[IMPALA-10680] Replace StringToFloatInternal that converts String to Float using fast_double_parser library

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Impala 4.1.0
• Epic Color: ghx-label-9
• Assignee: Amogh Margoor
• Reporter: Amogh Margoor
• Created: 27/Apr/21 09:23
• Updated: 03/Dec/21 05:47
• Resolved: 23/Aug/21 10:42

Description

Based on the comment made by csringhofer here, we can use fast_double_parser (introduced by IMPALA-10654) to do String to Double conversion here. This would ensure precision loss can be avoided in cases like below:

select cast("0.43149576573887316" as double);
result: 0.4314957657388731