parserUtil.c

/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "parserUtil.h"

int32_t buildInvalidOperationMsg(SMsgBuf* pBuf, const char* msg) {
  strncpy(pBuf->buf, msg, pBuf->len);
  return TSDB_CODE_TSC_INVALID_OPERATION;
}

int32_t buildSyntaxErrMsg(SMsgBuf* pBuf, const char* additionalInfo, const char* sourceStr) {
  const char* msgFormat1 = "syntax error near \'%s\'";
  const char* msgFormat2 = "syntax error near \'%s\' (%s)";
  const char* msgFormat3 = "%s";

  const char* prefix = "syntax error";
  if (sourceStr == NULL) {
    assert(additionalInfo != NULL);
    snprintf(pBuf->buf, pBuf->len, msgFormat1, additionalInfo);
    return TSDB_CODE_TSC_SQL_SYNTAX_ERROR;
  }

  char buf[64] = {0};  // only extract part of sql string
  strncpy(buf, sourceStr, tListLen(buf) - 1);

  if (additionalInfo != NULL) {
    snprintf(pBuf->buf, pBuf->len, msgFormat2, buf, additionalInfo);
  } else {
    const char* msgFormat = (0 == strncmp(sourceStr, prefix, strlen(prefix))) ? msgFormat3 : msgFormat1;
    snprintf(pBuf->buf, pBuf->len, msgFormat, buf);
  }

  return TSDB_CODE_TSC_SQL_SYNTAX_ERROR;
}

int32_t parserValidateIdToken(SToken* pToken) {
  if (pToken == NULL || pToken->z == NULL || pToken->type != TK_NK_ID) {
    return TSDB_CODE_TSC_INVALID_OPERATION;
  }

  // it is a token quoted with escape char '`'
  if (pToken->z[0] == TS_ESCAPE_CHAR && pToken->z[pToken->n - 1] == TS_ESCAPE_CHAR) {
    return TSDB_CODE_SUCCESS;
  }

  char* sep = strnchr(pToken->z, TS_PATH_DELIMITER[0], pToken->n, true);
  if (sep == NULL) {  // It is a single part token, not a complex type
    if (isNumber(pToken)) {
      return TSDB_CODE_TSC_INVALID_OPERATION;
    }

    strntolower(pToken->z, pToken->z, pToken->n);
  } else {  // two part
    int32_t oldLen = pToken->n;
    char*   pStr = pToken->z;

    if (pToken->type == TK_SPACE) {
      pToken->n = (uint32_t)strtrim(pToken->z);
    }

    pToken->n = tGetToken(pToken->z, &pToken->type);
    if (pToken->z[pToken->n] != TS_PATH_DELIMITER[0]) {
      return TSDB_CODE_TSC_INVALID_OPERATION;
    }

    if (pToken->type != TK_NK_ID) {
      return TSDB_CODE_TSC_INVALID_OPERATION;
    }

    int32_t firstPartLen = pToken->n;

    pToken->z = sep + 1;
    pToken->n = (uint32_t)(oldLen - (sep - pStr) - 1);
    int32_t len = tGetToken(pToken->z, &pToken->type);
    if (len != pToken->n || pToken->type != TK_NK_ID) {
      return TSDB_CODE_TSC_INVALID_OPERATION;
    }

    // re-build the whole name string
    if (pStr[firstPartLen] == TS_PATH_DELIMITER[0]) {
      // first part do not have quote do nothing
    } else {
      pStr[firstPartLen] = TS_PATH_DELIMITER[0];
      memmove(&pStr[firstPartLen + 1], pToken->z, pToken->n);
      uint32_t offset = (uint32_t)(pToken->z - (pStr + firstPartLen + 1));
      memset(pToken->z + pToken->n - offset, ' ', offset);
    }

    pToken->n += (firstPartLen + sizeof(TS_PATH_DELIMITER[0]));
    pToken->z = pStr;

    strntolower(pToken->z, pToken->z, pToken->n);
  }

  return TSDB_CODE_SUCCESS;
}

int32_t KvRowAppend(const void *value, int32_t len, void *param) {
  SKvParam* pa = (SKvParam*) param;

  int32_t type  = pa->schema->type;
  int32_t colId = pa->schema->colId;

  if (TSDB_DATA_TYPE_BINARY == type) {
    STR_WITH_SIZE_TO_VARSTR(pa->buf, value, len);
    tdAddColToKVRow(pa->builder, colId, type, pa->buf);
  } else if (TSDB_DATA_TYPE_NCHAR == type) {
    // if the converted output len is over than pColumnModel->bytes, return error: 'Argument list too long'
    int32_t output = 0;
    if (!taosMbsToUcs4(value, len, varDataVal(pa->buf), pa->schema->bytes - VARSTR_HEADER_SIZE, &output)) {
      return TSDB_CODE_TSC_SQL_SYNTAX_ERROR;
    }

    varDataSetLen(pa->buf, output);
    tdAddColToKVRow(pa->builder, colId, type, pa->buf);
  } else {
    tdAddColToKVRow(pa->builder, colId, type, value);
  }

  return TSDB_CODE_SUCCESS;
}

static uint32_t getTableMetaSize(const STableMeta* pTableMeta) {
  assert(pTableMeta != NULL);

  int32_t totalCols = 0;
  if (pTableMeta->tableInfo.numOfColumns >= 0) {
    totalCols = pTableMeta->tableInfo.numOfColumns + pTableMeta->tableInfo.numOfTags;
  }

  return sizeof(STableMeta) + totalCols * sizeof(SSchema);
}

STableMeta* tableMetaDup(const STableMeta* pTableMeta) {
  assert(pTableMeta != NULL);
  size_t size = getTableMetaSize(pTableMeta);

  STableMeta* p = malloc(size);
  memcpy(p, pTableMeta, size);
  return p;
}

SSchema *getTableColumnSchema(const STableMeta *pTableMeta) {
  assert(pTableMeta != NULL);
  return (SSchema*) pTableMeta->schema;
}

static SSchema* getOneColumnSchema(const STableMeta* pTableMeta, int32_t colIndex) {
  assert(pTableMeta != NULL && pTableMeta->schema != NULL && colIndex >= 0 && colIndex < (getNumOfColumns(pTableMeta) + getNumOfTags(pTableMeta)));

  SSchema* pSchema = (SSchema*) pTableMeta->schema;
  return &pSchema[colIndex];
}

SSchema* getTableTagSchema(const STableMeta* pTableMeta) {
  assert(pTableMeta != NULL && (pTableMeta->tableType == TSDB_SUPER_TABLE || pTableMeta->tableType == TSDB_CHILD_TABLE));
  return getOneColumnSchema(pTableMeta, getTableInfo(pTableMeta).numOfColumns);
}

int32_t getNumOfColumns(const STableMeta* pTableMeta) {
  assert(pTableMeta != NULL);
  // table created according to super table, use data from super table
  return getTableInfo(pTableMeta).numOfColumns;
}

int32_t getNumOfTags(const STableMeta* pTableMeta) {
  assert(pTableMeta != NULL);
  return getTableInfo(pTableMeta).numOfTags;
}

STableComInfo getTableInfo(const STableMeta* pTableMeta) {
  assert(pTableMeta != NULL);
  return pTableMeta->tableInfo;
}