Commit changes takes age

Question

Hello,
I dragged a data provider in the ui, it works well, but when I do:
addressesDataProvider.commitChanges();
it takes about 25 seconds to complete.
I tried with the simplest page, without any change to dataprovider or rowset but all call to commitChanges takes age.
Any idea where it could comes from?
Regards
Kuon

Answer 1

After paying attention to the database side, I can see this query:
SELECT NULL AS table_cat, t.owner AS table_schem,t.table_name AS table_name,t.column_name AS column_name, DECODE (t.data_type, 'CHAR', 1, 'CLOB', 2005, 'BLOB', 2004, 'VARCHAR2', 12, 'NUMBER', 3, 'LONG', -1, 'DATE', 93,'RAW', -3, 'LONG RAW', -4, 'BINARY_FLOAT', 7, 'BINARY_DOUBLE', 8, 'XMLTYPE',2005, 'BFILE',2004,'NCHAR',1, 'NVARCHAR2',12, 'NCLOB', 2005, 'ROWID', 12, 'FLOAT', 8, 1111)
AS data_type, t.data_type AS type_name, decode(t.data_type, 'NUMBER', decode(t.data_precision, null, decode(t.data_scale, null, 0, 0, 38, t.data_scale), t.data_precision), 'FLOAT', 15, 'CLOB',2147483647, 'NCLOB', 2147483647, 'LONG', 2147483647, 'BLOB', 2147483647, 'LONG RAW', 2147483647, 'BFILE', 2147483647, 'DATE', 19, 'ROWID', 18, 'BINARY_FLOAT', 7, 'BINARY_DOUBLE', 15,decode(t.data_length, 0, 1, t.data_length)) as column_size, 0 AS buffer_length, decode(t.data_type, 'NUMBER', decode(t.data_scale, null, decode(t.data_precision, null, 0,null), t.data_scale), 'FLOAT', NULL,'DATE', 0, NULL) AS decimal_digits, decode(t.data_type, 'BINARY_FLOAT', 10, 'BINARY_DOUBLE', 10, 'FLOAT', 10, 'NUMBER', 10, NULL) AS num_prec_radix, DECODE (t.nullable, 'N', 0, 1) AS nullable, NULL AS remarks,NULL AS column_def, null AS sql_data_type, null AS sql_datetime_sub, decode(t.data_type, 'VARCHAR2', decode(t.data_length, 0, 1, t.data_length), 'CHAR', t.data_length, 'NCHAR', t.data_length, 'CLOB', 2147483647, 'NCLOB', 2147483647, 'LONG', 2147483647, 'BFILE', 2147483647, NULL) AS char_octet_length, t.column_id AS ordinal_position, DECODE (t.nullable, 'N', 'NO', 'YES') AS is_nullable, null as SCOPE_CATLOG, null as SCOPE_SCHEMA, null as SCOPE_TABLE, null as SOURCE_DATA_TYPE FROM all_tab_columns t WHERE t.owner LIKE 'AKIRA' ESCAPE '\' AND t.table_name LIKE 'AK_DATA' ESCAPE '\' AND t.column_name LIKE '%' ESCAPE '\' UNION ALL SELECT NULL, asy.owner, asy.synonym_name , t.column_name,
DECODE (t.data_type, 'CHAR', 1, 'CLOB', 2005, 'BLOB', 2004, 'VARCHAR2', 12, 'NUMBER', 3, 'LONG', -1, 'DATE', 93,'RAW', -3, 'LONG RAW', -4, 'BINARY_FLOAT', 7, 'BINARY_DOUBLE', 8, 'XMLTYPE',2005, 'BFILE',2004,'NCHAR',1, 'NVARCHAR2',12, 'NCLOB', 2005, 'ROWID', 12, 'FLOAT', 8, 1111), t.data_type, decode(t.data_type, 'NUMBER', decode(t.data_precision, null, decode(t.data_scale, null, 0, 0, 38, t.data_scale), t.data_precision), 'FLOAT', 15, 'CLOB',2147483647, 'NCLOB', 2147483647, 'LONG', 2147483647, 'BLOB', 2147483647, 'LONG RAW',2147483647, 'BFILE', 2147483647, 'DATE', 19, 'ROWID', 18, 'BINARY_FLOAT', 7, 'BINARY_DOUBLE', 15,decode(t.data_length, 0, 1, t.data_length)), 0, decode(t.data_type, 'NUMBER', nvl(t.data_scale, 0), 'DATE', 0, 'FLOAT', NULL, NULL) AS decimal_digits, decode(t.data_type, 'FLOAT', 10, 'NUMBER', 10, NULL), DECODE (t.nullable, 'N', 0, 1), NULL, NULL, null, null, decode(t.data_type, 'VARCHAR2', decode(t.data_length, 0, 1, t.data_length), 'CHAR', t.data_length, 'NCHAR', t.data_length, 'CLOB', 2147483647, 'NCLOB', 2147483647, 'LONG', 2147483647, 'BFILE', 2147483647, NULL), t.column_id, DECODE (t.nullable, 'N', 'NO', 'YES'), null, null, null, null FROM all_synonyms asy, all_tab_columns t WHERE t.table_name = asy.table_name AND t.owner = asy.table_owner AND t.column_name LIKE '%' ESCAPE '\' AND asy.owner LIKE 'AKIRA' ESCAPE '\' AND asy.synonym_name LIKE 'AK_DATA' ESCAPE '\' ORDER BY table_schem, table_name, ordinal_positionWhich appear very often, and this is a quite long query.
What the heck is this?
Any help, pointer is appreciated.