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| - | ====== Omnidex SQL: Functions ====== | ||
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| - | ===== Standard SQL Functions ===== | ||
| - | The Omnidex SQL Language supports several standard SQL Functions. These functions operate as defined in the SQL specification. | ||
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| - | ^ SQL Functions ^ Description ^ | ||
| - | | [[ CASE ]] | Allows simple IF..THEN..ELSE logic in a select-item. | | ||
| - | | [[ CAST ]] | Convert an expression to a specific data type. | | ||
| - | | [[ dev:sql:functions:character_length:home | CHAR[ACTER]_LENGTH ]] | Return the number of characters in a string. | | ||
| - | | [[ dev:sql:functions:concatenation | || (Concatenation) ]] | Concatenate multiple columns or strings into a single character string. | | ||
| - | | [[ CURRENT_DATE]] | Return the current data from the system clock. | | ||
| - | | [[ CURRENT_TIME]] | Return the current time from the system clock. | | ||
| - | | [[ CURRENT_TIMESTAMP]] | Return the current timestamp from the system clock. | | ||
| - | | [[ CURRENT_USER]] | Return the current Omnidex user. | | ||
| - | | [[ EXTRACT]] | Extract an individual field value from a date_class data type field. | | ||
| - | | [[ LOWER]] | Convert all characters in a text string to lower case. | | ||
| - | | [[ POSITION]] | Return the position of a string within another string. | | ||
| - | | [[ SUBSTRING]] | Return a specific part of a string. | | ||
| - | | [[ SESSION_USER]] | Return the current Omnidex user. | | ||
| - | | [[ SYNONYMS]] | Use synonyms of a word or phrase as qualification criteria. | | ||
| - | | [[ SYSTEM_USER]] | Return the current system user. | | ||
| - | | [[ TRIM ]] | Remove leading and/or trailing "pad" characters from a string. | | ||
| - | | [[ UPPER ]] | Convert all characters in a text string to upper case. | | ||
| - | | [[ USER ]] | Return the current Omnidex user. | | ||
| - | ===== Omnidex Extended Functions ===== | ||
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| - | The Omnidex SQL Language supports several functions that are extensions to the standard SQL Functions. Extended functions are prefixed with a ( %%$%% ) so that they are easy to locate in existing SQL code. | ||
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| - | ^ Omnidex Functions ^ Description ^ | ||
| - | | [[ $CALC_DATE ]] | | | ||
| - | | [[ dev:sql:functions:col_length | $COL[UMN]_LENGTH ]] | Return the length of a column as defined in the environment catalog. Same as $COL_LEN. | | ||
| - | | [[ dev:sql:functions:contains:home | $CONTAINS ]] | | | ||
| - | | [[ dev:sql:functions:context:home | $CONTEXT ]] | Return snippets of text from data qualified in a $CONTAINS function. | | ||
| - | | [[ $CONVERT ]] | Convert a scalar expression from one data type to another. | | ||
| - | | [[ $COMPARE_DATE]] | | | ||
| - | | [[ $CURRENT_ROW ]] | Return the current row number. | | ||
| - | | [[ $DISTANCE ]] | | | ||
| - | | [[ $EXTERNAL ]] | Execute an external user-defined function. | | ||
| - | | [[ [[ dev:sql:functions:highlight_criteria:home | $HIGHLIGHT_CRITERIA ]] | | | ||
| - | | [[ [[ dev:sql:functions:highlight_keywords:home | $HIGHLIGHT_KEYWORDS ]] | | | ||
| - | | [[ $IFNULL ]] | Specify a return value for columns containing null values. | | ||
| - | | [[ $LJ ]] | Left justify a string by eliminating leading white space. | | ||
| - | | [[ [[ dev:sql:functions:lookup:home | $LOOKUP ]] | Retrieve textual metadata. | | ||
| - | | [[ $LPAD ]] | Add leading "PAD" characters to a string. | | ||
| - | | [[ $MOD ]] | Return "n modulus y" (remainder). | | ||
| - | | [[ $PROPER ]] | Shift the first letter of each word in a string to upper case and all other letters to lower case. | | ||
| - | | [[ $RANDOM ]] | Return a pseudo-random number. | | ||
| - | | [[ $RJ ]] | Right justify a string by eliminating trailing white space and inserting leading spaces as needed. | | ||
| - | | [[ $ROUND ]] | Round a numerical value to the specified number of decimal places. | | ||
| - | | [[ $RPAD ]] | Add trailing "PAD" characters to a string. | | ||
| - | | [[ $SCORE ]] | Returns the rank/relevancy score of qualified text from a $CONTAINS function. | | ||
| - | | [[ $SOUNDEX ]] | Return the Soundex equivalent to a character string. | | ||
| - | | [[ $TRUNC ]] | Return a numeric expression truncated to a specified number of digits to the right of the decimal point. | | ||
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