Global Functions

Table 4 lists restrictions on the global functions associated with RWDBExpr.

Table 236. Restrictions on the use of global functions
Function	Restrictions
`rwdbAvg(const RWDBExpr&)`	None. Corresponds to: `AVG(expr)`
rwdbCast(const RWDBExpr&, const RWDBValue&)	See rwdbCast().
rwdbCast(const RWDBExpr&, const RWDBValue&, const RWDBExpr&)	See rwdbCast().
rwdbCast(const RWBDExpr&, const RWDBValue&, const RWDBExpr&, const RWDBExpr&)	See rwdbCast().
`rwdbCharLength(const RWDBExpr&)`	None. Corresponds to: `LENGTH(expr)`
`rwdbCount()`	None. Corresponds to: `COUNT(*)`
`rwdbCount(const RWDBExpr&)`	None. Corresponds to: `COUNT(expr)`
`rwdbCountDistinct(const RWDBExpr&)`	None. Corresponds to: `COUNT(DISTINCT expr)`
`rwdbCurrentUser()`	None. Corresponds to: `SYS_CONTEXT('USERENV','CURRENT_USER')`
`rwdbExists(const RWDBSelectorBase&)`	None. Corresponds to: `EXISTS(sel)`
`rwdbLower(const RWDBExpr&)`	None. Corresponds to: `LOWER(expr)`
`rwdbMax(const RWDBExpr&)`	None. Corresponds to: `MAX(expr)`
`rwdbMin(const RWDBExpr&)`	None. Corresponds to: `MIN(expr)`
rwdbName(const RWCString&, const RWDBExpr&)	None. Corresponds to: `expr string`
rwdbPosition(const RWDBExpr&, const RWDBExpr&)	None. Corresponds to: `INSTR(expr1, expr0)`
`rwdbSessionUser()`	None. Corresponds to: `SYS_CONTEXT('USERENV','SESSION_USER')`
rwdbSubString(const RWDBExpr&, const RWDBExpr&)	None. Corresponds to: `SUBSTR(expr0, expr1)`
rwdbSubString(const RWDBExpr&, const RWDBExpr&, const RWDBExpr&)	None. Corresponds to: `SUBSTR(expr0, expr1, expr2)`
`rwdbSum(const RWDBExpr&)`	None. Corresponds to: `SUM(expr)`
`rwdbSystemDateTime()`	None. Corresponds to: `SYSDATE`
`rwdbSystemUser()`	None. Corresponds to: `SYS_CONTEXT('USERENV','OS_USER')`
rwdbTrimLeading(const RWDBExpr&, const RWDBExpr&)	None. Corresponds to: `LTRIM(expr1, expr0)`
rwdbTrimTrailing(const RWDBExpr&, const RWDBExpr&)	None. Corresponds to: `RTRIM(expr1, expr0)`
rwdbTrimBoth(const RWDBExpr&, const RWDBExpr&)	None. Corresponds to: `LTRIM(RTRIM(expr1, expr0), expr0)`
`rwdbUpper(const RWDBExpr&)`	None. Corresponds to: `UPPER(expr)`