Built-in functions and Stored Procedures
Contents
Overview
The HSQLdb database engine included with Base supports the following functions and stored procedures for use within queries.
The Query component in Base allows for SQL commands that return a result set. i.e. SELECT and CALL
The component supports two views:
- GUI Query Designer (Designer View)
- Text editor (SQL View)
Queries created and executed in Designer and SQL View support the use of named replaceable parameters in these statements, in most cases. Use of this feature is controlled by the option 'Escape Processing'.
Escape Processing is always ENABLED when using Designer View.
Escape Processing is ENABLED by default in SQL View, but may be DISABLED by selecting the 'Run SQL directly' tool button.
The SQL window in Base (opened with the menu commands TOOLS > SQL) allows any valid SQL statement to be executed, but it does not return any data results to the user. Statements executed in this window serve two main purposes.
- Data Manipulation Language ( DML ) statements. i.e. UPDATE, DELETE, INSERT.
- Data Definition Language ( DDL ) statements. i.e. CREATE TABLE, ALTER TABLE, etc.
Multiple statements may be executed as a batch by ending each statement with a semi-colon.
All functions listed below are available for use in the SQL window.
Each table below is formatted as follows:
- Function Name - this is the actual function, along with required or optional parameters
- Designer - Yes in this column means it may be used in Designer View. No, the function must be used in SQL View.
- Esc Proc - Yes in this column means it may be used in SQL View, with escape processing ENABLED. No, the function is only available in SQL View with escape processing DISABLED.
- Comments - A brief description of what the function does, the parameters expected and the type of output generated.
Numerical Functions
Function Name | Desinger | Esc Proc | Comments |
---|---|---|---|
ABS(d) | YES | YES | Returns the absolute value of a number. ABS(-1) = ABS(1) |
ACOS(d) | YES | YES | Returns the arc cosine of an angle, in the range of 0.0 through pi. ACOS(.5) = 1.05 |
ASIN(d) | YES | YES | Returns the arc sine of an angle, in the range of -pi/2 through pi/2. ASIN(.5) = 0.52 |
ATAN(d) | YES | YES | Returns the arc tangent of an angle, in the range of -pi/2 through pi/2. ATAN(.5) = 0.46 |
ATAN2(a,b) | YES | YES | Returns the tangent of a/b. ATAN2(1,2) = 0.46 |
BITAND(a,b) | YES | YES | Returns a & b. BITAND(0,1) = 0 |
BITOR(a,b) | YES | YES | Returns a | b BITOR(0,1) = 1 |
CEILING(d) | YES | YES | returns the smallest integer that is not less than d CEILING( 8.7 ) = 9 |
COS(d) | YES | YES | Returns the trigonometric cosine of an angle. COS( .5 ) = 0.88 |
COT(d) | YES | YES | |
DEGREES(d) | YES | YES | |
EXP(d) | YES | YES | |
FLOOR(d) | YES | YES | |
LOG(d) | YES | YES | |
LOG10(d) | YES | YES | |
MOD(a,b) | YES | YES | |
PI() | YES | YES | |
POWER(a,b) | YES | YES | |
RADIANS(d) | YES | YES | |
RAND() | YES | YES | |
ROUND(a,b) | YES | YES | |
ROUNDMAGIC(d) | YES | YES | |
SIGN( d ) | YES | YES | |
SIN(d) | YES | YES | |
SQRT( d ) | YES | YES | |
TAN( A ) | YES | YES | |
TRUNCATE(a,b) | YES | YES |
Statistical Functions
Function Name | Desinger | Esc Proc | Comments |
VAR_POP | |||
VAR_SAMP | |||
STDDEV_POP | |||
STDDEV_SAMP |
String Fnctions
Function Name | Desinger | Esc Proc | Comments |
ASCII(s) | YES | YES | |
BIT_LENGTH(str) | YES | YES | |
CHAR(c) | YES | YES | |
CHAR_LENGTH(str) | YES | YES | |
CONCAT(str1,str2) | YES | YES | |
DIFFERENCE(s1,s2) | YES | YES | |
HEXTORAW(s1) | YES | YES | |
INSERT(s,start,len,s2) | YES | YES | |
LCASE(s) | YES | YES | |
LEFT(s,count) | YES | YES | |
LENGTH(s) | YES | YES | |
LOCATE(search,s,[start]) | YES | YES | |
LTRIM(s) | YES | YES | |
OCTET_LENGTH(str) | YES | YES | |
RAWTOHEX(s1) | YES | YES | |
POSITION (... IN ..) | YES | YES | |
REPEAT(s,count) | YES | YES | |
REPLACE(s,replace,s2) | YES | YES | |
RIGHT(s,count) | YES | YES | |
RTRIM(s) | YES | YES | |
SOUNDEX(s) | YES | YES | |
SPACE(count) | YES | YES | |
SUBSTR(s,start[,len]) | YES | YES | |
SUBSTRING(s,start[,len]) | YES | YES | |
SUBSTRING(... FROM ... FOR ...) | YES | YES | |
TRIM( LEADING TRAILING BOTH FROM <COLUMN> ) | YES | YES | |
UCASE(s) | YES | YES | |
LOWER(s) | YES | YES | |
UPPER(s) | YES | YES |
Date and Time Functions
Function Name | Desinger | Esc Proc | Comments |
CURDATE() | YES | YES | |
CURTIME() | YES | YES | |
DATEDIFF(string, datetime1, datetime2) | YES | YES | |
DAYNAME(date) | YES | YES | |
DAYOFMONTH(date) | YES | YES | |
DAYOFWEEK(date) | YES | YES | |
DAYOFYEAR(date) | YES | YES | |
HOUR(time) | YES | YES | |
MINUTE(time) | YES | YES | |
MONTH(date) | YES | YES | |
MONTHNAME(date) | YES | YES | |
NOW() | YES | YES | |
QUARTER(date) | YES | YES | |
SECOND(time) | YES | YES | |
WEEK(date) | YES | YES | |
YEAR(date) | YES | YES | |
CURRENT_DATE | YES | YES | |
CURRENT_TIME | YES | YES | |
CURRENT_TIMESTAMP | YES | YES | |
TO_CHAR( <date column>, format String ) | YES | YES |
System Functions
Function Name | Desinger | Esc Proc | Comments |
DATABASE() | YES | YES | |
USER() | NO | NO | |
CURRENT_USER | YES | YES | |
IDENTITY() | YES | YES |