26.13.1 PgqlResultSetからPgxFrameへの変換

次の例では、PgqlResultSetをPgxFrameに保存する方法について説明します。

• JShell
• Java
• Python

opg4j> var pg = session.readGraphByName("BANK_GRAPH",GraphSource.PG_PGQL)
opg4j> var rs = pg.queryPgql("SELECT e.* FROM MATCH (v1:Accounts)-[e:Transfers]->(v2:Accounts) LIMIT 5")
opg4j> var rsFrame = rs.toFrame()
opg4j> rsFrame.print()
+--------------------------------------------------+
| FROM_ACCT_ID | TO_ACCT_ID | AMOUNT | DESCRIPTION |
+--------------------------------------------------+
| 999          | 934        | 1000.0 | transfer    |
| 999          | 71         | 1000.0 | transfer    |
| 999          | 839        | 1000.0 | transfer    |
| 999          | 891        | 1000.0 | transfer    |
| 999          | 919        | 1000.0 | transfer    |
+--------------------------------------------------+
$4 ==> oracle.pgx.api.frames.internal.PgxFrameImpl@39a1c200

import oracle.pgx.api.frames.*;

PgxGraph pg = session.readGraphByName("BANK_GRAPH",GraphSource.PG_PGQL);
PgqlResultSet rs = pg.queryPgql("SELECT e.* FROM MATCH (v1:Accounts)-[e:Transfers]->(v2:Accounts) LIMIT 5");
PgxFrame rsFrame = rs.toFrame();
rsFrame.print();

>>> pg = session.read_graph_by_name('BANK_GRAPH','pg_pgql')
>>> rs = pg.query_pgql("SELECT e.* FROM MATCH (v1:Accounts)-[e:Transfers]->(v2:Accounts) LIMIT 5")
>>> rs_frame = rs.to_frame()
>>> rs_frame.print()
+--------------------------------------------------+
| FROM_ACCT_ID | TO_ACCT_ID | AMOUNT | DESCRIPTION |
+--------------------------------------------------+
| 1            | 418        | 1000.0 | transfer    |
| 1            | 584        | 1000.0 | transfer    |
| 1            | 644        | 1000.0 | transfer    |
| 1            | 672        | 1000.0 | transfer    |
| 1            | 259        | 1000.0 | transfer    |
+--------------------------------------------------+

PgqlResultSetからpandas DataFrameへの変換

次の例に示すように、PgqlResultSetをpandas DataFrameに保存することもできます。

>>> rs.to_pandas()
   FROM_ACCT_ID  TO_ACCT_ID  AMOUNT DESCRIPTION
0           999         934  1000.0    transfer
1           999          71  1000.0    transfer
2           999         839  1000.0    transfer
3           999         891  1000.0    transfer
4           999         919  1000.0    transfer