTAL_EMP" , "SALARY"] | |
rs = stmt.execute_query query | |
while rs.next do | |
print_row rs | |
end | |
prep_query = "SELECT code, description, total_emp, salary FROM sample_07 where salary > ? order by salary desc limit 20" | |
prep = conn.prepare_statement prep_query | |
prep.set_int 1, 100000 | |
puts prep_query, "%20s%60s%20s%20s" % ["CODE", "DESCRIPTION", "TOTAL_EMP" , "SALARY"] | |
rs = prep.execute_query | |
while rs.next do | |
print_row rs | |
end |
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