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Shivangi commented on CALCITE-6051: ----------------------------------- Also tested the same query you've shared on hive and spark: Hive: {code:java} select u&'hello world'; Error: Error while compiling statement: FAILED: SemanticException [Error 10004]: Line 1:7 Invalid table alias or column reference 'u': (possible column names are: ) (state=42000,code=10004) {code} Spark: {code:java} select u&'hello world'; User class threw exception: org.apache.spark.sql.AnalysisException: cannot resolve 'u' given input columns: []; line 1 pos 7; {code} > Incorrect format for unicode strings > ------------------------------------- > > Key: CALCITE-6051 > URL: https://issues.apache.org/jira/browse/CALCITE-6051 > Project: Calcite > Issue Type: Bug > Reporter: Shivangi > Priority: Major > Attachments: image-2023-10-16-18-54-53-483.png > > > Hi, > The unicodes returned by calcite have broken formats. For example, the string > `Conveniência` is converted into `u&'Conveni\00eancia'`. Here `u&` is > coming from > calcite-core-1.2.0-incubating-sources.jar!/org/apache/calcite/sql/SqlDialect.java > file, `quoteStringLiteralUnicode` method: > {code:java} > /** > * Converts a string into a unicode string literal. For example, > * <code>can't{tab}run\</code> becomes <code>u'can''t\0009run\\'</code>. > */ > public void quoteStringLiteralUnicode(StringBuilder buf, String val) { > buf.append("u&'"); > for (int i = 0; i < val.length(); i++) { > char c = val.charAt(i); > if (c < 32 || c >= 128) { > buf.append('\\'); > buf.append(HEXITS[(c >> 12) & 0xf]); > buf.append(HEXITS[(c >> 8) & 0xf]); > buf.append(HEXITS[(c >> 4) & 0xf]); > buf.append(HEXITS[c & 0xf]); > } else if (c == '\'' || c == '\\') { > buf.append(c); > buf.append(c); > } else { > buf.append(c); > } > } > buf.append("'"); > } > {code} > Why is `buf.append("u&'")` added in this method? I couldn't find relatable > unicode conversion that contains `u&`, as a result, it breaks when read by > the client. I wanted to understand the reason why `u&` is being used and what > can break if we remove `&`. > Thanks! -- This message was sent by Atlassian Jira (v8.20.10#820010)