userenv警告_userenv.dll_userenv错误(56)

ORA-10154: Switch to disallow synonyms in DDL statements

ORA-10155: CBO disable generation of transitive OR-chains

ORA-10156: CBO disable index fast full scan

ORA-10157: CBO disable index access path for in-list

ORA-10158: CBO preserve predicate order in post-filters

ORA-10159: CBO disable order-by sort pushdown into domain indexes

ORA-10160: CBO disable use of join index

ORA-10161: CBO recursive semi-join on/off-switch

ORA-10162: CBO join-back elimination on/off-switch

ORA-10163: CBO join-back elimination on/off-switch

ORA-10164: CBO disable subquery-adjusted cardinality fix

ORA-10166: trace long operation statistics updates

ORA-10167: CBO use old index MIN/MAX optimization

ORA-10168: CBO disable single-table predicate predicate generation

ORA-10169: CBO disable histograms for multi partitions

ORA-10170: CBO use old bitmap costing

ORA-10171: CBO disable transitive join predicates

ORA-10172: CBO force hash join back

ORA-10173: CBO no constraint-based join-back elimination

ORA-10174: view join-back elimination switch

ORA-10175: CBO star transformation switch

ORA-10176: CBO colocated join switch

ORA-10177: CBO colocated join switch

ORA-10179: CBO turn off transitive predicate replacement

ORA-10180: temp table transformation print error messages

ORA-10181: CBO disable multi-column in-list processing

ORA-10182: CBO disable generation of implied predicates

ORA-10183: CBO disable cost rounding

ORA-10185: CBO force index joins

ORA-10186: CBO disable index join

ORA-10187: CBO additional index join switch

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