Class RDBMSStringLengthFunction

java.lang.Object

com.kingsrook.qqq.backend.module.rdbms.fieldfunctions.RDBMSStringLengthFunction

All Implemented Interfaces:

BackendFieldFunctionAdapterInterface, RDBMSFieldFunctionAdapterInterface, Serializable

public class RDBMSStringLengthFunction
extends Object
implements RDBMSFieldFunctionAdapterInterface

RDBMS adapter for the StringLengthFunction that generates a CHAR_LENGTH(col) SQL expression.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
RDBMSStringLengthFunction()

Method Summary

Modifier and Type	Method	Description
String	wrapColumnName(String escapedColumnName, FieldFunction fieldFunction, Function<String,String> fieldNameToColumnReference)	Returns a CHAR_LENGTH(col) SQL expression for the given escaped column name.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.kingsrook.qqq.backend.module.rdbms.fieldfunctions.RDBMSFieldFunctionAdapterInterface

getParams, wrapColumnNameForOrderBy

Constructor Details

RDBMSStringLengthFunction

public RDBMSStringLengthFunction()

Method Details

wrapColumnName

public String wrapColumnName(String escapedColumnName,
 FieldFunction fieldFunction,
 Function<String,String> fieldNameToColumnReference)

Returns a CHAR_LENGTH(col) SQL expression for the given escaped column name.

Specified by:

wrapColumnName in interface RDBMSFieldFunctionAdapterInterface

Parameters:

escapedColumnName - a fully qualified and escaped SQL column name for the 'main' field that this function works with (e.g., FieldFunction#withFieldName(String). Looks like: `my_table`.`my_field`.

fieldFunction - the function with arguments, being used.

fieldNameToColumnReference - resolves a QQQ field name to its fully- qualified escaped SQL column reference (e.g., "timeZone" → `t1`.`time_zone`). Useful when the function expression needs to reference additional columns on the same row.