PredicateExtractor not support String Expression

[kofkyobsa]

sharding jdbc & proxy
version:3.1.0
when i use sql like
" select snapshot_no from pt_item_base_snapshot where snapshot_no ='20190304152137155168409726302111' "
sharding-sphere can't get the value of column snapshot_no correctly
, it's always be -1;
I debug the source code ,in the class PredicateExtractor ,the method buildExpression
only support number:
Optional<ParserRuleContext> bitExprNode = ExtractorUtils.findFirstChildNode(valueNode, RuleName.BIT_EXPR); expressionNode = ExtractorUtils.findFirstChildNode(valueNode, RuleName.NUMBER); if (expressionNode.isPresent() && (!bitExprNode.isPresent() || 1 == bitExprNode.get().getChildCount())) { commonExpressionSegment.setValue(NumberUtil.getExactlyNumber(expressionNode.get().getText(), 10)); }

if I change code like ' expressionNode = ExtractorUtils.findFirstChildNode(valueNode, RuleName.STRING);' , the sql going well !

[codefairy08]

duplicate #1754