Check table and column existence
To check if a table or particular table columns exist, execute a GraphQL query:
query GetTables {
keyspace(name: "library") {
name
tables {
name
columns {
name
kind
type {
basic
info {
name
}
}
}
}
}
}{
"data": {
"keyspace": {
"name": "library",
"tables": [
{
"name": "reader",
"columns": [
{
"name": "name",
"kind": "PARTITION",
"type": {
"basic": "VARCHAR",
"info": null
}
},
]
},
{
"name": "book",
"columns": [
{
"name": "title",
"kind": "PARTITION",
"type": {
"basic": "VARCHAR",
"info": null
}
},
{
"name": "author",
"kind": "REGULAR",
"type": {
"basic": "VARCHAR",
"info": null
}
},
{
"name": "isbn",
"kind": "REGULAR",
"type": {
"basic": "VARCHAR",
"info": null
}
}
]
}
]
}
}
}Because these queries are named, the GraphQL playground will allow you to select
which query to run. The first query will return information about the keyspace
library and the tables within it. The second query will return just information
about the tables in that keyspace.