[CASSANDRA-12189] $$ escaped string literals are not handled correctly in cqlsh - ASF JIRA

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The syntax rules for pg ($$) escaped string literals in cqlsh do not match the lexer rule for this type in Lexer.g.

The unclosedPgString rule is not correctly matching pg string literals in multi-line statements so:

INSERT INTO test.test (id) values (
...$$<xml/>

fails with a syntax error at the forward slash.

Both pgStringLiteral and unclosedPgString fail with the following string

$$a$b$$

where this is allowed by the CQL lexer rule.

is duplicated by

CASSANDRA-12187 $$ escaped string literals are not handled correctly in cqlsh

relates to

CASSANDRA-15948 Multiple failures in cqlsh_tests.test_cqlsh.TestCqlsh