jerryleooo created CALCITE-3778:
-----------------------------------
Summary: Provide ways to view the physical SQLs sent to database
Key: CALCITE-3778
URL: https://issues.apache.org/jira/browse/CALCITE-3778
Project: Calcite
Issue Type: Wish
Components: core
Reporter: jerryleooo
I am using Calcite JDBC, when executing a multiple join, I want to check if the
queries/SQLs sent to databases are right. Currently seems there is no easy way
to do this.
I have enabled 'calcite.debug=true' but it just gave me some Java code.
{code:java}
val connection = DriverManager.getConnection("jdbc:calcite:")
val calciteConnection = connection.asInstanceOf[CalciteConnection]
val rootSchema = calciteConnection.getRootSchema()
val dsInsightUser =
JdbcSchema.dataSource("jdbc:mysql://localhost:13306/insight?useSSL=false&serverTimezone=UTC",
"com.mysql.jdbc.Driver", "insight_admin","xxxxxx")
val dsPerm =
JdbcSchema.dataSource("jdbc:mysql://localhost:13307/permission?useSSL=false&serverTimezone=UTC",
"com.mysql.jdbc.Driver", "perm_admin", "xxxxxx")
rootSchema.add("insight_user", JdbcSchema.create(rootSchema, "insight_user",
dsInsightUser, null, null))
rootSchema.add("perm", JdbcSchema.create(rootSchema, "perm", dsPerm, null,
null)) val stmt = connection.createStatement()
val rs = stmt.executeQuery("""explain plan for select "perm"."user_table".*
from "perm"."user_table" join "insight_user"."user_tab" on
"perm"."user_table"."id"="insight_user"."user_tab"."id" """)
val metaData = rs.getMetaData()
while(rs.next()) {
for(i <- 1 to metaData.getColumnCount) printf("%s ", rs.getObject(i))
println()
}
{code}
Tried post the same question on Stackoverflow and mail list but got few
replies, so tried here, forgive my taking the liberty.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
