Searching in Interactive Grids may not give the results you expect.
The search only returns results for Text columns, so numbers, dates, etc. are ignored.

The obvious solution is to convert numbers etc. to an (extra) text column, and then use that in the report. In the example below I've done that with Empno.
There is another option however, using LOVs. It's a bit weird to (mis)use a "select null from dual" for that, but it does work. See the Deptno, Mgr and Hiredate columns below. And not having to convert columns and/or define extra columns is a nice bonus as well.

In the examples below, the first (standard) IG will only show search results for text (Ename) and number (Deptno and Mgr) columns.
The second (text + LOV) IG will show search results for all columns.

Region

Identification
	Sequence	20
	Title	EMP
	Type	Interactive Grid
Source
	Source Type	NATIVE_IG
	Table Name	TED_P1183_V

View

View
	Name	ted_p1183_v
	DDL	select e.empno ,e.ename ,e.deptno ,e.mgr ,e.hiredate from emp e

Report Column

Definition
	Column Name	EMPNO
	Type	NATIVE_NUMBER_FIELD
Heading
	Column Heading	Empno

Report Column

Definition
	Column Name	ENAME
	Type	NATIVE_TEXT_FIELD
Heading
	Column Heading	Ename

Report Column

Definition
	Column Name	DEPTNO
	Type	NATIVE_NUMBER_FIELD
Heading
	Column Heading	Deptno

Report Column

Definition
	Column Name	MGR
	Type	NATIVE_NUMBER_FIELD
Heading
	Column Heading	Mgr

Report Column

Definition
	Column Name	HIREDATE
	Type	NATIVE_DATE_PICKER_APEX
Heading
	Column Heading	Hiredate
Settings
	Based On	POPUP
Appearance
	Format Mask	DD-MM-YYYY

Region

Identification
	Sequence	30
	Title	EMP_TEXT
	Type	Interactive Grid
Source
	Source Type	NATIVE_IG
	Table Name	TED_P1183_TEXT_V

View

View
	Name	ted_p1183_text_v
	DDL	select to_char(e.empno) as empno_text ,e.ename ,e.deptno as deptno_lov ,e.mgr as mgr_lov ,e.hiredate as hiredate_lov from emp e

Report Column

Definition
	Column Name	EMPNO_TEXT
	Type	NATIVE_TEXT_FIELD
Heading
	Column Heading	Empno Text

Report Column

Definition
	Column Name	ENAME
	Type	NATIVE_TEXT_FIELD
Heading
	Column Heading	Ename

Report Column

Definition
	Column Name	DEPTNO_LOV
	Type	NATIVE_DISPLAY_ONLY
Heading
	Column Heading	Deptno Lov
Settings
	Based On	LOV
Column Definition
	Type	SQL Query
	SQL Query	select dname as d, deptno as r from dept
	Display Extra Values	Yes

Report Column

Definition
	Column Name	MGR_LOV
	Type	NATIVE_DISPLAY_ONLY
Heading
	Column Heading	Mgr Lov
Settings
	Based On	LOV
Column Definition
	Type	SQL Query
	SQL Query	select null as d, null as r from dual
	Display Extra Values	Yes

Report Column

Definition
	Column Name	HIREDATE_LOV
	Type	NATIVE_DISPLAY_ONLY
Heading
	Column Heading	Hiredate Lov
Settings
	Based On	LOV
Appearance
	Format Mask	DD-MM-YYYY
Column Definition
	Type	SQL Query
	SQL Query	select null as d, null as r from dual
	Display Extra Values	Yes